From c987f34693c4da92adc28f3fd68ea279067ff9c4 Mon Sep 17 00:00:00 2001 From: Max Wash Date: Fri, 27 Jun 2025 21:53:40 +0100 Subject: [PATCH] meta: add serial module for (de)serialising objects --- CMakeLists.txt | 2 +- serial-test/streams.c | 39 + serial/CMakeLists.txt | 3 + serial/bitcode.c | 3 + serial/include/blue/serial.h | 34 + serial/json.c | 3307 ++++++++++++++++++++++++++++++++++ serial/json.h | 373 ++++ serial/serial.c | 82 + serial/serial.h | 20 + 9 files changed, 3862 insertions(+), 1 deletion(-) create mode 100644 serial-test/streams.c create mode 100644 serial/CMakeLists.txt create mode 100644 serial/bitcode.c create mode 100644 serial/include/blue/serial.h create mode 100644 serial/json.c create mode 100644 serial/json.h create mode 100644 serial/serial.c create mode 100644 serial/serial.h diff --git a/CMakeLists.txt b/CMakeLists.txt index 38343db..91440d5 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -5,7 +5,7 @@ include (TestBigEndian) set_property(GLOBAL PROPERTY USE_FOLDERS ON) -set(b_modules core object term cmd io) +set(b_modules core object serial term cmd io) set(b_system_name ${CMAKE_SYSTEM_NAME}) string(TOLOWER ${b_system_name} b_system_name) diff --git a/serial-test/streams.c b/serial-test/streams.c new file mode 100644 index 0000000..ac7b6b7 --- /dev/null +++ b/serial-test/streams.c @@ -0,0 +1,39 @@ +#include +#include +#include +#include +#include +#include +#include + +int main(void) +{ + b_serial_ctx *ctx; + b_serial_ctx_create(&ctx); + + b_dict *dict = b_dict_create(); + + b_array *array = b_array_create(); + b_array_append(array, B_RV_INT(32)); + b_array_append(array, B_RV_INT(64)); + b_array_append(array, B_RV_INT(128)); + + b_dict_put(dict, "numbers", B_RV(array)); + + array = b_array_create(); + b_array_append(array, B_RV_CSTR("hello")); + b_array_append(array, B_RV_CSTR("world")); + + b_dict_put(dict, "strings", B_RV(array)); + + b_to_string(B_OBJECT(dict), b_stdout); + b_stream_write_char(b_stdout, '\n'); + + b_serial_ctx_serialise( + ctx, B_SERIAL_FORMAT_JSON, B_OBJECT(dict), b_stdout, 0); + + b_dict_release(dict); + b_serial_ctx_destroy(ctx); + + return 0; +} diff --git a/serial/CMakeLists.txt b/serial/CMakeLists.txt new file mode 100644 index 0000000..25fdef4 --- /dev/null +++ b/serial/CMakeLists.txt @@ -0,0 +1,3 @@ +include(../cmake/Templates.cmake) + +add_bluelib_module(NAME serial DEPENDENCIES core object) diff --git a/serial/bitcode.c b/serial/bitcode.c new file mode 100644 index 0000000..683667c --- /dev/null +++ b/serial/bitcode.c @@ -0,0 +1,3 @@ +#include "serial.h" + +const struct b_serial_format_ops z__b_bitcode_format_ops = {}; diff --git a/serial/include/blue/serial.h b/serial/include/blue/serial.h new file mode 100644 index 0000000..8db05db --- /dev/null +++ b/serial/include/blue/serial.h @@ -0,0 +1,34 @@ +#ifndef BLUELIB_SERIAL_H_ +#define BLUELIB_SERIAL_H_ + +#include +#include +#include + +struct b_object; + +typedef enum b_serial_format { + B_SERIAL_FORMAT_NONE = 0, + B_SERIAL_FORMAT_BITCODE, + B_SERIAL_FORMAT_JSON, +} b_serial_format; + +typedef enum b_serial_flags { + B_SERIAL_F_NONE = 0, + B_SERIAL_F_PRETTY = 0x01u, +} b_serial_flags; + +typedef struct b_serial_ctx b_serial_ctx; + +BLUE_API b_status b_serial_ctx_create(b_serial_ctx **out); +BLUE_API b_status b_serial_ctx_destroy(b_serial_ctx *ctx); + +BLUE_API b_status b_serial_ctx_serialise( + b_serial_ctx *ctx, b_serial_format fmt, struct b_object *src, + b_stream *dest, b_serial_flags flags); + +BLUE_API b_status b_serial_ctx_deserialise( + b_serial_ctx *ctx, b_serial_format fmt, b_stream *src, + struct b_object **dest, b_serial_flags flags); + +#endif diff --git a/serial/json.c b/serial/json.c new file mode 100644 index 0000000..c73e15e --- /dev/null +++ b/serial/json.c @@ -0,0 +1,3307 @@ +/* + Copyright (c) 2009-2017 Dave Gamble and cJSON contributors + + Permission is hereby granted, free of charge, to any person obtaining a copy + of this software and associated documentation files (the "Software"), to deal + in the Software without restriction, including without limitation the rights + to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + copies of the Software, and to permit persons to whom the Software is + furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be included in + all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + THE SOFTWARE. +*/ + +/* cJSON */ +/* JSON parser in C. */ + +/* disable warnings about old C89 functions in MSVC */ +#if !defined(_CRT_SECURE_NO_DEPRECATE) && defined(_MSC_VER) +#define _CRT_SECURE_NO_DEPRECATE +#endif + +#ifdef __GNUC__ +#pragma GCC visibility push(default) +#endif +#if defined(_MSC_VER) +#pragma warning(push) +/* disable warning about single line comments in system headers */ +#pragma warning(disable : 4001) +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef ENABLE_LOCALES +#include +#endif + +#if defined(_MSC_VER) +#pragma warning(pop) +#endif +#ifdef __GNUC__ +#pragma GCC visibility pop +#endif + +#include "json.h" +#include "serial.h" + +/* define our own boolean type */ +#ifdef true +#undef true +#endif +#define true ((cJSON_bool)1) + +#ifdef false +#undef false +#endif +#define false ((cJSON_bool)0) + +/* define isnan and isinf for ANSI C, if in C99 or above, isnan and isinf has been defined in math.h */ +#ifndef isinf +#define isinf(d) (isnan((d - d)) && !isnan(d)) +#endif +#ifndef isnan +#define isnan(d) (d != d) +#endif + +#ifndef NAN +#ifdef _WIN32 +#define NAN sqrt(-1.0) +#else +#define NAN 0.0 / 0.0 +#endif +#endif + +typedef struct { + const unsigned char *json; + size_t position; +} error; +static error global_error = {NULL, 0}; + +CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void) +{ + return (const char *)(global_error.json + global_error.position); +} + +CJSON_PUBLIC(char *) cJSON_GetStringValue(const cJSON *const item) +{ + if (!cJSON_IsString(item)) { + return NULL; + } + + return item->valuestring; +} + +CJSON_PUBLIC(double) cJSON_GetNumberValue(const cJSON *const item) +{ + if (!cJSON_IsNumber(item)) { + return (double)NAN; + } + + return item->valuedouble; +} + +/* This is a safeguard to prevent copy-pasters from using incompatible C and header files */ +#if (CJSON_VERSION_MAJOR != 1) || (CJSON_VERSION_MINOR != 7) \ + || (CJSON_VERSION_PATCH != 18) +#error cJSON.h and cJSON.c have different versions. Make sure that both have the same. +#endif + +CJSON_PUBLIC(const char *) cJSON_Version(void) +{ + static char version[15]; + sprintf(version, "%i.%i.%i", CJSON_VERSION_MAJOR, CJSON_VERSION_MINOR, + CJSON_VERSION_PATCH); + + return version; +} + +/* Case insensitive string comparison, doesn't consider two NULL pointers equal though */ +static int case_insensitive_strcmp( + const unsigned char *string1, const unsigned char *string2) +{ + if ((string1 == NULL) || (string2 == NULL)) { + return 1; + } + + if (string1 == string2) { + return 0; + } + + for (; tolower(*string1) == tolower(*string2); (void)string1++, string2++) { + if (*string1 == '\0') { + return 0; + } + } + + return tolower(*string1) - tolower(*string2); +} + +typedef struct internal_hooks { + void *(CJSON_CDECL *allocate)(size_t size); + void(CJSON_CDECL *deallocate)(void *pointer); + void *(CJSON_CDECL *reallocate)(void *pointer, size_t size); +} internal_hooks; + +#if defined(_MSC_VER) +/* work around MSVC error C2322: '...' address of dllimport '...' is not static */ +static void *CJSON_CDECL internal_malloc(size_t size) +{ + return malloc(size); +} +static void CJSON_CDECL internal_free(void *pointer) +{ + free(pointer); +} +static void *CJSON_CDECL internal_realloc(void *pointer, size_t size) +{ + return realloc(pointer, size); +} +#else +#define internal_malloc malloc +#define internal_free free +#define internal_realloc realloc +#endif + +/* strlen of character literals resolved at compile time */ +#define static_strlen(string_literal) (sizeof(string_literal) - sizeof("")) + +static internal_hooks global_hooks + = {internal_malloc, internal_free, internal_realloc}; + +static unsigned char *cJSON_strdup( + const unsigned char *string, const internal_hooks *const hooks) +{ + size_t length = 0; + unsigned char *copy = NULL; + + if (string == NULL) { + return NULL; + } + + length = strlen((const char *)string) + sizeof(""); + copy = (unsigned char *)hooks->allocate(length); + if (copy == NULL) { + return NULL; + } + memcpy(copy, string, length); + + return copy; +} + +CJSON_PUBLIC(void) cJSON_InitHooks(cJSON_Hooks *hooks) +{ + if (hooks == NULL) { + /* Reset hooks */ + global_hooks.allocate = malloc; + global_hooks.deallocate = free; + global_hooks.reallocate = realloc; + return; + } + + global_hooks.allocate = malloc; + if (hooks->malloc_fn != NULL) { + global_hooks.allocate = hooks->malloc_fn; + } + + global_hooks.deallocate = free; + if (hooks->free_fn != NULL) { + global_hooks.deallocate = hooks->free_fn; + } + + /* use realloc only if both free and malloc are used */ + global_hooks.reallocate = NULL; + if ((global_hooks.allocate == malloc) && (global_hooks.deallocate == free)) { + global_hooks.reallocate = realloc; + } +} + +/* Internal constructor. */ +static cJSON *cJSON_New_Item(const internal_hooks *const hooks) +{ + cJSON *node = (cJSON *)hooks->allocate(sizeof(cJSON)); + if (node) { + memset(node, '\0', sizeof(cJSON)); + } + + return node; +} + +/* Delete a cJSON structure. */ +CJSON_PUBLIC(void) cJSON_Delete(cJSON *item) +{ + cJSON *next = NULL; + while (item != NULL) { + next = item->next; + if (!(item->type & cJSON_IsReference) && (item->child != NULL)) { + cJSON_Delete(item->child); + } + if (!(item->type & cJSON_IsReference) + && (item->valuestring != NULL)) { + global_hooks.deallocate(item->valuestring); + item->valuestring = NULL; + } + if (!(item->type & cJSON_StringIsConst) && (item->string != NULL)) { + global_hooks.deallocate(item->string); + item->string = NULL; + } + global_hooks.deallocate(item); + item = next; + } +} + +/* get the decimal point character of the current locale */ +static unsigned char get_decimal_point(void) +{ +#ifdef ENABLE_LOCALES + struct lconv *lconv = localeconv(); + return (unsigned char)lconv->decimal_point[0]; +#else + return '.'; +#endif +} + +typedef struct { + const unsigned char *content; + size_t length; + size_t offset; + size_t depth; /* How deeply nested (in arrays/objects) is the input at the current offset. */ + internal_hooks hooks; +} parse_buffer; + +/* check if the given size is left to read in a given parse buffer (starting with 1) */ +#define can_read(buffer, size) \ + ((buffer != NULL) && (((buffer)->offset + size) <= (buffer)->length)) +/* check if the buffer can be accessed at the given index (starting with 0) */ +#define can_access_at_index(buffer, index) \ + ((buffer != NULL) && (((buffer)->offset + index) < (buffer)->length)) +#define cannot_access_at_index(buffer, index) \ + (!can_access_at_index(buffer, index)) +/* get a pointer to the buffer at the position */ +#define buffer_at_offset(buffer) ((buffer)->content + (buffer)->offset) + +/* Parse the input text to generate a number, and populate the result into item. */ +static cJSON_bool parse_number(cJSON *const item, parse_buffer *const input_buffer) +{ + double number = 0; + unsigned char *after_end = NULL; + unsigned char number_c_string[64]; + unsigned char decimal_point = get_decimal_point(); + size_t i = 0; + + if ((input_buffer == NULL) || (input_buffer->content == NULL)) { + return false; + } + + /* copy the number into a temporary buffer and replace '.' with the decimal point + * of the current locale (for strtod) + * This also takes care of '\0' not necessarily being available for marking the end of the input */ + for (i = 0; (i < (sizeof(number_c_string) - 1)) + && can_access_at_index(input_buffer, i); + i++) { + switch (buffer_at_offset(input_buffer)[i]) { + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + case '+': + case '-': + case 'e': + case 'E': + number_c_string[i] = buffer_at_offset(input_buffer)[i]; + break; + + case '.': + number_c_string[i] = decimal_point; + break; + + default: + goto loop_end; + } + } +loop_end: + number_c_string[i] = '\0'; + + number = strtod((const char *)number_c_string, (char **)&after_end); + if (number_c_string == after_end) { + return false; /* parse_error */ + } + + item->valuedouble = number; + + /* use saturation in case of overflow */ + if (number >= INT_MAX) { + item->valueint = INT_MAX; + } else if (number <= (double)INT_MIN) { + item->valueint = INT_MIN; + } else { + item->valueint = (int)number; + } + + item->type = cJSON_Number; + + input_buffer->offset += (size_t)(after_end - number_c_string); + return true; +} + +/* don't ask me, but the original cJSON_SetNumberValue returns an integer or double */ +CJSON_PUBLIC(double) cJSON_SetNumberHelper(cJSON *object, double number) +{ + if (number >= INT_MAX) { + object->valueint = INT_MAX; + } else if (number <= (double)INT_MIN) { + object->valueint = INT_MIN; + } else { + object->valueint = (int)number; + } + + return object->valuedouble = number; +} + +/* Note: when passing a NULL valuestring, cJSON_SetValuestring treats this as an error and return NULL */ +CJSON_PUBLIC(char *) +cJSON_SetValuestring(cJSON *object, const char *valuestring) +{ + char *copy = NULL; + /* if object's type is not cJSON_String or is cJSON_IsReference, it should not set valuestring */ + if ((object == NULL) || !