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86a566a27d
lyx_mirror/boost/libs/regex/src/c_regex_traits.cpp
Lars Gullik Bjønnes 86a566a27d add the boost regex sources and create the libboostregex lib 
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@4202 a592a061-630c-0410-9148-cb99ea01b6c8
2002-05-24 12:53:12 +00:00

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/*
*
* Copyright (c) 1998-2002
* Dr John Maddock
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Dr John Maddock makes no representations
* about the suitability of this software for any purpose.
* It is provided "as is" without express or implied warranty.
*
*/
/*
* LOCATION: see http://www.boost.org for most recent version.
* FILE c_regex_traits.cpp
* VERSION see <boost/version.hpp>
* DESCRIPTION: Implements the c_regex_traits<charT> traits class
*/
#define BOOST_REGEX_SOURCE
#include <clocale>
#include <cstdio>
#include <list>
#include <cctype>
#include <cstdio>
#include <boost/cregex.hpp>
#include <boost/regex/regex_traits.hpp>
#include <boost/regex/detail/regex_synch.hpp>
#include <boost/regex/detail/regex_cstring.hpp>
#include <boost/scoped_array.hpp>
#include "primary_transform.hpp"
#if defined(BOOST_HAS_NL_TYPES_H)
#include <nl_types.h>
#endif
// Fixes a very strange bug in Comeau 4.2.45.2 that would otherwise result in
// an instantiation loop
#if defined(__COMO__) && __COMO_VERSION__ <= 4245
void c_regex_adopted_no_longer_needed_loop_shutter_upper() { }
#endif
namespace{
//
// character classes:
//
boost::uint_fast32_t re_char_class_id[] = {
boost::re_detail::c_traits_base::char_class_alnum,
boost::re_detail::c_traits_base::char_class_alpha,
boost::re_detail::c_traits_base::char_class_cntrl,
boost::re_detail::c_traits_base::char_class_digit,
boost::re_detail::c_traits_base::char_class_graph,
boost::re_detail::c_traits_base::char_class_lower,
boost::re_detail::c_traits_base::char_class_print,
boost::re_detail::c_traits_base::char_class_punct,
boost::re_detail::c_traits_base::char_class_space,
boost::re_detail::c_traits_base::char_class_upper,
boost::re_detail::c_traits_base::char_class_xdigit,
boost::re_detail::c_traits_base::char_class_blank,
boost::re_detail::c_traits_base::char_class_word,
boost::re_detail::c_traits_base::char_class_unicode,
};
const char* re_char_class_names[] = {
"alnum",
"alpha",
"cntrl",
"digit",
"graph",
"lower",
"print",
"punct",
"space",
"upper",
"xdigit",
"blank",
"word",
"unicode",
};
std::string* re_cls_name;
std::string* pclasses;
unsigned int classes_count = 0;
const unsigned int re_classes_max = 14;
//
// collate names:
struct collate_name_t
{
std::string name;
std::string value;
collate_name_t(const char* p1, const char* p2, const char* p3, const char* p4)
: name(p1, p2), value(p3, p4) {}
};
std::string* re_coll_name;
std::list<collate_name_t>* pcoll_names;
unsigned int collate_count = 0;
//
// message handling:
#ifndef BOOST_RE_MESSAGE_BASE
#define BOOST_RE_MESSAGE_BASE 0
#endif
#if defined(BOOST_HAS_NL_TYPES_H)
nl_catd message_cat = (nl_catd)-1;
#endif
unsigned int message_count = 0;
std::string* mess_locale;
BOOST_REGEX_DECL char* re_custom_error_messages[] = {
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
0,
};
#if !defined(LC_MESSAGES)
