297 lines
7.0 KiB
C++
297 lines
7.0 KiB
C++
/*
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*
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* Copyright (c) 1998-2002
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* John Maddock
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*
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* Use, modification and distribution are subject to the
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* Boost Software License, Version 1.0. (See accompanying file
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* LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*
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*/
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/*
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* LOCATION: see http://www.boost.org for most recent version.
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* FILE: posix_api.cpp
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* VERSION: see <boost/version.hpp>
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* DESCRIPTION: Implements the Posix API wrappers.
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*/
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#define BOOST_REGEX_SOURCE
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#include <boost/config.hpp>
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#include <cstdio>
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#include <boost/regex.hpp>
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#include <boost/cregex.hpp>
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#if defined(BOOST_NO_STDC_NAMESPACE)
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namespace std{
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using ::sprintf;
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using ::strcpy;
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using ::strcmp;
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}
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#endif
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namespace boost{
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namespace{
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unsigned int magic_value = 25631;
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const char* names[] = {
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"REG_NOERROR",
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"REG_NOMATCH",
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"REG_BADPAT",
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"REG_ECOLLATE",
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"REG_ECTYPE",
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"REG_EESCAPE",
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"REG_ESUBREG",
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"REG_EBRACK",
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"REG_EPAREN",
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"REG_EBRACE",
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"REG_BADBR",
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"REG_ERANGE",
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"REG_ESPACE",
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"REG_BADRPT",
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"REG_EEND",
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"REG_ESIZE",
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"REG_ERPAREN",
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"REG_EMPTY",
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"REG_ECOMPLEXITY",
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"REG_ESTACK",
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"REG_E_PERL",
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"REG_E_UNKNOWN",
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};
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} // namespace
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typedef boost::basic_regex<char, c_regex_traits<char> > c_regex_type;
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BOOST_REGEX_DECL int BOOST_REGEX_CCALL regcompA(regex_tA* expression, const char* ptr, int f)
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{
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if(expression->re_magic != magic_value)
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{
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expression->guts = 0;
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#ifndef BOOST_NO_EXCEPTIONS
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try{
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#endif
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expression->guts = new c_regex_type();
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#ifndef BOOST_NO_EXCEPTIONS
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} catch(...)
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{
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return REG_ESPACE;
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}
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#else
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if(0 == expression->guts)
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return REG_E_MEMORY;
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#endif
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}
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// set default flags:
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boost::uint_fast32_t flags = (f & REG_PERLEX) ? 0 : ((f & REG_EXTENDED) ? regex::extended : regex::basic);
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expression->eflags = (f & REG_NEWLINE) ? match_not_dot_newline : match_default;
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// and translate those that are actually set:
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if(f & REG_NOCOLLATE)
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{
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flags |= regex::nocollate;
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#ifndef BOOST_REGEX_V3
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flags &= ~regex::collate;
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#endif
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}
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if(f & REG_NOSUB)
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{
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//expression->eflags |= match_any;
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flags |= regex::nosubs;
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}
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if(f & REG_NOSPEC)
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flags |= regex::literal;
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if(f & REG_ICASE)
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flags |= regex::icase;
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if(f & REG_ESCAPE_IN_LISTS)
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flags &= ~regex::no_escape_in_lists;
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if(f & REG_NEWLINE_ALT)
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flags |= regex::newline_alt;
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const char* p2;
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if(f & REG_PEND)
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p2 = expression->re_endp;
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else p2 = ptr + std::strlen(ptr);
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int result;
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#ifndef BOOST_NO_EXCEPTIONS
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try{
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#endif
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expression->re_magic = magic_value;
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static_cast<c_regex_type*>(expression->guts)->set_expression(ptr, p2, flags);
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expression->re_nsub = static_cast<c_regex_type*>(expression->guts)->mark_count() - 1;
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result = static_cast<c_regex_type*>(expression->guts)->error_code();
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#ifndef BOOST_NO_EXCEPTIONS
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}
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catch(const boost::regex_error& be)
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{
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result = be.code();
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}
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catch(...)
