C++ (Cpp) r_str_appendlen Examples

Example #1

File: grep.c Project: tutamuniz/radare2

/*
 * Removes grep part from *cmd* and returns newly allocated string
 * with reshaped grep expression.
 *
 * Function converts multiple twiddle expressions into internal representation.
 * For example:
 * converts "~str1~str2~str3~?" into "?&str1,str2,str3"
 */
static char *preprocess_filter_expr(char *cmd, const char *quotes) {
	char *p1, *p2, *ns = NULL;
	const char *strsep = "&";
	int len;
	int i;

	p1 = find_next_intgrep (cmd, quotes);
	if (!p1) {
		return NULL;
	}

	len = strlen (p1);
	if (len > 4 && r_str_endswith (p1, "~?") && p1[len - 3] != '\\') {
		p1[len - 2] = '\0';
		ns = r_str_append (ns, "?");
	}

	*p1 = '\0'; // remove grep part from cmd

	i = 0;
	// parse words between '~'
	while ((p2 = find_next_intgrep (p1 + 1, quotes))) {
		ns = r_str_append (ns, strsep);
		ns = r_str_appendlen (ns, p1 + 1, (int)(p2 - p1 - 1));
		p1 = p2;
		strsep = ",";
		i++;
	}

	if (i > 0) {
		ns = r_str_append (ns, ",");
	}

	ns = r_str_append (ns, p1 + 1);

	return ns;
}

Example #2

File: profile.c Project: Maijin/radare2

R_API int r_reg_set_profile_string(RReg *reg, const char *str) {
	char *tok[PARSER_MAX_TOKENS];
	char tmp[128];
	int i, j, l;
	const char *p = str;

	if (!reg || !str) {
		return false;
	}

	// Same profile, no need to change
	if (reg->reg_profile_str && !strcmp (reg->reg_profile_str, str)) {
		return true;
	}

	// we should reset all the arenas before setting the new reg profile
	r_reg_arena_pop (reg);
	// Purge the old registers
	r_reg_free_internal (reg, true);
	r_reg_arena_shrink (reg);

	// Cache the profile string
	reg->reg_profile_str = strdup (str);

	// Line number
	l = 0;
	// For every line
	do {
		// Increment line number
		l++;
		// Skip comment lines
		if (*p == '#') {
			const char *q = p;
			while (*q != '\n') {
				q++;
			}
			reg->reg_profile_cmt = r_str_appendlen (
				reg->reg_profile_cmt, p, (int)(q - p) + 1);
			p = q;
			continue;
		}
		j = 0;
		// For every word
		while (*p) {
			// Skip the whitespace
			while (*p == ' ' || *p == '\t') {
				p++;
			}
			// Skip the rest of the line is a comment is encountered
			if (*p == '#') {
				while (*p != '\n') {
					p++;
				}
			}
			// EOL ?
			if (*p == '\n') {
				break;
			}
			// Gather a handful of chars
			// Use isgraph instead of isprint because the latter considers ' ' printable
			for (i = 0; isgraph ((const unsigned char)*p) && i < sizeof (tmp) - 1;) {
				tmp[i++] = *p++;
			}
			tmp[i] = '\0';
			// Limit the number of tokens
			if (j > PARSER_MAX_TOKENS - 1) {
				break;
			}
			// Save the token
			tok[j++] = strdup (tmp);
		}
		// Empty line, eww
		if (j) {
			// Do the actual parsing
			char *first = tok[0];
			// Check whether it's defining an alias or a register
			const char *r = (*first == '=')
				? parse_alias (reg, tok, j)
				: parse_def (reg, tok, j);
			// Clean up
			for (i = 0; i < j; i++) {
				free (tok[i]);
			}
			// Warn the user if something went wrong
			if (r) {
				eprintf ("%s: Parse error @ line %d (%s)\n",
					__FUNCTION__, l, r);
				//eprintf ("(%s)\n", str);
				// Clean up
				r_reg_free_internal (reg, false);
				return false;
			}
		}
	} while (*p++);
	reg->size = 0;
	for (i = 0; i < R_REG_TYPE_LAST; i++) {
		RRegSet *rs = &reg->regset[i];
		//eprintf ("* arena %s size %d\n", r_reg_get_type (i), rs->arena->size);
		reg->size += rs->arena->size;

	}
	// Align to byte boundary if needed
	//if (reg->size & 7) {
	//	reg->size += 8 - (reg->size & 7);
	//}
	//reg->size >>= 3; // bits to bytes (divide by 8)
	r_reg_fit_arena (reg);
	// dup the last arena to allow regdiffing
	r_reg_arena_push (reg);
	r_reg_reindex (reg);
	// reset arenas
	return true;
}