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Yajbir Singh f1b860b25c
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updated
2025-12-11 19:03:17 +05:30

778 lines
17 KiB
C++

//========================================================================
//
// gfile.cc
//
// Miscellaneous file and directory name manipulation.
//
// Copyright 1996-2003 Glyph & Cog, LLC
//
//========================================================================
#include <aconf.h>
#ifdef _WIN32
# undef WIN32_LEAN_AND_MEAN
# include <windows.h>
# include <time.h>
# include <direct.h>
# include <shobjidl.h>
# include <shlguid.h>
#else
# if !defined(ACORN)
# include <sys/types.h>
# include <sys/stat.h>
# include <fcntl.h>
# endif
# include <time.h>
# include <limits.h>
# include <string.h>
# if !defined(VMS) && !defined(ACORN)
# include <pwd.h>
# endif
# if defined(VMS) && (__DECCXX_VER < 50200000)
# include <unixlib.h>
# endif
#endif // _WIN32
#include "gmem.h"
#include "gmempp.h"
#include "GString.h"
#include "gfile.h"
// Some systems don't define this, so just make it something reasonably
// large.
#ifndef PATH_MAX
#define PATH_MAX 1024
#endif
#ifdef _IOS
#include <spawn.h>
extern char **environ;
int run_cmd(char* cmd)
{
pid_t pid;
char* argv[] = {"sh", "-c", cmd, NULL};
int status = posix_spawn(&pid, "/bin/sh", NULL, NULL, argv, environ);
if (0 == status)
{
if (-1 == waitpid(pid, &status, 0))
perror("waitpid");
}
return status;
}
#endif
//------------------------------------------------------------------------
GString *getHomeDir() {
#ifdef VMS
//---------- VMS ----------
return new GString("SYS$LOGIN:");
#elif defined(__EMX__) || defined(_WIN32)
//---------- OS/2+EMX and Win32 ----------
char *s;
GString *ret;
if ((s = getenv("HOME")))
ret = new GString(s);
else
ret = new GString(".");
return ret;
#elif defined(ACORN)
//---------- RISCOS ----------
return new GString("@");
#else
//---------- Unix ----------
char *s;
struct passwd *pw;
GString *ret;
if ((s = getenv("HOME"))) {
ret = new GString(s);
} else {
if ((s = getenv("USER")))
pw = getpwnam(s);
else
pw = getpwuid(getuid());
if (pw)
ret = new GString(pw->pw_dir);
else
ret = new GString(".");
}
return ret;
#endif
}
GString *getCurrentDir() {
char buf[PATH_MAX+1];
#if defined(__EMX__)
if (_getcwd2(buf, sizeof(buf)))
#elif defined(_WIN32)
if (GetCurrentDirectoryA(sizeof(buf), buf))
#elif defined(ACORN)
if (strcpy(buf, "@"))
#else
if (getcwd(buf, sizeof(buf)))
#endif
return new GString(buf);
return new GString();
}
GString *appendToPath(GString *path, const char *fileName) {
#if defined(VMS)
//---------- VMS ----------
//~ this should handle everything necessary for file
//~ requesters, but it's certainly not complete
char *p0, *p1, *p2;
char *q1;
p0 = path->getCString();
p1 = p0 + path->getLength() - 1;
if (!strcmp(fileName, "-")) {
if (*p1 == ']') {
for (p2 = p1; p2 > p0 && *p2 != '.' && *p2 != '['; --p2) ;
if (*p2 == '[')
++p2;
path->del(p2 - p0, p1 - p2);
} else if (*p1 == ':') {
path->append("[-]");
} else {
path->clear();
path->append("[-]");
}
} else if ((q1 = strrchr(fileName, '.')) && !strncmp(q1, ".DIR;", 5)) {
if (*p1 == ']') {
path->insert(p1 - p0, '.');
path->insert(p1 - p0 + 1, fileName, q1 - fileName);
} else if (*p1 == ':') {
path->append('[');
path->append(']');
path->append(fileName, q1 - fileName);
} else {
path->clear();
path->append(fileName, q1 - fileName);
}
} else {
if (*p1 != ']' && *p1 != ':')
path->clear();
path->append(fileName);
}
return path;
#elif defined(_WIN32)
//---------- Win32 ----------
GString *tmp;
char buf[256];
char *fp;
tmp = new GString(path);
tmp->append('/');
tmp->append(fileName);
GetFullPathNameA(tmp->getCString(), sizeof(buf), buf, &fp);
delete tmp;
path->clear();
path->append(buf);
return path;
#elif defined(ACORN)
//---------- RISCOS ----------
char *p;
int i;
path->append(".");
i = path->getLength();
path->append(fileName);
for (p = path->getCString() + i; *p; ++p) {
if (*p == '/') {
*p = '.';
} else if (*p == '.') {
*p = '/';
}
}
return path;
#elif defined(__EMX__)
//---------- OS/2+EMX ----------
int i;
// appending "." does nothing
if (!strcmp(fileName, "."))