#define LC_MESSAGES LC_CTYPE
#endif
char re_zero;
char re_ten;
unsigned int entry_count = 0;
std::string* ctype_name;
std::string* collate_name;
enum syntax_map_size
{
map_size = UCHAR_MAX + 1
};
#ifndef BOOST_NO_WREGEX
BOOST_REGEX_DECL wchar_t re_zero_w;
BOOST_REGEX_DECL wchar_t re_ten_w;
unsigned int nlsw_count = 0;
std::string* wlocale_name = 0;
struct syntax_map_t
{
wchar_t c;
unsigned int type;
};
std::list<syntax_map_t>* syntax;
#endif
std::size_t BOOST_REGEX_CALL _re_get_message(char* buf, std::size_t len, std::size_t id);
template <class charT>
std::size_t BOOST_REGEX_CALL re_get_message(charT* buf, std::size_t len, std::size_t id)
{
std::size_t size = _re_get_message(static_cast<char*>(0), 0, id);
if(len < size)
return size;
boost::scoped_array<char> cb(new char[size]);
_re_get_message(cb.get(), size, id);
size = boost::c_regex_traits<wchar_t>::strwiden(buf, len, cb.get());
return size;
}
inline std::size_t BOOST_REGEX_CALL re_get_message(char* buf, std::size_t len, std::size_t id)
{
return _re_get_message(buf, len, id);
}
void BOOST_REGEX_CALL re_init_classes()
{
BOOST_RE_GUARD_STACK
if(classes_count == 0)
{
re_cls_name = new std::string("xxxxxxxx");
#ifndef BOOST_NO_EXCEPTIONS
try{
#endif
pclasses = new std::string[re_classes_max];
BOOST_REGEX_NOEH_ASSERT(pclasses)
#ifndef BOOST_NO_EXCEPTIONS
}
catch(...)
{
delete re_cls_name;
throw;
}
#endif
}
++classes_count;
}
void BOOST_REGEX_CALL re_free_classes()
{
BOOST_RE_GUARD_STACK
if(--classes_count == 0)
{
delete re_cls_name;
delete[] pclasses;
}
}
void BOOST_REGEX_CALL re_update_classes()
{
BOOST_RE_GUARD_STACK
if(*re_cls_name != std::setlocale(LC_CTYPE, 0))
{
*re_cls_name = std::setlocale(LC_CTYPE, 0);
char buf[256];
unsigned int i;
for(i = 0; i < re_classes_max; ++i)
{
re_get_message(buf, 256, i+300);
pclasses[i] = buf;
}
}
}
void BOOST_REGEX_CALL re_init_collate()
{
BOOST_RE_GUARD_STACK
if(collate_count == 0)
{
re_coll_name = new std::string("xxxxxxxx");
#ifndef BOOST_NO_EXCEPTIONS
try{
#endif
pcoll_names = new std::list<collate_name_t>();
BOOST_REGEX_NOEH_ASSERT(pcoll_names)
#ifndef BOOST_NO_EXCEPTIONS
}
catch(...)
{
delete re_coll_name;
throw;
}
#endif
}
++collate_count;
}
void BOOST_REGEX_CALL re_free_collate()
{
BOOST_RE_GUARD_STACK
if(--collate_count == 0)
{
delete re_coll_name;
delete pcoll_names;
}
}
void BOOST_REGEX_CALL re_update_collate()
{
BOOST_RE_GUARD_STACK
if(*re_coll_name != std::setlocale(LC_COLLATE, 0))
{
*re_coll_name = std::setlocale(LC_COLLATE, 0);
char buf[256];
unsigned int i = 400;
re_get_message(buf, 256, i);
while(*buf)
{
char* p1, *p2, *p3, *p4;;
p1 = buf;
while(*p1 && std::isspace((unsigned char)*p1))++p1;
p2 = p1;
while(*p2 && !std::isspace((unsigned char)*p2))++p2;
p3 = p2;
while(*p3 && std::isspace((unsigned char)*p3))++p3;
p4 = p3;
while(*p4 && !std::isspace((unsigned char)*p4))++p4;
pcoll_names->push_back(collate_name_t(p1, p2, p3, p4));
++i;
re_get_message(buf, 256, i);
}
}
}
std::size_t BOOST_REGEX_CALL _re_get_message(char* buf, std::size_t len, std::size_t id)
{
BOOST_RE_GUARD_STACK
// get the customised message if any:
#if defined(BOOST_HAS_NL_TYPES_H)
if(message_cat != (nl_catd)-1)
{
const char* m = catgets(message_cat, 0, id, 0);
if(m)
{