(object->type & cJSON_String) + || (object->type & cJSON_IsReference)) { + return NULL; + } + /* return NULL if the object is corrupted or valuestring is NULL */ + if (object->valuestring == NULL || valuestring == NULL) { + return NULL; + } + if (strlen(valuestring) <= strlen(object->valuestring)) { + strcpy(object->valuestring, valuestring); + return object->valuestring; + } + copy = (char *)cJSON_strdup( + (const unsigned char *)valuestring, &global_hooks); + if (copy == NULL) { + return NULL; + } + if (object->valuestring != NULL) { + cJSON_free(object->valuestring); + } + object->valuestring = copy; + + return copy; +} + +typedef struct { + unsigned char *buffer; + size_t length; + size_t offset; + size_t depth; /* current nesting depth (for formatted printing) */ + cJSON_bool noalloc; + cJSON_bool format; /* is this print a formatted print */ + internal_hooks hooks; +} printbuffer; + +/* realloc printbuffer if necessary to have at least "needed" bytes more */ +static unsigned char *ensure(printbuffer *const p, size_t needed) +{ + unsigned char *newbuffer = NULL; + size_t newsize = 0; + + if ((p == NULL) || (p->buffer == NULL)) { + return NULL; + } + + if ((p->length > 0) && (p->offset >= p->length)) { + /* make sure that offset is valid */ + return NULL; + } + + if (needed > INT_MAX) { + /* sizes bigger than INT_MAX are currently not supported */ + return NULL; + } + + needed += p->offset + 1; + if (needed <= p->length) { + return p->buffer + p->offset; + } + + if (p->noalloc) { + return NULL; + } + + /* calculate new buffer size */ + if (needed > (INT_MAX / 2)) { + /* overflow of int, use INT_MAX if possible */ + if (needed <= INT_MAX) { + newsize = INT_MAX; + } else { + return NULL; + } + } else { + newsize = needed * 2; + } + + if (p->hooks.reallocate != NULL) { + /* reallocate with realloc if available */ + newbuffer = (unsigned char *)p->hooks.reallocate(p->buffer, newsize); + if (newbuffer == NULL) { + p->hooks.deallocate(p->buffer); + p->length = 0; + p->buffer = NULL; + + return NULL; + } + } else { + /* otherwise reallocate manually */ + newbuffer = (unsigned char *)p->hooks.allocate(newsize); + if (!newbuffer) { + p->hooks.deallocate(p->buffer); + p->length = 0; + p->buffer = NULL; + + return NULL; + } + + memcpy(newbuffer, p->buffer, p->offset + 1); + p->hooks.deallocate(p->buffer); + } + p->length = newsize; + p->buffer = newbuffer; + + return newbuffer + p->offset; +} + +/* calculate the new length of the string in a printbuffer and update the offset */ +static void update_offset(printbuffer *const buffer) +{ + const unsigned char *buffer_pointer = NULL; + if ((buffer == NULL) || (buffer->buffer == NULL)) { + return; + } + buffer_pointer = buffer->buffer + buffer->offset; + + buffer->offset += strlen((const char *)buffer_pointer); +} + +/* securely comparison of floating-point variables */ +static cJSON_bool compare_double(double a, double b) +{ + double maxVal = fabs(a) > fabs(b) ? fabs(a) : fabs(b); + return (fabs(a - b) <= maxVal * DBL_EPSILON); +} + +/* Render the number nicely from the given item into a string. */ +static cJSON_bool print_number( + const cJSON *const item, printbuffer *const output_buffer) +{ + unsigned char *output_pointer = NULL; + double d = item->valuedouble; + int length = 0; + size_t i = 0; + unsigned char number_buffer[26] + = {0}; /* temporary buffer to print the number into */ + unsigned char decimal_point = get_decimal_point(); + double test = 0.0; + + if (output_buffer == NULL) { + return false; + } + + /* This checks for NaN and Infinity */ + if (isnan(d) || isinf(d)) { + length = sprintf((char *)number_buffer, "null"); + } else if (d == (double)item->valueint) { + length = sprintf((char *)number_buffer, "%d", item->valueint); + } else { + /* Try 15 decimal places of precision to avoid nonsignificant nonzero digits */ + length = sprintf((char *)number_buffer, "%1.15g", d); + + /* Check whether the original double can be recovered */ + if ((sscanf((char *)number_buffer, "%lg", &test) != 1) + || !compare_double((double)test, d)) { + /* If not, print with 17 decimal places of precision */ + length = sprintf((char *)number_buffer, "%1.17g", d); + } + } + + /* sprintf failed or buffer overrun occurred */ + if ((length < 0) || (length > (int)(sizeof(number_buffer) - 1))) { + return false; + } + + /* reserve appropriate space in the output */ + output_pointer = ensure(output_buffer, (size_t)length + sizeof("")); + if (output_pointer == NULL) { + return false; + } + + /* copy the printed number to the output and replace locale + * dependent decimal point with '.' */ + for (i = 0; i < ((size_t)length); i++) { + if (number_buffer[i] == decimal_point) { + output_pointer[i] = '.'; + continue; + } + + output_pointer[i] = number_buffer[i]; + } + output_pointer[i] = '\0'; + + output_buffer->offset += (size_t)length; + + return true; +} + +/* parse 4 digit hexadecimal number */ +static unsigned parse_hex4(const unsigned char *const input) +{ + unsigned int h = 0; + size_t i = 0; + + for (i = 0; i < 4; i++) { + /* parse digit */ + if ((input[i] >= '0') && (input[i] <= '9')) { + h += (unsigned int)input[i] - '0'; + } else if ((input[i] >= 'A') && (input[i] <= 'F')) { + h += (unsigned int)10 + input[i] - 'A'; + } else if ((input[i] >= 'a') && (input[i] <= 'f')) { + h += (unsigned int)10 + input[i] - 'a'; + } else /* invalid */ + { + return 0; + } + + if (i < 3) { + /* shift left to make place for the next nibble */ + h = h << 4; + } + } + + return h; +} + +/* converts a UTF-16 literal to UTF-8 + * A literal can be one or two sequences of the form \uXXXX */ +static unsigned char utf16_literal_to_utf8( + const unsigned char *const input_pointer, + const unsigned char *const input_end, unsigned char **output_pointer) +{ + long unsigned int codepoint = 0; + unsigned int first_code = 0; + const unsigned char *first_sequence = input_pointer; + unsigned char utf8_length = 0; + unsigned char utf8_position = 0; + unsigned char sequence_length = 0; + unsigned char first_byte_mark = 0; + + if ((input_end - first_sequence) < 6) { + /* input ends unexpectedly */ + goto fail; + } + + /* get the first utf16 sequence */ + first_code = parse_hex4(first_sequence + 2); + + /* check that the code is valid */ + if (((first_code >= 0xDC00) && (first_code <= 0xDFFF))) { + goto fail; + } + + /* UTF16 surrogate pair */ + if ((first_code >= 0xD800) && (first_code <= 0xDBFF)) { + const unsigned char *second_sequence = first_sequence + 6; + unsigned int second_code = 0; + sequence_length = 12; /* \uXXXX\uXXXX */ + + if ((input_end - second_sequence) < 6) { + /* input ends unexpectedly */ + goto fail; + } + + if ((second_sequence[0] != '\\') || (second_sequence[1] != 'u')) { + /* missing second half of the surrogate pair */ + goto fail; + } + + /* get the second utf16 sequence */ + second_code = parse_hex4(second_sequence + 2); + /* check that the code is valid */ + if ((second_code < 0xDC00) || (second_code > 0xDFFF)) { + /* invalid second half of the surrogate pair */ + goto fail; + } + + /* calculate the unicode codepoint from the surrogate pair */ + codepoint = 0x10000 + + (((first_code & 0x3FF) << 10) | (second_code & 0x3FF)); + } else { + sequence_length = 6; /* \uXXXX */ + codepoint = first_code; + } + + /* encode as UTF-8 + * takes at maximum 4 bytes to encode: + * 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */ + if (codepoint < 0x80) { + /* normal ascii, encoding 0xxxxxxx */ + utf8_length = 1; + } else if (codepoint < 0x800) { + /* two bytes, encoding 110xxxxx 10xxxxxx */ + utf8_length = 2; + first_byte_mark = 0xC0; /* 11000000 */ + } else if (codepoint < 0x10000) { + /* three bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx */ + utf8_length = 3; + first_byte_mark = 0xE0; /* 11100000 */ + } else if (codepoint <= 0x10FFFF) { + /* four bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx 10xxxxxx */ + utf8_length = 4; + first_byte_mark = 0xF0; /* 11110000 */ + } else { + /* invalid unicode codepoint */ + goto fail; + } + + /* encode as utf8 */ + for (utf8_position = (unsigned char)(utf8_length - 1); + utf8_position > 0; utf8_position--) { + /* 10xxxxxx */ + (*output_pointer)[utf8_position] + = (unsigned char)((codepoint | 0x80) & 0xBF); + codepoint >>= 6; + } + /* encode first byte */ + if (utf8_length > 1) { + (*output_pointer)[0] + = (unsigned char)((codepoint | first_byte_mark) & 0xFF); + } else { + (*output_pointer)[0] = (unsigned char)(codepoint & 0x7F); + } + + *output_pointer += utf8_length; + + return sequence_length; + +fail: + return 0; +} + +/* Parse the input text into an unescaped cinput, and populate item. */ +static cJSON_bool parse_string(cJSON *const item, parse_buffer *const input_buffer) +{ + const unsigned char *input_pointer = buffer_at_offset(input_buffer) + 1; + const unsigned char *input_end = buffer_at_offset(input_buffer) + 1; + unsigned char *output_pointer = NULL; + unsigned char *output = NULL; + + /* not a string */ + if (buffer_at_offset(input_buffer)[0] != '\"') { + goto fail; + } + + { + /* calculate approximate size of the output (overestimate) */ + size_t allocation_length = 0; + size_t skipped_bytes = 0; + while (((size_t)(input_end - input_buffer->content) + < input_buffer->length) + && (*input_end != '\"')) { + /* is escape sequence */ + if (input_end[0] == '\\') { + if ((size_t)(input_end + 1 - input_buffer->content) + >= input_buffer->length) { + /* prevent buffer overflow when last input character is a backslash */ + goto fail; + } + skipped_bytes++; + input_end++; + } + input_end++; + } + if (((size_t)(input_end - input_buffer->content) + >= input_buffer->length) + || (*input_end != '\"')) { + goto fail; /* string ended unexpectedly */ + } + + /* This is at most how much we need for the output */ + allocation_length + = (size_t)(input_end - buffer_at_offset(input_buffer)) + - skipped_bytes; + output = (unsigned char *)input_buffer->hooks.allocate( + allocation_length + sizeof("")); + if (output == NULL) { + goto fail; /* allocation failure */ + } + } + + output_pointer = output; + /* loop through the string literal */ + while (input_pointer < input_end) { + if (*input_pointer != '\\') { + *output_pointer++ = *input_pointer++; + } + /* escape sequence */ + else { + unsigned char sequence_length = 2; + if ((input_end - input_pointer) < 1) { + goto fail; + } + + switch (input_pointer[1]) { + case 'b': + *output_pointer++ = '\b'; + break; + case 'f': + *output_pointer++ = '\f'; + break; + case 'n': + *output_pointer++ = '\n'; + break; + case 'r': + *output_pointer++ = '\r'; + break; + case 't': + *output_pointer++ = '\t'; + break; + case '\"': + case '\\': + case '/': + *output_pointer++ = input_pointer[1]; + break; + + /* UTF-16 literal */ + case 'u': + sequence_length = utf16_literal_to_utf8( + input_pointer, input_end, &output_pointer); + if (sequence_length == 0) { + /* failed to convert UTF16-literal to UTF-8 */ + goto fail; + } + break; + + default: + goto fail; + } + input_pointer += sequence_length; + } + } + + /* zero terminate the output */ + *output_pointer = '\0'; + + item->type = cJSON_String; + item->valuestring = (char *)output; + + input_buffer->offset = (size_t)(input_end - input_buffer->content); + input_buffer->offset++; + + return true; + +fail: + if (output != NULL) { + input_buffer->hooks.deallocate(output); + output = NULL; + } + + if (input_pointer != NULL) { + input_buffer->offset + = (size_t)(input_pointer - input_buffer->content); + } + + return false; +} + +/* Render the cstring provided to an escaped version that can be printed. */ +static cJSON_bool print_string_ptr( + const unsigned char *const input, printbuffer *const output_buffer) +{ + const unsigned char *input_pointer = NULL; + unsigned char *output = NULL; + unsigned char *output_pointer = NULL; + size_t output_length = 0; + /* numbers of additional characters needed for escaping */ + size_t escape_characters = 0; + + if (output_buffer == NULL) { + return false; + } + + /* empty string */ + if (input == NULL) { + output = ensure(output_buffer, sizeof("\"\"")); + if (output == NULL) { + return false; + } + strcpy((char *)output, "\"\""); + + return true; + } + + /* set "flag" to 1 if something needs to be escaped */ + for (input_pointer = input; *input_pointer; input_pointer++) { + switch (*input_pointer) { + case '\"': + case '\\': + case '\b': + case '\f': + case '\n': + case '\r': + case '\t': + /* one character escape sequence */ + escape_characters++; + break; + default: + if (*input_pointer < 32) { + /* UTF-16 escape sequence uXXXX */ + escape_characters += 5; + } + break; + } + } + output_length = (size_t)(input_pointer - input) + escape_characters; + + output = ensure(output_buffer, output_length + sizeof("\"\"")); + if (output == NULL) { + return false; + } + + /* no characters have to be escaped */ + if (escape_characters == 0) { + output[0] = '\"'; + memcpy(output + 1, input, output_length); + output[output_length + 1] = '\"'; + output[output_length + 2] = '\0'; + + return true; + } + + output[0] = '\"'; + output_pointer = output + 1; + /* copy the string */ + for (input_pointer = input; *input_pointer != '\0'; + (void)input_pointer++, output_pointer++) { + if ((*input_pointer > 31) && (*input_pointer != '\"') + && (*input_pointer != '\\')) { + /* normal character, copy */ + *output_pointer = *input_pointer; + } else { + /* character needs to be escaped */ + *output_pointer++ = '\\'; + switch (*input_pointer) { + case '\\': + *output_pointer = '\\'; + break; + case '\"': + *output_pointer = '\"'; + break; + case '\b': + *output_pointer = 'b'; + break; + case '\f': + *output_pointer = 'f'; + break; + case '\n': + *output_pointer = 'n'; + break; + case '\r': + *output_pointer = 'r'; + break; + case '\t': + *output_pointer = 't'; + break; + default: + /* escape and print as unicode codepoint */ + sprintf((char *)output_pointer, "u%04x", + *input_pointer); + output_pointer += 4; + break; + } + } + } + output[output_length + 1] = '\"'; + output[output_length + 2] = '\0'; + + return true; +} + +/* Invoke print_string_ptr (which is useful) on an item. */ +static cJSON_bool print_string(const cJSON *const item, printbuffer *const p) +{ + return print_string_ptr((unsigned char *)item->valuestring, p); +} + +/* Predeclare these prototypes. */ +static cJSON_bool parse_value(cJSON *const item, parse_buffer *const input_buffer); +static cJSON_bool print_value( + const cJSON *const item, printbuffer *const output_buffer); +static cJSON_bool parse_array(cJSON *const item, parse_buffer *const input_buffer); +static cJSON_bool print_array( + const cJSON *const item, printbuffer *const output_buffer); +static cJSON_bool parse_object(cJSON *const item, parse_buffer *const input_buffer); +static cJSON_bool print_object( + const cJSON *const item, printbuffer *const output_buffer); + +/* Utility to jump whitespace and cr/lf */ +static parse_buffer *buffer_skip_whitespace(parse_buffer *const buffer) +{ + if ((buffer == NULL) || (buffer->content == NULL)) { + return NULL; + } + + if (cannot_access_at_index(buffer, 0)) { + return buffer; + } + + while (can_access_at_index(buffer, 0) + && (buffer_at_offset(buffer)[0] <= 32)) { + buffer->offset++; + } + + if (buffer->offset == buffer->length) { + buffer->offset--; + } + + return buffer; +} + +/* skip the UTF-8 BOM (byte order mark) if it is at the beginning of a buffer */ +static parse_buffer *skip_utf8_bom(parse_buffer *const buffer) +{ + if ((buffer == NULL) || (buffer->content == NULL) || (buffer->offset != 0)) { + return NULL; + } + + if (can_access_at_index(buffer, 4) + && (strncmp((const char *)buffer_at_offset(buffer), "\xEF\xBB\xBF", 3) + == 0)) { + buffer->offset += 3; + } + + return buffer; +} + +CJSON_PUBLIC(cJSON *) +cJSON_ParseWithOpts( + const char *value, const char **return_parse_end, + cJSON_bool require_null_terminated) +{ + size_t buffer_length; + + if (NULL == value) { + return NULL; + } + + /* Adding null character size due to require_null_terminated. */ + buffer_length = strlen(value) + sizeof(""); + + return cJSON_ParseWithLengthOpts( + value, buffer_length, return_parse_end, require_null_terminated); +} + +/* Parse an object - create a new root, and populate. */ +CJSON_PUBLIC(cJSON *) +cJSON_ParseWithLengthOpts( + const char *value, size_t buffer_length, const char **return_parse_end, + cJSON_bool require_null_terminated) +{ + parse_buffer buffer = {0, 0, 0, 0, {0, 0, 0}}; + cJSON *item = NULL; + + /* reset error position */ + global_error.json = NULL; + global_error.position = 0; + + if (value == NULL || 0 == buffer_length) { + goto fail; + } + + buffer.content = (const unsigned char *)value; + buffer.length = buffer_length; + buffer.offset = 0; + buffer.hooks = global_hooks; + + item = cJSON_New_Item(&global_hooks); + if (item == NULL) /* memory fail */ + { + goto fail; + } + + if (!parse_value(item, buffer_skip_whitespace(skip_utf8_bom(&buffer)))) { + /* parse failure. ep is set. */ + goto fail; + } + + /* if we require null-terminated JSON without appended garbage, skip and then check for a null terminator */ + if (require_null_terminated) { + buffer_skip_whitespace(&buffer); + if ((buffer.offset >= buffer.length) + || buffer_at_offset(&buffer)[0] != '\0') { + goto fail; + } + } + if (return_parse_end) { + *return_parse_end = (const char *)buffer_at_offset(&buffer); + } + + return item; + +fail: + if (item != NULL) { + cJSON_Delete(item); + } + + if (value != NULL) { + error local_error; + local_error.json = (const unsigned char *)value; + local_error.position = 0; + + if (buffer.offset < buffer.length) { + local_error.position = buffer.offset; + } else if (buffer.length > 0) { + local_error.position = buffer.length - 1; + } + + if (return_parse_end != NULL) { + *return_parse_end = (const char *)local_error.json + + local_error.position; + } + + global_error = local_error; + } + + return NULL; +} + +/* Default options for cJSON_Parse */ +CJSON_PUBLIC(cJSON *) cJSON_Parse(const char *value) +{ + return cJSON_ParseWithOpts(value, 0, 0); +} + +CJSON_PUBLIC(cJSON *) +cJSON_ParseWithLength(const char *value, size_t buffer_length) +{ + return cJSON_ParseWithLengthOpts(value, buffer_length, 0, 0); +} + +#define cjson_min(a, b) (((a) < (b)) ? (a) : (b)) + +static unsigned char *print( + const cJSON *const item, cJSON_bool format, const internal_hooks *const hooks) +{ + static const size_t default_buffer_size = 256; + printbuffer buffer[1]; + unsigned char *printed = NULL; + + memset(buffer, 0, sizeof(buffer)); + + /* create buffer */ + buffer->buffer = (unsigned char *)hooks->allocate(default_buffer_size); + buffer->length = default_buffer_size; + buffer->format = format; + buffer->hooks = *hooks; + if (buffer->buffer == NULL) { + goto fail; + } + + /* print the value */ + if (!print_value(item, buffer)) { + goto fail; + } + update_offset(buffer); + + /* check if reallocate is available */ + if (hooks->reallocate != NULL) { + printed = (unsigned char *)hooks->reallocate( + buffer->buffer, buffer->offset + 1); + if (printed == NULL) { + goto fail; + } + buffer->buffer = NULL; + } else /* otherwise copy the JSON over to a new buffer */ + { + printed = (unsigned char *)hooks->allocate(buffer->offset + 1); + if (printed == NULL) { + goto fail; + } + memcpy(printed, buffer->buffer, + cjson_min(buffer->length, buffer->offset + 1)); + printed[buffer->offset] = '\0'; /* just to be sure */ + + /* free the buffer */ + hooks->deallocate(buffer->buffer); + buffer->buffer = NULL; + } + + return printed; + +fail: + if (buffer->buffer != NULL) { + hooks->deallocate(buffer->buffer); + buffer->buffer = NULL; + } + + if (printed != NULL) { + hooks->deallocate(printed); + printed = NULL; + } + + return NULL; +} + +/* Render a cJSON item/entity/structure to text. */ +CJSON_PUBLIC(char *) cJSON_Print(const cJSON *item) +{ + return (char *)print(item, true, &global_hooks); +} + +CJSON_PUBLIC(char *) cJSON_PrintUnformatted(const cJSON *item) +{ + return (char *)print(item, false, &global_hooks); +} + +CJSON_PUBLIC(char *) +cJSON_PrintBuffered(const cJSON *item, int prebuffer, cJSON_bool fmt) +{ + printbuffer p = {0, 0, 0, 0, 0, 0, {0, 0, 0}}; + + if (prebuffer < 0) { + return NULL; + } + + p.buffer = (unsigned char *)global_hooks.allocate((size_t)prebuffer); + if (!p.buffer) { + return NULL; + } + + p.length = (size_t)prebuffer; + p.offset = 0; + p.noalloc = false; + p.format = fmt; + p.hooks = global_hooks; + + if (!print_value(item, &p)) { + global_hooks.deallocate(p.buffer); + p.buffer = NULL; + return NULL; + } + + return (char *)p.buffer; +} + +CJSON_PUBLIC(cJSON_bool) +cJSON_PrintPreallocated( + cJSON *item, char *buffer, const int length, const cJSON_bool format) +{ + printbuffer p = {0, 0, 0, 0, 0, 0, {0, 0, 0}}; + + if ((length < 0) || (buffer == NULL)) { + return false; + } + + p.buffer = (unsigned char *)buffer; + p.length = (size_t)length; + p.offset = 0; + p.noalloc = true; + p.format = format; + p.hooks = global_hooks; + + return print_value(item, &p); +} + +/* Parser core - when encountering text, process appropriately. */ +static cJSON_bool parse_value(cJSON *const item, parse_buffer *const input_buffer) +{ + if ((input_buffer == NULL) || (input_buffer->content == NULL)) { + return false; /* no input */ + } + + /* parse the different types of values */ + /* null */ + if (can_read(input_buffer, 4) + && (strncmp((const char *)buffer_at_offset(input_buffer), "null", 4) + == 0)) { + item->type = cJSON_NULL; + input_buffer->offset += 4; + return true; + } + /* false */ + if (can_read(input_buffer, 5) + && (strncmp((const char *)buffer_at_offset(input_buffer), "false", 5) + == 0)) { + item->type = cJSON_False; + input_buffer->offset += 5; + return true; + } + /* true */ + if (can_read(input_buffer, 4) + && (strncmp((const char *)buffer_at_offset(input_buffer), "true", 4) + == 0)) { + item->type = cJSON_True; + item->valueint = 1; + input_buffer->offset += 4; + return true; + } + /* string */ + if (can_access_at_index(input_buffer, 0) + && (buffer_at_offset(input_buffer)[0] == '\"')) { + return parse_string(item, input_buffer); + } + /* number */ + if (can_access_at_index(input_buffer, 0) + && ((buffer_at_offset(input_buffer)[0] == '-') + || ((buffer_at_offset(input_buffer)[0] >= '0') + && (buffer_at_offset(input_buffer)[0] <= '9')))) { + return parse_number(item, input_buffer); + } + /* array */ + if (can_access_at_index(input_buffer, 0) + && (buffer_at_offset(input_buffer)[0] == '[')) { + return parse_array(item, input_buffer); + } + /* object */ + if (can_access_at_index(input_buffer, 0) + && (buffer_at_offset(input_buffer)[0] == '{')) { + return parse_object(item, input_buffer); + } + + return false; +} + +/* Render a value to text. */ +static cJSON_bool print_value( + const cJSON *const item, printbuffer *const output_buffer) +{ + unsigned char *output = NULL; + + if ((item == NULL) || (output_buffer == NULL)) { + return false; + } + + switch ((item->type) & 0xFF) { + case cJSON_NULL: + output = ensure(output_buffer, 5); + if (output == NULL) { + return false; + } + strcpy((char *)output, "null"); + return true; + + case cJSON_False: + output = ensure(output_buffer, 6); + if (output == NULL) { + return false; + } + strcpy((char *)output, "false"); + return true; + + case cJSON_True: + output = ensure(output_buffer, 5); + if (output == NULL) { + return false; + } + strcpy((char *)output, "true"); + return true; + + case cJSON_Number: + return print_number(item, output_buffer); + + case cJSON_Raw: { + size_t raw_length = 0; + if (item->valuestring == NULL) { + return false; + } + + raw_length = strlen(item->valuestring) + sizeof(""); + output = ensure(output_buffer, raw_length); + if (output == NULL) { + return false; + } + memcpy(output, item->valuestring, raw_length); + return true; + } + + case cJSON_String: + return print_string(item, output_buffer); + + case