/* ui-diff.c: show diff between two blobs * * Copyright (C) 2006 Lars Hjemli * * Licensed under GNU General Public License v2 *   (see COPYING for full license text) */ #include "cgit.h"  unsigned char old_rev_sha1[20];unsigned char new_rev_sha1[20]; /* * print a single line returned from xdiff */static void print_line(char *line, int len){	char *class = "ctx";	char c = line[len-1]; 	if (line[0] == '+')		class = "add";	else if (line[0] == '-')		class = "del";	else if (line[0] == '@')		class = "hunk"; 	htmlf("<div class='%s'>", class);	line[len-1] = '\0';	html_txt(line);	html("</div>");	line[len-1] = c;} static void header(unsigned char *sha1, char *path1, int mode1,		   unsigned char *sha2, char *path2, int mode2){	char *abbrev1, *abbrev2;	int subproject; 	subproject = (S_ISGITLINK(mode1) || S_ISGITLINK(mode2));	html("<div class='head'>");	html("diff --git a/");	html_txt(path1);	html(" b/");	html_txt(path2); 	if (is_null_sha1(sha1))		path1 = "dev/null";	if (is_null_sha1(sha2))		path2 = "dev/null"; 	if (mode1 == 0)		htmlf("<br/>new file mode %.6o", mode2); 	if (mode2 == 0)		htmlf("<br/>deleted file mode %.6o", mode1); 	if (!subproject) {		abbrev1 = xstrdup(find_unique_abbrev(sha1, DEFAULT_ABBREV));		abbrev2 = xstrdup(find_unique_abbrev(sha2, DEFAULT_ABBREV));		htmlf("<br/>index %s..%s", abbrev1, abbrev2);		free(abbrev1);		free(abbrev2);		if (mode1 != 0 && mode2 != 0) {			htmlf(" %.6o", mode1);			if (mode2 != mode1)				htmlf("..%.6o", mode2);		}		html("<br/>--- a/");		if (mode1 != 0)			cgit_tree_link(path1, NULL, NULL, cgit_query_head,				       sha1_to_hex(old_rev_sha1), path1);		else			html_txt(path1);		html("<br/>+++ b/");		if (mode2 != 0)			cgit_tree_link(path2, NULL, NULL, cgit_query_head,				       sha1_to_hex(new_rev_sha1), path2);		else			html_txt(path2);	}	html("</div>");} static void filepair_cb(struct diff_filepair *pair){	header(pair->one->sha1, pair->one->path, pair->one->mode,	       pair->two->sha1, pair->two->path, pair->two->mode);	if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) {		if (S_ISGITLINK(pair->one->mode))			print_line(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);		if (S_ISGITLINK(pair->two->mode))			print_line(fmt("+Subproject %s", sha1_to_hex(pair->two->sha1)), 52);		return;	}	if (cgit_diff_files(pair->one->sha1, pair->two->sha1, print_line))		cgit_print_error("Error running diff");} void cgit_print_diff(const char *new_rev, const char *old_rev, const char *prefix){	enum object_type type;	unsigned long size;	struct commit *commit, *commit2; 	if (!new_rev)		new_rev = cgit_query_head;	get_sha1(new_rev, new_rev_sha1);	type = sha1_object_info(new_rev_sha1, &size);	if (type == OBJ_BAD) {		cgit_print_error(fmt("Bad object name: %s", new_rev));		return;	}	if (type != OBJ_COMMIT) {		cgit_print_error(fmt("Unhandled object type: %s",				     typename(type)));		return;	} 	commit = lookup_commit_reference(new_rev_sha1);	if (!commit || parse_commit(commit))		cgit_print_error(fmt("Bad commit: %s", sha1_to_hex(new_rev_sha1))); 	if (old_rev)		get_sha1(old_rev, old_rev_sha1);	else if (commit->parents && commit->parents->item)		hashcpy(old_rev_sha1, commit->parents->item->object.sha1);	else		hashclr(old_rev_sha1); 	if (!is_null_sha1(old_rev_sha1)) {		type = sha1_object_info(old_rev_sha1, &size);		if (type == OBJ_BAD) {			cgit_print_error(fmt("Bad object name: %s", sha1_to_hex(old_rev_sha1)));			return;		}		commit2 = lookup_commit_reference(old_rev_sha1);		if (!commit2 || parse_commit(commit2))			cgit_print_error(fmt("Bad commit: %s", sha1_to_hex(old_rev_sha1)));	}	html("<table class='diff'>");	html("<tr><td>");	cgit_diff_tree(old_rev_sha1, new_rev_sha1, filepair_cb, prefix);	html("</td></tr>");	html("</table>");}