/*

 * regexp.c: a libFuzzer target to test the regexp module.

 *

 * See Copyright for the status of this software.

 */

#include <stdio.h>

#include <stdlib.h>

#include <libxml/xmlregexp.h>

#include "fuzz.h"

int

LLVMFuzzerInitialize(int *argc ATTRIBUTE_UNUSED,

                     char ***argv ATTRIBUTE_UNUSED) {

    xmlFuzzMemSetup();

    return 0;

}

int

LLVMFuzzerTestOneInput(const char *data, size_t size) {

    xmlRegexpPtr regexp;

    size_t failurePos;

    const char *str1;

    if (size > 200)

        return(0);

    xmlFuzzDataInit(data, size);

    failurePos = xmlFuzzReadInt(4) % (size * 8 + 100);

    str1 = xmlFuzzReadString(NULL);

    xmlFuzzInjectFailure(failurePos);

    regexp = xmlRegexpCompile(BAD_CAST str1);

    if (xmlFuzzMallocFailed() && regexp != NULL) {

        fprintf(stderr, "malloc failure not reported\n");

        abort();

    }

    /* xmlRegexpExec has pathological performance in too many cases. */

#if 0

    xmlRegexpExec(regexp, BAD_CAST str2);

#endif

    xmlRegFreeRegexp(regexp);

    xmlFuzzInjectFailure(0);

    xmlFuzzDataCleanup();

    xmlResetLastError();

    return 0;

}

size_t

LLVMFuzzerCustomMutator(char *data, size_t size, size_t maxSize,

                        unsigned seed) {

    static const xmlFuzzChunkDesc chunks[] = {

        { 4, XML_FUZZ_PROB_ONE / 10 }, /* failurePos */

        { 0, 0 }

    };

    return xmlFuzzMutateChunks(chunks, data, size, maxSize, seed,

                               LLVMFuzzerMutate);

}