cJSON_Array: + return print_array(item, output_buffer); + + case cJSON_Object: + return print_object(item, output_buffer); + + default: + return false; + } +} + +/* Build an array from input text. */ +static cJSON_bool parse_array(cJSON *const item, parse_buffer *const input_buffer) +{ + cJSON *head = NULL; /* head of the linked list */ + cJSON *current_item = NULL; + + if (input_buffer->depth >= CJSON_NESTING_LIMIT) { + return false; /* to deeply nested */ + } + input_buffer->depth++; + + if (buffer_at_offset(input_buffer)[0] != '[') { + /* not an array */ + goto fail; + } + + input_buffer->offset++; + buffer_skip_whitespace(input_buffer); + if (can_access_at_index(input_buffer, 0) + && (buffer_at_offset(input_buffer)[0] == ']')) { + /* empty array */ + goto success; + } + + /* check if we skipped to the end of the buffer */ + if (cannot_access_at_index(input_buffer, 0)) { + input_buffer->offset--; + goto fail; + } + + /* step back to character in front of the first element */ + input_buffer->offset--; + /* loop through the comma separated array elements */ + do { + /* allocate next item */ + cJSON *new_item = cJSON_New_Item(&(input_buffer->hooks)); + if (new_item == NULL) { + goto fail; /* allocation failure */ + } + + /* attach next item to list */ + if (head == NULL) { + /* start the linked list */ + current_item = head = new_item; + } else { + /* add to the end and advance */ + current_item->next = new_item; + new_item->prev = current_item; + current_item = new_item; + } + + /* parse next value */ + input_buffer->offset++; + buffer_skip_whitespace(input_buffer); + if (!parse_value(current_item, input_buffer)) { + goto fail; /* failed to parse value */ + } + buffer_skip_whitespace(input_buffer); + } while (can_access_at_index(input_buffer, 0) + && (buffer_at_offset(input_buffer)[0] == ',')); + + if (cannot_access_at_index(input_buffer, 0) + || buffer_at_offset(input_buffer)[0] != ']') { + goto fail; /* expected end of array */ + } + +success: + input_buffer->depth--; + + if (head != NULL) { + head->prev = current_item; + } + + item->type = cJSON_Array; + item->child = head; + + input_buffer->offset++; + + return true; + +fail: + if (head != NULL) { + cJSON_Delete(head); + } + + return false; +} + +/* Render an array to text */ +static cJSON_bool print_array( + const cJSON *const item, printbuffer *const output_buffer) +{ + unsigned char *output_pointer = NULL; + size_t length = 0; + cJSON *current_element = item->child; + + if (output_buffer == NULL) { + return false; + } + + /* Compose the output array. */ + /* opening square bracket */ + output_pointer = ensure(output_buffer, 1); + if (output_pointer == NULL) { + return false; + } + + *output_pointer = '['; + output_buffer->offset++; + output_buffer->depth++; + + while (current_element != NULL) { + if (!print_value(current_element, output_buffer)) { + return false; + } + update_offset(output_buffer); + if (current_element->next) { + length = (size_t)(output_buffer->format ? 2 : 1); + output_pointer = ensure(output_buffer, length + 1); + if (output_pointer == NULL) { + return false; + } + *output_pointer++ = ','; + if (output_buffer->format) { + *output_pointer++ = ' '; + } + *output_pointer = '\0'; + output_buffer->offset += length; + } + current_element = current_element->next; + } + + output_pointer = ensure(output_buffer, 2); + if (output_pointer == NULL) { + return false; + } + *output_pointer++ = ']'; + *output_pointer = '\0'; + output_buffer->depth--; + + return true; +} + +/* Build an object from the text. */ +static cJSON_bool parse_object(cJSON *const item, parse_buffer *const input_buffer) +{ + cJSON *head = NULL; /* linked list head */ + cJSON *current_item = NULL; + + if (input_buffer->depth >= CJSON_NESTING_LIMIT) { + return false; /* to deeply nested */ + } + input_buffer->depth++; + + if (cannot_access_at_index(input_buffer, 0) + || (buffer_at_offset(input_buffer)[0] != '{')) { + goto fail; /* not an object */ + } + + input_buffer->offset++; + buffer_skip_whitespace(input_buffer); + if (can_access_at_index(input_buffer, 0) + && (buffer_at_offset(input_buffer)[0] == '}')) { + goto success; /* empty object */ + } + + /* check if we skipped to the end of the buffer */ + if (cannot_access_at_index(input_buffer, 0)) { + input_buffer->offset--; + goto fail; + } + + /* step back to character in front of the first element */ + input_buffer->offset--; + /* loop through the comma separated array elements */ + do { + /* allocate next item */ + cJSON *new_item = cJSON_New_Item(&(input_buffer->hooks)); + if (new_item == NULL) { + goto fail; /* allocation failure */ + } + + /* attach next item to list */ + if (head == NULL) { + /* start the linked list */ + current_item = head = new_item; + } else { + /* add to the end and advance */ + current_item->next = new_item; + new_item->prev = current_item; + current_item = new_item; + } + + if (cannot_access_at_index(input_buffer, 1)) { + goto fail; /* nothing comes after the comma */ + } + + /* parse the name of the child */ + input_buffer->offset++; + buffer_skip_whitespace(input_buffer); + if (!parse_string(current_item, input_buffer)) { + goto fail; /* failed to parse name */ + } + buffer_skip_whitespace(input_buffer); + + /* swap valuestring and string, because we parsed the name */ + current_item->string = current_item->valuestring; + current_item->valuestring = NULL; + + if (cannot_access_at_index(input_buffer, 0) + || (buffer_at_offset(input_buffer)[0] != ':')) { + goto fail; /* invalid object */ + } + + /* parse the value */ + input_buffer->offset++; + buffer_skip_whitespace(input_buffer); + if (!parse_value(current_item, input_buffer)) { + goto fail; /* failed to parse value */ + } + buffer_skip_whitespace(input_buffer); + } while (can_access_at_index(input_buffer, 0) + && (buffer_at_offset(input_buffer)[0] == ',')); + + if (cannot_access_at_index(input_buffer, 0) + || (buffer_at_offset(input_buffer)[0] != '}')) { + goto fail; /* expected end of object */ + } + +success: + input_buffer->depth--; + + if (head != NULL) { + head->prev = current_item; + } + + item->type = cJSON_Object; + item->child = head; + + input_buffer->offset++; + return true; + +fail: + if (head != NULL) { + cJSON_Delete(head); + } + + return false; +} + +/* Render an object to text. */ +static cJSON_bool print_object( + const cJSON *const item, printbuffer *const output_buffer) +{ + unsigned char *output_pointer = NULL; + size_t length = 0; + cJSON *current_item = item->child; + + if (output_buffer == NULL) { + return false; + } + + /* Compose the output: */ + length = (size_t)(output_buffer->format ? 2 : 1); /* fmt: {\n */ + output_pointer = ensure(output_buffer, length + 1); + if (output_pointer == NULL) { + return false; + } + + *output_pointer++ = '{'; + output_buffer->depth++; + if (output_buffer->format) { + *output_pointer++ = '\n'; + } + output_buffer->offset += length; + + while (current_item) { + if (output_buffer->format) { + size_t i; + output_pointer + = ensure(output_buffer, output_buffer->depth); + if (output_pointer == NULL) { + return false; + } + for (i = 0; i < output_buffer->depth; i++) { + *output_pointer++ = '\t'; + } + output_buffer->offset += output_buffer->depth; + } + + /* print key */ + if (!print_string_ptr( + (unsigned char *)current_item->string, output_buffer)) { + return false; + } + update_offset(output_buffer); + + length = (size_t)(output_buffer->format ? 2 : 1); + output_pointer = ensure(output_buffer, length); + if (output_pointer == NULL) { + return false; + } + *output_pointer++ = ':'; + if (output_buffer->format) { + *output_pointer++ = '\t'; + } + output_buffer->offset += length; + + /* print value */ + if (!print_value(current_item, output_buffer)) { + return false; + } + update_offset(output_buffer); + + /* print comma if not last */ + length + = ((size_t)(output_buffer->format ? 1 : 0) + + (size_t)(current_item->next ? 1 : 0)); + output_pointer = ensure(output_buffer, length + 1); + if (output_pointer == NULL) { + return false; + } + if (current_item->next) { + *output_pointer++ = ','; + } + + if (output_buffer->format) { + *output_pointer++ = '\n'; + } + *output_pointer = '\0'; + output_buffer->offset += length; + + current_item = current_item->next; + } + + output_pointer = ensure( + output_buffer, + output_buffer->format ? (output_buffer->depth + 1) : 2); + if (output_pointer == NULL) { + return false; + } + if (output_buffer->format) { + size_t i; + for (i = 0; i < (output_buffer->depth - 1); i++) { + *output_pointer++ = '\t'; + } + } + *output_pointer++ = '}'; + *output_pointer = '\0'; + output_buffer->depth--; + + return true; +} + +/* Get Array size/item / object item. */ +CJSON_PUBLIC(int) cJSON_GetArraySize(const cJSON *array) +{ + cJSON *child = NULL; + size_t size = 0; + + if (array == NULL) { + return 0; + } + + child = array->child; + + while (child != NULL) { + size++; + child = child->next; + } + + /* FIXME: Can overflow here. Cannot be fixed without breaking the API */ + + return (int)size; +} + +static cJSON *get_array_item(const cJSON *array, size_t index) +{ + cJSON *current_child = NULL; + + if (array == NULL) { + return NULL; + } + + current_child = array->child; + while ((current_child != NULL) && (index > 0)) { + index--; + current_child = current_child->next; + } + + return current_child; +} + +CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int index) +{ + if (index < 0) { + return NULL; + } + + return get_array_item(array, (size_t)index); +} + +static cJSON *get_object_item( + const cJSON *const object, const char *const name, + const cJSON_bool case_sensitive) +{ + cJSON *current_element = NULL; + + if ((object == NULL) || (name == NULL)) { + return NULL; + } + + current_element = object->child; + if (case_sensitive) { + while ((current_element != NULL) && (current_element->string != NULL) + && (strcmp(name, current_element->string) != 0)) { + current_element = current_element->next; + } + } else { + while ((current_element != NULL) + && (case_insensitive_strcmp( + (const unsigned char *)name, + (const unsigned char *)(current_element->string)) + != 0)) { + current_element = current_element->next; + } + } + + if ((current_element == NULL) || (current_element->string == NULL)) { + return NULL; + } + + return current_element; +} + +CJSON_PUBLIC(cJSON *) +cJSON_GetObjectItem(const cJSON *const object, const char *const string) +{ + return get_object_item(object, string, false); +} + +CJSON_PUBLIC(cJSON *) +cJSON_GetObjectItemCaseSensitive(const cJSON *const object, const char *const string) +{ + return get_object_item(object, string, true); +} + +CJSON_PUBLIC(cJSON_bool) +cJSON_HasObjectItem(const cJSON *object, const char *string) +{ + return cJSON_GetObjectItem(object, string) ? 1 : 0; +} + +/* Utility for array list handling. */ +static void suffix_object(cJSON *prev, cJSON *item) +{ + prev->next = item; + item->prev = prev; +} + +/* Utility for handling references. */ +static cJSON *create_reference(const cJSON *item, const internal_hooks *const hooks) +{ + cJSON *reference = NULL; + if (item == NULL) { + return NULL; + } + + reference = cJSON_New_Item(hooks); + if (reference == NULL) { + return NULL; + } + + memcpy(reference, item, sizeof(cJSON)); + reference->string = NULL; + reference->type |= cJSON_IsReference; + reference->next = reference->prev = NULL; + return reference; +} + +static cJSON_bool add_item_to_array(cJSON *array, cJSON *item) +{ + cJSON *child = NULL; + + if ((item == NULL) || (array == NULL) || (array == item)) { + return false; + } + + child = array->child; + /* + * To find the last item in array quickly, we use prev in array + */ + if (child == NULL) { + /* list is empty, start new one */ + array->child = item; + item->prev = item; + item->next = NULL; + } else { + /* append to the end */ + if (child->prev) { + suffix_object(child->prev, item); + array->child->prev = item; + } + } + + return true; +} + +/* Add item to array/object. */ +CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToArray(cJSON *array, cJSON *item) +{ + return add_item_to_array(array, item); +} + +#if defined(__clang__) \ + || (defined(__GNUC__) \ + && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 5)))) +#pragma GCC diagnostic push +#endif +#ifdef __GNUC__ +#pragma GCC diagnostic ignored "-Wcast-qual" +#endif +/* helper function to cast away const */ +static void *cast_away_const(const void *string) +{ + return (void *)string; +} +#if defined(__clang__) \ + || (defined(__GNUC__) \ + && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 5)))) +#pragma GCC diagnostic pop +#endif + +static cJSON_bool add_item_to_object( + cJSON *const object, const char *const string, cJSON *const item, + const internal_hooks *const hooks, const cJSON_bool constant_key) +{ + char *new_key = NULL; + int new_type = cJSON_Invalid; + + if ((object == NULL) || (string == NULL) || (item == NULL) + || (object == item)) { + return false; + } + + if (constant_key) { + new_key = (char *)cast_away_const(string); + new_type = item->type | cJSON_StringIsConst; + } else { + new_key = (char *)cJSON_strdup((const unsigned char *)string, hooks); + if (new_key == NULL) { + return false; + } + + new_type = item->type & ~cJSON_StringIsConst; + } + + if (!