return path;
// appending ".." goes up one directory
if (!strcmp(fileName, "..")) {
for (i = path->getLength() - 2; i >= 0; --i) {
if (path->getChar(i) == '/' || path->getChar(i) == '\\' ||
path->getChar(i) == ':')
break;
}
if (i <= 0) {
if (path->getChar(0) == '/' || path->getChar(0) == '\\') {
path->del(1, path->getLength() - 1);
} else if (path->getLength() >= 2 && path->getChar(1) == ':') {
path->del(2, path->getLength() - 2);
} else {
path->clear();
path->append("..");
}
} else {
if (path->getChar(i-1) == ':')
++i;
path->del(i, path->getLength() - i);
}
return path;
}
// otherwise, append "/" and new path component
if (path->getLength() > 0 &&
path->getChar(path->getLength() - 1) != '/' &&
path->getChar(path->getLength() - 1) != '\\')
path->append('/');
path->append(fileName);
return path;
#else
//---------- Unix ----------
int i;
// appending "." does nothing
if (!strcmp(fileName, "."))
return path;
// appending ".." goes up one directory
if (!strcmp(fileName, "..")) {
for (i = path->getLength() - 2; i >= 0; --i) {
if (path->getChar(i) == '/')
break;
}
if (i <= 0) {
if (path->getChar(0) == '/') {
path->del(1, path->getLength() - 1);
} else {
path->clear();
path->append("..");
}
} else {
path->del(i, path->getLength() - i);
}
return path;
}
// otherwise, append "/" and new path component
if (path->getLength() > 0 &&
path->getChar(path->getLength() - 1) != '/')
path->append('/');
path->append(fileName);
return path;
#endif
}
GString *grabPath(char *fileName) {
#ifdef VMS
//---------- VMS ----------
char *p;
if ((p = strrchr(fileName, ']')))
return new GString(fileName, p + 1 - fileName);
if ((p = strrchr(fileName, ':')))
return new GString(fileName, p + 1 - fileName);
return new GString();
#elif defined(__EMX__) || defined(_WIN32)
//---------- OS/2+EMX and Win32 ----------
char *p;
if ((p = strrchr(fileName, '/')))
return new GString(fileName, (int)(p - fileName));
if ((p = strrchr(fileName, '\\')))
return new GString(fileName, (int)(p - fileName));
if ((p = strrchr(fileName, ':')))
return new GString(fileName, (int)(p + 1 - fileName));
return new GString();
#elif defined(ACORN)
//---------- RISCOS ----------
char *p;
if ((p = strrchr(fileName, '.')))