std::size_t size = std::strlen(m) + 1;
if(size > len)
return size;
std::strcpy(buf, m);
return size;
}
}
#endif
//
// now get the default message if any:
return boost::re_detail::re_get_default_message(buf, len, id);
}
void BOOST_REGEX_CALL re_message_init()
{
BOOST_RE_GUARD_STACK
if(message_count == 0)
{
mess_locale = new std::string("xxxxxxxxxxxxxxxx");
}
++message_count;
}
void BOOST_REGEX_CALL re_message_update()
{
BOOST_RE_GUARD_STACK
//
// called whenever the global locale changes:
//
std::string l(std::setlocale(LC_MESSAGES, 0));
if(*mess_locale != l)
{
*mess_locale = l;
#if defined(BOOST_HAS_NL_TYPES_H)
if(message_cat != (nl_catd)-1)
{
catclose(message_cat);
message_cat = (nl_catd)-1;
}
if(*boost::re_detail::c_traits_base::get_catalogue())
{
message_cat = catopen(boost::re_detail::c_traits_base::get_catalogue(), 0);
#ifndef BOOST_NO_EXCEPTIONS
if(message_cat == (nl_catd)-1)
{
std::string m("Unable to open message catalog: ");
throw std::runtime_error(m + boost::re_detail::c_traits_base::get_catalogue());
}
#else
BOOST_REGEX_NOEH_ASSERT(message_cat != (nl_catd)-1);
#endif
}
#endif
for(int i = 0; i < boost::REG_E_UNKNOWN; ++i)
{
if(re_custom_error_messages[i])
{
boost::re_detail::re_strfree(re_custom_error_messages[i]);
re_custom_error_messages[i] = 0;
}
}
}
}
void BOOST_REGEX_CALL re_message_free()
{
BOOST_RE_GUARD_STACK
--message_count;
if(message_count == 0)
{
#if defined(BOOST_HAS_NL_TYPES_H)
if(message_cat != (nl_catd)-1)
catclose(message_cat);
#endif
delete mess_locale;
for(int i = 0; i < boost::REG_E_UNKNOWN; ++i)
{
if(re_custom_error_messages[i])
{
boost::re_detail::re_strfree(re_custom_error_messages[i]);
re_custom_error_messages[i] = 0;
}
}
}
}
const char* BOOST_REGEX_CALL re_get_error_str(unsigned int id)
{
BOOST_RE_GUARD_STACK
#ifdef BOOST_HAS_THREADS
boost::re_detail::cs_guard g(*boost::re_detail::p_re_lock);
#endif
if(re_custom_error_messages[id] == 0)
{
char buf[256];
_re_get_message(buf, 256, id + 200);
if(*buf)
{
re_custom_error_messages[id] = boost::re_detail::re_strdup(buf);
return re_custom_error_messages[id];
}
return boost::re_detail::re_default_error_messages[id];
}
return re_custom_error_messages[id];
}
} // namespace
namespace boost{
namespace re_detail{
char c_traits_base::regex_message_catalogue[BOOST_REGEX_MAX_PATH] = {0};
std::string BOOST_REGEX_CALL c_traits_base::error_string(unsigned id)
{
return re_get_error_str(id);
}
void BOOST_REGEX_CALL c_traits_base::do_update_collate()
{
BOOST_RE_GUARD_STACK
re_update_collate();
std::string s;
const char* p = "zero";
if(c_regex_traits<char>::lookup_collatename(s, p, p+4))
{
jm_assert(s.size() == 1);
re_zero = *s.c_str();
}
else
re_zero = '0';
p = "ten";
if(c_regex_traits<char>::lookup_collatename(s, p, p+3))
{
jm_assert(s.size() == 1);
re_ten = *s.c_str();
}
else
re_ten = 'a';
}
void BOOST_REGEX_CALL c_traits_base::do_update_ctype()
{
BOOST_RE_GUARD_STACK
// start by updating the syntax map:
unsigned int i;
char buf[map_size+2];
std::memset(syntax_map, syntax_char, map_size);
for(i = 1; i < syntax_max; ++i)
{
char* ptr = buf;
re_get_message(static_cast<char*>(buf), map_size, i+100);
for(; *ptr; ++ptr)
{
syntax_map[(unsigned char)*ptr] = (unsigned char)i;
}
}
// now update the character class map,
