Many people used to classical C have hard time adopting the code to Windows types. The code below illustrates one of the frequent questions: how to use TCHAR arguments with good old code expecting char * in arguments with minimum blood?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | #include "stdafx.h"#include "stdio.h"#include "stdlib.h"// returns number of TCHARs in stringint wstrlen(_TCHAR * wstr){ int l_idx = 0; while (((char*)wstr)[l_idx]!=0) l_idx+=2; return l_idx;} // Allocate char string and copy TCHAR->char->stringchar * wstrdup(_TCHAR * wSrc){ int l_idx=0; int l_len = wstrlen(wSrc); char * l_nstr = (char*)malloc(l_len); if (l_nstr) { do { l_nstr[l_idx] = (char)wSrc[l_idx]; l_idx++; } while ((char)wSrc[l_idx]!=0); } nstr[l_idx] = 0; return l_nstr;} // allocate argn structure parallel to argv// argn must be releasedchar ** allocate_argn (int argc, _TCHAR* argv[]){ char ** l_argn = (char **)malloc(argc * sizeof(char*)); for (int idx=0; idx<argc; idx++) { l_argn[idx] = wstrdup(argv[idx]); } return l_argn;}// release argn and its contentvoid release_argn(int argc, char ** nargv){ for (int idx=0; idx<argc; idx++) { free(nargv[idx]); } free(nargv);} //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// // Use exampe:////////////////////////////////////////////////////////////////////////int _tmain(int argc, _TCHAR* argv[]){ char ** argn = allocate_argn(argc, argv); // Optionally #define argv argn if (argc>1) { printf(“Arg 1 = ‘%s’\n”, argn[1]); // Just argn intead of argv } release_argn(argc, argn); return 0;} |