static int append_buf(char **buf, const char *s, int *size, int step)
{
    if (*buf == NULL) {
        *size = step;
        *buf = app_malloc(*size, "engine buffer");
        **buf = '\0';
    }
    if (strlen(*buf) + strlen(s) >= (unsigned int)*size) {
        *size += step;
        *buf = OPENSSL_realloc(*buf, *size);
    }
    if (*buf == NULL)
        return 0;
    if (**buf != '\0')
        OPENSSL_strlcat(*buf, ", ", *size);
    OPENSSL_strlcat(*buf, s, *size);
    return 1;
}
['static int append_buf(char **buf, const char *s, int *size, int step)\n{\n    if (*buf == NULL) {\n        *size = step;\n        *buf = app_malloc(*size, "engine buffer");\n        **buf = \'\\0\';\n    }\n    if (strlen(*buf) + strlen(s) >= (unsigned int)*size) {\n        *size += step;\n        *buf = OPENSSL_realloc(*buf, *size);\n    }\n    if (*buf == NULL)\n        return 0;\n    if (**buf != \'\\0\')\n        OPENSSL_strlcat(*buf, ", ", *size);\n    OPENSSL_strlcat(*buf, s, *size);\n    return 1;\n}', 'void* app_malloc(int sz, const char *what)\n{\n    void *vp = OPENSSL_malloc(sz);\n    if (vp == NULL) {\n        BIO_printf(bio_err, "%s: Could not allocate %d bytes for %s\\n",\n                opt_getprog(), sz, what);\n        ERR_print_errors(bio_err);\n        exit(1);\n    }\n    return vp;\n}', 'void *CRYPTO_malloc(size_t num, const char *file, int line)\n{\n    void *ret = NULL;\n    if (num <= 0)\n        return NULL;\n    allow_customize = 0;\n#ifndef OPENSSL_NO_CRYPTO_MDEBUG\n    if (call_malloc_debug) {\n        CRYPTO_mem_debug_malloc(NULL, num, 0, file, line);\n        ret = malloc(num);\n        CRYPTO_mem_debug_malloc(ret, num, 1, file, line);\n    } else {\n        ret = malloc(num);\n    }\n#else\n    (void)file;\n    (void)line;\n    ret = malloc(num);\n#endif\n#ifndef OPENSSL_CPUID_OBJ\n    if (ret && (num > 2048)) {\n        extern unsigned char cleanse_ctr;\n        ((unsigned char *)ret)[0] = cleanse_ctr;\n    }\n#endif\n    return ret;\n}', 'void *CRYPTO_realloc(void *str, size_t num, const char *file, int line)\n{\n    if (str == NULL)\n        return CRYPTO_malloc(num, file, line);\n    if (num == 0) {\n        CRYPTO_free(str);\n        return NULL;\n    }\n    allow_customize = 0;\n#ifndef OPENSSL_NO_CRYPTO_MDEBUG\n    if (call_malloc_debug) {\n        void *ret;\n        CRYPTO_mem_debug_realloc(str, NULL, num, 0, file, line);\n        ret = realloc(str, num);\n        CRYPTO_mem_debug_realloc(str, ret, num, 1, file, line);\n        return ret;\n    }\n#else\n    (void)file;\n    (void)line;\n#endif\n    return realloc(str, num);\n}']