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a89fccd281
Introduces global inline: hashcmp(const unsigned char *sha1, const unsigned char *sha2) Uses memcmp for comparison and returns the result based on the length of the hash name (a future runtime decision). Acked-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
/*
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* Copyright (c) 2005 Junio C Hamano
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*/
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#include "cache.h"
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#include "diff.h"
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#include "builtin.h"
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static struct diff_options diff_options;
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static const char diff_stages_usage[] =
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"git-diff-stages [<common diff options>] <stage1> <stage2> [<path>...]"
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COMMON_DIFF_OPTIONS_HELP;
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static void diff_stages(int stage1, int stage2, const char **pathspec)
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{
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int i = 0;
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while (i < active_nr) {
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struct cache_entry *ce, *stages[4] = { NULL, };
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struct cache_entry *one, *two;
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const char *name;
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int len, skip;
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ce = active_cache[i];
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skip = !ce_path_match(ce, pathspec);
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len = ce_namelen(ce);
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name = ce->name;
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for (;;) {
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int stage = ce_stage(ce);
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stages[stage] = ce;
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if (active_nr <= ++i)
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break;
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ce = active_cache[i];
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if (ce_namelen(ce) != len ||
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memcmp(name, ce->name, len))
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break;
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}
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one = stages[stage1];
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two = stages[stage2];
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if (skip || (!one && !two))
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continue;
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if (!one)
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diff_addremove(&diff_options, '+', ntohl(two->ce_mode),
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two->sha1, name, NULL);
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else if (!two)
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diff_addremove(&diff_options, '-', ntohl(one->ce_mode),
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one->sha1, name, NULL);
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else if (hashcmp(one->sha1, two->sha1) ||
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(one->ce_mode != two->ce_mode) ||
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diff_options.find_copies_harder)
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diff_change(&diff_options,
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ntohl(one->ce_mode), ntohl(two->ce_mode),
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one->sha1, two->sha1, name, NULL);
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}
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}
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int cmd_diff_stages(int ac, const char **av, const char *prefix)
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{
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int stage1, stage2;
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const char **pathspec = NULL;
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git_config(git_default_config); /* no "diff" UI options */
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read_cache();
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diff_setup(&diff_options);
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while (1 < ac && av[1][0] == '-') {
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const char *arg = av[1];
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if (!strcmp(arg, "-r"))
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; /* as usual */
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else {
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int diff_opt_cnt;
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diff_opt_cnt = diff_opt_parse(&diff_options,
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av+1, ac-1);
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if (diff_opt_cnt < 0)
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usage(diff_stages_usage);
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else if (diff_opt_cnt) {
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av += diff_opt_cnt;
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ac -= diff_opt_cnt;
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continue;
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}
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else
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usage(diff_stages_usage);
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}
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ac--; av++;
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}
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if (!diff_options.output_format)
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diff_options.output_format = DIFF_FORMAT_RAW;
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if (ac < 3 ||
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sscanf(av[1], "%d", &stage1) != 1 ||
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! (0 <= stage1 && stage1 <= 3) ||
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sscanf(av[2], "%d", &stage2) != 1 ||
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! (0 <= stage2 && stage2 <= 3))
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usage(diff_stages_usage);
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av += 3; /* The rest from av[0] are for paths restriction. */
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pathspec = get_pathspec(prefix, av);
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if (diff_setup_done(&diff_options) < 0)
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usage(diff_stages_usage);
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diff_stages(stage1, stage2, pathspec);
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diffcore_std(&diff_options);
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diff_flush(&diff_options);
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return 0;
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}
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