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/*
* Copyright (C) 2005 Junio C Hamano
*/
#include <limits.h>
#include "cache.h"
#include "strbuf.h"
#include "diff.h"
static int detect_rename = 0;
static int diff_score_opt = 0;
static const char *pickaxe = NULL;
static int diff_output_style = DIFF_FORMAT_PATCH;
static int line_termination = '\n';
static int inter_name_termination = '\t';
static int parse_diff_raw(char *buf1, char *buf2, char *buf3)
{
char old_path[PATH_MAX];
unsigned char old_sha1[20], new_sha1[20];
char *ep;
char *cp = buf1;
int ch, old_mode, new_mode;
old_mode = new_mode = 0;
while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
old_mode = (old_mode << 3) | (ch - '0');
cp++;
}
if (*cp++ != ' ')
return -1;
while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
new_mode = (new_mode << 3) | (ch - '0');
cp++;
}
if (*cp++ != ' ')
return -1;
if (get_sha1_hex(cp, old_sha1))
return -1;
cp += 40;
if (*cp++ != ' ')
return -1;
if (get_sha1_hex(cp, new_sha1))
return -1;
cp += 40;
if (*cp++ != inter_name_termination)
return -1;
if (buf2)
cp = buf2;
ep = strchr(cp, inter_name_termination);
if (!ep)
return -1;
*ep++ = 0;
strcpy(old_path, cp);
diff_guif(old_mode, new_mode, old_sha1, new_sha1,
old_path, buf3 ? buf3 : ep);
return 0;
}
static const char *diff_helper_usage =
"git-diff-helper [-z] [-R] [-M] [-C] [-S<string>] paths...";
int main(int ac, const char **av) {
struct strbuf sb1, sb2, sb3;
int reverse_diff = 0;
strbuf_init(&sb1);
strbuf_init(&sb2);
strbuf_init(&sb3);
while (1 < ac && av[1][0] == '-') {
if (av[1][1] == 'R')
reverse_diff = 1;
else if (av[1][1] == 'z')
line_termination = inter_name_termination = 0;
else if (av[1][1] == 'p') /* hidden from the help */
diff_output_style = DIFF_FORMAT_HUMAN;
else if (av[1][1] == 'P') /* hidden from the help */
diff_output_style = DIFF_FORMAT_MACHINE;
else if (av[1][1] == 'M') {
detect_rename = DIFF_DETECT_RENAME;
diff_score_opt = diff_scoreopt_parse(av[1]);
}
else if (av[1][1] == 'C') {
detect_rename = DIFF_DETECT_COPY;
diff_score_opt = diff_scoreopt_parse(av[1]);
}
else if (av[1][1] == 'S') {
pickaxe = av[1] + 2;
}
else
usage(diff_helper_usage);
ac--; av++;
}
/* the remaining parameters are paths patterns */
diff_setup(reverse_diff);
while (1) {
int status;
read_line(&sb1, stdin, line_termination);
if (sb1.eof)
break;
switch (sb1.buf[0]) {
case 'U':
diff_unmerge(sb1.buf + 2);
continue;
case ':':
break;
default:
goto unrecognized;
}
if (!line_termination) {
read_line(&sb2, stdin, line_termination);
if (sb2.eof)
break;
read_line(&sb3, stdin, line_termination);
if (sb3.eof)
break;
status = parse_diff_raw(sb1.buf+1, sb2.buf, sb3.buf);
}
else
status = parse_diff_raw(sb1.buf+1, NULL, NULL);
if (status) {
unrecognized:
diff_flush(diff_output_style);
printf("%s%c", sb1.buf, line_termination);
}
}
if (detect_rename)
diffcore_rename(detect_rename, diff_score_opt);
diffcore_prune();
if (pickaxe)
diffcore_pickaxe(pickaxe);
if (ac)
diffcore_pathspec(av + 1);
diff_flush(diff_output_style);
return 0;
}
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