[转]Convert Windows TCHAR argv list to classical char * argv

http://www.wincli.com/?p=72

 

 

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 string int 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->string char * 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 released char ** 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 content void 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; }