+/* Remove empty lines. */
+static char **collapse(char **lines, unsigned int *nump)
+{
+ unsigned int i, j;
+ for (i = j = 0; lines[i]; i++) {
+ if (lines[i][0])
+ lines[j++] = lines[i];
+ }
+ lines[j] = NULL;
+ if (nump)
+ *nump = j;
+ return lines;
+}
+
+
+static void add_options(struct ccanlint *test, char **options,
+ unsigned int num_options)
+{
+ unsigned int num;
+
+ if (!test->options)
+ num = 0;
+ else
+ /* -1, because last one is NULL. */
+ num = talloc_array_length(test->options) - 1;
+
+ test->options = talloc_realloc(NULL, test->options,
+ char *,
+ num + num_options + 1);
+ memcpy(&test->options[num], options, (num_options + 1)*sizeof(char *));
+}
+
+void add_info_options(struct ccan_file *info)
+{
+ struct doc_section *d;
+ unsigned int i;
+ struct ccanlint *test;
+
+ list_for_each(get_ccan_file_docs(info), d, list) {
+ if (!streq(d->type, "ccanlint"))
+ continue;
+
+ for (i = 0; i < d->num_lines; i++) {
+ unsigned int num_words;
+ char **words = collapse(strsplit(d, d->lines[i], " \t"),
+ &num_words);
+ if (num_words == 0)
+ continue;
+
+ if (strncmp(words[0], "//", 2) == 0)
+ continue;
+
+ test = find_test(words[0]);
+ if (!test) {
+ warnx("%s: unknown ccanlint test '%s'",
+ info->fullname, words[0]);
+ continue;
+ }
+
+ if (!words[1]) {
+ warnx("%s: no argument to test '%s'",
+ info->fullname, words[0]);
+ continue;
+ }
+
+ /* Known failure? */
+ if (strcasecmp(words[1], "FAIL") == 0) {
+ if (!targeting)
+ btree_insert(info_exclude, words[0]);
+ } else {
+ if (!test->takes_options)
+ warnx("%s: %s doesn't take options",
+ info->fullname, words[0]);
+ add_options(test, words+1, num_words-1);
+ }
+ }
+ }
+}
+
+/* If options are of form "filename:<option>" they only apply to that file */
+char **per_file_options(const struct ccanlint *test, struct ccan_file *f)
+{
+ char **ret;
+ unsigned int i, j = 0;
+
+ /* Fast path. */
+ if (!test->options[0])
+ return test->options;
+
+ ret = talloc_array(f, char *, talloc_array_length(test->options));
+ for (i = 0; test->options[i]; i++) {
+ char *optname;
+
+ if (!test->options[i] || !strchr(test->options[i], ':')) {
+ optname = test->options[i];
+ } else if (strstarts(test->options[i], f->name)
+ && test->options[i][strlen(f->name)] == ':') {
+ optname = test->options[i] + strlen(f->name) + 1;
+ } else
+ continue;
+
+ /* FAIL overrides anything else. */
+ if (streq(optname, "FAIL")) {
+ ret = talloc_array(f, char *, 2);
+ ret[0] = (char *)"FAIL";
+ ret[1] = NULL;
+ return ret;
+ }
+ ret[j++] = optname;
+ }
+ ret[j] = NULL;
+
+ /* Shrink it to size so talloc_array_length() works as expected. */
+ return talloc_realloc(NULL, ret, char *, j + 1);
+}
+
+static char *demangle_string(char *string)
+{
+ unsigned int i;
+ const char mapfrom[] = "abfnrtv";
+ const char mapto[] = "\a\b\f\n\r\t\v";
+
+ if (!strchr(string, '"'))
+ return NULL;
+ string = strchr(string, '"') + 1;
+ if (!strrchr(string, '"'))
+ return NULL;
+ *strrchr(string, '"') = '\0';
+
+ for (i = 0; i < strlen(string); i++) {
+ if (string[i] == '\\') {
+ char repl;
+ unsigned len = 0;
+ const char *p = strchr(mapfrom, string[i+1]);
+ if (p) {
+ repl = mapto[p - mapfrom];
+ len = 1;
+ } else if (strlen(string+i+1) >= 3) {
+ if (string[i+1] == 'x') {
+ repl = (string[i+2]-'0')*16
+ + string[i+3]-'0';
+ len = 3;
+ } else if (cisdigit(string[i+1])) {
+ repl = (string[i+2]-'0')*8*8
+ + (string[i+3]-'0')*8
+ + (string[i+4]-'0');
+ len = 3;
+ }
+ }
+ if (len == 0) {
+ repl = string[i+1];
+ len = 1;
+ }
+
+ string[i] = repl;
+ memmove(string + i + 1, string + i + len + 1,
+ strlen(string + i + len + 1) + 1);
+ }
+ }
+
+ return string;
+}
+
+
+static void read_config_header(void)
+{
+ char *fname = talloc_asprintf(NULL, "%s/config.h", ccan_dir);
+ char **lines;
+ unsigned int i;
+
+ config_header = grab_file(NULL, fname, NULL);
+ if (!config_header) {
+ talloc_free(fname);
+ return;
+ }
+
+ lines = strsplit(config_header, config_header, "\n");
+ for (i = 0; i < talloc_array_length(lines) - 1; i++) {
+ char *sym;
+ const char **line = (const char **)&lines[i];
+
+ if (!get_token(line, "#"))
+ continue;
+ if (!get_token(line, "define"))
+ continue;
+ sym = get_symbol_token(lines, line);
+ if (streq(sym, "CCAN_COMPILER") && !compiler) {
+ compiler = demangle_string(lines[i]);
+ if (!compiler)
+ errx(1, "%s:%u:could not parse CCAN_COMPILER",
+ fname, i+1);
+ if (verbose > 1)
+ printf("%s: compiler set to '%s'\n",
+ fname, compiler);
+ } else if (streq(sym, "CCAN_CFLAGS") && !cflags) {
+ cflags = demangle_string(lines[i]);
+ if (!cflags)
+ errx(1, "%s:%u:could not parse CCAN_CFLAGS",
+ fname, i+1);
+ if (verbose > 1)
+ printf("%s: compiler flags set to '%s'\n",
+ fname, cflags);
+ }
+ }
+ if (!compiler)
+ compiler = CCAN_COMPILER;
+ if (!cflags)
+ compiler = CCAN_CFLAGS;
+}
+
+static char *opt_set_const_charp(const char *arg, const char **p)
+{
+ return opt_set_charp(arg, cast_const2(char **, p));
+}
+
+static bool should_run_ccanlint(const char *name, struct ccanlint *c,
+ void *unused)
+{
+ c->should_run = true;
+ return true;
+}
+
+static bool should_run_node(struct dgraph_node *to, void *unused)
+{
+ should_run_ccanlint(NULL, container_of(to, struct ccanlint, node),
+ unused);
+ return true;
+}
+
+static char *add_target(const char *arg, bool *targeting)
+{
+ struct ccanlint *c = find_test(arg);
+ if (!c)
+ return talloc_asprintf(NULL, "Unknown test %s", arg);
+
+ dgraph_traverse_to(&c->node, should_run_node, NULL);
+ *targeting = true;
+ return NULL;
+}
+