dolphin/Source/Core/Common/Src/StringUtil.cpp

374 lines
7.9 KiB
C++
Raw Normal View History

// Copyright (C) 2003-2008 Dolphin Project.
// 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, version 2.0.
// 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 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include <stdlib.h>
#include <stdio.h>
#include "StringUtil.h"
#include "TestFramework.h"
// faster than sscanf
bool AsciiToHex(const char* _szValue, u32& result)
{
u32 value = 0;
size_t finish = strlen(_szValue);
if (finish > 8)
finish = 8; // Max 32-bit values are supported.
for (size_t count = 0; count < finish; count++)
{
value <<= 4;
switch (_szValue[count])
{
case '0': break;
case '1': value += 1; break;
case '2': value += 2; break;
case '3': value += 3; break;
case '4': value += 4; break;
case '5': value += 5; break;
case '6': value += 6; break;
case '7': value += 7; break;
case '8': value += 8; break;
case '9': value += 9; break;
case 'A':
case 'a': value += 10; break;
case 'B':
case 'b': value += 11; break;
case 'C':
case 'c': value += 12; break;
case 'D':
case 'd': value += 13; break;
case 'E':
case 'e': value += 14; break;
case 'F':
case 'f': value += 15; break;
default:
return false;
break;
}
}
result = value;
return (true);
}
bool CharArrayFromFormatV(char* out, int outsize, const char* format, va_list args)
{
int writtenCount = vsnprintf(out, outsize, format, args);
if (writtenCount > 0 && writtenCount < outsize)
{
out[writtenCount] = '\0';
return true;
}
else
{
out[outsize - 1] = '\0';
return false;
}
}
// Expensive!
void StringFromFormatV(std::string* out, const char* format, va_list args)
{
int writtenCount = -1;
size_t newSize = strlen(format) + 16;
char* buf = 0;
while (writtenCount < 0)
{
delete [] buf;
buf = new char[newSize + 1];
writtenCount = vsnprintf(buf, newSize, format, args);
if (writtenCount > (int)newSize)
writtenCount = -1;
// ARGH! vsnprintf does no longer return -1 on truncation in newer libc!
// WORKAROUND! let's fake the old behaviour (even though it's less efficient).
// TODO: figure out why the fix causes an invalid read in strlen called from vsnprintf :(
// if (writtenCount >= (int)newSize)
// writtenCount = -1;
newSize *= 2;
}
buf[writtenCount] = '\0';
*out = buf;
delete[] buf;
}
std::string StringFromFormat(const char* format, ...)
{
std::string temp;
va_list args;
va_start(args, format);
StringFromFormatV(&temp, format, args);
va_end(args);
return(temp);
}
void ToStringFromFormat(std::string* out, const char* format, ...)
{
va_list args;
va_start(args, format);
StringFromFormatV(out, format, args);
va_end(args);
}
// Turns " hej " into "hej". Also handles tabs.
std::string StripSpaces(const std::string &str)
{
std::string s = str;
int i;
for (i = 0; i < (int)s.size(); i++)
{
if ((s[i] != ' ') && (s[i] != 9))
{
break;
}
}
s = s.substr(i);
for (i = (int)s.size() - 1; i > 0; i--)
{
if ((s[i] != ' ') && (s[i] != 9))
{
break;
}
}
return s.substr(0, i + 1);
}
// "\"hello\"" is turned to "hello"
// This one assumes that the string has already been space stripped in both
// ends, as done by StripSpaces above, for example.
std::string StripQuotes(const std::string& s)
{
if ((s[0] == '\"') && (s[s.size() - 1] == '\"'))
return s.substr(1, s.size() - 2);
else
return s;
}
// "\"hello\"" is turned to "hello"
// This one assumes that the string has already been space stripped in both
// ends, as done by StripSpaces above, for example.
