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ciderpress/util/PathName.cpp

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/*
* CiderPress
* Copyright (C) 2007 by faddenSoft, LLC. All Rights Reserved.
* See the file LICENSE for distribution terms.
*/
/*
* Pathname utilities.
*/
#include "stdafx.h"
#include "PathName.h"
#include "Util.h"
#include <stdio.h>
#include <fcntl.h>
#include <io.h>
#include <direct.h>
#include <sys/stat.h>
#include <sys/utime.h>
#include <errno.h>
#ifndef S_ISREG
# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
# define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#endif
# ifndef F_OK
# define F_OK 00
# endif
# ifndef R_OK
# define R_OK 04
# endif
/*
* ===========================================================================
* Filename utils
* ===========================================================================
*/
#define kFilenameExtDelim '.' /* separates extension from filename */
const WCHAR* PathName::FilenameOnly(const WCHAR* pathname, WCHAR fssep)
{
const WCHAR* retstr;
const WCHAR* pSlash;
WCHAR* tmpStr = NULL;
ASSERT(pathname != NULL);
if (fssep == '\0') {
retstr = pathname;
goto bail;
}
pSlash = wcsrchr(pathname, fssep); // strrchr
if (pSlash == NULL) {
retstr = pathname; /* whole thing is the filename */
goto bail;
}
pSlash++;
if (*pSlash == '\0') {
if (wcslen(pathname) < 2) {
retstr = pathname; /* the pathname is just "/"? Whatever */
goto bail;
}
/* some bonehead put an fssep on the very end; back up before it */
/* (not efficient, but this should be rare, and I'm feeling lazy) */
tmpStr = wcsdup(pathname);
tmpStr[wcslen(pathname)-1] = '\0';
pSlash = wcsrchr(tmpStr, fssep);
if (pSlash == NULL) {
retstr = pathname; /* just a filename with a '/' after it */
goto bail;
}
pSlash++;
if (*pSlash == '\0') {
retstr = pathname; /* I give up! */
goto bail;
}
retstr = pathname + (pSlash - tmpStr);
} else {
retstr = pSlash;
}
bail:
free(tmpStr);
return retstr;
}
const WCHAR* PathName::FindExtension(const WCHAR* pathname, WCHAR fssep)
{
const WCHAR* pFilename;
const WCHAR* pExt;
/*
* We have to isolate the filename so that we don't get excited
* about "/foo.bar/file".
*/
pFilename = FilenameOnly(pathname, fssep);
ASSERT(pFilename != NULL);
pExt = wcsrchr(pFilename, kFilenameExtDelim);
/* also check for "/blah/foo.", which doesn't count */
if (pExt != NULL && *(pExt+1) != '\0')
return pExt;
return NULL;
}
CString PathName::GetFileName(void)
{
CString str;
SplitIFN();
str = fFileName;
str += fExt;
{
const WCHAR* ccp;
ccp = FilenameOnly(fPathName, '\\');
if (wcscmp(ccp, str) != 0) {
LOGI("NOTE: got different filenames '%ls' vs '%ls'",
ccp, (LPCTSTR) str);
}
}
return str;
}
CString PathName::GetDriveOnly(void)
{
SplitIFN();
return fDrive;
}
CString PathName::GetDriveAndPath(void)
{
CString str;
SplitIFN();
str = fDrive;
str += fDir;
return str;
}
CString PathName::GetPathOnly(void)
{
SplitIFN();
return fDir;
}
CString PathName::GetExtension(void)
{
SplitIFN();
{
const WCHAR* ccp;
ccp = FindExtension(fPathName, '\\');
if ((ccp == NULL && wcslen(fExt) > 0) ||
(ccp != NULL && wcscmp(ccp, fExt) != 0))
{
LOGI("NOTE: got different extensions '%ls' vs '%ls'",
ccp, (LPCTSTR) fExt);
}
}
return fExt;
}
int PathName::SFNToLFN(void)
{
WCHAR buf[MAX_PATH];
WIN32_FIND_DATA findFileData;
HANDLE hFind;
WCHAR* cp;
DWORD len;
CString lfn;
bool hadEndingSlash = false;
lfn = "";
if (fPathName.IsEmpty())
return 0;
/* fully expand it */
len = GetFullPathName(fPathName, NELEM(buf), buf, &cp);
if (len == 0 || len >= sizeof(buf))
return -1;
//LOGI(" FullPathName='%ls'", buf);
if (buf[len-1] == '\\') {
hadEndingSlash = true;
buf[len-1] = '\0';
len--;
}
/*
* Walk forward in the buffer, passing increasingly-long filenames into
* FindFirstFile.
