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cmd: Avoid reading char by char from files.

This commit is contained in:
Frédéric Delanoy 2011-10-06 18:50:32 +02:00 committed by Alexandre Julliard
parent 5e3cb1867b
commit cd30c52b35
1 changed files with 29 additions and 25 deletions
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54
programs/cmd/batch.c
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@ -188,38 +188,42 @@ WCHAR *WCMD_parameter (WCHAR *s, int n, WCHAR **where, WCHAR **end) {
WCHAR *WCMD_fgets(WCHAR *buf, int noChars, HANDLE h)
{
DWORD bytes, charsRead;
DWORD charsRead;
BOOL status;
WCHAR *p;
LARGE_INTEGER filepos;
int i;
/* We can't use the native f* functions because of the filename syntax differences
between DOS and Unix. Also need to lose the LF (or CRLF) from the line. */
p = buf;
if (WCMD_is_console_handle(h)) {
status = ReadConsoleW(h, buf, noChars, &charsRead, NULL);
if (!status) return NULL;
if (buf[charsRead-2] == '\r')
buf[charsRead-2] = '\0'; /* Strip \r\n */
else {
/* Truncate */
buf[noChars-1] = '\0';
}
return p;
if (!WCMD_is_console_handle(h)) {
/* Save current file position */
filepos.QuadPart = 0;
SetFilePointerEx(h, filepos, &filepos, FILE_CURRENT);
}
/* TODO: More intelligent buffering for reading lines from files */
do {
status = WCMD_ReadFile(h, buf, 1, &bytes);
if ((status == 0) || ((bytes == 0) && (buf == p))) return NULL;
if (*buf == '\n') bytes = 0;
else if (*buf != '\r') {
buf++;
noChars--;
}
*buf = '\0';
} while ((bytes == 1) && (noChars > 1));
return p;
status = WCMD_ReadFile(h, buf, noChars, &charsRead);
if (!status || charsRead == 0) return NULL;
/* Find first EOL */
for (i = 0; i < charsRead; i++) {
if (buf[i] == '\n' || buf[i] == '\r')
break;
}
if (!WCMD_is_console_handle(h) && i != charsRead) {
/* Sets file pointer to the start of the next line, if any */
filepos.QuadPart += i + 1 + (buf[i] == '\r' ? 1 : 0);
SetFilePointerEx(h, filepos, NULL, FILE_BEGIN);
}
/* Truncate at EOL (or end of buffer) */
if (i == noChars)
i--;
buf[i] = '\0';
return buf;
}
/* WCMD_splitpath - copied from winefile as no obvious way to use it otherwise */