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?
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#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;
} |