+char *trim_end(const char *str, char c)
+{
+ int len;
+ char *s, *t;
+
+ if (str == NULL)
+ return NULL;
+ t = (char *)str;
+ len = strlen(t);
+ while(len > 0 && t[len - 1] == c)
+ len--;
+
+ if (len == 0)
+ return NULL;
+
+ c = t[len];
+ t[len] = '\0';
+ s = xstrdup(t);
+ t[len] = c;
+ return s;
+}
+
+char *strlpart(char *txt, int maxlen)
+{
+ char *result;
+
+ if (!txt)
+ return txt;
+
+ if (strlen(txt) <= maxlen)
+ return txt;
+ result = xmalloc(maxlen + 1);
+ memcpy(result, txt, maxlen - 3);
+ result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
+ result[maxlen] = '\0';
+ return result;
+}
+
+char *strrpart(char *txt, int maxlen)
+{
+ char *result;
+
+ if (!txt)
+ return txt;
+
+ if (strlen(txt) <= maxlen)
+ return txt;
+ result = xmalloc(maxlen + 1);
+ memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
+ result[0] = result[1] = result[2] = '.';
+ return result;
+}
+
+void cgit_add_ref(struct reflist *list, struct refinfo *ref)
+{
+ size_t size;
+
+ if (list->count >= list->alloc) {
+ list->alloc += (list->alloc ? list->alloc : 4);
+ size = list->alloc * sizeof(struct refinfo *);
+ list->refs = xrealloc(list->refs, size);
+ }
+ list->refs[list->count++] = ref;
+}
+
+struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
+{
+ struct refinfo *ref;
+
+ ref = xmalloc(sizeof (struct refinfo));
+ ref->refname = xstrdup(refname);
+ ref->object = parse_object(sha1);
+ switch (ref->object->type) {
+ case OBJ_TAG:
+ ref->tag = cgit_parse_tag((struct tag *)ref->object);
+ break;
+ case OBJ_COMMIT:
+ ref->commit = cgit_parse_commit((struct commit *)ref->object);
+ break;
+ }
+ return ref;
+}
+
+int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
+ void *cb_data)
+{
+ struct reflist *list = (struct reflist *)cb_data;
+ struct refinfo *info = cgit_mk_refinfo(refname, sha1);
+
+ if (info)
+ cgit_add_ref(list, info);
+ return 0;
+}
+
+void cgit_diff_tree_cb(struct diff_queue_struct *q,
+ struct diff_options *options, void *data)
+{
+ int i;
+
+ for (i = 0; i < q->nr; i++) {
+ if (q->queue[i]->status == 'U')
+ continue;
+ ((filepair_fn)data)(q->queue[i]);
+ }
+}
+
+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,
+ (unsigned long *)&file->size);
+ }
+ return 1;
+}
+
+/*
+ * 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.
+ */
+char *diffbuf = NULL;
+int buflen = 0;
+
+int filediff_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 */
+ diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
+ memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
+ buflen += mb[i].size;
+ continue;
+ }
+
+ /* we have a complete line */
+ if (!diffbuf) {
+ ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
+ continue;
+ }
+ diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
+ memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
+ ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
+ free(diffbuf);
+ diffbuf = NULL;
+ buflen = 0;
+ }
+ if (diffbuf) {
+ ((linediff_fn)priv)(diffbuf, buflen);
+ free(diffbuf);
+ diffbuf = NULL;
+ buflen = 0;
+ }
+ return 0;
+}
+
+int cgit_diff_files(const unsigned char *old_sha1,
+ const unsigned char *new_sha1, unsigned long *old_size,
+ unsigned long *new_size, int *binary, linediff_fn fn)
+{
+ mmfile_t file1, file2;
+ xpparam_t diff_params;
+ xdemitconf_t emit_params;
+ xdemitcb_t emit_cb;
+
+ if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
+ return 1;
+
+ *old_size = file1.size;
+ *new_size = file2.size;
+
+ if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
+ (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
+ *binary = 1;
+ return 0;
+ }
+
+ memset(&diff_params, 0, sizeof(diff_params));
+ memset(&emit_params, 0, sizeof(emit_params));
+ memset(&emit_cb, 0, sizeof(emit_cb));
+ diff_params.flags = XDF_NEED_MINIMAL;
+ emit_params.ctxlen = 3;
+ emit_params.flags = XDL_EMIT_FUNCNAMES;
+ emit_cb.outf = filediff_cb;
+ emit_cb.priv = fn;
+ xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
+ return 0;
+}
+
+void cgit_diff_tree(const unsigned char *old_sha1,
+ const unsigned char *new_sha1,
+ filepair_fn fn, const char *prefix)
git.ckatri.com / cgit.git / blobdiff