lyx_mirror/src/support/lstrings.C
Lars Gullik Bjønnes 3674a8c003 LFUN_UNICODE_INSERT - unicode-insert
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15490 a592a061-630c-0410-9148-cb99ea01b6c8
2006-10-22 18:47:19 +00:00

990 lines
21 KiB
C

/**
* \file lstrings.C
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Lars Gullik Bjønnes
* \author Jean-Marc Lasgouttes
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "support/lstrings.h"
#include "support/lyxlib.h"
#include "support/convert.h"
#include "debug.h"
#include <boost/tokenizer.hpp>
#include <boost/assert.hpp>
#ifndef I_AM_NOT_AFRAID_OF_HEADER_LIBRARIES
#if USE_BOOST_FORMAT
#include <boost/format.hpp>
#endif
#endif
#include <cctype>
#include <cstdlib>
#include <algorithm>
#include <sstream>
using lyx::docstring;
using std::transform;
using std::string;
using std::vector;
#ifndef CXX_GLOBAL_CSTD
using std::isdigit;
using std::tolower;
using std::toupper;
#endif
namespace lyx {
namespace support {
int compare_no_case(string const & s, string const & s2)
{
string::const_iterator p = s.begin();
string::const_iterator p2 = s2.begin();
while (p != s.end() && p2 != s2.end()) {
int const lc1 = tolower(*p);
int const lc2 = tolower(*p2);
if (lc1 != lc2)
return (lc1 < lc2) ? -1 : 1;
++p;
++p2;
}
if (s.size() == s2.size())
return 0;
if (s.size() < s2.size())
return -1;
return 1;
}
int compare_no_case(docstring const & s, docstring const & s2)
{
docstring::const_iterator p = s.begin();
docstring::const_iterator p2 = s2.begin();
while (p != s.end() && p2 != s2.end()) {
int const lc1 = tolower(*p);
int const lc2 = tolower(*p2);
if (lc1 != lc2)
return (lc1 < lc2) ? -1 : 1;
++p;
++p2;
}
if (s.size() == s2.size())
return 0;
if (s.size() < s2.size())
return -1;
return 1;
}
namespace {
int ascii_tolower(int c) {
if (c >= 'A' && c <= 'Z')
return c - 'A' + 'a';
return c;
}
template<typename String> inline
int do_compare_ascii_no_case(String const & s, String const & s2)
{
typename String::const_iterator p = s.begin();
typename String::const_iterator p2 = s2.begin();
while (p != s.end() && p2 != s2.end()) {
int const lc1 = ascii_tolower(*p);
int const lc2 = ascii_tolower(*p2);
if (lc1 != lc2)
return (lc1 < lc2) ? -1 : 1;
++p;
++p2;
}
if (s.size() == s2.size())
return 0;
if (s.size() < s2.size())
return -1;
return 1;
}
}
int compare_ascii_no_case(string const & s, string const & s2)
{
return do_compare_ascii_no_case(s, s2);
}
int compare_ascii_no_case(docstring const & s, docstring const & s2)
{
return do_compare_ascii_no_case(s, s2);
}
int compare_no_case(string const & s, string const & s2, unsigned int len)
{
string::const_iterator p = s.begin();
string::const_iterator p2 = s2.begin();
unsigned int i = 0;
while (i < len && p != s.end() && p2 != s2.end()) {
int const lc1 = tolower(*p);
int const lc2 = tolower(*p2);
if (lc1 != lc2)
return (lc1 < lc2) ? -1 : 1;
++i;
++p;
++p2;
}
if (s.size() >= len && s2.size() >= len)
return 0;
if (s.size() < s2.size())
return -1;
return 1;
}
bool isStrInt(string const & str)
{
if (str.empty()) return false;
// Remove leading and trailing white space chars.
string const tmpstr = trim(str);
if (tmpstr.empty()) return false;
string::const_iterator cit = tmpstr.begin();
if ((*cit) == '-') ++cit;
string::const_iterator end = tmpstr.end();
for (; cit != end; ++cit) {
if (!isdigit((*cit))) return false;
}
return true;
}
bool isStrUnsignedInt(string const & str)
{
if (str.empty()) return false;
// Remove leading and trailing white space chars.
string const tmpstr = trim(str);
if (tmpstr.empty()) return false;
string::const_iterator cit = tmpstr.begin();
string::const_iterator end = tmpstr.end();
for (; cit != end; ++cit) {
if (!isdigit((*cit))) return false;
}
return true;
}
bool isStrDbl(string const & str)
{
if (str.empty()) return false;
// Remove leading and trailing white space chars.
