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///////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2008-2010, Sony Pictures Imageworks Inc
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// Neither the name of the organization Sony Pictures Imageworks nor the
// names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER
// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
///////////////////////////////////////////////////////////////////////////////
#include "pystring.h"
#include <algorithm>
#include <cctype>
#include <cstring>
#include <iostream>
#include <sstream>
namespace pystring
{
#if defined(_WIN32) || defined(_WIN64) || defined(_WINDOWS) || defined(_MSC_VER)
#ifndef WINDOWS
#define WINDOWS
#endif
#endif
// This definition codes from configure.in in the python src.
// Strictly speaking this limits us to str sizes of 2**31.
// Should we wish to handle this limit, we could use an architecture
// specific #defines and read from ssize_t (unistd.h) if the header exists.
// But in the meantime, the use of int assures maximum arch compatibility.
// This must also equal the size used in the end = MAX_32BIT_INT default arg.
typedef int Py_ssize_t;
const std::string forward_slash = "/";
const std::string double_forward_slash = "//";
const std::string triple_forward_slash = "///";
const std::string double_back_slash = "\\";
const std::string empty_string = "";
const std::string dot = ".";
const std::string double_dot = "..";
const std::string colon = ":";
/* helper macro to fixup start/end slice values */
#define ADJUST_INDICES(start, end, len) \
if (end > len) \
end = len; \
else if (end < 0) { \
end += len; \
if (end < 0) \
end = 0; \
} \
if (start < 0) { \
start += len; \
if (start < 0) \
start = 0; \
}
namespace {
//////////////////////////////////////////////////////////////////////////////////////////////
/// why doesn't the std::reverse work?
///
void reverse_strings( std::vector< std::string > & result)
{
for (std::vector< std::string >::size_type i = 0; i < result.size() / 2; i++ )
{
std::swap(result[i], result[result.size() - 1 - i]);
}
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
void split_whitespace( const std::string & str, std::vector< std::string > & result, int maxsplit )
{
std::string::size_type i, j, len = str.size();
for (i = j = 0; i < len; )
{
while ( i < len && ::isspace( str[i] ) ) i++;
j = i;
while ( i < len && ! ::isspace( str[i]) ) i++;
if (j < i)
{
if ( maxsplit-- <= 0 ) break;
result.push_back( str.substr( j, i - j ));
while ( i < len && ::isspace( str[i])) i++;
j = i;
}
}
if (j < len)
{
result.push_back( str.substr( j, len - j ));
}
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
void rsplit_whitespace( const std::string & str, std::vector< std::string > & result, int maxsplit )
{
std::string::size_type len = str.size();
std::string::size_type i, j;
for (i = j = len; i > 0; )
{
while ( i > 0 && ::isspace( str[i - 1] ) ) i--;
j = i;
while ( i > 0 && ! ::isspace( str[i - 1]) ) i--;
if (j > i)
{
if ( maxsplit-- <= 0 ) break;
result.push_back( str.substr( i, j - i ));
while ( i > 0 && ::isspace( str[i - 1])) i--;
j = i;
}
}
if (j > 0)
{
result.push_back( str.substr( 0, j ));
}
//std::reverse( result, result.begin(), result.end() );
reverse_strings( result );
}
} //anonymous namespace
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
void split( const std::string & str, std::vector< std::string > & result, const std::string & sep, int maxsplit )
{
result.clear();
if ( maxsplit < 0 ) maxsplit = MAX_32BIT_INT;//result.max_size();
if ( sep.size() == 0 )
{
split_whitespace( str, result, maxsplit );
return;
}
std::string::size_type i,j, len = str.size(), n = sep.size();
i = j = 0;
while ( i+n <= len )
