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#include <io.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <libc.h>
weak void __stdio_cleanup(void)
{
}
FILE *fmemopen(void *restrict buf, size_t max_size, const char *restrict mode)
{
int flags;
FILE *f = calloc(1, sizeof(FILE));
if (f == NULL)
return f;
f->fd = -1;
f->buf = buf;
f->buf_size = max_size;
f->type = _IOFBF;
if (mode[0] == 'r') {
flags = O_RDONLY;
} else if (mode[0] == 'w') {
flags = O_WRONLY | O_CREAT | O_TRUNC;
} else if (mode[0] == 'a') {
flags = O_WRONLY | O_CREAT | O_APPEND;
} else {
errno = EINVAL;
return NULL;
}
if (strchr(mode, '+')) {
flags = (flags & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
}
f->flags = flags;
__libc_fadd(f);
return f;
}
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