std::string StripNewline(const std::string& s)
{
if (!s.size())
return s;
else if (s[s.size() - 1] == '\n')
return s.substr(0, s.size() - 1);
else
return s;
}
bool TryParseInt(const char* str, int* outVal)
{
const char* s = str;
int value = 0;
bool negativ = false;
if (*s == '-')
{
negativ = true;
s++;
}
while (*s)
{
char c = *s++;
if ((c < '0') || (c > '9'))
{
return false;
}
value = value * 10 + (c - '0');
}
if (negativ)
value = -value;
*outVal = value;
return true;
}
bool TryParseBool(const char* str, bool* output)
{
if ((str[0] == '1') || !strcmp(str, "true") || !strcmp(str, "True") || !strcmp(str, "TRUE"))
{
*output = true;
return true;
}
else if (str[0] == '0' || !strcmp(str, "false") || !strcmp(str, "False") || !strcmp(str, "FALSE"))
{
*output = false;
return true;
}
return false;
}
std::string StringFromInt(int value)
{
char temp[16];
sprintf(temp, "%i", value);
return std::string(temp);
}
std::string StringFromBool(bool value)
{
return value ? "True" : "False";
}
#ifdef _WIN32
bool SplitPath(const std::string& full_path, std::string* _pPath, std::string* _pFilename, std::string* _pExtension)
{
char drive[_MAX_DRIVE];
char dir[_MAX_DIR];
char fname[_MAX_FNAME];
char ext[_MAX_EXT];
if (_splitpath_s(full_path.c_str(), drive, _MAX_DRIVE, dir, _MAX_DIR, fname, _MAX_FNAME, ext, _MAX_EXT) == 0)
{
if (_pPath)
{
*_pPath = std::string(drive) + std::string(dir);
}
if (_pFilename != 0)
{
*_pFilename = fname;
}
if (_pExtension != 0)
{
*_pExtension = ext;
}
return true;
}
return false;
}
#else
bool SplitPath(const std::string& full_path, std::string* _pPath, std::string* _pFilename, std::string* _pExtension)
{
size_t last_slash = full_path.rfind('/');
if (last_slash == std::string::npos)
{
return false;
}
size_t last_dot = full_path.rfind('.');
if ((last_dot == std::string::npos) || (last_dot < last_slash))
{
return false;
}
if (_pPath)
{
*_pPath = full_path.substr(0, last_slash + 1);
}
if (_pFilename)
{
*_pFilename = full_path.substr(last_slash + 1, last_dot - (last_slash + 1));
}
if (_pExtension)
{
*_pExtension = full_path.substr(last_dot + 1);
_pExtension->insert(0, ".");
}
else if (_pFilename)
{
*_pFilename += full_path.substr(last_dot);
}
return true;
}
#endif
void BuildCompleteFilename(std::string& _CompleteFilename, const std::string& _Path, const std::string& _Filename)
{
_CompleteFilename = _Path;
// check for seperator
if (_CompleteFilename[_CompleteFilename.size() - 1] != '\\')
{
_CompleteFilename += "\\";
}
// add the filename
_CompleteFilename += _Filename;
}
void SplitString(const std::string& str, const std::string& delim, std::vector<std::string>& output)
{
output.clear();
size_t offset = 0;
size_t delimIndex = 0;
delimIndex = str.find(delim, offset);
while (delimIndex != std::string::npos)
{
output.push_back(str.substr(offset, delimIndex - offset));
offset += delimIndex - offset + delim.length();
delimIndex = str.find(delim, offset);
}
output.push_back(str.substr(offset));
}
bool TryParseUInt(const std::string& str, u32* output)
{
if (!strcmp(str.substr(0, 2).c_str(), "0x") || !strcmp(str.substr(0, 2).c_str(), "0X"))
return sscanf(str.c_str() + 2, "%x", output) > 0;
else
return sscanf(str.c_str(), "%d", output) > 0;
}
int ChooseStringFrom(const char* str, const char* * items)
{
int i = 0;
while (items[i] != 0)
{
if (!strcmp(str, items[i]))
return i;
i++;
}
return -1;
}