// and lower case map:
std::memset(class_map, 0, map_size);
for(i = 0; i < map_size; ++i)
{
if(std::isalpha(i))
class_map[i] |= char_class_alpha;
if(std::iscntrl(i))
class_map[i] |= char_class_cntrl;
if(std::isdigit(i))
class_map[i] |= char_class_digit;
if(std::islower(i))
class_map[i] |= char_class_lower;
if(std::isupper(i))
class_map[i] |= char_class_upper;
if(std::ispunct(i))
class_map[i] |= char_class_punct;
if(std::isspace(i))
class_map[i] |= char_class_space;
if(std::isxdigit(i))
class_map[i] |= char_class_xdigit;
}
class_map['_'] |= char_class_underscore;
class_map[' '] |= char_class_blank;
class_map['\t'] |= char_class_blank;
for(i = 0; i < map_size; ++i)
{
lower_case_map[i] = (char)std::tolower(i);
}
re_update_classes();
}
boost::uint_fast32_t BOOST_REGEX_CALL c_traits_base::do_lookup_class(const char* p)
{
BOOST_RE_GUARD_STACK
unsigned int i;
for(i = 0; i < re_classes_max; ++i)
{
if(pclasses[i] == p)
{
return re_char_class_id[i];
}
}
for(i = 0; i < re_classes_max; ++i)
{
if(std::strcmp(re_char_class_names[i], p) == 0)
{
return re_char_class_id[i];
}
}
return 0;
}
bool BOOST_REGEX_CALL c_traits_base::do_lookup_collate(std::string& buf, const char* p)
{
BOOST_RE_GUARD_STACK
std::list<collate_name_t>::iterator first, last;
first = pcoll_names->begin();
last = pcoll_names->end();
while(first != last)
{
if((*first).name == p)
{
buf = (*first).value;
return true;
}
++first;
}
bool result = re_detail::re_lookup_def_collate_name(buf, p);
if((result == 0) && (std::strlen(p) == 1))
{
result = true;
buf = *p;
}
return result;
}
std::string BOOST_REGEX_CALL c_traits_base::set_message_catalogue(const std::string& l)
{
if(sizeof(regex_message_catalogue) <= l.size())
return l;
std::string old(regex_message_catalogue);
std::strcpy(regex_message_catalogue, l.c_str());
return old;
}
unsigned char c_traits_base::syntax_map[map_size];
unsigned short c_traits_base::class_map[map_size];
char c_traits_base::lower_case_map[map_size];
} // namespace re_detail
#ifndef BOOST_NO_WREGEX
bool BOOST_REGEX_CALL c_regex_traits<wchar_t>::lookup_collatename(std::basic_string<wchar_t>& out, const wchar_t* first, const wchar_t* last)
{
BOOST_RE_GUARD_STACK
std::basic_string<wchar_t> s(first, last);
std::size_t len = strnarrow(static_cast<char*>(0), 0, s.c_str());
scoped_array<char> buf(new char[len]);
strnarrow(buf.get(), len, s.c_str());
std::string t_out;
bool result = base_type::do_lookup_collate(t_out, buf.get());
if(t_out.size() == 0) result = false;
if(result)
{
if(t_out[0])
{
len = strwiden(static_cast<wchar_t*>(0), 0, t_out.c_str());
scoped_array<wchar_t> wb(new wchar_t[len]);
strwiden(wb.get(), len, t_out.c_str());
out = wb.get();
}
else
out.append(1, (wchar_t)0);
}
return result;
}
#endif
c_regex_traits<char> c_regex_traits<char>::i;
void BOOST_REGEX_CALL c_regex_traits<char>::init()
{
BOOST_RE_GUARD_STACK
#ifdef BOOST_HAS_THREADS
re_detail::re_init_threads();
re_detail::cs_guard g(*re_detail::p_re_lock);
#endif
// just keep track of entry_count
if(entry_count == 0)
{
ctype_name = new std::string("xxxxxxxxxxxxxxxx");
#ifndef BOOST_NO_EXCEPTIONS
try{
#endif
collate_name = new std::string("xxxxxxxxxxxxxxxx");
BOOST_REGEX_NOEH_ASSERT(collate_name)
#ifndef BOOST_NO_EXCEPTIONS
}
catch(...)
