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/*
* Public domain stdio wrapper for libz, written by Johan Danielsson.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdio.h>
#include <zlib.h>
FILE *zopen(const char *fname, const char *mode);
/* convert arguments */
static int
xgzread(void *cookie, char *data, int size)
{
return gzread(cookie, data, size);
}
static int
xgzwrite(void *cookie, const char *data, int size)
{
return gzwrite(cookie, (void*)data, size);
}
static int
xgzclose(void *cookie)
{
return gzclose(cookie);
}
static fpos_t
xgzseek(void *cookie, fpos_t offset, int whence)
{
return gzseek(cookie, (z_off_t)offset, whence);
}
FILE *
zopen(const char *fname, const char *mode)
{
gzFile gz = gzopen(fname, mode);
if(gz == NULL)
return NULL;
if(*mode == 'r')
return (funopen(gz, xgzread, NULL, xgzseek, xgzclose));
else
return (funopen(gz, NULL, xgzwrite, xgzseek, xgzclose));
}
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