/**
* Copies @a cLines from the @a pSrc stream onto the @a pDst stream.
*
* The stream positions will be used and changed in both streams.
*
* @returns IPRT status code.
* @param pDst The destination stream. Must be in write mode.
* @param cLines The number of lines. (0 is accepted.)
* @param pSrc The source stream. Must be in read mode.
*/
int ScmStreamCopyLines(PSCMSTREAM pDst, PSCMSTREAM pSrc, size_t cLines)
{
AssertReturn(pDst->fWriteOrRead, VERR_ACCESS_DENIED);
if (RT_FAILURE(pDst->rc))
return pDst->rc;
AssertReturn(!pSrc->fWriteOrRead, VERR_ACCESS_DENIED);
if (RT_FAILURE(pSrc->rc))
return pSrc->rc;
while (cLines-- > 0)
{
SCMEOL enmEol;
size_t cchLine;
const char *pchLine = ScmStreamGetLine(pSrc, &cchLine, &enmEol);
if (!pchLine)
return pDst->rc = (RT_FAILURE(pSrc->rc) ? pSrc->rc : VERR_EOF);
int rc = ScmStreamPutLine(pDst, pchLine, cchLine, enmEol);
if (RT_FAILURE(rc))
return rc;
}
return VINF_SUCCESS;
}
/**
* Strip trailing blanks (space & tab).
*
* @returns True if modified, false if not.
* @param pIn The input stream.
* @param pOut The output stream.
* @param pSettings The settings.
*/
bool rewrite_StripTrailingBlanks(PSCMRWSTATE pState, PSCMSTREAM pIn, PSCMSTREAM pOut, PCSCMSETTINGSBASE pSettings)
{
if (!pSettings->fStripTrailingBlanks)
return false;
bool fModified = false;
SCMEOL enmEol;
size_t cchLine;
const char *pchLine;
while ((pchLine = ScmStreamGetLine(pIn, &cchLine, &enmEol)) != NULL)
{
int rc;
if ( cchLine == 0
|| !RT_C_IS_BLANK(pchLine[cchLine - 1]) )
rc = ScmStreamPutLine(pOut, pchLine, cchLine, enmEol);
else
{
cchLine--;
while (cchLine > 0 && RT_C_IS_BLANK(pchLine[cchLine - 1]))
cchLine--;
rc = ScmStreamPutLine(pOut, pchLine, cchLine, enmEol);
fModified = true;
}
if (RT_FAILURE(rc))
return false;
}
if (fModified)
ScmVerbose(pState, 2, " * Stripped trailing blanks\n");
return fModified;
}
/**
* Expand tabs.
*
* @returns True if modified, false if not.
* @param pIn The input stream.
* @param pOut The output stream.
* @param pSettings The settings.
*/
bool rewrite_ExpandTabs(PSCMRWSTATE pState, PSCMSTREAM pIn, PSCMSTREAM pOut, PCSCMSETTINGSBASE pSettings)
{
if (!pSettings->fConvertTabs)
return false;
size_t const cchTab = pSettings->cchTab;
bool fModified = false;
SCMEOL enmEol;
size_t cchLine;
const char *pchLine;
while ((pchLine = ScmStreamGetLine(pIn, &cchLine, &enmEol)) != NULL)
{
int rc;
const char *pchTab = (const char *)memchr(pchLine, '\t', cchLine);
if (!pchTab)
rc = ScmStreamPutLine(pOut, pchLine, cchLine, enmEol);
else
{
size_t offTab = 0;
const char *pchChunk = pchLine;
for (;;)
{
size_t cchChunk = pchTab - pchChunk;
offTab += cchChunk;
ScmStreamWrite(pOut, pchChunk, cchChunk);
size_t cchToTab = cchTab - offTab % cchTab;
ScmStreamWrite(pOut, g_szTabSpaces, cchToTab);
offTab += cchToTab;
pchChunk = pchTab + 1;
size_t cchLeft = cchLine - (pchChunk - pchLine);
pchTab = (const char *)memchr(pchChunk, '\t', cchLeft);
if (!pchTab)
{
rc = ScmStreamPutLine(pOut, pchChunk, cchLeft, enmEol);
break;
}
}
fModified = true;
}
if (RT_FAILURE(rc))
return false;
}
if (fModified)
ScmVerbose(pState, 2, " * Expanded tabs\n");
return fModified;
}
/**
* Worker for rewrite_ForceNativeEol, rewrite_ForceLF and rewrite_ForceCRLF.