{
delete ctype_name;
throw;
}
#endif
}
re_message_init();
re_init_classes();
re_init_collate();
++entry_count;
}
void BOOST_REGEX_CALL c_regex_traits<char>::update()
{
BOOST_RE_GUARD_STACK
#ifdef BOOST_HAS_THREADS
re_detail::cs_guard g(*re_detail::p_re_lock);
#endif
re_message_update();
if(*collate_name != std::setlocale(LC_COLLATE, 0))
{
do_update_collate();
*collate_name = std::setlocale(LC_COLLATE, 0);
}
if(*ctype_name != std::setlocale(LC_CTYPE, 0))
{
do_update_ctype();
*ctype_name = std::setlocale(LC_CTYPE, 0);
}
sort_type = re_detail::find_sort_syntax(&i, &sort_delim);
}
void BOOST_REGEX_CALL c_regex_traits<char>::m_free()
{
BOOST_RE_GUARD_STACK
#ifdef BOOST_HAS_THREADS
re_detail::cs_guard g(*re_detail::p_re_lock);
#endif
re_message_free();
re_free_classes();
re_free_collate();
--entry_count;
if(entry_count == 0)
{
delete ctype_name;
delete collate_name;
}
#ifdef BOOST_HAS_THREADS
g.acquire(false);
re_detail::re_free_threads();
#endif
}
void BOOST_REGEX_CALL c_regex_traits<char>::transform(std::string& out, const std::string& in)
{
BOOST_RE_GUARD_STACK
std::size_t n = std::strxfrm(0, in.c_str(), 0);
if(n == (std::size_t)(-1))
{
out = in;
return;
}
scoped_array<char> buf(new char[n+1]);
n = std::strxfrm(buf.get(), in.c_str(), n+1);
if(n == (std::size_t)(-1))
{
out = in;
return;
}
out = buf.get();
}
void BOOST_REGEX_CALL c_regex_traits<char>::transform_primary(std::string& out, const std::string& in)
{
transform(out, in);
switch(sort_type)
{
case re_detail::sort_C:
case re_detail::sort_unknown:
break;
case re_detail::sort_fixed:
out.erase((int)sort_delim);
break;
case re_detail::sort_delim:
for(unsigned int i = 0; i < out.size(); ++i)
{
if((out[i] == sort_delim) && (i+1 < out.size()))
{
out.erase(i+1);
break;
}
}
}
}
unsigned c_regex_traits<char>::sort_type;
char c_regex_traits<char>::sort_delim;
int BOOST_REGEX_CALL c_regex_traits<char>::toi(char c)
{
if(is_class(c, char_class_digit))
return c - re_zero;
if(is_class(c, char_class_xdigit))
return 10 + translate(c, true) - translate(re_ten, true);
return -1; // error!!
}
int BOOST_REGEX_CALL c_regex_traits<char>::toi(const char*& first, const char* last, int radix)
{
unsigned int maxval;
if(radix < 0)
{
// if radix is less than zero, then restrict
// return value to charT. NB assumes sizeof(charT) <= sizeof(int)
radix *= -1;
maxval = 1u << (sizeof(*first) * CHAR_BIT - 1);
maxval /= radix;
maxval *= 2;
maxval -= 1;
}
else
{
maxval = (unsigned int)-1;
maxval /= radix;
}
unsigned int result = 0;
unsigned int type = (radix > 10) ? char_class_xdigit : char_class_digit;
while((first != last) && is_class(*first, type) && (result <= maxval))
{
result *= radix;
result += toi(*first);
++first;
}
return result;
}
#ifndef BOOST_NO_WREGEX
unsigned int BOOST_REGEX_CALL c_regex_traits<wchar_t>::syntax_type(size_type c)
{
BOOST_RE_GUARD_STACK
std::list<syntax_map_t>::const_iterator first, last;
first = syntax->begin();
last = syntax->end();
while(first != last)
{
if((uchar_type)(*first).c == c)
return (*first).type;
++first;
}
return 0;
}
void BOOST_REGEX_CALL c_regex_traits<wchar_t>::init()
{
BOOST_RE_GUARD_STACK
re_detail::re_init_threads();
#ifdef BOOST_HAS_THREADS
re_detail::cs_guard g(*re_detail::p_re_lock);
#endif
re_message_init();
re_init_classes();
re_init_collate();
if(nlsw_count == 0)
{
wlocale_name = new std::string("xxxxxxxxxxxxxxxx");
#ifndef BOOST_NO_EXCEPTIONS
try{
#endif
syntax = new std::list<syntax_map_t>();
BOOST_REGEX_NOEH_ASSERT(syntax)
#ifndef BOOST_NO_EXCEPTIONS
}
catch(...)