(item->type & cJSON_StringIsConst) && (item->string != NULL)) { + hooks->deallocate(item->string); + } + + item->string = new_key; + item->type = new_type; + + return add_item_to_array(object, item); +} + +CJSON_PUBLIC(cJSON_bool) +cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item) +{ + return add_item_to_object(object, string, item, &global_hooks, false); +} + +/* Add an item to an object with constant string as key */ +CJSON_PUBLIC(cJSON_bool) +cJSON_AddItemToObjectCS(cJSON *object, const char *string, cJSON *item) +{ + return add_item_to_object(object, string, item, &global_hooks, true); +} + +CJSON_PUBLIC(cJSON_bool) +cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item) +{ + if (array == NULL) { + return false; + } + + return add_item_to_array(array, create_reference(item, &global_hooks)); +} + +CJSON_PUBLIC(cJSON_bool) +cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item) +{ + if ((object == NULL) || (string == NULL)) { + return false; + } + + return add_item_to_object( + object, string, create_reference(item, &global_hooks), + &global_hooks, false); +} + +CJSON_PUBLIC(cJSON *) +cJSON_AddNullToObject(cJSON *const object, const char *const name) +{ + cJSON *null = cJSON_CreateNull(); + if (add_item_to_object(object, name, null, &global_hooks, false)) { + return null; + } + + cJSON_Delete(null); + return NULL; +} + +CJSON_PUBLIC(cJSON *) +cJSON_AddTrueToObject(cJSON *const object, const char *const name) +{ + cJSON *true_item = cJSON_CreateTrue(); + if (add_item_to_object(object, name, true_item, &global_hooks, false)) { + return true_item; + } + + cJSON_Delete(true_item); + return NULL; +} + +CJSON_PUBLIC(cJSON *) +cJSON_AddFalseToObject(cJSON *const object, const char *const name) +{ + cJSON *false_item = cJSON_CreateFalse(); + if (add_item_to_object(object, name, false_item, &global_hooks, false)) { + return false_item; + } + + cJSON_Delete(false_item); + return NULL; +} + +CJSON_PUBLIC(cJSON *) +cJSON_AddBoolToObject( + cJSON *const object, const char *const name, const cJSON_bool boolean) +{ + cJSON *bool_item = cJSON_CreateBool(boolean); + if (add_item_to_object(object, name, bool_item, &global_hooks, false)) { + return bool_item; + } + + cJSON_Delete(bool_item); + return NULL; +} + +CJSON_PUBLIC(cJSON *) +cJSON_AddNumberToObject( + cJSON *const object, const char *const name, const double number) +{ + cJSON *number_item = cJSON_CreateNumber(number); + if (add_item_to_object(object, name, number_item, &global_hooks, false)) { + return number_item; + } + + cJSON_Delete(number_item); + return NULL; +} + +CJSON_PUBLIC(cJSON *) +cJSON_AddStringToObject( + cJSON *const object, const char *const name, const char *const string) +{ + cJSON *string_item = cJSON_CreateString(string); + if (add_item_to_object(object, name, string_item, &global_hooks, false)) { + return string_item; + } + + cJSON_Delete(string_item); + return NULL; +} + +CJSON_PUBLIC(cJSON *) +cJSON_AddRawToObject( + cJSON *const object, const char *const name, const char *const raw) +{ + cJSON *raw_item = cJSON_CreateRaw(raw); + if (add_item_to_object(object, name, raw_item, &global_hooks, false)) { + return raw_item; + } + + cJSON_Delete(raw_item); + return NULL; +} + +CJSON_PUBLIC(cJSON *) +cJSON_AddObjectToObject(cJSON *const object, const char *const name) +{ + cJSON *object_item = cJSON_CreateObject(); + if (add_item_to_object(object, name, object_item, &global_hooks, false)) { + return object_item; + } + + cJSON_Delete(object_item); + return NULL; +} + +CJSON_PUBLIC(cJSON *) +cJSON_AddArrayToObject(cJSON *const object, const char *const name) +{ + cJSON *array = cJSON_CreateArray(); + if (add_item_to_object(object, name, array, &global_hooks, false)) { + return array; + } + + cJSON_Delete(array); + return NULL; +} + +CJSON_PUBLIC(cJSON *) +cJSON_DetachItemViaPointer(cJSON *parent, cJSON *const item) +{ + if ((parent == NULL) || (item == NULL)) { + return NULL; + } + + if (item != parent->child) { + /* not the first element */ + item->prev->next = item->next; + } + if (item->next != NULL) { + /* not the last element */ + item->next->prev = item->prev; + } + + if (item == parent->child) { + /* first element */ + parent->child = item->next; + } else if (item->next == NULL) { + /* last element */ + parent->child->prev = item->prev; + } + + /* make sure the detached item doesn't point anywhere anymore */ + item->prev = NULL; + item->next = NULL; + + return item; +} + +CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromArray(cJSON *array, int which) +{ + if (which < 0) { + return NULL; + } + + return cJSON_DetachItemViaPointer( + array, get_array_item(array, (size_t)which)); +} + +CJSON_PUBLIC(void) cJSON_DeleteItemFromArray(cJSON *array, int which) +{ + cJSON_Delete(cJSON_DetachItemFromArray(array, which)); +} + +CJSON_PUBLIC(cJSON *) +cJSON_DetachItemFromObject(cJSON *object, const char *string) +{ + cJSON *to_detach = cJSON_GetObjectItem(object, string); + + return cJSON_DetachItemViaPointer(object, to_detach); +} + +CJSON_PUBLIC(cJSON *) +cJSON_DetachItemFromObjectCaseSensitive(cJSON *object, const char *string) +{ + cJSON *to_detach = cJSON_GetObjectItemCaseSensitive(object, string); + + return cJSON_DetachItemViaPointer(object, to_detach); +} + +CJSON_PUBLIC(void) cJSON_DeleteItemFromObject(cJSON *object, const char *string) +{ + cJSON_Delete(cJSON_DetachItemFromObject(object, string)); +} + +CJSON_PUBLIC(void) +cJSON_DeleteItemFromObjectCaseSensitive(cJSON *object, const char *string) +{ + cJSON_Delete(cJSON_DetachItemFromObjectCaseSensitive(object, string)); +} + +/* Replace array/object items with new ones. */ +CJSON_PUBLIC(cJSON_bool) +cJSON_InsertItemInArray(cJSON *array, int which, cJSON *newitem) +{ + cJSON *after_inserted = NULL; + + if (which < 0 || newitem == NULL) { + return false; + } + + after_inserted = get_array_item(array, (size_t)which); + if (after_inserted == NULL) { + return add_item_to_array(array, newitem); + } + + if (after_inserted != array->child && after_inserted->prev == NULL) { + /* return false if after_inserted is a corrupted array item */ + return false; + } + + newitem->next = after_inserted; + newitem->prev = after_inserted->prev; + after_inserted->prev = newitem; + if (after_inserted == array->child) { + array->child = newitem; + } else { + newitem->prev->next = newitem; + } + return true; +} + +CJSON_PUBLIC(cJSON_bool) +cJSON_ReplaceItemViaPointer( + cJSON *const parent, cJSON *const item, cJSON *replacement) +{ + if ((parent == NULL) || (parent->child == NULL) || (replacement == NULL) + || (item == NULL)) { + return false; + } + + if (replacement == item) { + return true; + } + + replacement->next = item->next; + replacement->prev = item->prev; + + if (replacement->next != NULL) { + replacement->next->prev = replacement; + } + if (parent->child == item) { + if (parent->child->prev == parent->child) { + replacement->prev = replacement; + } + parent->child = replacement; + } else { /* + * To find the last item in array quickly, we use prev in array. + * We can't modify the last item's next pointer where this item was the parent's child + */ + if (replacement->prev != NULL) { + replacement->prev->next = replacement; + } + if (replacement->next == NULL) { + parent->child->prev = replacement; + } + } + + item->next = NULL; + item->prev = NULL; + cJSON_Delete(item); + + return true; +} + +CJSON_PUBLIC(cJSON_bool) +cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem) +{ + if (which < 0) { + return false; + } + + return cJSON_ReplaceItemViaPointer( + array, get_array_item(array, (size_t)which), newitem); +} + +static cJSON_bool replace_item_in_object( + cJSON *object, const char *string, cJSON *replacement, + cJSON_bool case_sensitive) +{ + if ((replacement == NULL) || (string == NULL)) { + return false; + } + + /* replace the name in the replacement */ + if (!(replacement->type & cJSON_StringIsConst) + && (replacement->string != NULL)) { + cJSON_free(replacement->string); + } + replacement->string = (char *)cJSON_strdup( + (const unsigned char *)string, &global_hooks); + if (replacement->string == NULL) { + return false; + } + + replacement->type &= ~cJSON_StringIsConst; + + return cJSON_ReplaceItemViaPointer( + object, get_object_item(object, string, case_sensitive), + replacement); +} + +CJSON_PUBLIC(cJSON_bool) +cJSON_ReplaceItemInObject(cJSON *object, const char *string, cJSON *newitem) +{ + return replace_item_in_object(object, string, newitem, false); +} + +CJSON_PUBLIC(cJSON_bool) +cJSON_ReplaceItemInObjectCaseSensitive( + cJSON *object, const char *string, cJSON *newitem) +{ + return replace_item_in_object(object, string, newitem, true); +} + +/* Create basic types: */ +CJSON_PUBLIC(cJSON *) cJSON_CreateNull(void) +{ + cJSON *item = cJSON_New_Item(&global_hooks); + if (item) { + item->type = cJSON_NULL; + } + + return item; +} + +CJSON_PUBLIC(cJSON *) cJSON_CreateTrue(void) +{ + cJSON *item = cJSON_New_Item(&global_hooks); + if (item) { + item->type = cJSON_True; + } + + return item; +} + +CJSON_PUBLIC(cJSON *) cJSON_CreateFalse(void) +{ + cJSON *item = cJSON_New_Item(&global_hooks); + if (item) { + item->type = cJSON_False; + } + + return item; +} + +CJSON_PUBLIC(cJSON *) cJSON_CreateBool(cJSON_bool boolean) +{ + cJSON *item = cJSON_New_Item(&global_hooks); + if (item) { + item->type = boolean ? cJSON_True : cJSON_False; + } + + return item; +} + +CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num) +{ + cJSON *item = cJSON_New_Item(&global_hooks); + if (item) { + item->type = cJSON_Number; + item->valuedouble = num; + + /* use saturation in case of overflow */ + if (num >= INT_MAX) { + item->valueint = INT_MAX; + } else if (num <= (double)INT_MIN) { + item->valueint = INT_MIN; + } else { + item->valueint = (int)num; + } + } + + return item; +} + +CJSON_PUBLIC(cJSON *) cJSON_CreateString(const char *string) +{ + cJSON *item = cJSON_New_Item(&global_hooks); + if (item) { + item->type = cJSON_String; + item->valuestring = (char *)cJSON_strdup( + (const unsigned char *)string, &global_hooks); + if (!item->valuestring) { + cJSON_Delete(item); + return NULL; + } + } + + return item; +} + +CJSON_PUBLIC(cJSON *) cJSON_CreateStringReference(const char *string) +{ + cJSON *item = cJSON_New_Item(&global_hooks); + if (item != NULL) { + item->type = cJSON_String | cJSON_IsReference; + item->valuestring = (char *)cast_away_const(string); + } + + return item; +} + +CJSON_PUBLIC(cJSON *) cJSON_CreateObjectReference(const cJSON *child) +{ + cJSON *item = cJSON_New_Item(&global_hooks); + if (item != NULL) { + item->type = cJSON_Object | cJSON_IsReference; + item->child = (cJSON *)cast_away_const(child); + } + + return item; +} + +CJSON_PUBLIC(cJSON *) cJSON_CreateArrayReference(const cJSON *child) +{ + cJSON *item = cJSON_New_Item(&global_hooks); + if (item != NULL) { + item->type = cJSON_Array | cJSON_IsReference; + item->child = (cJSON *)cast_away_const(child); + } + + return item; +} + +CJSON_PUBLIC(cJSON *) cJSON_CreateRaw(const char *raw) +{ + cJSON *item = cJSON_New_Item(&global_hooks); + if (item) { + item->type = cJSON_Raw; + item->valuestring = (char *)cJSON_strdup( + (const unsigned char *)raw, &global_hooks); + if (!item->valuestring) { + cJSON_Delete(item); + return NULL; + } + } + + return item; +} + +CJSON_PUBLIC(cJSON *) cJSON_CreateArray(void) +{ + cJSON *item = cJSON_New_Item(&global_hooks); + if (item) { + item->type = cJSON_Array; + } + + return item; +} + +CJSON_PUBLIC(cJSON *) cJSON_CreateObject(void) +{ + cJSON *item = cJSON_New_Item(&global_hooks); + if (item) { + item->type = cJSON_Object; + } + + return item; +} + +/* Create Arrays: */ +CJSON_PUBLIC(cJSON *) cJSON_CreateIntArray(const int *numbers, int count) +{ + size_t i = 0; + cJSON *n = NULL; + cJSON *p = NULL; + cJSON *a = NULL; + + if ((count < 0) || (numbers == NULL)) { + return NULL; + } + + a = cJSON_CreateArray(); + + for (i = 0; a && (i < (size_t)count); i++) { + n = cJSON_CreateNumber(numbers[i]); + if (!n) { + cJSON_Delete(a); + return NULL; + } + if (!i) { + a->child = n; + } else { + suffix_object(p, n); + } + p = n; + } + + if (a && a->child) { + a->child->prev = n; + } + + return a; +} + +CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count) +{ + size_t i = 0; + cJSON *n = NULL; + cJSON *p = NULL; + cJSON *a = NULL; + + if ((count < 0) || (numbers == NULL)) { + return NULL; + } + + a = cJSON_CreateArray(); + + for (i = 0; a && (i < (size_t)count); i++) { + n = cJSON_CreateNumber((double)numbers[i]); + if (!n) { + cJSON_Delete(a); + return NULL; + } + if (!i) { + a->child = n; + } else { + suffix_object(p, n); + } + p = n; + } + + if (a && a->child) { + a->child->prev = n; + } + + return a; +} + +CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const double *numbers, int count) +{ + size_t i = 0; + cJSON *n = NULL; + cJSON *p = NULL; + cJSON *a = NULL; + + if ((count < 0) || (numbers == NULL)) { + return NULL; + } + + a = cJSON_CreateArray(); + + for (i = 0; a && (i < (size_t)count); i++) { + n = cJSON_CreateNumber(numbers[i]); + if (!n) { + cJSON_Delete(a); + return NULL; + } + if (!i) { + a->child = n; + } else { + suffix_object(p, n); + } + p = n; + } + + if (a && a->child) { + a->child->prev = n; + } + + return a; +} + +CJSON_PUBLIC(cJSON *) +cJSON_CreateStringArray(const char *const *strings, int count) +{ + size_t i = 0; + cJSON *n = NULL; + cJSON *p = NULL; + cJSON *a = NULL; + + if ((count < 0) || (strings == NULL)) { + return NULL; + } + + a = cJSON_CreateArray(); + + for (i = 0; a && (i < (size_t)count); i++) { + n = cJSON_CreateString(strings[i]); + if (!n) { + cJSON_Delete(a); + return NULL; + } + if (!i) { + a->child = n; + } else { + suffix_object(p, n); + } + p = n; + } + + if (a && a->child) { + a->child->prev = n; + } + + return a; +} + +/* Duplication */ +CJSON_PUBLIC(cJSON *) cJSON_Duplicate(const cJSON *item, cJSON_bool recurse) +{ + cJSON *newitem = NULL; + cJSON *child = NULL; + cJSON *next = NULL; + cJSON *newchild = NULL; + + /* Bail on bad ptr */ + if (!item) { + goto fail; + } + /* Create new item */ + newitem = cJSON_New_Item(&global_hooks); + if (!newitem) { + goto fail; + } + /* Copy over all vars */ + newitem->type = item->type & (~cJSON_IsReference); + newitem->valueint = item->valueint; + newitem->valuedouble = item->valuedouble; + if (item->valuestring) { + newitem->valuestring = (char *)cJSON_strdup( + (unsigned char *)item->valuestring, &global_hooks); + if (!newitem->valuestring) { + goto fail; + } + } + if (item->string) { + newitem->string = (item->type & cJSON_StringIsConst) + ? item->string + : (char *)cJSON_strdup( + (unsigned char *)item->string, + &global_hooks); + if (!newitem->string) { + goto fail; + } + } + /* If non-recursive, then we're done! */ + if (!recurse) { + return newitem; + } + /* Walk the ->next chain for the child. */ + child = item->child; + while (child != NULL) { + newchild = cJSON_Duplicate( + child, + true); /* Duplicate (with recurse) each item in the ->next chain */ + if (!newchild) { + goto fail; + } + if (next != NULL) { + /* If newitem->child already set, then crosswire ->prev and ->next and move on */ + next->next = newchild; + newchild->prev = next; + next = newchild; + } else { + /* Set newitem->child and move to it */ + newitem->child = newchild; + next = newchild; + } + child = child->next; + } + if (newitem && newitem->child) { + newitem->child->prev = newchild; + } + + return newitem; + +fail: + if (newitem != NULL) { + cJSON_Delete(newitem); + } + + return NULL; +} + +static void skip_oneline_comment(char **input) +{ + *input += static_strlen("//"); + + for (; (*input)[0] != '\0'; ++(*input)) { + if ((*input)[0] == '\n') { + *input += static_strlen("\n"); + return; + } + } +} + +static void skip_multiline_comment(char **input) +{ + *input += static_strlen("/*"); + + for (; (*input)[0] != '\0'; ++(*input)) { + if (((*input)[0] == '*') && ((*input)[1] == '/')) { + *input += static_strlen("*/"); + return; + } + } +} + +static void minify_string(char **input, char **output) +{ + (*output)[0] = (*input)[0]; + *input += static_strlen("\""); + *output += static_strlen("\""); + + for (; (*input)[0] != '\0'; (void)++(*input), ++(*output)) { + (*output)[0] = (*input)[0]; + + if ((*input)[0] == '\"') { + (*output)[0] = '\"'; + *input += static_strlen("\""); + *output += static_strlen("\""); + return; + } else if (((*input)[0] == '\\') && ((*input)[1] == '\"')) { + (*output)[1] = (*input)[1]; + *input += static_strlen("\""); + *output += static_strlen("\""); + } + } +} + +CJSON_PUBLIC(void) cJSON_Minify(char *json) +{ + char *into = json; + + if (json == NULL) { + return; + } + + while (json[0] != '\0') { + switch (json[0]) { + case ' ': + case '\t': + case '\r': + case '\n': + json++; + break; + + case '/': + if (json[1] == '/') { + skip_oneline_comment(&json); + } else if (json[1] == '*') { + skip_multiline_comment(&json); + } else { + json++; + } + break; + + case '\"': + minify_string(&json, (char **)&into); + break; + + default: + into[0] = json[0]; + json++; + into++; + } + } + + /* and null-terminate. */ + *into = '\0'; +} + +CJSON_PUBLIC(cJSON_bool) cJSON_IsInvalid(const cJSON *const item) +{ + if (item == NULL) { + return false; + } + + return (item->type & 0xFF) == cJSON_Invalid; +} + +CJSON_PUBLIC(cJSON_bool) cJSON_IsFalse(const cJSON *const item) +{ + if (item == NULL) { + return false; + } + + return (item->type & 0xFF) == cJSON_False; +} + +CJSON_PUBLIC(cJSON_bool) cJSON_IsTrue(const cJSON *const item) +{ + if (item == NULL) { + return false; + } + + return (item->type & 0xff) == cJSON_True; +} + +CJSON_PUBLIC(cJSON_bool) cJSON_IsBool(const cJSON *const item) +{ + if (item == NULL) { + return false; + } + + return (item->type & (cJSON_True | cJSON_False)) != 0; +} +CJSON_PUBLIC(cJSON_bool) cJSON_IsNull(const cJSON *const item) +{ + if (item == NULL) { + return false; + } + + return (item->type & 0xFF) == cJSON_NULL; +} + +CJSON_PUBLIC(cJSON_bool) cJSON_IsNumber(const cJSON *const item) +{ + if (item == NULL) { + return false; + } + + return (item->type & 0xFF) == cJSON_Number; +} + +CJSON_PUBLIC(cJSON_bool) cJSON_IsString(const cJSON *const item) +{ + if (item == NULL) { + return false; + } + + return (item->type & 0xFF) == cJSON_String; +} + +CJSON_PUBLIC(cJSON_bool) cJSON_IsArray(const cJSON *const item) +{ + if (item == NULL) { + return false; + } + + return (item->type & 0xFF) == cJSON_Array; +} + +CJSON_PUBLIC(cJSON_bool) cJSON_IsObject(const cJSON *const item) +{ + if (item == NULL) { + return false; + } + + return (item->type & 0xFF) == cJSON_Object; +} + +CJSON_PUBLIC(cJSON_bool) cJSON_IsRaw(const cJSON *const item) +{ + if (item == NULL) { + return false; + } + + return (item->type & 0xFF) == cJSON_Raw; +} + +CJSON_PUBLIC(cJSON_bool) +cJSON_Compare(const cJSON *const a, const cJSON *const b, const cJSON_bool case_sensitive) +{ + if ((a == NULL) || (b == NULL) || ((a->type & 0xFF) != (b->type & 0xFF))) { + return false; + } + + /* check if type is valid */ + switch (a->type & 0xFF) { + case cJSON_False: + case cJSON_True: + case cJSON_NULL: + case cJSON_Number: + case cJSON_String: + case cJSON_Raw: + case cJSON_Array: + case cJSON_Object: + break; + + default: + return false; + } + + /* identical objects are equal */ + if (a == b) { + return true; + } + + switch (a->type & 0xFF) { + /* in these cases and equal type is enough */ + case cJSON_False: + case cJSON_True: + case cJSON_NULL: + return true; + + case cJSON_Number: + if (compare_double(a->valuedouble, b->valuedouble)) { + return true; + } + return false; + + case cJSON_String: + case cJSON_Raw: + if ((a->valuestring == NULL) || (b->valuestring == NULL)) { + return false; + } + if (strcmp(a->valuestring, b->valuestring) == 0) { + return true; + } + + return false; + + case cJSON_Array: { + cJSON *a_element = a->child; + cJSON *b_element = b->child; + + for (; (a_element != NULL) && (b_element != NULL);) { + if (!cJSON_Compare(a_element, b_element, case_sensitive)) { + return false; + } + + a_element = a_element->next; + b_element = b_element->next; + } + + /* one of the arrays is longer than the other */ + if (a_element != b_element) { + return false; + } + + return true; + } + + case cJSON_Object: { + cJSON *a_element = NULL; + cJSON *b_element = NULL; + cJSON_ArrayForEach(a_element, a) + { + /* TODO This has O(n^2) runtime, which is horrible! */ + b_element = get_object_item( + b, a_element->string, case_sensitive); + if (b_element == NULL) { + return false; + } + + if (!cJSON_Compare(a_element, b_element, case_sensitive)) { + return false; + } + } + + /* doing this twice, once on a and b to prevent true comparison if a subset of b + * TODO: Do this the proper way, this is just a fix for now */ + cJSON_ArrayForEach(b_element, b) + { + a_element = get_object_item( + a, b_element->string, case_sensitive); + if (a_element == NULL) { + return false; + } + + if (!cJSON_Compare(b_element, a_element, case_sensitive)) { + return false; + } + } + + return true; + } + + default: + return false; + } +} + +CJSON_PUBLIC(void *) cJSON_malloc(size_t size) +{ + return global_hooks.allocate(size); +} + +CJSON_PUBLIC(void) cJSON_free(void *object) +{ + global_hooks.deallocate(object); + object = NULL; +} + +static enum b_status b_object_to_cJSON(const struct b_object *object, cJSON **out); + +static enum b_status serialise_array(const struct b_object *object, cJSON **out) +{ + cJSON *json_array = cJSON_CreateArray(); + if (!json_array) { + return B_ERR_NO_MEMORY; + } + + struct b_array *array = B_ARRAY(object); + b_array_iterator it; + b_array_foreach(&it, array) + { + cJSON *child = NULL; + enum b_status status = b_object_to_cJSON(it.value, &child); + if (!B_OK(status)) { + cJSON_Delete(json_array); + return status; + } + + cJSON_AddItemToArray(json_array, child); + } + + *out = json_array; + return B_SUCCESS; +} + +static enum b_status serialise_dict(const struct b_object *object, cJSON **out) +{ + cJSON *json_dict = cJSON_CreateObject(); + if (!json_dict) { + return B_ERR_NO_MEMORY; + } + + struct b_dict *dict = B_DICT(object); + b_dict_iterator it; + b_dict_foreach(&it, dict) + { + cJSON *child = NULL; + enum b_status status = b_object_to_cJSON(it.value, &child); + if (!B_OK(status)) { + cJSON_Delete(json_dict); + return status; + } + + cJSON_AddItemToObject(json_dict, it.key, child); + } + + *out = json_dict; + return B_SUCCESS; +} + +static enum b_status serialise_number(const struct b_object *object, cJSON **out) +{ + cJSON *json_number = cJSON_CreateNumber(0); + if (!json_number) { + return B_ERR_NO_MEMORY; + } + + struct b_number *number = B_NUMBER(object); + enum b_number_type type = b_number_get_type(number); + + switch (type) { + case B_NUMBER_INT8: + cJSON_SetIntValue(json_number, b_number_get_int8(number)); + break; + case B_NUMBER_INT16: + cJSON_SetIntValue(json_number, b_number_get_int16(number)); + break; + case B_NUMBER_INT32: + cJSON_SetIntValue(json_number, b_number_get_int32(number)); + break; + case B_NUMBER_INT64: + cJSON_SetIntValue(json_number, b_number_get_int64(number)); + break; + case B_NUMBER_FLOAT32: + json_number->valuedouble = b_number_get_float32(number); + break; + case B_NUMBER_FLOAT64: + json_number->valuedouble = b_number_get_float64(number); + break; + case B_NUMBER_CHAR: + cJSON_SetIntValue(json_number, b_number_get_char(number)); + break; + case B_NUMBER_SHORT: + cJSON_SetIntValue(json_number, b_number_get_short(number)); + break; + case B_NUMBER_INT: + cJSON_SetIntValue(json_number, b_number_get_int(number)); + break; + case B_NUMBER_LONG: + cJSON_SetIntValue(json_number, b_number_get_long(number)); + break; + case B_NUMBER_LONGLONG: + cJSON_SetIntValue(json_number, b_number_get_longlong(number)); + break; + case B_NUMBER_FLOAT: + json_number->valuedouble = b_number_get_float(number); + break; + case B_NUMBER_DOUBLE: + json_number->valuedouble = b_number_get_double(number); + break; + case B_NUMBER_SIZE_T: + cJSON_SetIntValue(json_number, b_number_get_size_t(number)); + break; + case B_NUMBER_HANDLE: + cJSON_SetIntValue(json_number, b_number_get_int8(number)); + break; + default: + return B_ERR_NOT_SUPPORTED; + } + + *out = json_number; + return B_SUCCESS; +} + +static enum b_status serialise_string(const struct b_object *object, cJSON **out) +{ + struct b_string *string = B_STRING(object); + cJSON *json_string = cJSON_CreateStringReference(b_string_ptr(string)); + if (!json_string) { + return B_ERR_NO_MEMORY; + } + + *out = json_string; + return B_SUCCESS; +} + +static enum b_status serialise_uuid(const struct b_object *object, cJSON **out) +{ + struct b_uuid *uuid = B_UUID(object); + char s[B_UUID_STRING_MAX]; + b_uuid_to_cstr(uuid, s); + + cJSON *json_string = cJSON_CreateString(s); + if (!json_string) { + return B_ERR_NO_MEMORY; + } + + *out = json_string; + return B_SUCCESS; +} + +typedef enum b_status (*object_serialise_callback)( + const struct b_object *, cJSON **); + +static const object_serialise_callback object_serialise[] = { + [B_OBJECT_TYPE_ARRAY] = serialise_array, + [B_OBJECT_TYPE_DICT] = serialise_dict, + [B_OBJECT_TYPE_NUMBER] = serialise_number, + [B_OBJECT_TYPE_STRING] = serialise_string, + [B_OBJECT_TYPE_UUID] = serialise_uuid, +}; +static const size_t nr_object_serialise + = sizeof object_serialise / sizeof object_serialise[0]; + +static enum b_status b_object_to_cJSON(const struct b_object *object, cJSON **out) +{ + b_object_type_id type = b_typeid(object); + if (type >= nr_object_serialise) { + return B_ERR_NOT_SUPPORTED; + } + + object_serialise_callback callback = object_serialise[type]; + if (!callback) { + return B_ERR_NOT_SUPPORTED; + } + + return callback(object, out); +} + +static enum b_status cJSON_to_b_object(cJSON *json, struct b_object **out); + +static enum b_status deserialise_dict(cJSON *json, struct b_object **out) +{ + struct b_dict *dict = b_dict_create(); + if (!dict) { + return B_ERR_NO_MEMORY; + } + + cJSON *item = json->child; + enum b_status status = B_SUCCESS; + + while (item) { + struct b_object *child = NULL; + status = cJSON_to_b_object(item, &child); + if (!B_OK(status)) { + b_dict_release(dict); + dict = NULL; + break; + } + + if (child) { + b_dict_put(dict, item->string, child); + b_release(child); + } + + item = item->next; + } + + *out = B_OBJECT(dict); + return B_SUCCESS; +} + +static enum b_status deserialise_array(cJSON *json, struct b_object **out) +{ + struct b_array *array = b_array_create(); + if (!array) { + return B_ERR_NO_MEMORY; + } + + cJSON *item = json->child; + enum b_status status = B_SUCCESS; + + while (item) { + struct b_object *child = NULL; + status = cJSON_to_b_object(item, &child); + if (!B_OK(status)) { + b_array_release(array); + array = NULL; + break; + } + + if (child) { + b_array_append(array, child); + b_release(child); + } + + item = item->next; + } + + *out = B_OBJECT(array); + return B_SUCCESS; +} + +static enum b_status deserialise_string(cJSON *json, struct b_object **out) +{ + struct b_string *string = b_string_create_from_cstr(json->valuestring); + if (!string) { + return B_ERR_NO_MEMORY; + } + + *out = B_OBJECT(string); + return B_SUCCESS; +} + +static enum b_status deserialise_number(cJSON *json, struct b_object **out) +{ + struct b_number *number = NULL; + + if ((double)json->valueint == json->valuedouble) { + number = B_INT(json->valueint); + } else { + number = B_DOUBLE(json->valuedouble); + } + + if (!number) { + return B_ERR_NO_MEMORY; + } + + *out = B_OBJECT(number); + return B_SUCCESS; +} + +static enum b_status deserialise_bool(cJSON *json, struct b_object **out) +{ + struct b_number *number = NULL; + + if (json->type == cJSON_True) { + number = B_INT(1); + } else { + number = B_INT(0); + } + + if (!number) { + return B_ERR_NO_MEMORY; + } + + *out = B_OBJECT(number); + return B_SUCCESS; +} + +static enum b_status cJSON_to_b_object(cJSON *json, struct b_object **out) +{ + switch (json->type) { + case cJSON_True: + case cJSON_False: + return deserialise_bool(json, out); + case cJSON_Number: + return deserialise_number(json, out); + case cJSON_String: + return deserialise_string(json, out); + case cJSON_Array: + return deserialise_array(json, out); + case cJSON_Object: + return deserialise_dict(json, out); + case cJSON_NULL: + *out = NULL; + return B_SUCCESS; + default: + return B_ERR_NOT_SUPPORTED; + } +} + +static enum b_status json_serialise( + struct b_serial_ctx *ctx, struct b_object *src, struct b_stream *dest, + enum b_serial_flags flags) +{ + cJSON *json; + enum b_status status = b_object_to_cJSON(src, &json); + + if (!B_OK(status)) { + return status; + } + + char *json_str = NULL; + if (flags & B_SERIAL_F_PRETTY) { + json_str = cJSON_Print(json); + } else { + json_str = cJSON_PrintUnformatted(json); + } + + cJSON_Delete(json); + if (!json_str) { + return B_ERR_NO_MEMORY; + } + + for (size_t i = 0; json_str[i]; i++) { + b_stream_write_char(dest, json_str[i]); + } + + free(json_str); + return B_SUCCESS; +} + +static enum b_status json_deserialise( + struct b_serial_ctx *ctx, struct b_stream *src, struct b_object **dest, + enum b_serial_flags flags) +{ + struct b_string *json_string = b_string_create(); + struct b_stream *json_stream = NULL; + enum b_status status = b_string_open_stream(json_string, &json_stream); + if (!B_OK(status)) { + b_string_release(json_string); + return status; + } + + status = b_stream_read_all_bytes_s( + src, json_stream, ctx->ctx_pipeline, NULL); + b_stream_close(json_stream); + if (!B_OK(status)) { + b_string_release(json_string); + return status; + } + + cJSON *json = cJSON_Parse(b_string_ptr(json_string)); + b_string_release(json_string); + if (!json) { + return B_ERR_BAD_FORMAT; + } + + status = cJSON_to_b_object(json, dest); + + cJSON_Delete(json); + + return status; +} + +const struct b_serial_format_ops z__b_json_format_ops = { + .fmt_serialise = json_serialise, + .fmt_deserialise = json_deserialise, +}; diff --git a/serial/json.h b/serial/json.h new file mode 100644 index 0000000..f7ea30b --- /dev/null +++ b/serial/json.h @@ -0,0 +1,373 @@ +/* + Copyright (c) 2009-2017 Dave Gamble and cJSON contributors + + Permission is hereby granted, free of charge, to any person obtaining a copy + of this software and associated documentation files (the "Software"), to deal + in the Software without restriction, including without limitation the rights + to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + copies of the Software, and to permit persons to whom the Software is + furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be included in + all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + THE SOFTWARE. +*/ + +#ifndef cJSON__h +#define cJSON__h + +#ifdef __cplusplus +extern "C" { +#endif + +#if !defined(__WINDOWS__) \ + && (defined(WIN32) || defined(WIN64) || defined(_MSC_VER) \ + || defined(_WIN32)) +#define __WINDOWS__ +#endif + +#ifdef __WINDOWS__ + +/* When compiling for windows, we specify a specific calling convention to avoid +issues where we are being called from a project with a different default calling convention. For windows you have 3 define options: + +CJSON_HIDE_SYMBOLS - Define this in the case where you don't want to ever dllexport symbols +CJSON_EXPORT_SYMBOLS - Define this on library build when you want to dllexport symbols (default) +CJSON_IMPORT_SYMBOLS - Define this if you want to dllimport symbol + +For *nix builds that support visibility attribute, you can define similar behavior by + +setting default visibility to hidden by adding +-fvisibility=hidden (for gcc) +or +-xldscope=hidden (for sun cc) +to CFLAGS + +then using the CJSON_API_VISIBILITY flag to "export" the same symbols the way CJSON_EXPORT_SYMBOLS does + +*/ + +#define CJSON_CDECL __cdecl +#define CJSON_STDCALL __stdcall + +/* export symbols by default, this is necessary for copy pasting the C and header file */ +#if !defined(CJSON_HIDE_SYMBOLS) && !defined(CJSON_IMPORT_SYMBOLS) \ + && !defined(CJSON_EXPORT_SYMBOLS) +#define CJSON_EXPORT_SYMBOLS +#endif + +#if defined(CJSON_HIDE_SYMBOLS) +#define CJSON_PUBLIC(type) type CJSON_STDCALL +#elif defined(CJSON_EXPORT_SYMBOLS) +#define CJSON_PUBLIC(type) __declspec(dllexport) type CJSON_STDCALL +#elif defined(CJSON_IMPORT_SYMBOLS) +#define CJSON_PUBLIC(type) __declspec(dllimport) type CJSON_STDCALL +#endif +#else /* !__WINDOWS__ */ +#define CJSON_CDECL +#define CJSON_STDCALL + +#if (defined(__GNUC__) || defined(__SUNPRO_CC) || defined(__SUNPRO_C)) \ + && defined(CJSON_API_VISIBILITY) +#define CJSON_PUBLIC(type) __attribute__((visibility("default"))) type +#else +#define CJSON_PUBLIC(type) type +#endif +#endif + +/* project version */ +#define CJSON_VERSION_MAJOR 1 +#define CJSON_VERSION_MINOR 7 +#define CJSON_VERSION_PATCH 18 + +#include + +/* cJSON Types: */ +#define cJSON_Invalid (0) +#define cJSON_False (1 << 0) +#define cJSON_True (1 << 1) +#define cJSON_NULL (1 << 2) +#define cJSON_Number (1 << 3) +#define cJSON_String (1 << 4) +#define cJSON_Array (1 << 5) +#define cJSON_Object (1 << 6) +#define cJSON_Raw (1 << 7) /* raw json */ + +#define cJSON_IsReference 256 +#define cJSON_StringIsConst 512 + +/* The cJSON structure: */ +typedef struct cJSON { + /* next/prev allow you to walk array/object chains. Alternatively, use GetArraySize/GetArrayItem/GetObjectItem */ + struct cJSON *next; + struct cJSON *prev; + /* An array or object item will have a child pointer pointing to a chain of the items in the array/object. */ + struct cJSON *child; + + /* The type of the item, as above. */ + int type; + + /* The item's string, if type==cJSON_String and type == cJSON_Raw */ + char *valuestring; + /* writing to valueint is DEPRECATED, use cJSON_SetNumberValue instead */ + int valueint; + /* The item's number, if type==cJSON_Number */ + double valuedouble; + + /* The item's name string, if this item is the child of, or is in the list of subitems of an object. */ + char *string; +} cJSON; + +typedef struct cJSON_Hooks { + /* malloc/free are CDECL on Windows regardless of the default calling convention + * of the compiler, so ensure the hooks allow passing those functions directly. */ + void *(CJSON_CDECL *malloc_fn)(size_t sz); + void(CJSON_CDECL *free_fn)(void *ptr); +} cJSON_Hooks; + +typedef int cJSON_bool; + +/* Limits how deeply nested arrays/objects can be before cJSON rejects to parse + * them. This is to prevent stack overflows. */ +#ifndef CJSON_NESTING_LIMIT +#define CJSON_NESTING_LIMIT 1000 +#endif + +/* returns the version of cJSON as a string */ +CJSON_PUBLIC(const char *) cJSON_Version(void); + +/* Supply malloc, realloc and free functions to cJSON */ +CJSON_PUBLIC(void) cJSON_InitHooks(cJSON_Hooks *hooks); + +/* Memory Management: the caller is always responsible to free the results from + * all variants of cJSON_Parse (with cJSON_Delete) and cJSON_Print (with stdlib + * free, cJSON_Hooks.free_fn, or cJSON_free as appropriate). The exception is cJSON_PrintPreallocated, + * where the caller has full responsibility of the buffer. */ +/* Supply a block of JSON, and this returns a cJSON object you can interrogate. */ +CJSON_PUBLIC(cJSON *) cJSON_Parse(const char *value); +CJSON_PUBLIC(cJSON *) +cJSON_ParseWithLength(const char *value, size_t buffer_length); +/* ParseWithOpts allows you to require (and check) that the JSON is null + * terminated, and to retrieve the pointer to the final byte parsed. */ +/* If you supply a ptr in return_parse_end and parsing fails, then return_parse_end + * will contain a pointer to the error so will match cJSON_GetErrorPtr(). */ +CJSON_PUBLIC(cJSON *) +cJSON_ParseWithOpts( + const char *value, const char **return_parse_end, + cJSON_bool require_null_terminated); +CJSON_PUBLIC(cJSON *) +cJSON_ParseWithLengthOpts( + const char *value, size_t buffer_length, const char **return_parse_end, + cJSON_bool require_null_terminated); + +/* Render a cJSON entity to text for transfer/storage. */ +CJSON_PUBLIC(char *) cJSON_Print(const cJSON *item); +/* Render a cJSON entity to text for transfer/storage without any formatting. */ +CJSON_PUBLIC(char *) cJSON_PrintUnformatted(const cJSON *item); +/* Render a cJSON entity to text using a buffered strategy. prebuffer is a guess + * at the final size. guessing well reduces reallocation. fmt=0 gives unformatted, =1 gives formatted */ +CJSON_PUBLIC(char *) +cJSON_PrintBuffered(const cJSON *item, int prebuffer, cJSON_bool fmt); +/* Render a cJSON entity to text using a buffer already allocated in memory with given length. Returns 1 on success and 0 on failure. */ +/* NOTE: cJSON is not always 100% accurate in estimating how much memory it will + * use, so to be safe allocate 5 bytes more than you actually need */ +CJSON_PUBLIC(cJSON_bool) +cJSON_PrintPreallocated( + cJSON *item, char *buffer, const int length, const cJSON_bool format); +/* Delete a cJSON entity and all subentities. */ +CJSON_PUBLIC(void) cJSON_Delete(cJSON *item); + +/* Returns the number of items in an array (or object). */ +CJSON_PUBLIC(int) cJSON_GetArraySize(const cJSON *array); +/* Retrieve item number "index" from array "array". Returns NULL if unsuccessful. */ +CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int index); +/* Get item "string" from object. Case insensitive. */ +CJSON_PUBLIC(cJSON *) +cJSON_GetObjectItem(const cJSON *const object, const char *const string); +CJSON_PUBLIC(cJSON *) +cJSON_GetObjectItemCaseSensitive( + const cJSON *const object, const char *const string); +CJSON_PUBLIC(cJSON_bool) +cJSON_HasObjectItem(const cJSON *object, const char *string); +/* For analysing failed parses. This returns a pointer to the parse error. + * You'll probably need to look a few chars back to make sense of it. Defined + * when cJSON_Parse() returns 0. 