#ifndef lint
static char rcsid[] = "@(#$Id: readfile.cpp,v 1.9 2008-12-08 11:22:58 dockes Exp $ (C) 2004 J.F.Dockes";
#endif
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef TEST_READFILE
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifndef O_STREAMING
#define O_STREAMING 0
#endif
#include <errno.h>
#include <cstring>
#include <string>
#ifndef NO_NAMESPACES
using std::string;
#endif /* NO_NAMESPACES */
#include "readfile.h"
static void caterrno(string *reason, const char *what)
{
if (reason) {
reason->append("file_to_string: ");
reason->append(what);
reason->append(": ");
#ifdef sun
// Note: sun strerror is noted mt-safe ??
reason->append(strerror(errno));
#else
#define ERRBUFSZ 200
char errbuf[ERRBUFSZ];
strerror_r(errno, errbuf, ERRBUFSZ);
reason->append(errbuf);
#endif
}
}
class FileToString : public FileScanDo {
public:
FileToString(string& data) : m_data(data) {}
string& m_data;
bool init(unsigned int size, string *reason) {
if (size > 0)
m_data.reserve(size);
return true;
}
bool data(const char *buf, int cnt, string *reason) {
try {
m_data.append(buf, cnt);
} catch (...) {
caterrno(reason, "append");
return false;
}
return true;
}
};
bool file_to_string(const string &fn, string &data, string *reason)
{
FileToString accum(data);
return file_scan(fn, &accum, reason);
}
// Note: the fstat() + reserve() (in init()) calls divide cpu usage almost by 2
// on both linux i586 and macosx (compared to just append())
// Also tried a version with mmap, but it's actually slower on the mac and not
// faster on linux.
bool file_scan(const string &fn, FileScanDo* doer, string *reason)
{
bool ret = false;
bool noclosing = true;
int fd = 0;
struct stat st;
// Initialize st_size: if fn.empty() , the fstat() call won't happen.
st.st_size = 0;
// If we have a file name, open it, else use stdin.
if (!fn.empty()) {
fd = open(fn.c_str(), O_RDONLY|O_STREAMING);
if (fd < 0 || fstat(fd, &st) < 0) {
caterrno(reason, "open/stat");
return false;
}
noclosing = false;
}
if (st.st_size > 0)
doer->init(st.st_size+1, reason);
else
doer->init(0, reason);
char buf[4096];
for (;;) {
int n = read(fd, buf, 4096);
if (n < 0) {
caterrno(reason, "read");
goto out;
}
if (n == 0)
break;
if (!doer->data(buf, n, reason)) {
goto out;
}
}
ret = true;
out:
if (fd >= 0 && !noclosing)
close(fd);
return ret;
}
#else // Test
#include <sys/stat.h>
#include <stdlib.h>
#include <string>
#include <iostream>
using namespace std;
#include "readfile.h"
#include "fstreewalk.h"
using namespace std;
static int op_flags;
#define OPT_MOINS 0x1
#define OPT_f 0x2
#define OPT_F 0x4
class myCB : public FsTreeWalkerCB {
public:
FsTreeWalker::Status processone(const string &path,
const struct stat *st,
FsTreeWalker::CbFlag flg)
{
if (flg == FsTreeWalker::FtwDirEnter) {
//cout << "[Entering " << path << "]" << endl;
} else if (flg == FsTreeWalker::FtwDirReturn) {
//cout << "[Returning to " << path << "]" << endl;
} else if (flg == FsTreeWalker::FtwRegular) {
//cout << path << endl;
string s, reason;
if (!file_to_string(path, s, &reason)) {
cerr << "Failed: " << reason << " : " << path << endl;
} else {
//cout <<
//"================================================" << endl;
cout << path << endl;
// cout << s;
}
reason.clear();
}
return FsTreeWalker::FtwOk;
}
};
static const char *thisprog;
static char usage [] =
"trreadfile topdirorfile\n\n"
;
static void
Usage(void)
{
fprintf(stderr, "%s: usage:\n%s", thisprog, usage);
exit(1);
}
int main(int argc, const char **argv)
{
list<string> patterns;
list<string> paths;
thisprog = argv[0];
argc--; argv++;
while (argc > 0 && **argv == '-') {
(*argv)++;
if (!(**argv))
/* Cas du "adb - core" */
Usage();
while (**argv)
switch (*(*argv)++) {
case 'f': op_flags |= OPT_f;break;
case 'F': op_flags |= OPT_F;break;
default: Usage(); break;
}
argc--; argv++;
}
if (argc != 1)
Usage();
string top = *argv++;argc--;
struct stat st;
if (stat(top.c_str(), &st) < 0) {
perror("stat");
exit(1);
}
if (S_ISDIR(st.st_mode)) {
FsTreeWalker walker;
myCB cb;
walker.walk(top, cb);
if (walker.getErrCnt() > 0)
cout << walker.getReason();
} else if (S_ISREG(st.st_mode)) {
string s, reason;
if (!file_to_string(top, s, &reason)) {
cerr << reason << endl;
exit(1);
} else {
cout << s;
}
}
exit(0);
}
#endif //TEST_READFILE