*/
cp = buf;
while (cp != buf + len) {
if (*cp == '\\') {
if (cp == buf) {
/* just the leading '\'; shouldn't happen after GetFPN? */
lfn += "\\";
} else if (cp == buf+2 && *buf != '\\') {
/* this is probably "C:\", which FindFF doesn't handle */
*cp = '\0';
lfn += buf;
lfn += "\\";
*cp = '\\';
} else {
*cp = '\0';
hFind = ::FindFirstFile(buf, &findFileData);
if (hFind == INVALID_HANDLE_VALUE) {
DWORD err = ::GetLastError();
LOGI("FindFirstFile '%ls' failed, err=%d", buf, err);
return -1;
} else {
FindClose(hFind);
}
//LOGI(" COMPONENT '%ls' [%ls]", findFileData.cFileName,
// findFileData.cAlternateFileName);
lfn += findFileData.cFileName;
lfn += "\\";
*cp = '\\';
}
}
cp++;
}
//LOGI(" Interim name = '%ls'", (LPCTSTR) lfn);
if (*(cp-1) != '\\') {
/* there was some stuff after the last '\\'; handle it */
hFind = ::FindFirstFile(buf, &findFileData);
if (hFind == INVALID_HANDLE_VALUE) {
DWORD err = ::GetLastError();
LOGI("FindFirstFile '%ls' failed, err=%d", buf, err);
return -1;
} else {
FindClose(hFind);
}
//LOGI(" COMPONENT2 '%ls' [%ls]", findFileData.cFileName,
// findFileData.cAlternateFileName);
lfn += findFileData.cFileName;
}
//LOGI(" Almost done = '%ls'", (LPCTSTR) lfn);
if (hadEndingSlash)
lfn += "\\";
fPathName = lfn;
return 0;
}
CString PathName::GetDescription()
{
CString szTypeName;
SHFILEINFO sfi = { 0 };
SHGetFileInfo(fPathName, 0, &sfi, sizeof(SHFILEINFO), SHGFI_TYPENAME);
szTypeName = sfi.szTypeName;
return szTypeName;
}
bool PathName::Exists(void)
{
/*
* If we use something simple like access(), we will catch all files including
* the ones in Network Neighborhood. Using the FindFirstFile stuff avoids
* the problem, but raises the difficulty of being unable to find simple
* things like "D:\".
*/
return (::_waccess(fPathName, 0) != -1);
#if 0
WIN32_FIND_DATA fd;
bool result;
CString szFindPath = fPathName;
int nSlash = szFindPath.ReverseFind('\\');
if( nSlash == szFindPath.GetLength()-1)
{
szFindPath = szFindPath.Left(nSlash);
}
HANDLE hFind = FindFirstFile( szFindPath, &fd );
if ( hFind != INVALID_HANDLE_VALUE )
{
FindClose( hFind );
}
result = (hFind != INVALID_HANDLE_VALUE);
#endif
#if 0
if (::access(fPathName, 0) != -1) {
/* exists */
if (!result) {
ASSERT(false);
}
} else {
/* doesn't exist */
if (result) {
ASSERT(false);
}
}
return result;
#endif
}
/*
Problem:
FindFirstFile returns INVALID_HANDLE_VALUE while seeking "C:"
my workaround:
instead of removing the backshash at the end of the path, i add a * to find any file in this folder.
FileName.cpp line 135:
replace
----------------------
if( nSlash == szFindPath.GetLength()-1)
{
szFindPath = szFindPath.Left(nSlash);
}
----------------------
with
----------------------
if( nSlash == szFindPath.GetLength()-1)
{
szFindPath += "*";
}
else
szFindPath += "\\*";
----------------------
*/
int PathName::Mkdir(const WCHAR* dir)
{
int err = 0;
ASSERT(dir != NULL);
if (_wmkdir(dir) < 0)
err = errno ? errno : -1;
return err;
}
int PathName::GetFileInfo(const WCHAR* pathname, struct _stat* psb,
time_t* pModWhen, bool* pExists, bool* pIsReadable, bool* pIsDirectory)
{
struct _stat sbuf;
int cc;
/*
* On base network path, e.g. \\webby\fadden, the stat() call fails
* with ENOENT, but the access() call succeeds. Not sure if this
* can happen in other circumstances, so I'm not messing with it
* for now.