{
delete wlocale_name;
throw;
}
#endif
}
++nlsw_count;
}
bool BOOST_REGEX_CALL c_regex_traits<wchar_t>::do_lookup_collate(std::basic_string<wchar_t>& out, const wchar_t* first, const wchar_t* last)
{
BOOST_RE_GUARD_STACK
std::basic_string<wchar_t> s(first, last);
std::size_t len = strnarrow(static_cast<char*>(0), 0, s.c_str());
scoped_array<char> buf(new char[len]);
strnarrow(buf.get(), len, s.c_str());
std::string t_out;
bool result = base_type::do_lookup_collate(t_out, buf.get());
if(result)
{
len = strwiden(static_cast<wchar_t*>(0), 0, t_out.c_str());
scoped_array<wchar_t> wb(new wchar_t[len]);
strwiden(wb.get(), len, t_out.c_str());
out = wb.get();
}
return result;
}
void BOOST_REGEX_CALL c_regex_traits<wchar_t>::update()
{
BOOST_RE_GUARD_STACK
#ifdef BOOST_HAS_THREADS
re_detail::cs_guard g(*re_detail::p_re_lock);
#endif
re_message_update();
re_update_classes();
re_update_collate();
std::string l(std::setlocale(LC_CTYPE, 0));
if(*wlocale_name != l)
{
*wlocale_name = l;
std::basic_string<wchar_t> s;
const wchar_t* p = L"zero";
if(do_lookup_collate(s, p, p+4))
{
jm_assert(s.size() == 1);
re_zero_w = *s.c_str();
}
else
re_zero_w = L'0';
p = L"ten";
if(do_lookup_collate(s, p, p+3))
{
jm_assert(s.size() == 1);
re_ten_w = *s.c_str();
}
else
re_ten_w = L'a';
unsigned int i;
wchar_t buf[256];
syntax_map_t sm;
syntax->clear();
for(i = 1; i < syntax_max; ++i)
{
wchar_t* ptr = buf;
re_get_message(static_cast<wchar_t*>(buf), 256, i+100);
for(; *ptr; ++ptr)
{
sm.c = *ptr;
sm.type = i;
syntax->push_back(sm);
}
}
sort_type = re_detail::find_sort_syntax(&init_, &sort_delim);
}
}
void BOOST_REGEX_CALL c_regex_traits<wchar_t>::m_free()
{
BOOST_RE_GUARD_STACK
#ifdef BOOST_HAS_THREADS
re_detail::cs_guard g(*re_detail::p_re_lock);
#endif
--nlsw_count;
re_message_free();
re_free_classes();
re_free_collate();
if(nlsw_count == 0)
{
// cleanup:
delete wlocale_name;
delete syntax;
}
#ifdef BOOST_HAS_THREADS
g.acquire(false);
re_detail::re_free_threads();
#endif
}
bool BOOST_REGEX_CALL c_regex_traits<wchar_t>::do_iswclass(wchar_t c, boost::uint_fast32_t f)
{
BOOST_RE_GUARD_STACK
if((c & ~0xFF) == 0)
return BOOST_REGEX_MAKE_BOOL(re_detail::wide_unicode_classes[(uchar_type)c] & f);
if((f & char_class_alpha) && std::iswalpha(c))
return true;
if((f & char_class_cntrl) && std::iswcntrl(c))
return true;
if((f & char_class_digit) && std::iswdigit(c))
return true;
if((f & char_class_lower) && std::iswlower(c))
return true;
if((f & char_class_punct) && std::iswpunct(c))
return true;
if((f & char_class_space) && std::iswspace(c))
return true;
if((f & char_class_upper) && std::iswupper(c))
return true;
if((f & char_class_xdigit) && std::iswxdigit(c))
return true;
if(f & char_class_unicode)
return true;
return false;
}
void BOOST_REGEX_CALL c_regex_traits<wchar_t>::transform(std::basic_string<wchar_t>& out, const std::basic_string<wchar_t>& in)
{
BOOST_RE_GUARD_STACK
#ifndef BOOST_MSVC
std::size_t n = std::wcsxfrm(0, in.c_str(), 0);
#else
// broken wcsxfrm under VC6 doesn't check size of
// output buffer, we have no choice but to guess!