return new GString(fileName, p - fileName);
return new GString();
#else
//---------- Unix ----------
char *p;
if ((p = strrchr(fileName, '/')))
return new GString(fileName, (int)(p - fileName));
return new GString();
#endif
}
GBool isAbsolutePath(char *path) {
#ifdef VMS
//---------- VMS ----------
return strchr(path, ':') ||
(path[0] == '[' && path[1] != '.' && path[1] != '-');
#elif defined(__EMX__) || defined(_WIN32)
//---------- OS/2+EMX and Win32 ----------
return path[0] == '/' || path[0] == '\\' || path[1] == ':';
#elif defined(ACORN)
//---------- RISCOS ----------
return path[0] == '$';
#else
//---------- Unix ----------
return path[0] == '/';
#endif
}
GString *makePathAbsolute(GString *path) {
#ifdef VMS
//---------- VMS ----------
char buf[PATH_MAX+1];
if (!isAbsolutePath(path->getCString())) {
if (getcwd(buf, sizeof(buf))) {
path->insert(0, buf);
}
}
return path;
#elif defined(_WIN32)
//---------- Win32 ----------
char buf[_MAX_PATH];
char *fp;
buf[0] = '\0';
if (!GetFullPathNameA(path->getCString(), _MAX_PATH, buf, &fp)) {
path->clear();
return path;
}
path->clear();
path->append(buf);
return path;
#elif defined(ACORN)
//---------- RISCOS ----------
path->insert(0, '@');
return path;
#else
//---------- Unix and OS/2+EMX ----------
struct passwd *pw;
char buf[PATH_MAX+1];
GString *s;
char *p1, *p2;
int n;
if (path->getChar(0) == '~') {
if (path->getChar(1) == '/' ||
#ifdef __EMX__
path->getChar(1) == '\\' ||
#endif
path->getLength() == 1) {
path->del(0, 1);
s = getHomeDir();
path->insert(0, s);
delete s;
} else {
p1 = path->getCString() + 1;
#ifdef __EMX__
for (p2 = p1; *p2 && *p2 != '/' && *p2 != '\\'; ++p2) ;
#else
for (p2 = p1; *p2 && *p2 != '/'; ++p2) ;
#endif
if ((n = (int)(p2 - p1)) > PATH_MAX)
n = PATH_MAX;
strncpy(buf, p1, n);
buf[n] = '\0';
if ((pw = getpwnam(buf))) {
path->del(0, (int)(p2 - p1 + 1));
path->insert(0, pw->pw_dir);
}
}
} else if (!isAbsolutePath(path->getCString())) {
if (getcwd(buf, sizeof(buf))) {
#ifndef __EMX__
path->insert(0, '/');
#endif
path->insert(0, buf);
}
}
return path;
#endif
}
time_t getModTime(char *fileName) {
#ifdef _WIN32
//~ should implement this, but it's (currently) only used in xpdf
return 0;
#else
struct stat statBuf;
if (stat(fileName, &statBuf)) {
return 0;
}
return statBuf.st_mtime;
#endif
}
GBool openTempFile(GString **name, FILE **f,
const char *mode, const char *ext) {
#if defined(_WIN32)
//---------- Win32 ----------
char tempPath[MAX_PATH + 1];
GString *s, *s2;
FILE *f2;
DWORD n;
int t, i;
// this has the standard race condition problem, but I haven't found
// a better way to generate temp file names with extensions on
// Windows
n = GetTempPathA(sizeof(tempPath), tempPath);
if (n > 0 && n <= sizeof(tempPath)) {
s = new GString(tempPath);
if (tempPath[n-1] != '\\') {
s->append('\\');
}
} else {
s = new GString(".\\");
}
s->appendf("xpdf_{0:d}_{1:d}_",
(int)GetCurrentProcessId(), (int)GetCurrentThreadId());
t = (int)time(NULL);
for (i = 0; i < 1000; ++i) {
s2 = GString::format("{0:t}{1:d}", s, t + i);
if (ext) {
s2->append(ext);
}
if (!(f2 = fopen(s2->getCString(), "r"))) {
if (!(f2 = fopen(s2->getCString(), mode))) {
delete s2;
delete s;
return gFalse;
}
*name = s2;
*f = f2;
delete s;
return gTrue;
}
fclose(f2);
delete s2;
}
delete s;
return gFalse;
#elif defined(VMS) || defined(__EMX__) || defined(ACORN)
//---------- non-Unix ----------
char *s;
// There is a security hole here: an attacker can create a symlink
// with this file name after the tmpnam call and before the fopen
// call. I will happily accept fixes to this function for non-Unix
// OSs.