string const tmpstr = trim(str);
if (tmpstr.empty()) return false;
// if (1 < tmpstr.count('.')) return false;
string::const_iterator cit = tmpstr.begin();
bool found_dot(false);
if ((*cit) == '-') ++cit;
string::const_iterator end = tmpstr.end();
for (; cit != end; ++cit) {
if (!isdigit((*cit))
&& '.' != (*cit)) {
return false;
}
if ('.' == (*cit)) {
if (found_dot) {
return false;
} else {
found_dot = true;
}
}
}
return true;
}
namespace {
inline
bool isHexChar(char_type c)
{
return c == '0' ||
c == '1' ||
c == '2' ||
c == '3' ||
c == '4' ||
c == '5' ||
c == '6' ||
c == '7' ||
c == '8' ||
c == '9' ||
c == 'a' || c == 'A' ||
c == 'b' || c == 'B' ||
c == 'c' || c == 'C' ||
c == 'd' || c == 'D' ||
c == 'e' || c == 'E' ||
c == 'f' || c == 'F';
}
} // anon namespace
bool isHex(docstring const & str)
{
int index = 0;
if (str.length() > 2 and str[0] == '0' &&
(str[1] == 'x' || str[1] == 'X'))
index = 2;
int const len = str.length();
for (; index < len; ++index) {
if (!isHexChar(str[index]))
return false;
}
return true;
}
int hexToInt(docstring const & str)
{
string s = to_ascii(str);
int h;
sscanf(s.c_str(), "%x", &h);
return h;
}
char lowercase(char c)
{
return char(tolower(c));
}
char uppercase(char c)
{
return char(toupper(c));
}
// FIXME for lowercase() and uppercase() function below:
// 1) std::tolower() and std::toupper() are templates that
// compile fine with char_type. With the test (c >= 256) we
// do not trust these function to do the right thing with
// unicode char.
// 2) these functions use the current locale, which is wrong
// if it is not latin1 based (latin1 is a subset of UCS4).
char_type lowercase(char_type c)
{
if (c >= 256)
return c;
return tolower(c);
}
char_type uppercase(char_type c)
{
if (c >= 256)
return c;
return toupper(c);
}
namespace {
// since we cannot use std::tolower and std::toupper directly in the
// calls to std::transform yet, we use these helper clases. (Lgb)
struct local_lowercase {
char operator()(char c) const {
return tolower(c);
}
};
struct local_uppercase {
char operator()(char c) const {
return toupper(c);
}
};
struct local_ascii_lowercase {
char operator()(char c) const {
return ascii_tolower(c);
}
};
} // end of anon namespace
string const lowercase(string const & a)
{
string tmp(a);
transform(tmp.begin(), tmp.end(), tmp.begin(), local_lowercase());
return tmp;
}
string const uppercase(string const & a)
{
string tmp(a);
transform(tmp.begin(), tmp.end(), tmp.begin(), local_uppercase());
return tmp;
}
string const ascii_lowercase(string const & a)
{
string tmp(a);
transform(tmp.begin(), tmp.end(), tmp.begin(),
local_ascii_lowercase());
return tmp;
}
bool prefixIs(string const & a, string const & pre)
{
string::size_type const prelen = pre.length();
string::size_type const alen = a.length();
if (prelen > alen || a.empty())
return false;
else {
#if defined(STD_STRING_IS_GOOD)
return a.compare(0, prelen, pre) == 0;
#else
return ::strncmp(a.c_str(), pre.c_str(), prelen) == 0;
#endif
}
}
bool prefixIs(docstring const & a, docstring const & pre)
{
docstring::size_type const prelen = pre.length();
docstring::size_type const alen = a.length();
if (prelen > alen || a.empty())
return false;
else
return a.compare(0, prelen, pre) == 0;
}
bool suffixIs(string const & a, char c)
{
if (a.empty()) return false;
return a[a.length() - 1] == c;
}
bool suffixIs(string const & a, string const & suf)
{
string::size_type const suflen = suf.length();
string::size_type const alen = a.length();
if (suflen > alen) {
return false;
} else {
#if !defined(USE_INCLUDED_STRING) && !defined(STD_STRING_IS_GOOD)
string tmp(a, alen - suflen);
return ::strncmp(tmp.c_str(), suf.c_str(), suflen) == 0;
#else
return a.compare(alen - suflen, suflen, suf) == 0;
#endif
}
}
bool containsOnly(string const & s, string const & cset)
{
return s.find_first_not_of(cset) == string::npos;
}
// ale970405+lasgoutt-970425
// rewritten to use new string (Lgb)
string const token(string const & a, char delim, int n)
{
if (a.empty()) return string();
string::size_type k = 0;
string::size_type i = 0;
// Find delimiter or end of string
for (; n--;)
if ((i = a.find(delim, i)) == string::npos)
break;
else
++i; // step delim
// i is now the n'th delim (or string::npos)
if (i == string::npos) return string();
k = a.find(delim, i);
// k is now the n'th + 1 delim (or string::npos)
return a.substr(i, k - i);
}
docstring const token(docstring const & a, char_type delim, int n)
{
if (a.empty()) return docstring();
string::size_type k = 0;
string::size_type i = 0;
// Find delimiter or end of string
for (; n--;)
if ((i = a.find(delim, i)) == docstring::npos)
