meta: move photon/libc to root

libc/include/string.h

@@ -0,0 +1,39 @@
+#ifndef STRING_H_
+#define STRING_H_
+
+#include <stddef.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+extern void *memcpy(void *dest, const void *src, size_t sz);
+extern int memcmp(const void *a, const void *b, size_t sz);
+extern void *memmove(void *dest, const void *src, size_t sz);
+extern void *memset(void *ptr, int value, size_t sz);
+
+extern char *strcat(char *dest, const char *src);
+
+extern size_t strlen(const char *str);
+extern int strcmp(const char *a, const char *b);
+extern int strncmp(const char *a, const char *b, size_t sz);
+
+extern char *strcpy(char *dest, const char *src);
+extern char *strncpy(char *dest, const char *src, size_t sz);
+
+extern char *strchr(const char *str, int ch);
+extern char *strrchr(const char *s, int c);
+extern size_t strcspn(const char *str1, const char *str2);
+
+extern char *strdup(const char *s);
+
+extern char *strtok(char *s, const char *delim);
+extern char *strtok_r(char *s, const char *delim, char **sp);
+
+extern char *strerror(int errnum);
+
+#if defined(__cplusplus)
+} /* extern "C" */
+#endif
+
+#endif