{
if ( str[i] == sep[0] && str.substr( i, n ) == sep )
{
if ( maxsplit-- <= 0 ) break;
result.push_back( str.substr( j, i - j ) );
i = j = i + n;
}
else
{
i++;
}
}
result.push_back( str.substr( j, len-j ) );
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
void rsplit( const std::string & str, std::vector< std::string > & result, const std::string & sep, int maxsplit )
{
if ( maxsplit < 0 )
{
split( str, result, sep, maxsplit );
return;
}
result.clear();
if ( sep.size() == 0 )
{
rsplit_whitespace( str, result, maxsplit );
return;
}
Py_ssize_t i,j, len = (Py_ssize_t) str.size(), n = (Py_ssize_t) sep.size();
i = j = len;
while ( i >= n )
{
if ( str[i - 1] == sep[n - 1] && str.substr( i - n, n ) == sep )
{
if ( maxsplit-- <= 0 ) break;
result.push_back( str.substr( i, j - i ) );
i = j = i - n;
}
else
{
i--;
}
}
result.push_back( str.substr( 0, j ) );
reverse_strings( result );
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
#define LEFTSTRIP 0
#define RIGHTSTRIP 1
#define BOTHSTRIP 2
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string do_strip( const std::string & str, int striptype, const std::string & chars )
{
Py_ssize_t len = (Py_ssize_t) str.size(), i, j, charslen = (Py_ssize_t) chars.size();
if ( charslen == 0 )
{
i = 0;
if ( striptype != RIGHTSTRIP )
{
while ( i < len && ::isspace( str[i] ) )
{
i++;
}
}
j = len;
if ( striptype != LEFTSTRIP )
{
do
{
j--;
}
while (j >= i && ::isspace(str[j]));
j++;
}
}
else
{
const char * sep = chars.c_str();
i = 0;
if ( striptype != RIGHTSTRIP )
{
while ( i < len && memchr(sep, str[i], charslen) )
{
i++;
}
}
j = len;
if (striptype != LEFTSTRIP)
{
do
{
j--;
}
while (j >= i && memchr(sep, str[j], charslen) );
j++;
}
}
if ( i == 0 && j == len )
{
return str;
}
else
{
return str.substr( i, j - i );
}
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
void partition( const std::string & str, const std::string & sep, std::vector< std::string > & result )
{
result.resize(3);
int index = find( str, sep );
if ( index < 0 )
{
result[0] = str;
result[1] = empty_string;
result[2] = empty_string;
}
else
{
result[0] = str.substr( 0, index );
result[1] = sep;
result[2] = str.substr( index + sep.size(), str.size() );
}
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
void rpartition( const std::string & str, const std::string & sep, std::vector< std::string > & result )
{
result.resize(3);
int index = rfind( str, sep );
if ( index < 0 )
{
result[0] = empty_string;
result[1] = empty_string;
result[2] = str;
}
else
{
result[0] = str.substr( 0, index );
result[1] = sep;
result[2] = str.substr( index + sep.size(), str.size() );
}
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string strip( const std::string & str, const std::string & chars )
{
return do_strip( str, BOTHSTRIP, chars );
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string lstrip( const std::string & str, const std::string & chars )
{
return do_strip( str, LEFTSTRIP, chars );
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string rstrip( const std::string & str, const std::string & chars )
{
return do_strip( str, RIGHTSTRIP, chars );
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string join( const std::string & str, const std::vector< std::string > & seq )
{
std::vector< std::string >::size_type seqlen = seq.size(), i;
if ( seqlen == 0 ) return empty_string;
if ( seqlen == 1 ) return seq[0];
std::string result( seq[0] );
for ( i = 1; i < seqlen; ++i )
{
result += str + seq[i];
}
return result;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
namespace
{
/* Matches the end (direction >= 0) or start (direction < 0) of self
* against substr, using the start and end arguments. Returns
* -1 on error, 0 if not found and 1 if found.