0 when cJSON_Parse() succeeds. */ +CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void); + +/* Check item type and return its value */ +CJSON_PUBLIC(char *) cJSON_GetStringValue(const cJSON *const item); +CJSON_PUBLIC(double) cJSON_GetNumberValue(const cJSON *const item); + +/* These functions check the type of an item */ +CJSON_PUBLIC(cJSON_bool) cJSON_IsInvalid(const cJSON *const item); +CJSON_PUBLIC(cJSON_bool) cJSON_IsFalse(const cJSON *const item); +CJSON_PUBLIC(cJSON_bool) cJSON_IsTrue(const cJSON *const item); +CJSON_PUBLIC(cJSON_bool) cJSON_IsBool(const cJSON *const item); +CJSON_PUBLIC(cJSON_bool) cJSON_IsNull(const cJSON *const item); +CJSON_PUBLIC(cJSON_bool) cJSON_IsNumber(const cJSON *const item); +CJSON_PUBLIC(cJSON_bool) cJSON_IsString(const cJSON *const item); +CJSON_PUBLIC(cJSON_bool) cJSON_IsArray(const cJSON *const item); +CJSON_PUBLIC(cJSON_bool) cJSON_IsObject(const cJSON *const item); +CJSON_PUBLIC(cJSON_bool) cJSON_IsRaw(const cJSON *const item); + +/* These calls create a cJSON item of the appropriate type. */ +CJSON_PUBLIC(cJSON *) cJSON_CreateNull(void); +CJSON_PUBLIC(cJSON *) cJSON_CreateTrue(void); +CJSON_PUBLIC(cJSON *) cJSON_CreateFalse(void); +CJSON_PUBLIC(cJSON *) cJSON_CreateBool(cJSON_bool boolean); +CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num); +CJSON_PUBLIC(cJSON *) cJSON_CreateString(const char *string); +/* raw json */ +CJSON_PUBLIC(cJSON *) cJSON_CreateRaw(const char *raw); +CJSON_PUBLIC(cJSON *) cJSON_CreateArray(void); +CJSON_PUBLIC(cJSON *) cJSON_CreateObject(void); + +/* Create a string where valuestring references a string so + * it will not be freed by cJSON_Delete */ +CJSON_PUBLIC(cJSON *) cJSON_CreateStringReference(const char *string); +/* Create an object/array that only references it's elements so + * they will not be freed by cJSON_Delete */ +CJSON_PUBLIC(cJSON *) cJSON_CreateObjectReference(const cJSON *child); +CJSON_PUBLIC(cJSON *) cJSON_CreateArrayReference(const cJSON *child); + +/* These utilities create an Array of count items. + * The parameter count cannot be greater than the number of elements in the number array, otherwise array access will be out of bounds.*/ +CJSON_PUBLIC(cJSON *) cJSON_CreateIntArray(const int *numbers, int count); +CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count); +CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const double *numbers, int count); +CJSON_PUBLIC(cJSON *) +cJSON_CreateStringArray(const char *const *strings, int count); + +/* Append item to the specified array/object. */ +CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToArray(cJSON *array, cJSON *item); +CJSON_PUBLIC(cJSON_bool) +cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item); +/* Use this when string is definitely const (i.e. a literal, or as good as), and + * will definitely survive the cJSON object. WARNING: When this function was + * used, make sure to always check that (item->type & cJSON_StringIsConst) is + * zero before writing to `item->string` */ +CJSON_PUBLIC(cJSON_bool) +cJSON_AddItemToObjectCS(cJSON *object, const char *string, cJSON *item); +/* Append reference to item to the specified array/object. Use this when you want + * to add an existing cJSON to a new cJSON, but don't want to corrupt your existing cJSON. */ +CJSON_PUBLIC(cJSON_bool) +cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item); +CJSON_PUBLIC(cJSON_bool) +cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item); + +/* Remove/Detach items from Arrays/Objects. */ +CJSON_PUBLIC(cJSON *) +cJSON_DetachItemViaPointer(cJSON *parent, cJSON *const item); +CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromArray(cJSON *array, int which); +CJSON_PUBLIC(void) cJSON_DeleteItemFromArray(cJSON *array, int which); +CJSON_PUBLIC(cJSON *) +cJSON_DetachItemFromObject(cJSON *object, const char *string); +CJSON_PUBLIC(cJSON *) +cJSON_DetachItemFromObjectCaseSensitive(cJSON *object, const char *string); +CJSON_PUBLIC(void) +cJSON_DeleteItemFromObject(cJSON *object, const char *string); +CJSON_PUBLIC(void) +cJSON_DeleteItemFromObjectCaseSensitive(cJSON *object, const char *string); + +/* Update array items. */ +CJSON_PUBLIC(cJSON_bool) +cJSON_InsertItemInArray( + cJSON *array, int which, + cJSON *newitem); /* Shifts pre-existing items to the right. */ +CJSON_PUBLIC(cJSON_bool) +cJSON_ReplaceItemViaPointer( + cJSON *const parent, cJSON *const item, cJSON *replacement); +CJSON_PUBLIC(cJSON_bool) +cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem); +CJSON_PUBLIC(cJSON_bool) +cJSON_ReplaceItemInObject(cJSON *object, const char *string, cJSON *newitem); +CJSON_PUBLIC(cJSON_bool) +cJSON_ReplaceItemInObjectCaseSensitive( + cJSON *object, const char *string, cJSON *newitem); + +/* Duplicate a cJSON item */ +CJSON_PUBLIC(cJSON *) cJSON_Duplicate(const cJSON *item, cJSON_bool recurse); +/* Duplicate will create a new, identical cJSON item to the one you pass, in new + * memory that will need to be released. With recurse!=0, it will duplicate any + * children connected to the item. The item->next and ->prev pointers are always + * zero on return from Duplicate. */ +/* Recursively compare two cJSON items for equality. If either a or b is NULL or + * invalid, they will be considered unequal. case_sensitive determines if object + * keys are treated case sensitive (1) or case insensitive (0) */ +CJSON_PUBLIC(cJSON_bool) +cJSON_Compare( + const cJSON *const a, const cJSON *const b, + const cJSON_bool case_sensitive); + +/* Minify a strings, remove blank characters(such as ' ', '\t', '\r', '\n') from strings. + * The input pointer json cannot point to a read-only address area, such as a string constant, + * but should point to a readable and writable address area. */ +CJSON_PUBLIC(void) cJSON_Minify(char *json); + +/* Helper functions for creating and adding items to an object at the same time. + * They return the added item or NULL on failure. */ +CJSON_PUBLIC(cJSON *) +cJSON_AddNullToObject(cJSON *const object, const char *const name); +CJSON_PUBLIC(cJSON *) +cJSON_AddTrueToObject(cJSON *const object, const char *const name); +CJSON_PUBLIC(cJSON *) +cJSON_AddFalseToObject(cJSON *const object, const char *const name); +CJSON_PUBLIC(cJSON *) +cJSON_AddBoolToObject( + cJSON *const object, const char *const name, const cJSON_bool boolean); +CJSON_PUBLIC(cJSON *) +cJSON_AddNumberToObject( + cJSON *const object, const char *const name, const double number); +CJSON_PUBLIC(cJSON *) +cJSON_AddStringToObject( + cJSON *const object, const char *const name, const char *const string); +CJSON_PUBLIC(cJSON *) +cJSON_AddRawToObject( + cJSON *const object, const char *const name, const char *const raw); +CJSON_PUBLIC(cJSON *) +cJSON_AddObjectToObject(cJSON *const object, const char *const name); +CJSON_PUBLIC(cJSON *) +cJSON_AddArrayToObject(cJSON *const object, const char *const name); + +/* When assigning an integer value, it needs to be propagated to valuedouble too. */ +#define cJSON_SetIntValue(object, number) \ + ((object) ? (object)->valueint = (object)->valuedouble = (number) \ + : (number)) +/* helper for the cJSON_SetNumberValue macro */ +CJSON_PUBLIC(double) cJSON_SetNumberHelper(cJSON *object, double number); +#define cJSON_SetNumberValue(object, number) \ + ((object != NULL) ? cJSON_SetNumberHelper(object, (double)number) \ + : (number)) +/* Change the valuestring of a cJSON_String object, only takes effect when type of object is cJSON_String */ +CJSON_PUBLIC(char *) +cJSON_SetValuestring(cJSON *object, const char *valuestring); + +/* If the object is not a boolean type this does nothing and returns cJSON_Invalid else it returns the new type*/ +#define cJSON_SetBoolValue(object, boolValue) \ + ((object != NULL && ((object)->type & (cJSON_False | cJSON_True))) \ + ? (object)->type \ + = ((object)->type & (~(cJSON_False | cJSON_True))) \ + | ((boolValue) ? cJSON_True : cJSON_False) \ + : cJSON_Invalid) + +/* Macro for iterating over an array or object */ +#define cJSON_ArrayForEach(element, array) \ + for (element = (array != NULL) ? (array)->child : NULL; \ + element != NULL; element = element->next) + +/* malloc/free objects using the malloc/free functions that have been set with cJSON_InitHooks */ +CJSON_PUBLIC(void *) cJSON_malloc(size_t size); +CJSON_PUBLIC(void) cJSON_free(void *object); + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/serial/serial.c b/serial/serial.c new file mode 100644 index 0000000..07df3b0 --- /dev/null +++ b/serial/serial.c @@ -0,0 +1,82 @@ +#include "serial.h" + +#include +#include +#include + +extern const struct b_serial_format_ops z__b_bitcode_format_ops; +extern const struct b_serial_format_ops z__b_json_format_ops; + +static const struct b_serial_format_ops *format_ops[] = { + [B_SERIAL_FORMAT_NONE] = NULL, + [B_SERIAL_FORMAT_BITCODE] = &z__b_bitcode_format_ops, + [B_SERIAL_FORMAT_JSON] = &z__b_json_format_ops, +}; +static const size_t nr_format_ops = sizeof format_ops / sizeof format_ops[0]; + +enum b_status b_serial_ctx_create(struct b_serial_ctx **out) +{ + struct b_serial_ctx *ctx = malloc(sizeof *ctx); + if (!ctx) { + return B_ERR_NO_MEMORY; + } + + memset(ctx, 0x0, sizeof *ctx); + + enum b_status status = b_stream_pipeline_create(2048, &ctx->ctx_pipeline); + if (!B_OK(status)) { + free(ctx); + return status; + } + + *out = ctx; + return B_SUCCESS; +} + +enum b_status b_serial_ctx_destroy(struct b_serial_ctx *ctx) +{ + b_stream_pipeline_destroy(ctx->ctx_pipeline); + free(ctx); + return B_SUCCESS; +} + +static const struct b_serial_format_ops *get_formatter(enum b_serial_format fmt) +{ + if (fmt < 0 || fmt >= nr_format_ops) { + return NULL; + } + + return format_ops[fmt]; +} + +enum b_status b_serial_ctx_serialise( + struct b_serial_ctx *ctx, enum b_serial_format fmt, + struct b_object *src, struct b_stream *dest, enum b_serial_flags flags) +{ + const struct b_serial_format_ops *ops = get_formatter(fmt); + if (!ops) { + return B_ERR_INVALID_ARGUMENT; + } + + if (!ops->fmt_serialise) { + return B_ERR_NOT_SUPPORTED; + } + + return ops->fmt_serialise(ctx, src, dest, flags); +} + +enum b_status b_serial_ctx_deserialise( + struct b_serial_ctx *ctx, enum b_serial_format fmt, + struct b_stream *src, struct b_object **dest, enum b_serial_flags flags) +{ + const struct b_serial_format_ops *ops = get_formatter(fmt); + if (!ops) { + return B_ERR_INVALID_ARGUMENT; + } + + if (!ops->fmt_deserialise) { + return B_ERR_NOT_SUPPORTED; + } + + return ops->fmt_deserialise(ctx, src, dest, flags); +} diff --git a/serial/serial.h b/serial/serial.h new file mode 100644 index 0000000..69d39d1 --- /dev/null +++ b/serial/serial.h @@ -0,0 +1,20 @@ +#ifndef _SERIAL_SERIAL_H_ +#define _SERIAL_SERIAL_H_ + +#include +#include + +struct b_serial_ctx { + struct b_stream_pipeline *ctx_pipeline; +}; + +struct b_serial_format_ops { + enum b_status (*fmt_serialise)( + struct b_serial_ctx *, struct b_object *, struct b_stream *, + enum b_serial_flags); + enum b_status (*fmt_deserialise)( + struct b_serial_ctx *, struct b_stream *, struct b_object **, + enum b_serial_flags); +}; + +#endif