*/
//{
// int cc2 = access(pathname, 0);
//}
if (pModWhen != NULL)
*pModWhen = (time_t) -1;
if (pExists != NULL)
*pExists = false;
if (pIsReadable != NULL)
*pIsReadable = false;
if (pIsDirectory != NULL)
*pIsDirectory = false;
cc = _wstat(pathname, &sbuf);
if (psb != NULL)
*psb = sbuf;
if (cc != 0) {
if (errno == ENOENT) {
if (pExists != NULL)
*pExists = false;
return 0;
} else
return errno;
}
if (pExists != NULL)
*pExists = true;
if (pIsDirectory != NULL && S_ISDIR(sbuf.st_mode))
*pIsDirectory = true;
if (pModWhen != NULL)
*pModWhen = sbuf.st_mtime;
if (pIsReadable != NULL) {
/*
* Test if we can read this file. How do we do that? The easy but
* slow way is to call access(2), the harder way is to figure out
* what user/group we are and compare the appropriate file mode.
*/
if (_waccess(pathname, R_OK) < 0)
*pIsReadable = false;
else
*pIsReadable = true;
}
return 0;
}
int PathName::CheckFileStatus(struct _stat* psb, bool* pExists, bool* pIsReadable,
bool* pIsDir)
{
return GetFileInfo(fPathName, psb, NULL, pExists, pIsReadable, pIsDir);
}
time_t PathName::GetModWhen(void)
{
time_t when;
if (GetFileInfo(fPathName, NULL, &when, NULL, NULL, NULL) != 0)
return (time_t) -1;
return when;
}
int PathName::SetModWhen(time_t when)
{
struct _utimbuf utbuf;
if (when == (time_t) -1 || when == kDateNone || when == kDateInvalid) {
LOGI("NOTE: not setting invalid date (%I64d)", (long long) when);
return 0;
}
utbuf.actime = utbuf.modtime = when;
if (_wutime(fPathName, &utbuf) < 0)
return errno;
return 0;
}
int PathName::CreateSubdirIFN(const WCHAR* pathStart, const WCHAR* pathEnd,
WCHAR fssep)
{
int err = 0;
WCHAR* tmpBuf = NULL;
bool isDirectory;
bool exists;
ASSERT(pathStart != NULL);
ASSERT(pathEnd != NULL);
ASSERT(fssep != '\0');
/* pathStart might have whole path, but we only want up to "pathEnd" */
tmpBuf = wcsdup(pathStart);
tmpBuf[pathEnd - pathStart +1] = '\0';
err = GetFileInfo(tmpBuf, NULL, NULL, &exists, NULL, &isDirectory);
if (err != 0) {
LOGI(" Could not get file info for '%ls'", tmpBuf);
goto bail;
} else if (!exists) {
/* dir doesn't exist; move up a level and check parent */
pathEnd = wcsrchr(tmpBuf, fssep);
if (pathEnd != NULL) {
pathEnd--;
ASSERT(pathEnd >= tmpBuf);
err = CreateSubdirIFN(tmpBuf, pathEnd, fssep);
if (err != 0)
goto bail;
}
/* parent is taken care of; create this one */
err = Mkdir(tmpBuf);
if (err != 0)
goto bail;
} else {
/* file does exist, make sure it's a directory */
if (!isDirectory) {
LOGI("Existing file '%ls' is not a directory", tmpBuf);
err = ENOTDIR;
goto bail;
}
}
bail:
free(tmpBuf);
return err;
}
int PathName::CreatePathIFN(void)
{
int err = 0;
CString pathName(fPathName);
WCHAR* pathStart;
const WCHAR* pathEnd;
ASSERT(fFssep != '\0');
pathStart = pathName.GetBuffer(1);
/* BAD: network paths begin with "\\", not a drive letter */
// if (pathStart[0] == fFssep)
// pathStart++;
/* remove trailing fssep */
if (pathStart[wcslen(pathStart)-1] == fFssep)
pathStart[wcslen(pathStart)-1] = '\0';
/* work around bug in Win32 strrchr */
if (pathStart[0] == '\0' || pathStart[1] == '\0') {
err = EINVAL;
goto bail;
}
pathEnd = wcsrchr(pathStart, fFssep);
if (pathEnd == NULL) {
/* no subdirectory components found */
goto bail;
}
pathEnd--; // back up past the fssep
ASSERT(pathEnd >= pathStart);
if (pathEnd - pathStart < 0) {
err = EINVAL;
goto bail;
}
/*
* Special-case the root directory, e.g. "C:\", which needs the final
* slash to be recognized by Windows file calls.
*/
if (pathEnd - pathStart == 1 && pathStart[1] == ':' &&
(toupper(pathStart[0]) >= 'A' && toupper(pathStart[0]) <= 'Z'))
{
pathEnd++; // put it back on
}
/*
* Test to determine which directories exist. The most likely case
* is that some or all of the components have already been created,
* so we start with the last one and work backward.
*/
err = CreateSubdirIFN(pathStart, pathEnd, fFssep);
/* fall through with err */
bail:
pathName.ReleaseBuffer();
return err;
}
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