*/
int _string_tailmatch(const std::string & self, const std::string & substr,
Py_ssize_t start, Py_ssize_t end,
int direction)
{
Py_ssize_t len = (Py_ssize_t) self.size();
Py_ssize_t slen = (Py_ssize_t) substr.size();
const char* sub = substr.c_str();
const char* str = self.c_str();
ADJUST_INDICES(start, end, len);
if (direction < 0) {
// startswith
if (start+slen > len)
return 0;
} else {
// endswith
if (end-start < slen || start > len)
return 0;
if (end-slen > start)
start = end - slen;
}
if (end-start >= slen)
return (!std::memcmp(str+start, sub, slen));
return 0;
}
}
bool endswith( const std::string & str, const std::string & suffix, int start, int end )
{
int result = _string_tailmatch(str, suffix,
(Py_ssize_t) start, (Py_ssize_t) end, +1);
//if (result == -1) // TODO: Error condition
return static_cast<bool>(result);
}
bool startswith( const std::string & str, const std::string & prefix, int start, int end )
{
int result = _string_tailmatch(str, prefix,
(Py_ssize_t) start, (Py_ssize_t) end, -1);
//if (result == -1) // TODO: Error condition
return static_cast<bool>(result);
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
bool isalnum( const std::string & str )
{
std::string::size_type len = str.size(), i;
if ( len == 0 ) return false;
if( len == 1 )
{
return ::isalnum( str[0] );
}
for ( i = 0; i < len; ++i )
{
if ( !::isalnum( str[i] ) ) return false;
}
return true;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
bool isalpha( const std::string & str )
{
std::string::size_type len = str.size(), i;
if ( len == 0 ) return false;
if( len == 1 ) return ::isalpha( (int) str[0] );
for ( i = 0; i < len; ++i )
{
if ( !::isalpha( (int) str[i] ) ) return false;
}
return true;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
bool isdigit( const std::string & str )
{
std::string::size_type len = str.size(), i;
if ( len == 0 ) return false;
if( len == 1 ) return ::isdigit( str[0] );
for ( i = 0; i < len; ++i )
{
if ( ! ::isdigit( str[i] ) ) return false;
}
return true;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
bool islower( const std::string & str )
{
std::string::size_type len = str.size(), i;
if ( len == 0 ) return false;
if( len == 1 ) return ::islower( str[0] );
for ( i = 0; i < len; ++i )
{
if ( !::islower( str[i] ) ) return false;
}
return true;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
bool isspace( const std::string & str )
{
std::string::size_type len = str.size(), i;
if ( len == 0 ) return false;
if( len == 1 ) return ::isspace( str[0] );
for ( i = 0; i < len; ++i )
{
if ( !::isspace( str[i] ) ) return false;
}
return true;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
bool istitle( const std::string & str )
{
std::string::size_type len = str.size(), i;
if ( len == 0 ) return false;
if ( len == 1 ) return ::isupper( str[0] );
bool cased = false, previous_is_cased = false;
for ( i = 0; i < len; ++i )
{
if ( ::isupper( str[i] ) )
{
if ( previous_is_cased )
{
return false;
}
previous_is_cased = true;
cased = true;
}
else if ( ::islower( str[i] ) )
{
if (!previous_is_cased)
{
return false;
}
previous_is_cased = true;
cased = true;
}
else
{
previous_is_cased = false;
}
}
return cased;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
bool isupper( const std::string & str )
{
std::string::size_type len = str.size(), i;
if ( len == 0 ) return false;
if( len == 1 ) return ::isupper( str[0] );
for ( i = 0; i < len; ++i )
{
if ( !::isupper( str[i] ) ) return false;
}
return true;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string capitalize( const std::string & str )
{
std::string s( str );
std::string::size_type len = s.size(), i;
if ( len > 0)
{
if (::islower(s[0])) s[0] = (char) ::toupper( s[0] );
}
for ( i = 1; i < len; ++i )
{
if (::isupper(s[i])) s[i] = (char) ::tolower( s[i] );
}
return s;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string lower( const std::string & str )
{
std::string s( str );
std::string::size_type len = s.size(), i;
for ( i = 0; i < len; ++i )
{
if ( ::isupper( s[i] ) ) s[i] = (char) ::tolower( s[i] );
}
return s;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string upper( const std::string & str )
{
std::string s( str ) ;
std::string::size_type len = s.size(), i;
for ( i = 0; i < len; ++i )
{
if ( ::islower( s[i] ) ) s[i] = (char) ::toupper( s[i] );
}
return s;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string swapcase( const std::string & str )
{
std::string s( str );
std::string::size_type len = s.size(), i;
for ( i = 0; i < len; ++i )
{
if ( ::islower( s[i] ) ) s[i] = (char) ::toupper( s[i] );
else if (::isupper( s[i] ) ) s[i] = (char) ::tolower( s[i] );
}
return s;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string title( const std::string & str )
{
std::string s( str );
std::string::size_type len = s.size(), i;
bool previous_is_cased = false;
for ( i = 0; i < len; ++i )
{
int c = s[i];
if ( ::islower(c) )
{
if ( !previous_is_cased )
{
s[i] = (char) ::toupper(c);
}
previous_is_cased = true;
}
else if ( ::isupper(c) )
{
if ( previous_is_cased )