if (!(s = tmpnam(NULL))) {
return gFalse;
}
*name = new GString(s);
if (ext) {
(*name)->append(ext);
}
if (!(*f = fopen((*name)->getCString(), mode))) {
delete (*name);
*name = NULL;
return gFalse;
}
return gTrue;
#else
//---------- Unix ----------
char *s;
int fd;
if (ext) {
#if HAVE_MKSTEMPS
if ((s = getenv("TMPDIR"))) {
*name = new GString(s);
} else {
*name = new GString("/tmp");
}
(*name)->append("/XXXXXX")->append(ext);
fd = mkstemps((*name)->getCString(), (int)strlen(ext));
#else
if (!(s = tmpnam(NULL))) {
return gFalse;
}
*name = new GString(s);
(*name)->append(ext);
fd = open((*name)->getCString(), O_WRONLY | O_CREAT | O_EXCL, 0600);
#endif
} else {
#if HAVE_MKSTEMP
if ((s = getenv("TMPDIR"))) {
*name = new GString(s);
} else {
*name = new GString("/tmp");
}
(*name)->append("/XXXXXX");
fd = mkstemp((*name)->getCString());
#else // HAVE_MKSTEMP
if (!(s = tmpnam(NULL))) {
return gFalse;
}
*name = new GString(s);
fd = open((*name)->getCString(), O_WRONLY | O_CREAT | O_EXCL, 0600);
#endif // HAVE_MKSTEMP
}
if (fd < 0 || !(*f = fdopen(fd, mode))) {
delete *name;
*name = NULL;
return gFalse;
}
return gTrue;
#endif
}
GBool createDir(char *path, int mode) {
#ifdef _WIN32
return !mkdir(path);
#else
return !mkdir(path, mode);
#endif
}
GBool executeCommand(char *cmd) {
#ifdef _IOS
#define _system_cmd run_cmd
#else
#define _system_cmd system
#endif
#ifdef VMS
return _system_cmd(cmd) ? gTrue : gFalse;
#else
return _system_cmd(cmd) ? gFalse : gTrue;
#endif
}
#ifdef _WIN32
GString *fileNameToUTF8(char *path) {
GString *s;
char *p;
s = new GString();
for (p = path; *p; ++p) {
if (*p & 0x80) {
s->append((char)(0xc0 | ((*p >> 6) & 0x03)));
s->append((char)(0x80 | (*p & 0x3f)));
} else {
s->append(*p);
}
}
return s;
}
GString *fileNameToUTF8(wchar_t *path) {
GString *s;
wchar_t *p;
s = new GString();
for (p = path; *p; ++p) {
if (*p < 0x80) {
s->append((char)*p);
} else if (*p < 0x800) {
s->append((char)(0xc0 | ((*p >> 6) & 0x1f)));
s->append((char)(0x80 | (*p & 0x3f)));
} else {
s->append((char)(0xe0 | ((*p >> 12) & 0x0f)));
s->append((char)(0x80 | ((*p >> 6) & 0x3f)));
s->append((char)(0x80 | (*p & 0x3f)));
}
}
return s;
}
wchar_t *fileNameToUCS2(const char *path, wchar_t *out, size_t outSize) {
const char *p;
size_t i;
for (p = path, i = 0; *p && i < outSize - 1; ++i) {
if ((p[0] & 0xe0) == 0xc0 &&
p[1] && (p[1] & 0xc0) == 0x80) {
out[i] = (wchar_t)(((p[0] & 0x1f) << 6) |
(p[1] & 0x3f));
p += 2;
} else if ((p[0] & 0xf0) == 0xe0 &&
(p[1] & 0xc0) == 0x80 &&
(p[2] & 0xc0) == 0x80) {
out[i] = (wchar_t)(((p[0] & 0x0f) << 12) |
((p[1] & 0x3f) << 6) |
(p[2] & 0x3f));
p += 3;
} else {
out[i] = (wchar_t)(p[0] & 0xff);
p += 1;
}
}
out[i] = (wchar_t)0;
return out;
}
#endif
FILE *openFile(const char *path, const char *mode) {
#if defined(_WIN32)
wchar_t wPath[_MAX_PATH + 1];
wchar_t wMode[8];
int i;
