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#include "project.h"
void
fatal_zip (struct zip *zip)
{
fprintf (stderr, "zip error: %s\n", zip_strerror (zip));
exit (EXIT_FAILURE);
}
struct zip *
open_zip (const char *fn)
{
struct zip *ret;
int fd;
int error;
fd = open (fn, O_RDONLY);
if (fd < 0)
{
perror ("open");
exit (EXIT_FAILURE);
}
ret = zip_fdopen (fd, 0, &error);
if (!ret)
{
fprintf (stderr, "filed to open zip file %s: %d\n", fn, error);
exit (EXIT_FAILURE);
}
return ret;
}
size_t
read_file_from_zip (struct zip * zip, const char *fn, void *_buf)
{
struct zip_file *f;
size_t size = 0, buf_sz = 1024;
ssize_t red;
uint8_t *buf;
f = zip_fopen (zip, fn, 0);
if (!f)
fatal_zip (zip);
buf = xmalloc (buf_sz + 1);
for (;;)
{
red = zip_fread (f, buf + size, buf_sz - size);
if (red < 0)
fatal_zip (zip);
if (!red)
break;
size += red;
if (size == buf_sz)
{
buf_sz <<= 1;
buf = xrealloc (buf, buf_sz);
}
}
buf[size] = 0;
zip_fclose (f);
*(void **) _buf = (void *) buf;
return size;
}
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