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Speed up batch file execution by reading a line at a time instead of a byte at a time.

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svn path=/trunk/; revision=39848
This commit is contained in:
Jeffrey Morlan 2009-03-02 20:00:26 +00:00
parent 642a549191
commit eff51218fb
1 changed files with 9 additions and 8 deletions
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17
reactos/base/shell/cmd/misc.c
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@ -503,7 +503,6 @@ BOOL IsExistingDirectory (LPCTSTR pszPath)
BOOL FileGetString (HANDLE hFile, LPTSTR lpBuffer, INT nBufferLength) BOOL FileGetString (HANDLE hFile, LPTSTR lpBuffer, INT nBufferLength)
{ {
LPSTR lpString; LPSTR lpString;
CHAR ch;
DWORD dwRead; DWORD dwRead;
INT len = 0; INT len = 0;
#ifdef _UNICODE #ifdef _UNICODE
@ -511,18 +510,20 @@ BOOL FileGetString (HANDLE hFile, LPTSTR lpBuffer, INT nBufferLength)
#else #else
lpString = lpBuffer; lpString = lpBuffer;
#endif #endif
while ((--nBufferLength > 0) &&
ReadFile(hFile, &ch, 1, &dwRead, NULL) && dwRead) if (ReadFile(hFile, lpString, nBufferLength - 1, &dwRead, NULL))
{
lpString[len++] = ch;
if (ch == '\n')
{ {
/* break at new line*/ /* break at new line*/
break; CHAR *end = memchr(lpString, '\n', dwRead);
len = dwRead;
if (end)
{
len = (end - lpString) + 1;
SetFilePointer(hFile, len - dwRead, NULL, FILE_CURRENT);
} }
} }
if (!dwRead && !len) if (!len)
{ {
#ifdef _UNICODE #ifdef _UNICODE
cmd_free(lpString); cmd_free(lpString);