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check if file is gzipped

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This commit is contained in:
Laurent Vivier 2007-08-26 19:15:08 +00:00
parent 14c9373da5
commit 76401bbcba
1 changed files with 21 additions and 1 deletions
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20
libemile/emile_floppy_create_image.c
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@ -150,6 +150,23 @@ int emile_floppy_create(char *image, char* first_level, char* second_level)
return fd;
}
static int is_gzipped(char *name)
{
int fd;
unsigned char magic[2];
magic[0] = magic[1] = 0;
fd = open(name, O_RDONLY);
if (fd == -1)
return 0;
read(fd, magic, 2);
close(fd);
return (magic[0] == 0x1f) && (magic[1] == 0x8b);
}
char* emile_floppy_add(int fd, char *image)
{
off_t offset;
@ -166,6 +183,9 @@ char* emile_floppy_add(int fd, char *image)
if (size == -1)
return NULL;
if (is_gzipped(image))
sprintf(buf, "block:(fd0)0x%lx", offset);
else
sprintf(buf, "block:(fd0)0x%lx,0x%zx", offset, size);
return strdup(buf);