1 /* Copyright (c) 2013 The Chromium Authors. All rights reserved. 2 * Use of this source code is governed by a BSD-style license that can be 3 * found in the LICENSE file. */ 4 5 #include <stdlib.h> 6 #include <stdio.h> 7 #include <string.h> 8 9 #include "error_handling/string_stream.h" 10 void ssinit(sstream_t* stream) { 11 stream->data = NULL; 12 stream->length = 0; 13 } 14 15 void ssfree(sstream_t* stream) { 16 free(stream->data); 17 stream->data = 0; 18 stream->length = 0; 19 } 20 21 int ssvprintf(sstream_t* stream, const char* format, va_list args) { 22 va_list hold; 23 int len; 24 char* outstr; 25 26 va_copy(hold, args); 27 len = vsnprintf(NULL, 0, format, args); 28 29 outstr = malloc(stream->length + len + 1); 30 if (stream->data) { 31 memcpy(outstr, stream->data, stream->length); 32 free(stream->data); 33 } 34 35 stream->data = outstr; 36 vsprintf(&stream->data[stream->length], format, hold); 37 stream->length += len; 38 39 return len; 40 } 41 42 int ssprintf(sstream_t* stream, const char* format, ...) { 43 int out; 44 va_list args; 45 va_start(args, format); 46 out = ssvprintf(stream, format, args); 47 va_end(args); 48 49 return out; 50 } 51