*
* @returns true if modifications were made, false if not.
* @param pIn The input stream.
* @param pOut The output stream.
* @param pSettings The settings.
* @param enmDesiredEol The desired end of line indicator type.
* @param pszDesiredSvnEol The desired svn:eol-style.
*/
static bool rewrite_ForceEol(PSCMRWSTATE pState, PSCMSTREAM pIn, PSCMSTREAM pOut, PCSCMSETTINGSBASE pSettings,
SCMEOL enmDesiredEol, const char *pszDesiredSvnEol)
{
if (!pSettings->fConvertEol)
return false;
bool fModified = false;
SCMEOL enmEol;
size_t cchLine;
const char *pchLine;
while ((pchLine = ScmStreamGetLine(pIn, &cchLine, &enmEol)) != NULL)
{
if ( enmEol != enmDesiredEol
&& enmEol != SCMEOL_NONE)
{
fModified = true;
enmEol = enmDesiredEol;
}
int rc = ScmStreamPutLine(pOut, pchLine, cchLine, enmEol);
if (RT_FAILURE(rc))
return false;
}
if (fModified)
ScmVerbose(pState, 2, " * Converted EOL markers\n");
/* Check svn:eol-style if appropriate */
if ( pSettings->fSetSvnEol
&& ScmSvnIsInWorkingCopy(pState))
{
char *pszEol;
int rc = ScmSvnQueryProperty(pState, "svn:eol-style", &pszEol);
if ( (RT_SUCCESS(rc) && strcmp(pszEol, pszDesiredSvnEol))
|| rc == VERR_NOT_FOUND)
{
if (rc == VERR_NOT_FOUND)
ScmVerbose(pState, 2, " * Setting svn:eol-style to %s (missing)\n", pszDesiredSvnEol);
else
ScmVerbose(pState, 2, " * Setting svn:eol-style to %s (was: %s)\n", pszDesiredSvnEol, pszEol);
int rc2 = ScmSvnSetProperty(pState, "svn:eol-style", pszDesiredSvnEol);
if (RT_FAILURE(rc2))
RTMsgError("ScmSvnSetProperty: %Rrc\n", rc2); /** @todo propagate the error somehow... */
}
if (RT_SUCCESS(rc))
RTStrFree(pszEol);
}
/** @todo also check the subversion svn:eol-style state! */
return fModified;
}
/**
* Queries the value of an SVN property.
*
* This will automatically adjust for scheduled changes.
*
* @returns IPRT status code.
* @retval VERR_INVALID_STATE if not a SVN WC file.
* @retval VERR_NOT_FOUND if the property wasn't found.
* @param pState The rewrite state to work on.
* @param pszName The property name.
* @param ppszValue Where to return the property value. Free this
* using RTStrFree. Optional.
*/
int ScmSvnQueryProperty(PSCMRWSTATE pState, const char *pszName, char **ppszValue)
{
/*
* Look it up in the scheduled changes.
*/
size_t i = pState->cSvnPropChanges;
while (i-- > 0)
if (!strcmp(pState->paSvnPropChanges[i].pszName, pszName))
{
const char *pszValue = pState->paSvnPropChanges[i].pszValue;
if (!pszValue)
return VERR_NOT_FOUND;
if (ppszValue)
return RTStrDupEx(ppszValue, pszValue);
return VINF_SUCCESS;
}
#ifdef SCM_WITHOUT_LIBSVN
int rc;
scmSvnFindSvnBinary(pState);
if (g_enmSvnVersion < kScmSvnVersion_1_7)
{
/*
* Hack: Read the .svn/props/<file>.svn-work file exists.