fileNameToUCS2(path, wPath, sizeof(wPath) / sizeof(wchar_t));
for (i = 0; mode[i] && i < sizeof(wMode)/sizeof(wchar_t) - 1; ++i) {
wMode[i] = (wchar_t)(mode[i] & 0xff);
}
wMode[i] = (wchar_t)0;
readWindowsShortcut(wPath, _MAX_PATH + 1);
return _wfopen(wPath, wMode);
#elif defined(VMS)
return fopen(path, mode, "ctx=stm");
#else
return fopen(path, mode);
#endif
}
#ifdef _WIN32
void readWindowsShortcut(wchar_t *wPath, size_t wPathSize) {
size_t n = wcslen(wPath);
if (n < 4 || wcscmp(wPath + n - 4, L".lnk")) {
return;
}
IShellLinkW *shellLink;
HRESULT hres;
hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER,
IID_IShellLinkW, (LPVOID *)&shellLink);
bool needCoUninit = false;
if (hres == CO_E_NOTINITIALIZED) {
CoInitialize(NULL);
needCoUninit = true;
hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER,
IID_IShellLinkW, (LPVOID *)&shellLink);
}
if (FAILED(hres)) {
return;
}
IPersistFile *persistFile;
hres = shellLink->QueryInterface(IID_IPersistFile, (LPVOID *)&persistFile);
if (FAILED(hres)) {
return;
}
hres = persistFile->Load(wPath, STGM_READ);
if (FAILED(hres)) {
fprintf(stderr, "IPersistFile.Load failed: 0x%08x\n", hres);
exit(1);
}
wchar_t target[_MAX_PATH + 1];
hres = shellLink->GetPath(target, _MAX_PATH + 1, NULL, 0);
if (FAILED(hres)) {
return;
}
shellLink->Release();
if (needCoUninit) {
CoUninitialize();
}
if (wcslen(target) > wPathSize - 1) {
return;
}
wcscpy(wPath, target);
}
#endif
int makeDir(const char *path, int mode) {
#ifdef _WIN32
wchar_t wPath[_MAX_PATH + 1];
return _wmkdir(fileNameToUCS2(path, wPath, sizeof(wPath) / sizeof(wchar_t)));
#else
return mkdir(path, (mode_t)mode);
#endif
}
char *getLine(char *buf, int size, FILE *f) {
int c, i;
i = 0;
while (i < size - 1) {
if ((c = fgetc(f)) == EOF) {
break;
}
buf[i++] = (char)c;
if (c == '\x0a') {
break;
}
if (c == '\x0d') {
c = fgetc(f);
if (c == '\x0a' && i < size - 1) {
buf[i++] = (char)c;
} else if (c != EOF) {
ungetc(c, f);
}
break;
}
}
buf[i] = '\0';
if (i == 0) {
return NULL;
}
return buf;
}
int gfseek(FILE *f, GFileOffset offset, int whence) {
#if HAVE_FSEEKO
return fseeko(f, offset, whence);
#elif HAVE_FSEEK64
return fseek64(f, offset, whence);
#elif HAVE_FSEEKI64
return _fseeki64(f, offset, whence);
#else
return fseek(f, offset, whence);
#endif
}
GFileOffset gftell(FILE *f) {
#if HAVE_FSEEKO
return ftello(f);
#elif HAVE_FSEEK64
return ftell64(f);
#elif HAVE_FSEEKI64
return _ftelli64(f);
#else
return ftell(f);
#endif
}
void fixCommandLine(int *argc, char **argv[]) {
#ifdef _WIN32
int argcw;
wchar_t **argvw;
GString *arg;
int i;
argvw = CommandLineToArgvW(GetCommandLineW(), &argcw);
if (!argvw || argcw < 0) {
return;
}
*argc = argcw;
*argv = (char **)gmallocn(argcw + 1, sizeof(char *));
for (i = 0; i < argcw; ++i) {
arg = fileNameToUTF8(argvw[i]);
(*argv)[i] = copyString(arg->getCString());
delete arg;
}
(*argv)[argcw] = NULL;
LocalFree(argvw);
#endif
}