Donald Meyers / Mbed OS evan

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

mbed-client/source/m2mstringbufferbase.cpp@0:06ee5f8a484a, 2017-03-18 (annotated)

Committer:
djmeyers
Date:
Sat Mar 18 22:37:16 2017 +0000
Revision:
0:06ee5f8a484a
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
djmeyers 0:06ee5f8a484a 1 /*
djmeyers 0:06ee5f8a484a 2 * Copyright (c) 2016 ARM Limited. All rights reserved.
djmeyers 0:06ee5f8a484a 3 * SPDX-License-Identifier: Apache-2.0
djmeyers 0:06ee5f8a484a 4 * Licensed under the Apache License, Version 2.0 (the License); you may
djmeyers 0:06ee5f8a484a 5 * not use this file except in compliance with the License.
djmeyers 0:06ee5f8a484a 6 * You may obtain a copy of the License at
djmeyers 0:06ee5f8a484a 7 *
djmeyers 0:06ee5f8a484a 8 * http://www.apache.org/licenses/LICENSE-2.0
djmeyers 0:06ee5f8a484a 9 *
djmeyers 0:06ee5f8a484a 10 * Unless required by applicable law or agreed to in writing, software
djmeyers 0:06ee5f8a484a 11 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
djmeyers 0:06ee5f8a484a 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
djmeyers 0:06ee5f8a484a 13 * See the License for the specific language governing permissions and
djmeyers 0:06ee5f8a484a 14 * limitations under the License.
djmeyers 0:06ee5f8a484a 15 */
djmeyers 0:06ee5f8a484a 16
djmeyers 0:06ee5f8a484a 17 #include "mbed-client/m2mstringbufferbase.h"
djmeyers 0:06ee5f8a484a 18
djmeyers 0:06ee5f8a484a 19 #include "mbed-client/m2mstring.h"
djmeyers 0:06ee5f8a484a 20
djmeyers 0:06ee5f8a484a 21 #include <assert.h>
djmeyers 0:06ee5f8a484a 22 #include <string.h>
djmeyers 0:06ee5f8a484a 23
djmeyers 0:06ee5f8a484a 24
djmeyers 0:06ee5f8a484a 25 bool StringBufferBase::ensure_space(size_t max_size, size_t required_size) const
djmeyers 0:06ee5f8a484a 26 {
djmeyers 0:06ee5f8a484a 27 const size_t space_left = max_size - _curr_size;
djmeyers 0:06ee5f8a484a 28
djmeyers 0:06ee5f8a484a 29 bool space_available = false;
djmeyers 0:06ee5f8a484a 30
djmeyers 0:06ee5f8a484a 31 if (required_size <= space_left) {
djmeyers 0:06ee5f8a484a 32
djmeyers 0:06ee5f8a484a 33 space_available = true;
djmeyers 0:06ee5f8a484a 34 }
djmeyers 0:06ee5f8a484a 35 return space_available;
djmeyers 0:06ee5f8a484a 36 }
djmeyers 0:06ee5f8a484a 37
djmeyers 0:06ee5f8a484a 38 bool StringBufferBase::append(char *buff, size_t max_size, char data)
djmeyers 0:06ee5f8a484a 39 {
djmeyers 0:06ee5f8a484a 40 bool space_available = ensure_space(max_size, 1 + 1); // there must be space for trailing zero too
djmeyers 0:06ee5f8a484a 41 if (space_available) {
djmeyers 0:06ee5f8a484a 42 buff[_curr_size++] = data;
djmeyers 0:06ee5f8a484a 43 buff[_curr_size] = '\0';
djmeyers 0:06ee5f8a484a 44 assert(_curr_size < max_size);
djmeyers 0:06ee5f8a484a 45 }
djmeyers 0:06ee5f8a484a 46 return space_available;
djmeyers 0:06ee5f8a484a 47 }
djmeyers 0:06ee5f8a484a 48
