// SPDX-License-Identifier: ISC/* * Fuzz target for md_render(). Feeds arbitrary bytes into the * markdown parser. Looks for crashes, hangs, or memory errors. * * Build: link fuzz_md.c + src/md_render.c + md4c. */#include <stddef.h>#include <stdint.h> struct md_run {	unsigned style;	const char *text;	size_t len;}; enum md_table_style {	MD_TABLE_AUTO = 0,	MD_TABLE_UNICODE,	MD_TABLE_ASCII,	MD_TABLE_PLAIN,}; struct md_opts {	int width;	enum md_table_style tables;}; int md_render(const char *md, size_t len, const struct md_opts *opts,    void (*emit)(const struct md_run *run, void *userdata), void *userdata); static voidsink_emit(const struct md_run *run, void *userdata){	(void)run;	(void)userdata;} int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size); intLLVMFuzzerTestOneInput(const uint8_t *data, size_t size){	struct md_opts opts = {.width = 80, .tables = MD_TABLE_PLAIN}; 	if (size == 0)		return 0; 	md_render((const char *)data, size, &opts, sink_emit, NULL); 	opts.tables = MD_TABLE_ASCII;	md_render((const char *)data, size, &opts, sink_emit, NULL); 	opts.tables = MD_TABLE_UNICODE;	md_render((const char *)data, size, &opts, sink_emit, NULL); 	opts.width = 1;	md_render((const char *)data, size, &opts, sink_emit, NULL); 	return 0;}