break;
else
++i; // step delim
// i is now the n'th delim (or string::npos)
if (i == docstring::npos) return docstring();
k = a.find(delim, i);
// k is now the n'th + 1 delim (or string::npos)
return a.substr(i, k - i);
}
// this could probably be faster and/or cleaner, but it seems to work (JMarc)
// rewritten to use new string (Lgb)
int tokenPos(string const & a, char delim, string const & tok)
{
int i = 0;
string str(a);
string tmptok;
while (!str.empty()) {
str = split(str, tmptok, delim);
if (tok == tmptok)
return i;
++i;
}
return -1;
}
namespace {
/// Substitute all \a oldchar with \a newchar
template<typename Ch> inline
std::basic_string<Ch> const subst_char(std::basic_string<Ch> const & a,
Ch oldchar, Ch newchar)
{
typedef std::basic_string<Ch> String;
String tmp(a);
typename String::iterator lit = tmp.begin();
typename String::iterator end = tmp.end();
for (; lit != end; ++lit)
if ((*lit) == oldchar)
(*lit) = newchar;
return tmp;
}
/// substitutes all instances of \a oldstr with \a newstr
template<typename String> inline
String const subst_string(String const & a,
String const & oldstr, String const & newstr)
{
BOOST_ASSERT(!oldstr.empty());
String lstr = a;
typename String::size_type i = 0;
typename String::size_type const olen = oldstr.length();
while ((i = lstr.find(oldstr, i)) != string::npos) {
lstr.replace(i, olen, newstr);
i += newstr.length(); // We need to be sure that we dont
// use the same i over and over again.
}
return lstr;
}
}
string const subst(string const & a, char oldchar, char newchar)
{
return subst_char(a, oldchar, newchar);
}
docstring const subst(docstring const & a,
char_type oldchar, char_type newchar)
{
return subst_char(a, oldchar, newchar);
}
string const subst(string const & a,
string const & oldstr, string const & newstr)
{
return subst_string(a, oldstr, newstr);
}
docstring const subst(docstring const & a,
docstring const & oldstr, docstring const & newstr)
{
return subst_string(a, oldstr, newstr);
}
docstring const trim(docstring const & a, char const * p)
{
BOOST_ASSERT(p);
if (a.empty() || !*p)
return a;
docstring s = lyx::from_ascii(p);
docstring::size_type r = a.find_last_not_of(s);
docstring::size_type l = a.find_first_not_of(s);
// Is this the minimal test? (lgb)
if (r == docstring::npos && l == docstring::npos)
return docstring();
return a.substr(l, r - l + 1);
}
string const trim(string const & a, char const * p)
{
BOOST_ASSERT(p);
if (a.empty() || !*p)
return a;
string::size_type r = a.find_last_not_of(p);
string::size_type l = a.find_first_not_of(p);
// Is this the minimal test? (lgb)
if (r == string::npos && l == string::npos)
return string();
return a.substr(l, r - l + 1);
}
string const rtrim(string const & a, char const * p)
{
BOOST_ASSERT(p);
if (a.empty() || !*p)
return a;
string::size_type r = a.find_last_not_of(p);
// Is this test really needed? (Lgb)
if (r == string::npos)
return string();
return a.substr(0, r + 1);
}
string const ltrim(string const & a, char const * p)
{
BOOST_ASSERT(p);
if (a.empty() || !*p)
return a;
string::size_type l = a.find_first_not_of(p);
if (l == string::npos)
return string();
return a.substr(l, string::npos);
}
docstring const ltrim(docstring const & a, char const * p)
{
BOOST_ASSERT(p);
if (a.empty() || !*p)
return a;
size_t l = a.find_first_not_of(from_ascii(p));
if (l == docstring::npos)
return docstring();
return a.substr(l, docstring::npos);
}
namespace {
template<typename String, typename Char> inline
String const doSplit(String const & a, String & piece, Char delim)
{
String tmp;
typename String::size_type i = a.find(delim);
if (i == a.length() - 1) {
piece = a.substr(0, i);
} else if (i != String::npos) {
piece = a.substr(0, i);
tmp = a.substr(i + 1);
} else if (i == 0) {
piece.erase();
tmp = a.substr(i + 1);
} else {
piece = a;
}
return tmp;
}
}
string const split(string const & a, string & piece, char delim)
{
return doSplit(a, piece, delim);
}
docstring const split(docstring const & a, docstring & piece, char_type delim)
{
return doSplit(a, piece, delim);
}
string const split(string const & a, char delim)
{
string tmp;
string::size_type i = a.find(delim);
if (i != string::npos) // found delim
tmp = a.substr(i + 1);
return tmp;
}
// ale970521
string const rsplit(string const & a, string & piece, char delim)
{
string tmp;
string::size_type i = a.rfind(delim);
if (i != string::npos) { // delimiter was found
piece = a.substr(0, i);
tmp = a.substr(i + 1);
} else { // delimiter was not found
piece.erase();
}
return tmp;
}
// This function escapes 8-bit characters and other problematic
// characters that cause problems in latex labels.
