/* 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"  /* * 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_ISDIRLNK(mode1) || S_ISDIRLNK(mode2));	html("<tr><td>");	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/");		html_txt(path1);		html("<br/>+++ b/");		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_ISDIRLNK(pair->one->mode) || S_ISDIRLNK(pair->two->mode)) {		if (S_ISDIRLNK(pair->one->mode))			print_line(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);		if (S_ISDIRLNK(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 *head, const char *old_hex, const char *new_hex, char *path){	unsigned char sha1[20], sha2[20];	enum object_type type;	unsigned long size;	struct commit *commit; 	if (head && !old_hex && !new_hex) {		get_sha1(head, sha1);		commit = lookup_commit_reference(sha1);		if (commit && !parse_commit(commit)) {			html("<table class='diff'>");			cgit_diff_commit(commit, filepair_cb);			html("</td></tr></table>");		}		return;	} 	get_sha1(old_hex, sha1);	get_sha1(new_hex, sha2); 	type = sha1_object_info(sha1, &size);	if (type == OBJ_BAD) {		type = sha1_object_info(sha2, &size);		if (type == OBJ_BAD) {			cgit_print_error(fmt("Bad object names: %s, %s", old_hex, new_hex));			return;		}	} 	html("<table class='diff'>");	switch(type) {	case OBJ_BLOB:		html("<tr><td>");		header(sha1, path, 0644, sha2, path, 0644);		if (cgit_diff_files(sha1, sha2, print_line))			cgit_print_error("Error running diff");		html("</tr></td>");		break;	case OBJ_TREE:		cgit_diff_tree(sha1, sha2, filepair_cb);		break;	default:		cgit_print_error(fmt("Unhandled object type: %s",				     typename(type)));		break;	}	html("</td></tr></table>");}