77 lines
1.6 KiB
C++
77 lines
1.6 KiB
C++
#include "pch.h"
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//Read From Stdin
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//Return Value:
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// Number of WCHAR read if successful
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// -1 in case of Failure. Call GetLastError to get the error.
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LONG ReadFromIn(OUT LPWSTR *ppBuffer)
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{
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LPWSTR pBuffer = NULL;
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DWORD dwErr = ERROR_SUCCESS;
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pBuffer = (LPWSTR)LocalAlloc(LPTR,INIT_SIZE*sizeof(WCHAR));
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if(!pBuffer)
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{
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SetLastError(ERROR_NOT_ENOUGH_MEMORY);
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return -1;
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}
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LONG Pos = 0;
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LONG MaxSize = INIT_SIZE;
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wint_t ch;
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while((ch = getwchar()) != WEOF)
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{
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if(Pos == MaxSize -1 )
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{
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if(ERROR_SUCCESS != ResizeByTwo(&pBuffer,&MaxSize))
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{
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LocalFree(pBuffer);
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SetLastError(ERROR_NOT_ENOUGH_MEMORY);
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return -1;
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}
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}
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pBuffer[Pos++] = (WCHAR)ch;
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}
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pBuffer[Pos] = L'\0';
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*ppBuffer = pBuffer;
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return Pos;
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}
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//General Utility Functions
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DWORD ResizeByTwo( LPTSTR *ppBuffer,
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LONG *pSize )
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{
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LPWSTR pTempBuffer = (LPWSTR)LocalAlloc(LPTR,(*pSize)*2*sizeof(WCHAR));
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if(!pTempBuffer)
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return ERROR_NOT_ENOUGH_MEMORY;
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memcpy(pTempBuffer,*ppBuffer,*pSize*sizeof(WCHAR));
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LocalFree(*ppBuffer);
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*ppBuffer = pTempBuffer;
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*pSize *=2;
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return ERROR_SUCCESS;
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}
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BOOL StringCopy( LPWSTR *ppDest, LPWSTR pSrc)
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{
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*ppDest = NULL;
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if(!pSrc)
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return TRUE;
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*ppDest = (LPWSTR)LocalAlloc(LPTR, (wcslen(pSrc) + 1)*sizeof(WCHAR));
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if(!*ppDest)
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return FALSE;
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wcscpy(*ppDest,pSrc);
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return TRUE;
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}
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