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/**************************************************************************
*
* Copyright 2011 Jose Fonseca
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
**************************************************************************/
/*
* String manipulation.
*/
#ifndef _OS_STRING_HPP_
#define _OS_STRING_HPP_
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stddef.h>
#ifdef __MINGW32__
// Some versions of MinGW are missing _vscprintf's declaration, although they
// still provide the symbol in the import library.
extern "C" _CRTIMP int _vscprintf(const char *format, va_list argptr);
#endif
#ifndef va_copy
#ifdef __va_copy
#define va_copy(dest, src) __va_copy((dest), (src))
#else
#define va_copy(dest, src) (dest) = (src)
#endif
#endif
#include <vector>
#include "os.hpp"
#ifdef _WIN32
#define OS_DIR_SEP '\\'
#else /* !_WIN32 */
#define OS_DIR_SEP '/'
#endif /* !_WIN32 */
namespace os {
/**
* Vector based zero-terminate string, suitable for passing strings or paths
* to/from OS calls.
*/
class String {
protected:
typedef std::vector<char> Buffer;
/**
* The buffer's last element is always the '\0' character, therefore the
* buffer must never be empty.
*/
Buffer buffer;
Buffer::iterator find(char c) {
Buffer::iterator it = buffer.begin();
assert(it != buffer.end());
while (it != buffer.end()) {
if (*it == c) {
return it;
}
++it;
}
return buffer.end();
}
Buffer::iterator rfind(char c) {
Buffer::iterator it = buffer.end();
// Skip trailing '\0'
assert(it != buffer.begin());
--it;
assert(*it == '\0');
while (it != buffer.begin()) {
--it;
if (*it == c) {
return it;
}
}
return buffer.end();
}
String(size_t size) :
buffer(size) {
}
char *buf(void) {
return &buffer[0];
}
inline bool
isSep(char c) {
if (c == '/') {
return true;
}
#ifdef _WIN32
if (c == '\\') {
return true;
}
#endif
return false;
}
Buffer::iterator rfindSep(void) {
Buffer::iterator it = buffer.end();
// Skip trailing '\0'
assert(it != buffer.begin());
--it;
assert(*it == '\0');
// Skip trailing separators
while (it != buffer.begin()) {
--it;
if (isSep(*it)) {
// Halt if find the root
if (it == buffer.begin()) {
return it;
}
} else {
break;
}
}
// Advance to the last separator
while (it != buffer.begin()) {
--it;
if (isSep(*it)) {
return it;
}
}
return buffer.end();
}
public:
/*
* Constructors
*/
String() {
buffer.push_back(0);
}
String(const char *s) :
buffer(s, s + strlen(s) + 1)
{}
String(const String &other) :
buffer(other.buffer)
{}
template <class InputIterator>
String(InputIterator first, InputIterator last) :
buffer(first, last)
{
buffer.push_back(0);
}
/**
* From a printf-like format string
*/
static String
format(const char *format, ...)
#ifdef __GNUC__
__attribute__ ((format (printf, 1, 2)))
#endif
{
va_list args;
va_start(args, format);
int length;
va_list args_copy;
va_copy(args_copy, args);
#ifdef _WIN32
/* We need to use _vscprintf to calculate the length as vsnprintf returns -1
* if the number of characters to write is greater than count.
*/
length = _vscprintf(format, args_copy);
#else
char dummy;
length = vsnprintf(&dummy, sizeof dummy, format, args_copy);
#endif
va_end(args_copy);
assert(length >= 0);
size_t size = length + 1;
String path(size);
va_start(args, format);
vsnprintf(path.buf(), size, format, args);
va_end(args);
return path;
}
/*
* Conversion to ordinary C strings.
*/
const char *str(void) const {
assert(buffer.back() == 0);
return &buffer[0];
}
operator const char *(void) const {
return str();
}
/*
* Iterators
*/
typedef Buffer::const_iterator const_iterator;
typedef Buffer::iterator iterator;
const_iterator begin(void) const {
return buffer.begin();
}
iterator begin(void) {
return buffer.begin();
}
const_iterator end(void) const {
const_iterator it = buffer.end();
assert(it != buffer.begin());
--it; // skip null
return it;
}
iterator end(void) {
iterator it = buffer.end();
assert(it != buffer.begin());
--it; // skip null
return it;
}
/*
* Operations
*/
void insert(iterator position, char c) {
buffer.insert(position, c);
}
template <class InputIterator>
void insert(iterator position, InputIterator first, InputIterator last) {
buffer.insert(position, first, last);
}
void insert(iterator position, const char *s) {
assert(s);
insert(position, s, s + strlen(s));
}
void insert(iterator position, const String & other) {
insert(position, other.begin(), other.end());
}
void append(char c) {
insert(end(), c);
}
template <class InputIterator>
void append(InputIterator first, InputIterator last) {
insert(end(), first, last);
}
void append(const char *s) {
insert(end(), s);
}
void append(const String & other) {
insert(end(), other);
}
char *buf(size_t size) {
buffer.resize(size);
return &buffer[0];
}
size_t length(void) const {
size_t size = buffer.size();
assert(size > 0);
assert(buffer[size - 1] == 0);
return size - 1;
}
void truncate(size_t length) {
assert(length < buffer.size());
buffer[length] = 0;
buffer.resize(length + 1);
}
void truncate(void) {
truncate(strlen(str()));
}
/*
* Path manipulation
*/
bool
exists(void) const;
/* Trim directory (leaving base filename).
*/
void trimDirectory(void) {
iterator sep = rfindSep();
if (sep != buffer.end()) {
buffer.erase(buffer.begin(), sep + 1);
}
}
/* Trim filename component (leaving containing directory).
*
* - trailing separators are ignored
* - a path with no separator at all yields "."
* - a path consisting of just the root directory is left unchanged
*/
void trimFilename(void) {
iterator sep = rfindSep();
// No separator found, so return '.'
if (sep == buffer.end()) {
buffer.resize(2);
buffer[0] = '.';
buffer[1] = 0;
return;
}
// Root. Nothing to do.
if (sep == buffer.begin()) {
return;
}
// Trim filename
buffer.erase(sep, end());
}
void trimExtension(void) {
iterator dot = rfind('.');
if (dot != buffer.end()) {
buffer.erase(dot, end());
}
}
void join(const String & other) {
if (length() && end()[-1] != OS_DIR_SEP) {
append(OS_DIR_SEP);
}
append(other.begin(), other.end());
}
};
String getProcessName();
String getCurrentDir();
bool copyFile(const String &srcFileName, const String &dstFileName, bool override = true);
bool removeFile(const String &fileName);
} /* namespace os */
#endif /* _OS_STRING_HPP_ */
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