/**
* Prints a range of lines with a prefix.
*
* @param pState The diff state.
* @param chPrefix The prefix.
* @param pStream The stream to get the lines from.
* @param iLine The first line.
* @param cLines The number of lines.
*/
static void scmDiffPrintLines(PSCMDIFFSTATE pState, char chPrefix, PSCMSTREAM pStream, size_t iLine, size_t cLines)
{
while (cLines-- > 0)
{
SCMEOL enmEol;
size_t cchLine;
const char *pchLine = ScmStreamGetLineByNo(pStream, iLine, &cchLine, &enmEol);
RTStrmPutCh(pState->pDiff, chPrefix);
if (pchLine && cchLine)
{
if (!pState->fSpecialChars)
RTStrmWrite(pState->pDiff, pchLine, cchLine);
else
{
size_t offVir = 0;
const char *pchStart = pchLine;
const char *pchTab = (const char *)memchr(pchLine, '\t', cchLine);
while (pchTab)
{
RTStrmWrite(pState->pDiff, pchStart, pchTab - pchStart);
offVir += pchTab - pchStart;
size_t cchTab = pState->cchTab - offVir % pState->cchTab;
switch (cchTab)
{
case 1: RTStrmPutStr(pState->pDiff, "."); break;
case 2: RTStrmPutStr(pState->pDiff, ".."); break;
case 3: RTStrmPutStr(pState->pDiff, "[T]"); break;
case 4: RTStrmPutStr(pState->pDiff, "[TA]"); break;
case 5: RTStrmPutStr(pState->pDiff, "[TAB]"); break;
default: RTStrmPrintf(pState->pDiff, "[TAB%.*s]", cchTab - 5, g_szTabSpaces); break;
}
offVir += cchTab;
/* next */
pchStart = pchTab + 1;
pchTab = (const char *)memchr(pchStart, '\t', cchLine - (pchStart - pchLine));
}
size_t cchLeft = cchLine - (pchStart - pchLine);
if (cchLeft)
RTStrmWrite(pState->pDiff, pchStart, cchLeft);
}
}
if (!pState->fSpecialChars)
RTStrmPutCh(pState->pDiff, '\n');
else if (enmEol == SCMEOL_LF)
RTStrmPutStr(pState->pDiff, "[LF]\n");
else if (enmEol == SCMEOL_CRLF)
RTStrmPutStr(pState->pDiff, "[CRLF]\n");
else
RTStrmPutStr(pState->pDiff, "[NONE]\n");
iLine++;
}
}
/** Write a string to standard output and print an error and return false on
* failure. */
bool outputString(const char *pcsz)
{
int rc = RTStrmPutStr(g_pStdOut, pcsz);
if (RT_FAILURE(rc))
{
RTStrmPrintf(g_pStdErr, "Error writing output: %Rrc\n", rc);
return false;
}
return true;
}