*/
char szPath[RTPATH_MAX];
rc = scmSvnConstructName(pState, ".svn/props/", ".svn-work", szPath);
if (RT_SUCCESS(rc) && !RTFileExists(szPath))
rc = scmSvnConstructName(pState, ".svn/prop-base/", ".svn-base", szPath);
if (RT_SUCCESS(rc))
{
SCMSTREAM Stream;
rc = ScmStreamInitForReading(&Stream, szPath);
if (RT_SUCCESS(rc))
{
/*
* The current format is K len\n<name>\nV len\n<value>\n" ... END.
*/
rc = VERR_NOT_FOUND;
size_t const cchName = strlen(pszName);
SCMEOL enmEol;
size_t cchLine;
const char *pchLine;
while ((pchLine = ScmStreamGetLine(&Stream, &cchLine, &enmEol)) != NULL)
{
/*
* Parse the 'K num' / 'END' line.
*/
if ( cchLine == 3
&& !memcmp(pchLine, "END", 3))
break;
size_t cchKey;
if ( cchLine < 3
|| pchLine[0] != 'K'
|| pchLine[1] != ' '
|| !scmSvnReadNumber(&pchLine[2], cchLine - 2, &cchKey)
|| cchKey == 0
|| cchKey > 4096)
{
RTMsgError("%s:%u: Unexpected data '%.*s'\n", szPath, ScmStreamTellLine(&Stream), cchLine, pchLine);
rc = VERR_PARSE_ERROR;
break;
}
/*
* Match the key and skip to the value line. Don't bother with
* names containing EOL markers.
*/
size_t const offKey = ScmStreamTell(&Stream);
bool fMatch = cchName == cchKey;
if (fMatch)
{
pchLine = ScmStreamGetLine(&Stream, &cchLine, &enmEol);
if (!pchLine)
break;
fMatch = cchLine == cchName
&& !memcmp(pchLine, pszName, cchName);
}
if (RT_FAILURE(ScmStreamSeekAbsolute(&Stream, offKey + cchKey)))
break;
if (RT_FAILURE(ScmStreamSeekByLine(&Stream, ScmStreamTellLine(&Stream) + 1)))
break;
/*
* Read and Parse the 'V num' line.
*/
pchLine = ScmStreamGetLine(&Stream, &cchLine, &enmEol);
if (!pchLine)
break;
size_t cchValue;
if ( cchLine < 3
|| pchLine[0] != 'V'
|| pchLine[1] != ' '
|| !scmSvnReadNumber(&pchLine[2], cchLine - 2, &cchValue)
|| cchValue > _1M)
{
RTMsgError("%s:%u: Unexpected data '%.*s'\n", szPath, ScmStreamTellLine(&Stream), cchLine, pchLine);
rc = VERR_PARSE_ERROR;
break;
}
/*
* If we have a match, allocate a return buffer and read the
* value into it. Otherwise skip this value and continue
* searching.
*/
if (fMatch)
{
if (!ppszValue)
rc = VINF_SUCCESS;
else
{
char *pszValue;
rc = RTStrAllocEx(&pszValue, cchValue + 1);
if (RT_SUCCESS(rc))
{
rc = ScmStreamRead(&Stream, pszValue, cchValue);
if (RT_SUCCESS(rc))
*ppszValue = pszValue;
else
RTStrFree(pszValue);
}
}
break;
}
if (RT_FAILURE(ScmStreamSeekRelative(&Stream, cchValue)))
break;
if (RT_FAILURE(ScmStreamSeekByLine(&Stream, ScmStreamTellLine(&Stream) + 1)))
break;
}
if (RT_FAILURE(ScmStreamGetStatus(&Stream)))
{
rc = ScmStreamGetStatus(&Stream);
RTMsgError("%s: stream error %Rrc\n", szPath, rc);
}
ScmStreamDelete(&Stream);
}
}
if (rc == VERR_FILE_NOT_FOUND)
rc = VERR_NOT_FOUND;
}
else
{
const char *apszArgs[] = { g_szSvnPath, "propget", "--strict", pszName, pState->pszFilename, NULL };
char *pszValue;
rc = scmSvnRunAndGetOutput(pState, apszArgs, false, &pszValue);
if (RT_SUCCESS(rc))
{
if (pszValue && *pszValue)
{
if (ppszValue)
{
*ppszValue = pszValue;
pszValue = NULL;
}
}
else
rc = VERR_NOT_FOUND;
RTStrFree(pszValue);
}
}
return rc;
#else
NOREF(pState);
#endif
return VERR_NOT_FOUND;
}
/**
* Creates a diff of the changes between the streams @a pLeft and @a pRight.