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{
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result = REG_E_UNKNOWN;
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}
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#endif
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if(result)
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regfreeA(expression);
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return result;
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}
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BOOST_REGEX_DECL regsize_t BOOST_REGEX_CCALL regerrorA(int code, const regex_tA* e, char* buf, regsize_t buf_size)
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{
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std::size_t result = 0;
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if(code & REG_ITOA)
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{
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code &= ~REG_ITOA;
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if(code <= (int)REG_E_UNKNOWN)
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{
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result = std::strlen(names[code]) + 1;
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if(buf_size >= result)
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re_detail::strcpy_s(buf, buf_size, names[code]);
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return result;
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}
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return result;
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}
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if(code == REG_ATOI)
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{
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char localbuf[5];
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if(e == 0)
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return 0;
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for(int i = 0; i <= (int)REG_E_UNKNOWN; ++i)
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{
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if(std::strcmp(e->re_endp, names[i]) == 0)
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{
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//
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// We're converting an integer i to a string, and since i <= REG_E_UNKNOWN
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// a five character string is *always* large enough:
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//
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#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400) && !defined(_WIN32_WCE) && !defined(UNDER_CE)
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int r = (::sprintf_s)(localbuf, 5, "%d", i);
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#else
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int r = (std::sprintf)(localbuf, "%d", i);
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#endif
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if(r < 0)
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return 0; // sprintf failed
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if(std::strlen(localbuf) < buf_size)
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re_detail::strcpy_s(buf, buf_size, localbuf);
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return std::strlen(localbuf) + 1;
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}
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}
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#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400) && !defined(_WIN32_WCE) && !defined(UNDER_CE)
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(::sprintf_s)(localbuf, 5, "%d", 0);
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#else
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(std::sprintf)(localbuf, "%d", 0);
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#endif
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if(std::strlen(localbuf) < buf_size)
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re_detail::strcpy_s(buf, buf_size, localbuf);
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return std::strlen(localbuf) + 1;
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}
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if(code <= (int)REG_E_UNKNOWN)
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{
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std::string p;
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if((e) && (e->re_magic == magic_value))
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p = static_cast<c_regex_type*>(e->guts)->get_traits().error_string(static_cast< ::boost::regex_constants::error_type>(code));
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else
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{
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p = re_detail::get_default_error_string(static_cast< ::boost::regex_constants::error_type>(code));
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}
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std::size_t len = p.size();
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if(len < buf_size)
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{
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re_detail::strcpy_s(buf, buf_size, p.c_str());
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}
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return len + 1;
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}
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if(buf_size)
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*buf = 0;
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return 0;
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}
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BOOST_REGEX_DECL int BOOST_REGEX_CCALL regexecA(const regex_tA* expression, const char* buf, regsize_t n, regmatch_t* array, int eflags)
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{
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#ifdef BOOST_MSVC
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#pragma warning(push)
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#pragma warning(disable:4267)
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#endif
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bool result = false;
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match_flag_type flags = match_default | expression->eflags;
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const char* end;
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const char* start;
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cmatch m;
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if(eflags & REG_NOTBOL)
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flags |= match_not_bol;
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if(eflags & REG_NOTEOL)
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flags |= match_not_eol;
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if(eflags & REG_STARTEND)
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{
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start = buf + array[0].rm_so;
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end = buf + array[0].rm_eo;
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}
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else
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{
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start = buf;
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end = buf + std::strlen(buf);
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}
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#ifndef BOOST_NO_EXCEPTIONS
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try{
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#endif
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if(expression->re_magic == magic_value)
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{
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result = regex_search(start, end, m, *static_cast<c_regex_type*>(expression->guts), flags);
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}
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else
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return result;
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#ifndef BOOST_NO_EXCEPTIONS
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} catch(...)
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{
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return REG_E_UNKNOWN;
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}
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#endif
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if(result)
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{
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// extract what matched:
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std::size_t i;
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for(i = 0; (i < n) && (i < expression->re_nsub + 1); ++i)
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{
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array[i].rm_so = (m[i].matched == false) ? -1 : (m[i].first - buf);
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array[i].rm_eo = (m[i].matched == false) ? -1 : (m[i].second - buf);
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}
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// and set anything else to -1:
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for(i = expression->re_nsub + 1; i < n; ++i)
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{
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array[i].rm_so = -1;
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array[i].rm_eo = -1;
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}
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return 0;
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}
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return REG_NOMATCH;
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#ifdef BOOST_MSVC
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#pragma warning(pop)
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#endif
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}
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BOOST_REGEX_DECL void BOOST_REGEX_CCALL regfreeA(regex_tA* expression)
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{
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if(expression->re_magic == magic_value)
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{
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delete static_cast<c_regex_type*>(expression->guts);
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}
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expression->re_magic = 0;
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}
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} // namespace boost
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