+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, int context,
+ int ignorews, 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;
+ if (file1.size)
+ free(file1.ptr);
+ if (file2.size)
+ free(file2.ptr);
+ 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;
+ if (ignorews)
+ diff_params.flags |= XDF_IGNORE_WHITESPACE;
+ emit_params.ctxlen = context > 0 ? context : 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);
+ if (file1.size)
+ free(file1.ptr);
+ if (file2.size)
+ free(file2.ptr);
+ return 0;
+}
+
+void cgit_diff_tree(const unsigned char *old_sha1,
+ const unsigned char *new_sha1,
+ filepair_fn fn, const char *prefix, int ignorews)
+{
+ struct diff_options opt;
+ int ret;
+ int prefixlen;
+
+ diff_setup(&opt);
+ opt.output_format = DIFF_FORMAT_CALLBACK;
+ opt.detect_rename = 1;
+ opt.rename_limit = ctx.cfg.renamelimit;
+ DIFF_OPT_SET(&opt, RECURSIVE);
+ if (ignorews)
+ DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
+ opt.format_callback = cgit_diff_tree_cb;
+ opt.format_callback_data = fn;
+ if (prefix) {
+ opt.nr_paths = 1;
+ opt.paths = &prefix;
+ prefixlen = strlen(prefix);
+ opt.pathlens = &prefixlen;
+ }
+ diff_setup_done(&opt);
+
+ if (old_sha1 && !is_null_sha1(old_sha1))
+ ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
+ else
+ ret = diff_root_tree_sha1(new_sha1, "", &opt);
+ diffcore_std(&opt);
+ diff_flush(&opt);
+}
+
+void cgit_diff_commit(struct commit *commit, filepair_fn fn)
+{
+ unsigned char *old_sha1 = NULL;
+
+ if (commit->parents)
+ old_sha1 = commit->parents->item->object.sha1;
+ cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL,
+ ctx.qry.ignorews);
+}
+
+int cgit_parse_snapshots_mask(const char *str)
+{
+ const struct cgit_snapshot_format *f;
+ static const char *delim = " \t,:/|;";
+ int tl, sl, rv = 0;
+
+ /* favor legacy setting */
+ if(atoi(str))
+ return 1;
+ for(;;) {
+ str += strspn(str,delim);
+ tl = strcspn(str,delim);
+ if (!tl)
+ break;
+ for (f = cgit_snapshot_formats; f->suffix; f++) {
+ sl = strlen(f->suffix);
+ if((tl == sl && !strncmp(f->suffix, str, tl)) ||
+ (tl == sl-1 && !strncmp(f->suffix+1, str, tl-1))) {
+ rv |= f->bit;
+ break;
+ }
+ }
+ str += tl;
+ }
+ return rv;
+}
+
+int cgit_open_filter(struct cgit_filter *filter)
+{
+
+ filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
+ "Unable to duplicate STDOUT");
+ chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
+ filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
+ if (filter->pid == 0) {
+ close(filter->pipe_fh[1]);
+ chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
+ "Unable to use pipe as STDIN");
+ execvp(filter->cmd, filter->argv);
+ die("Unable to exec subprocess %s: %s (%d)", filter->cmd,
+ strerror(errno), errno);
+ }
+ close(filter->pipe_fh[0]);
+ chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
+ "Unable to use pipe as STDOUT");
+ close(filter->pipe_fh[1]);
+ return 0;
+}
+
+int cgit_close_filter(struct cgit_filter *filter)
+{
+ chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
+ "Unable to restore STDOUT");
+ close(filter->old_stdout);
+ if (filter->pid < 0)
+ return 0;
+ waitpid(filter->pid, &filter->exitstatus, 0);
+ if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus))
+ return 0;
+ die("Subprocess %s exited abnormally", filter->cmd);
+}
+
+/* Read the content of the specified file into a newly allocated buffer,
+ * zeroterminate the buffer and return 0 on success, errno otherwise.
+ */
+int readfile(const char *path, char **buf, size_t *size)
+{
+ int fd, e;
+ struct stat st;
+
+ fd = open(path, O_RDONLY);
+ if (fd == -1)
+ return errno;
+ if (fstat(fd, &st)) {
+ e = errno;
+ close(fd);
+ return e;
+ }
+ if (!S_ISREG(st.st_mode)) {
+ close(fd);
+ return EISDIR;
+ }
+ *buf = xmalloc(st.st_size + 1);
+ *size = read_in_full(fd, *buf, st.st_size);
+ e = errno;
+ (*buf)[*size] = '\0';
+ close(fd);
+ return (*size == st.st_size ? 0 : e);
+}
+
+int is_token_char(char c)
+{
+ return isalnum(c) || c == '_';
+}
+
+/* Replace name with getenv(name), return pointer to zero-terminating char
+ */
+char *expand_macro(char *name, int maxlength)
+{
+ char *value;
+ int len;
+
+ len = 0;
+ value = getenv(name);
+ if (value) {
+ len = strlen(value);
+ if (len > maxlength)
+ len = maxlength;
+ strncpy(name, value, len);
+ }
+ return name + len;
+}
+
+#define EXPBUFSIZE (1024 * 8)
+
+/* Replace all tokens prefixed by '$' in the specified text with the
+ * value of the named environment variable.
+ * NB: the return value is a static buffer, i.e. it must be strdup'd
+ * by the caller.
+ */
+char *expand_macros(const char *txt)
+{
+ static char result[EXPBUFSIZE];
+ char *p, *start;
+ int len;
+
+ p = result;
+ start = NULL;
+ while (p < result + EXPBUFSIZE - 1 && txt && *txt) {
+ *p = *txt;
+ if (start) {
+ if (!is_token_char(*txt)) {
+ if (p - start > 0) {
+ *p = '\0';
+ len = result + EXPBUFSIZE - start - 1;
+ p = expand_macro(start, len) - 1;
+ }
+ start = NULL;
+ txt--;
+ }
+ p++;
+ txt++;
+ continue;
+ }
+ if (*txt == '$') {
+ start = p;
+ txt++;
+ continue;
+ }
+ p++;
+ txt++;
+ }
+ *p = '\0';
+ if (start && p - start > 0) {
+ len = result + EXPBUFSIZE - start - 1;
+ p = expand_macro(start, len);
+ *p = '\0';
+ }
+ return result;
+}
git.ckatri.com / cgit.git / blobdiff