std::size_t n = 100 * in.size();
#endif
if((n == (std::size_t)(-1)) || (n == 0))
{
out = in;
return;
}
scoped_array<wchar_t> buf(new wchar_t[n+1]);
n = std::wcsxfrm(buf.get(), in.c_str(), n+1);
if(n == (std::size_t)(-1))
{
out = in;
return;
}
out = buf.get();
}
void BOOST_REGEX_CALL c_regex_traits<wchar_t>::transform_primary(std::basic_string<wchar_t>& out, const std::basic_string<wchar_t>& in)
{
transform(out, in);
switch(sort_type)
{
case re_detail::sort_C:
case re_detail::sort_unknown:
break;
case re_detail::sort_fixed:
if((unsigned)sort_delim < out.size())
out.erase((int)sort_delim);
break;
case re_detail::sort_delim:
for(unsigned int i = 0; i < out.size(); ++i)
{
if((out[i] == sort_delim) && (i+1 < out.size()))
{
out.erase(i+1);
break;
}
}
}
}
unsigned c_regex_traits<wchar_t>::sort_type;
wchar_t c_regex_traits<wchar_t>::sort_delim;
int BOOST_REGEX_CALL c_regex_traits<wchar_t>::toi(wchar_t c)
{
if(is_class(c, char_class_digit))
return c - re_zero_w;
if(is_class(c, char_class_xdigit))
return 10 + translate(c, true) - translate(re_ten_w, true);
return -1; // error!!
}
int BOOST_REGEX_CALL c_regex_traits<wchar_t>::toi(const wchar_t*& first, const wchar_t* last, int radix)
{
unsigned int maxval;
if(radix < 0)
{
// if radix is less than zero, then restrict
// return value to charT. NB assumes sizeof(charT) <= sizeof(int)
radix *= -1;
maxval = 1u << (sizeof(*first) * CHAR_BIT - 1);
maxval /= radix;
maxval *= 2;
maxval -= 1;
}
else
{
maxval = (unsigned int)-1;
maxval /= radix;
}
unsigned int result = 0;
unsigned int type = (radix > 10) ? char_class_xdigit : char_class_digit;
while((first != last) && is_class(*first, type) && (result <= maxval))
{
result *= radix;
result += toi(*first);
++first;
}
return result;
}
boost::uint_fast32_t BOOST_REGEX_CALL c_regex_traits<wchar_t>::lookup_classname(const wchar_t* first, const wchar_t* last)
{
std::basic_string<wchar_t> s(first, last);
std::size_t len = strnarrow(static_cast<char*>(0), 0, s.c_str());
scoped_array<char> buf(new char[len]);
strnarrow(buf.get(), len, s.c_str());
boost::uint_fast32_t result = do_lookup_class(buf.get());
return result;
}
c_regex_traits<wchar_t> c_regex_traits<wchar_t>::init_;
std::size_t BOOST_REGEX_CALL c_regex_traits<wchar_t>::strnarrow(char *s1, std::size_t len, const wchar_t *s2)
{
BOOST_RE_GUARD_STACK
std::size_t size = std::wcslen(s2) + 1;
if(size > len)
return size;
return std::wcstombs(s1, s2, len);
}
std::size_t BOOST_REGEX_CALL c_regex_traits<wchar_t>::strwiden(wchar_t *s1, std::size_t len, const char *s2)
{
BOOST_RE_GUARD_STACK
std::size_t size = std::strlen(s2) + 1;
if(size > len)
return size;
size = std::mbstowcs(s1, s2, len);
s1[size] = 0;
return size + 1;
}
#endif // BOOST_NO_WREGEX
} // namespace boost
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