mirror of
https://github.com/vivier/EMILE.git
synced 2024-09-08 04:54:25 +00:00
97 lines
1.4 KiB
C
97 lines
1.4 KiB
C
static __attribute__((used)) char* rcsid = "$CVSHeader$";
|
|
/*
|
|
*
|
|
* (c) 2004 Laurent Vivier <LaurentVivier@wanadoo.fr>
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "libemile.h"
|
|
|
|
int emile_get_uncompressed_size(char *file)
|
|
{
|
|
int ret;
|
|
int i;
|
|
int tube[2];
|
|
char buffer[1024];
|
|
char *uncompressed;
|
|
struct stat st;
|
|
|
|
ret = stat(file, &st);
|
|
if (ret == -1)
|
|
return -1;
|
|
|
|
if (st.st_size == 0)
|
|
return -1;
|
|
|
|
ret = pipe(tube);
|
|
if (ret == -1)
|
|
return -1;
|
|
|
|
if (fork() == 0)
|
|
{
|
|
/* child */
|
|
|
|
close(tube[0]);
|
|
|
|
close(STDOUT_FILENO);
|
|
dup(tube[1]);
|
|
close(STDERR_FILENO);
|
|
|
|
execlp("gzip", "gzip", "-l", file, NULL);
|
|
|
|
/* never comes here ... */
|
|
|
|
exit(1);
|
|
}
|
|
|
|
/* parent */
|
|
|
|
close(tube[1]);
|
|
|
|
ret = read(tube[0], buffer, 1024);
|
|
if (ret == -1)
|
|
return -1;
|
|
|
|
if (ret == 0)
|
|
return 0;
|
|
|
|
/* skip first line */
|
|
|
|
i = 0;
|
|
while ( (buffer[i] != '\n') && (i < 1024))
|
|
i++;
|
|
i++; /* skip '\n' */
|
|
|
|
/* skip space */
|
|
|
|
while ( (buffer[i] == ' ') && (i < 1024))
|
|
i++;
|
|
|
|
/* skip compressed size */
|
|
|
|
while ( (buffer[i] >= '0') && buffer[i] <= '9' && (i < 1024))
|
|
i++;
|
|
buffer[i++] = 0;
|
|
|
|
/* skip space */
|
|
|
|
while ( (buffer[i] == ' ') && (i < 1024))
|
|
i++;
|
|
|
|
/* get uncompressed size */
|
|
|
|
uncompressed = &buffer[i];
|
|
while ( (buffer[i] >= '0') && buffer[i] <= '9' && (i < 1024))
|
|
i++;
|
|
buffer[i++] = 0;
|
|
|
|
close(tube[0]);
|
|
|
|
return atoi(uncompressed);
|
|
}
|