Simplify ui-diff.c using the new file-level diff interface

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

ui-diff.c

@@ -8,9 +8,6 @@
 
 #include "cgit.h"
 
-char *diff_buffer;
-int diff_buffer_size;
-
 
 /*
  * print a single line returned from xdiff
@@ -34,88 +31,6 @@ static void print_line(char *line, int len)
 	line[len-1] = c;
 }
 
-/*
- * Receive diff-buffers from xdiff and concatenate them as
- * needed across multiple callbacks.
- *
- * This is basically a copy of xdiff-interface.c/xdiff_outf(),
- * ripped from git and modified to use globals instead of
- * a special callback-struct.
- */
-int diff_cb(void *priv_, mmbuffer_t *mb, int nbuf)
-{
-	int i;
-
-	for (i = 0; i < nbuf; i++) {
-		if (mb[i].ptr[mb[i].size-1] != '\n') {
-			/* Incomplete line */
-			diff_buffer = xrealloc(diff_buffer,
-					       diff_buffer_size + mb[i].size);
-			memcpy(diff_buffer + diff_buffer_size,
-			       mb[i].ptr, mb[i].size);
-			diff_buffer_size += mb[i].size;
-			continue;
-		}
-
-		/* we have a complete line */
-		if (!diff_buffer) {
-			print_line(mb[i].ptr, mb[i].size);
-			continue;
-		}
-		diff_buffer = xrealloc(diff_buffer,
-				       diff_buffer_size + mb[i].size);
-		memcpy(diff_buffer + diff_buffer_size, mb[i].ptr, mb[i].size);
-		print_line(diff_buffer, diff_buffer_size + mb[i].size);
-		free(diff_buffer);
-		diff_buffer = NULL;
-		diff_buffer_size = 0;
-	}
-	if (diff_buffer) {
-		print_line(diff_buffer, diff_buffer_size);
-		free(diff_buffer);
-		diff_buffer = NULL;
-		diff_buffer_size = 0;
-	}
-	return 0;
-}
-
-static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
-{
-	enum object_type type;
-
-	if (is_null_sha1(sha1)) {
-		file->ptr = (char *)"";
-		file->size = 0;
-	} else {
-		file->ptr = read_sha1_file(sha1, &type, &file->size);
-	}
-	return 1;
-}
-
-static void run_diff(const unsigned char *sha1, const unsigned char *sha2)
-{
-	mmfile_t file1, file2;
-	xpparam_t diff_params;
-	xdemitconf_t emit_params;
-	xdemitcb_t emit_cb;
-
-	if (!load_mmfile(&file1, sha1) || !load_mmfile(&file2, sha2)) {
-		cgit_print_error("Unable to load files for diff");
-		return;
-	}
-
-	diff_params.flags = XDF_NEED_MINIMAL;
-
-	emit_params.ctxlen = 3;
-	emit_params.flags = XDL_EMIT_FUNCNAMES;
-
-	emit_cb.outf = diff_cb;
-
-	xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
-}
-
-
-
 void cgit_print_diff(const char *old_hex, const char *new_hex)
 {
 	unsigned char sha1[20], sha2[20];
@@ -124,6 +39,7 @@ void cgit_print_diff(const char *old_hex, const char *new_hex)
 	get_sha1(new_hex, sha2);
 
 	html("<table class='diff'><tr><td>");
-	run_diff(sha1, sha2);
+	if (cgit_diff_files(sha1, sha2, print_line))
+		cgit_print_error("Error running diff");
 	html("</td></tr></table>");
 }