Function parse_report_format

plugins/bkpr/report.c:243–351

alt_term is a secondary loop terminator (in addition to term); '\0' means none. */

/* alt_term is a secondary loop terminator (in addition to term); '\0' means none. */
static struct report_format *
parse_report_format(const tal_t *ctx,
		    const char **start,
		    char term,
		    char alt_term,
		    const char **err)
{
	const char *p;
	struct report_format *f;

	f = tal(ctx, struct report_format);
	f->fmt = tal_arr(f, typeof(*f->fmt), 0);
	f->str = tal_arr(f, const char *, 0);
	f->ifset = tal_arr(f, struct report_format *, 0);
	f->ifnotset = tal_arr(f, struct report_format *, 0);

	p = *start;
	while (*p != term && !(alt_term && *p == alt_term)) {
		struct report_format *ifset, *ifnotset;
		const struct report_tag *rt;

		if (*p == '\0') {
			*err = tal_fmt(ctx, "Unterminated tag");
			return tal_free(f);
		}

		if (*p != '{') {
			p++;
			continue;
		}

		/* Escaped '{{' => literal '{' */
		if (p[1] != term && p[1] == '{') {
			char *lit;

			lit = tal_strndup(f->str, *start, p - *start);
			lit = tal_strcat(tmpctx, take(lit), "{");
			tal_arr_expand(&f->fmt, NULL);
			tal_arr_expand(&f->str, lit);
			tal_arr_expand(&f->ifset, NULL);
			tal_arr_expand(&f->ifnotset, NULL);
			p += 2;
			*start = p;
			continue;
		}

		/* Emit preceding literal, if any. */
		add_literal(f, start, p);

		const char *endtag = p + 1 + strcspn(p+1, "?:}");
		if (*endtag == '\0') {
			*err = tal_fmt(ctx, "Unterminated tag %s", p + 1);
			return tal_free(f);
		}

		rt = find_report_tag(p + 1, endtag - (p + 1));
		if (!rt) {
			*err = tal_fmt(ctx,