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#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
struct testcookie {
bool read;
bool write;
bool seek;
bool close;
};
ssize_t cookie_read(void *c, char *buf, size_t size) {
(void) buf;
struct testcookie *cookie = c;
cookie->read = true;
return size;
}
ssize_t cookie_write(void *c, const char *buf, size_t size) {
(void) buf;
struct testcookie *cookie = c;
cookie->write = true;
return size;
}
int cookie_seek(void *c, off64_t *offset, int whence) {
(void) offset;
(void) whence;
struct testcookie *cookie = c;
cookie->seek = true;
return 0;
}
int cookie_close(void *c) {
struct testcookie *cookie = c;
cookie->close = true;
return 0;
}
int main() {
struct testcookie cookie = { false, false, false, false };
cookie_io_functions_t funcs = {
.read = cookie_read,
.write = cookie_write,
.seek = cookie_seek,
.close = cookie_close,
};
FILE *stream = fopencookie(&cookie, "w+", funcs);
assert(stream);
unsigned char buf[1];
int ret = fread(buf, 1, 1, stream);
assert(ret == 1);
ret = fwrite(buf, 1, 1, stream);
assert(ret == 1);
ret = fseek(stream, 0, SEEK_SET);
assert(!ret);
ret = fclose(stream);
assert(!ret);
assert(cookie.read && cookie.write && cookie.seek && cookie.close);
}
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