Rudy Raab / WIZ820ioInterface

Revised to prevent DHCPClient::discover from hanging.

Fork of WIZ820ioInterface by ban4jp -

pico_string.h@9:c1722862c13b, 2014-08-15 (annotated)

Committer:
rraab
Date:
Fri Aug 15 19:53:25 2014 +0000
Revision:
9:c1722862c13b
Parent:
6:c466db1cd20b 
Fixed DHCPClient::discover calling rand, which hangs in an infinite loop.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ban4jp 6:c466db1cd20b 1 // pico_string.h 2013/8/27
va009039 5:fb15c35d1e28 2 #pragma once
va009039 5:fb15c35d1e28 3 class pico_string {
va009039 5:fb15c35d1e28 4 public:
va009039 5:fb15c35d1e28 5 pico_string(){
va009039 5:fb15c35d1e28 6 _len = 0;
va009039 5:fb15c35d1e28 7 _buf = (char*)malloc(1);
va009039 5:fb15c35d1e28 8 if (_buf) {
va009039 5:fb15c35d1e28 9 _buf[0] = '\0';
va009039 5:fb15c35d1e28 10 }
va009039 5:fb15c35d1e28 11 }
va009039 5:fb15c35d1e28 12 ~pico_string() {
va009039 5:fb15c35d1e28 13 if (_buf) {
va009039 5:fb15c35d1e28 14 free(_buf);
va009039 5:fb15c35d1e28 15 }
va009039 5:fb15c35d1e28 16 }
va009039 5:fb15c35d1e28 17 bool empty() {
va009039 5:fb15c35d1e28 18 return _len == 0;
va009039 5:fb15c35d1e28 19 }
va009039 5:fb15c35d1e28 20 void append(const char* s, int len) {
va009039 5:fb15c35d1e28 21 if (_buf == NULL) {
va009039 5:fb15c35d1e28 22 return;
va009039 5:fb15c35d1e28 23 }
va009039 5:fb15c35d1e28 24 char* p = (char*)malloc(_len+len+1);
va009039 5:fb15c35d1e28 25 if (p == NULL) {
va009039 5:fb15c35d1e28 26 return;
va009039 5:fb15c35d1e28 27 }
va009039 5:fb15c35d1e28 28 memcpy(p, _buf, _len);
va009039 5:fb15c35d1e28 29 memcpy(p+_len, s, len);
va009039 5:fb15c35d1e28 30 p[_len+len] = '\0';
va009039 5:fb15c35d1e28 31 free(_buf);
va009039 5:fb15c35d1e28 32 _buf = p;
va009039 5:fb15c35d1e28 33 }
va009039 5:fb15c35d1e28 34 void append(const char* s) {
va009039 5:fb15c35d1e28 35 append(s, strlen(s));
va009039 5:fb15c35d1e28 36 }
va009039 5:fb15c35d1e28 37 char* c_str() {
va009039 5:fb15c35d1e28 38 if (_buf) {
va009039 5:fb15c35d1e28 39 return _buf;
va009039 5:fb15c35d1e28 40 }
va009039 5:fb15c35d1e28 41 return "";
va009039 5:fb15c35d1e28 42 }
va009039 5:fb15c35d1e28 43 private:
va009039 5:fb15c35d1e28 44 char* _buf;
va009039 5:fb15c35d1e28 45 int _len;
va009039 5:fb15c35d1e28 46 };