{
s[i] = (char) ::tolower(c);
}
previous_is_cased = true;
}
else
{
previous_is_cased = false;
}
}
return s;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string translate( const std::string & str, const std::string & table, const std::string & deletechars )
{
std::string s;
std::string::size_type len = str.size(), dellen = deletechars.size();
if ( table.size() != 256 )
{
// TODO : raise exception instead
return str;
}
//if nothing is deleted, use faster code
if ( dellen == 0 )
{
s = str;
for ( std::string::size_type i = 0; i < len; ++i )
{
s[i] = table[ s[i] ];
}
return s;
}
int trans_table[256];
for ( int i = 0; i < 256; i++)
{
trans_table[i] = table[i];
}
for ( std::string::size_type i = 0; i < dellen; i++)
{
trans_table[(int) deletechars[i] ] = -1;
}
for ( std::string::size_type i = 0; i < len; ++i )
{
if ( trans_table[ (int) str[i] ] != -1 )
{
s += table[ str[i] ];
}
}
return s;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string zfill( const std::string & str, int width )
{
int len = (int)str.size();
if ( len >= width )
{
return str;
}
std::string s( str );
int fill = width - len;
s = std::string( fill, '0' ) + s;
if ( s[fill] == '+' || s[fill] == '-' )
{
s[0] = s[fill];
s[fill] = '0';
}
return s;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string ljust( const std::string & str, int width )
{
std::string::size_type len = str.size();
if ( (( int ) len ) >= width ) return str;
return str + std::string( width - len, ' ' );
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string rjust( const std::string & str, int width )
{
std::string::size_type len = str.size();
if ( (( int ) len ) >= width ) return str;
return std::string( width - len, ' ' ) + str;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string center( const std::string & str, int width )
{
int len = (int) str.size();
int marg, left;
if ( len >= width ) return str;
marg = width - len;
left = marg / 2 + (marg & width & 1);
return std::string( left, ' ' ) + str + std::string( marg - left, ' ' );
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string slice( const std::string & str, int start, int end )
{
ADJUST_INDICES(start, end, (int) str.size());
if ( start >= end ) return empty_string;
return str.substr( start, end - start );
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
int find( const std::string & str, const std::string & sub, int start, int end )
{
ADJUST_INDICES(start, end, (int) str.size());
std::string::size_type result = str.find( sub, start );
// If we cannot find the string, or if the end-point of our found substring is past
// the allowed end limit, return that it can't be found.
if( result == std::string::npos ||
(result + sub.size() > (std::string::size_type)end) )
{
return -1;
}
return (int) result;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
int index( const std::string & str, const std::string & sub, int start, int end )
{
return find( str, sub, start, end );
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
int rfind( const std::string & str, const std::string & sub, int start, int end )
{
ADJUST_INDICES(start, end, (int) str.size());
std::string::size_type result = str.rfind( sub, end );
if( result == std::string::npos ||
result < (std::string::size_type)start ||
(result + sub.size() > (std::string::size_type)end))
return -1;
return (int)result;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
int rindex( const std::string & str, const std::string & sub, int start, int end )
{
return rfind( str, sub, start, end );
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string expandtabs( const std::string & str, int tabsize )
{
std::string s( str );
std::string::size_type len = str.size(), i = 0;
int offset = 0;
int j = 0;
for ( i = 0; i < len; ++i )
{
if ( str[i] == '\t' )
{
if ( tabsize > 0 )
{
int fillsize = tabsize - (j % tabsize);
j += fillsize;
s.replace( i + offset, 1, std::string( fillsize, ' ' ));
offset += fillsize - 1;
}
else
{
s.replace( i + offset, 1, empty_string );
offset -= 1;
}
}
else
{
j++;
if (str[i] == '\n' || str[i] == '\r')
{
j = 0;
}
}
}
return s;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
int count( const std::string & str, const std::string & substr, int start, int end )
{
int nummatches = 0;
int cursor = start;
while ( 1 )
{
cursor = find( str, substr, cursor, end );
if ( cursor < 0 ) break;
cursor += (int) substr.size();
nummatches += 1;
}
return nummatches;
}
//////////////////////////////////////////////////////////////////////////////////////////////
///
///
std::string replace( const std::string & str, const std::string & oldstr, const std::string & newstr, int count )
{
int sofar = 0;
int cursor = 0;
std::string s( str );
std::string::size_type oldlen = oldstr.size(), newlen = newstr.size();
cursor = find( s, oldstr, cursor );
while ( cursor != -1 && cursor <= (int)s.size() )
{
if ( count > -1 && sofar >= count )
{
break;
}
s.replace( cursor, oldlen, newstr );
cursor += (int) newlen;
if ( oldlen != 0)
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