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io: file: implement tell() callback for file streams

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max 🍓
2025-10-12 17:29:49 +01:00
parent 57f21020fc
commit 407a0972c1
1 changed files with 16 additions and 3 deletions
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19
io/sys/darwin/file.c
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@@ -274,6 +274,18 @@ static enum b_status stream_seek(
return b_file_cursor(file, &stream->s_cursor); return b_file_cursor(file, &stream->s_cursor);
} }
static enum b_status stream_tell(const struct b_stream *stream, size_t *pos)
{
const struct b_file *file = stream->s_ptr;
off_t v = lseek(file->fd, 0, SEEK_CUR);
if (v == (off_t)-1) {
return b_status_from_errno(errno, B_ERR_IO_FAILURE);
}
*pos = v;
return B_SUCCESS;
}
const struct b_path *b_file_path(const struct b_file *file) const struct b_path *b_file_path(const struct b_file *file)
{ {
return file->path; return file->path;
@@ -306,6 +318,7 @@ enum b_status b_file_open_stream(struct b_file *file, struct b_stream **out)
stream->s_read = stream_read; stream->s_read = stream_read;
stream->s_write = stream_write; stream->s_write = stream_write;
stream->s_seek = stream_seek; stream->s_seek = stream_seek;
stream->s_tell = stream_tell;
*out = stream; *out = stream;
@@ -387,11 +400,11 @@ enum b_status b_file_seek(
} }
int err = lseek(file->fd, offset, whence); int err = lseek(file->fd, offset, whence);
if (err == 0) { if (err == (off_t)-1) {
return B_SUCCESS; return b_status_from_errno(errno, B_ERR_IO_FAILURE);
} }
return b_status_from_errno(errno, B_ERR_IO_FAILURE); return B_SUCCESS;
} }
enum b_status b_file_swap_shadow(struct b_file *main_file, struct b_file *shadow_file) enum b_status b_file_swap_shadow(struct b_file *main_file, struct b_file *shadow_file)