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DNSClient/pico_string.h@0:e11e8793c3ce, 2014-08-20 (annotated)

Committer:
Bongjun
Date:
Wed Aug 20 00:28:37 2014 +0000
Revision:
0:e11e8793c3ce
first release.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Bongjun 0:e11e8793c3ce 1 // pico_string.h 2013/8/27
Bongjun 0:e11e8793c3ce 2 #pragma once
Bongjun 0:e11e8793c3ce 3 class pico_string {
Bongjun 0:e11e8793c3ce 4 public:
Bongjun 0:e11e8793c3ce 5 pico_string(){
Bongjun 0:e11e8793c3ce 6 _len = 0;
Bongjun 0:e11e8793c3ce 7 _buf = (char*)malloc(1);
Bongjun 0:e11e8793c3ce 8 if (_buf) {
Bongjun 0:e11e8793c3ce 9 _buf[0] = '\0';
Bongjun 0:e11e8793c3ce 10 }
Bongjun 0:e11e8793c3ce 11 }
Bongjun 0:e11e8793c3ce 12 ~pico_string() {
Bongjun 0:e11e8793c3ce 13 if (_buf) {
Bongjun 0:e11e8793c3ce 14 free(_buf);
Bongjun 0:e11e8793c3ce 15 }
Bongjun 0:e11e8793c3ce 16 }
Bongjun 0:e11e8793c3ce 17 bool empty() {
Bongjun 0:e11e8793c3ce 18 return _len == 0;
Bongjun 0:e11e8793c3ce 19 }
Bongjun 0:e11e8793c3ce 20 void append(const char* s, int len) {
Bongjun 0:e11e8793c3ce 21 if (_buf == NULL) {
Bongjun 0:e11e8793c3ce 22 return;
Bongjun 0:e11e8793c3ce 23 }
Bongjun 0:e11e8793c3ce 24 char* p = (char*)malloc(_len+len+1);
Bongjun 0:e11e8793c3ce 25 if (p == NULL) {
Bongjun 0:e11e8793c3ce 26 return;
Bongjun 0:e11e8793c3ce 27 }
Bongjun 0:e11e8793c3ce 28 memcpy(p, _buf, _len);
Bongjun 0:e11e8793c3ce 29 memcpy(p+_len, s, len);
Bongjun 0:e11e8793c3ce 30 p[_len+len] = '\0';
Bongjun 0:e11e8793c3ce 31 free(_buf);
Bongjun 0:e11e8793c3ce 32 _buf = p;
Bongjun 0:e11e8793c3ce 33 }
Bongjun 0:e11e8793c3ce 34 void append(const char* s) {
Bongjun 0:e11e8793c3ce 35 append(s, strlen(s));
Bongjun 0:e11e8793c3ce 36 }
Bongjun 0:e11e8793c3ce 37 char* c_str() {
Bongjun 0:e11e8793c3ce 38 if (_buf) {
Bongjun 0:e11e8793c3ce 39 return _buf;
Bongjun 0:e11e8793c3ce 40 }
Bongjun 0:e11e8793c3ce 41 return "";
Bongjun 0:e11e8793c3ce 42 }
Bongjun 0:e11e8793c3ce 43 private:
Bongjun 0:e11e8793c3ce 44 char* _buf;
Bongjun 0:e11e8793c3ce 45 int _len;
Bongjun 0:e11e8793c3ce 46 };