djmeyers 0:06ee5f8a484a 49 bool StringBufferBase::append(char *buff, size_t max_size, const char *data)
djmeyers 0:06ee5f8a484a 50 {
djmeyers 0:06ee5f8a484a 51
djmeyers 0:06ee5f8a484a 52 const size_t string_len = strlen(data);
djmeyers 0:06ee5f8a484a 53 bool space_available = ensure_space(max_size, string_len + 1);
djmeyers 0:06ee5f8a484a 54 if (space_available) {
djmeyers 0:06ee5f8a484a 55 memcpy(buff + _curr_size, data, string_len + 1); // copy the zero terminator too
djmeyers 0:06ee5f8a484a 56 _curr_size += string_len;
djmeyers 0:06ee5f8a484a 57 assert(_curr_size < max_size);
djmeyers 0:06ee5f8a484a 58 }
djmeyers 0:06ee5f8a484a 59 return space_available;
djmeyers 0:06ee5f8a484a 60 }
djmeyers 0:06ee5f8a484a 61
djmeyers 0:06ee5f8a484a 62 bool StringBufferBase::append(char *buff, size_t max_size, const char *data, size_t data_len)
djmeyers 0:06ee5f8a484a 63 {
djmeyers 0:06ee5f8a484a 64 bool space_available = true;
djmeyers 0:06ee5f8a484a 65 if (data_len > 0) {
djmeyers 0:06ee5f8a484a 66 space_available = ensure_space(max_size, data_len + 1);
djmeyers 0:06ee5f8a484a 67 if (space_available) {
djmeyers 0:06ee5f8a484a 68 memcpy(buff + _curr_size, data, data_len);
djmeyers 0:06ee5f8a484a 69 _curr_size += data_len;
djmeyers 0:06ee5f8a484a 70 // Todo: should the code actually check, if the data already contained zero or not?
djmeyers 0:06ee5f8a484a 71 buff[_curr_size] = '\0';
djmeyers 0:06ee5f8a484a 72 assert(_curr_size < max_size);
djmeyers 0:06ee5f8a484a 73 }
djmeyers 0:06ee5f8a484a 74 }
djmeyers 0:06ee5f8a484a 75 return space_available;
djmeyers 0:06ee5f8a484a 76 }
djmeyers 0:06ee5f8a484a 77
djmeyers 0:06ee5f8a484a 78 bool StringBufferBase::append_int(char *buff, size_t max_size, uint16_t data)
djmeyers 0:06ee5f8a484a 79 {
djmeyers 0:06ee5f8a484a 80 // max len of "-9223372036854775808" plus zero termination
djmeyers 0:06ee5f8a484a 81 char conv_buff[20+1];
djmeyers 0:06ee5f8a484a 82
djmeyers 0:06ee5f8a484a 83 // re-use the String's functionality, a more optimal version would use snprintf() or int size specific converter
djmeyers 0:06ee5f8a484a 84 int len = m2m::itoa_c(data, conv_buff);
djmeyers 0:06ee5f8a484a 85
djmeyers 0:06ee5f8a484a 86 return append(buff, max_size, conv_buff, len);
djmeyers 0:06ee5f8a484a 87 }
djmeyers 0:06ee5f8a484a 88
djmeyers 0:06ee5f8a484a 89 int StringBufferBase::find_last_of(const char *buff, char search_char) const
djmeyers 0:06ee5f8a484a 90 {
djmeyers 0:06ee5f8a484a 91 int last_index = -1;
djmeyers 0:06ee5f8a484a 92 // search from the end of string, return upon first found matching char
djmeyers 0:06ee5f8a484a 93 for (int index = _curr_size; index >= 0; index--) {
djmeyers 0:06ee5f8a484a 94 if (buff[index] == search_char) {
djmeyers 0:06ee5f8a484a 95 last_index = index;
djmeyers 0:06ee5f8a484a 96 break;
djmeyers 0:06ee5f8a484a 97 }
djmeyers 0:06ee5f8a484a 98 }
djmeyers 0:06ee5f8a484a 99
djmeyers 0:06ee5f8a484a 100 return last_index;
djmeyers 0:06ee5f8a484a 101 }