*
* This currently only implements the simplest diff format, so no contexts.
*
* Also, note that we won't detect differences in the final newline of the
* streams.
*
* @returns The number of differences.
* @param pszFilename The filename.
* @param pLeft The left side stream.
* @param pRight The right side stream.
* @param fIgnoreEol Whether to ignore end of line markers.
* @param fIgnoreLeadingWhite Set if leading white space should be ignored.
* @param fIgnoreTrailingWhite Set if trailing white space should be ignored.
* @param fSpecialChars Whether to print special chars in a human
* readable form or not.
* @param cchTab The tab size.
* @param pDiff Where to write the diff.
*/
size_t ScmDiffStreams(const char *pszFilename, PSCMSTREAM pLeft, PSCMSTREAM pRight, bool fIgnoreEol,
bool fIgnoreLeadingWhite, bool fIgnoreTrailingWhite, bool fSpecialChars,
size_t cchTab, PRTSTREAM pDiff)
{
#ifdef RT_STRICT
ScmStreamCheckItegrity(pLeft);
ScmStreamCheckItegrity(pRight);
#endif
/*
* Set up the diff state.
*/
SCMDIFFSTATE State;
State.cDiffs = 0;
State.pszFilename = pszFilename;
State.pLeft = pLeft;
State.pRight = pRight;
State.fIgnoreEol = fIgnoreEol;
State.fIgnoreLeadingWhite = fIgnoreLeadingWhite;
State.fIgnoreTrailingWhite = fIgnoreTrailingWhite;
State.fSpecialChars = fSpecialChars;
State.cchTab = cchTab;
State.pDiff = pDiff;
/*
* Compare them line by line.
*/
ScmStreamRewindForReading(pLeft);
ScmStreamRewindForReading(pRight);
const char *pchLeft;
const char *pchRight;
for (;;)
{
SCMEOL enmEolLeft;
size_t cchLeft;
pchLeft = ScmStreamGetLine(pLeft, &cchLeft, &enmEolLeft);
SCMEOL enmEolRight;
size_t cchRight;
pchRight = ScmStreamGetLine(pRight, &cchRight, &enmEolRight);
if (!pchLeft || !pchRight)
break;
if (!scmDiffCompare(&State, pchLeft, cchLeft, enmEolLeft, pchRight, cchRight, enmEolRight))
scmDiffSynchronize(&State, 3);
}
/*
* Deal with any remaining differences.
*/
if (pchLeft)
scmDiffReport(&State, 0, ScmStreamTellLine(pLeft) - 1, ~(size_t)0, ScmStreamTellLine(pRight), 0);
else if (pchRight)
scmDiffReport(&State, 0, ScmStreamTellLine(pLeft), 0, ScmStreamTellLine(pRight) - 1, ~(size_t)0);
/*
* Report any errors.
*/
if (RT_FAILURE(ScmStreamGetStatus(pLeft)))
RTMsgError("Left diff stream error: %Rrc\n", ScmStreamGetStatus(pLeft));
if (RT_FAILURE(ScmStreamGetStatus(pRight)))
RTMsgError("Right diff stream error: %Rrc\n", ScmStreamGetStatus(pRight));
return State.cDiffs;
}
