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git/test-delta.c
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/* | |
* test-delta.c: test code to exercise diff-delta.c and patch-delta.c | |
* | |
* (C) 2005 Nicolas Pitre <nico@fluxnic.net> | |
* | |
* This code is free software; you can redistribute it and/or modify | |
* it under the terms of the GNU General Public License version 2 as | |
* published by the Free Software Foundation. | |
*/ | |
#include "git-compat-util.h" | |
#include "delta.h" | |
#include "cache.h" | |
static const char usage_str[] = | |
"test-delta (-d|-p) <from_file> <data_file> <out_file>"; | |
int main(int argc, char *argv[]) | |
{ | |
int fd; | |
struct stat st; | |
void *from_buf, *data_buf, *out_buf; | |
unsigned long from_size, data_size, out_size; | |
if (argc != 5 || (strcmp(argv[1], "-d") && strcmp(argv[1], "-p"))) { | |
fprintf(stderr, "usage: %s\n", usage_str); | |
return 1; | |
} | |
fd = open(argv[2], O_RDONLY); | |
if (fd < 0 || fstat(fd, &st)) { | |
perror(argv[2]); | |
return 1; | |
} | |
from_size = st.st_size; | |
from_buf = mmap(NULL, from_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
if (from_buf == MAP_FAILED) { | |
perror(argv[2]); | |
close(fd); | |
return 1; | |
} | |
close(fd); | |
fd = open(argv[3], O_RDONLY); | |
if (fd < 0 || fstat(fd, &st)) { | |
perror(argv[3]); | |
return 1; | |
} | |
data_size = st.st_size; | |
data_buf = mmap(NULL, data_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
if (data_buf == MAP_FAILED) { | |
perror(argv[3]); | |
close(fd); | |
return 1; | |
} | |
close(fd); | |
if (argv[1][1] == 'd') | |
out_buf = diff_delta(from_buf, from_size, | |
data_buf, data_size, | |
&out_size, 0); | |
else | |
out_buf = patch_delta(from_buf, from_size, | |
data_buf, data_size, | |
&out_size); | |
if (!out_buf) { | |
fprintf(stderr, "delta operation failed (returned NULL)\n"); | |
return 1; | |
} | |
fd = open (argv[4], O_WRONLY|O_CREAT|O_TRUNC, 0666); | |
if (fd < 0 || write_in_full(fd, out_buf, out_size) != out_size) { | |
perror(argv[4]); | |
return 1; | |
} | |
return 0; | |
} |