docstring const escape(docstring const & lab)
{
lyx::char_type hexdigit[16] = { '0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
docstring enc;
for (docstring::size_type i = 0; i < lab.length(); ++i) {
lyx::char_type c = lab[i];
// FIXME We must change the following algorithm for UCS4
// chars, but that will be a file format change.
if (c >= 128 || c == '=' || c == '%') {
enc += '=';
enc += hexdigit[c>>4];
enc += hexdigit[c & 15];
} else {
enc += c;
}
}
return enc;
}
/// gives a vector of stringparts which have the delimiter delim
vector<string> const getVectorFromString(string const & str,
string const & delim)
{
// Lars would like this code to go, but for now his replacement (below)
// doesn't fullfil the same function. I have, therefore, reactivated the
// old code for now. Angus 11 Nov 2002.
#if 1
vector<string> vec;
if (str.empty())
return vec;
string keys = rtrim(str);
for(;;) {
string::size_type const idx = keys.find(delim);
if (idx == string::npos) {
vec.push_back(ltrim(keys));
break;
}
string const key = trim(keys.substr(0, idx));
if (!key.empty())
vec.push_back(key);
string::size_type const start = idx + delim.size();
keys = keys.substr(start);
}
return vec;
#else
boost::char_separator<char> sep(delim.c_str());
boost::tokenizer<boost::char_separator<char> > tokens(str, sep);
return vector<string>(tokens.begin(), tokens.end());
#endif
}
// the same vice versa
string const getStringFromVector(vector<string> const & vec,
string const & delim)
{
string str;
int i = 0;
for (vector<string>::const_iterator it = vec.begin();
it != vec.end(); ++it) {
string item = trim(*it);
if (item.empty())
continue;
if (i++ > 0)
str += delim;
str += item;
}
return str;
}
int findToken(char const * const str[], string const & search_token)
{
int i = 0;
while (str[i][0] && str[i] != search_token)
++i;
if (!str[i][0])
i = -1;
return i;
}
docstring const externalLineEnding(docstring const & str)
{
#if defined(__APPLE__)
// The MAC clipboard uses \r for lineendings, and we use \n
return subst(str, '\n', '\r');
#elif defined (_WIN32) || (defined (__CYGWIN__) && defined (X_DISPLAY_MISSING))
// Windows clipboard uses \r\n for lineendings, and we use \n
return subst(str, lyx::from_ascii("\n"), lyx::from_ascii("\r\n"));
#else
return str;
#endif
}
docstring const internalLineEnding(docstring const & str)
{
docstring const s = subst(str,
lyx::from_ascii("\r\n"), lyx::from_ascii("\n"));
return subst(s, '\r', '\n');
}
#ifndef I_AM_NOT_AFRAID_OF_HEADER_LIBRARIES
#if USE_BOOST_FORMAT
template<>
docstring bformat(docstring const & fmt, int arg1)
{
return (boost::basic_format<char_type>(fmt) % arg1).str();
}
template<>
docstring bformat(docstring const & fmt, long arg1)
{
return (boost::basic_format<char_type>(fmt) % arg1).str();
}
template<>
docstring bformat(docstring const & fmt, unsigned int arg1)
{
return (boost::basic_format<char_type>(fmt) % arg1).str();
}
template<>
docstring bformat<docstring>(docstring const & fmt, docstring arg1)
{
return (boost::basic_format<char_type>(fmt) % arg1).str();
}
template<>
docstring bformat(docstring const & fmt, char * arg1)
{
return (boost::basic_format<char_type>(fmt) % arg1).str();
}
template<>
docstring bformat(docstring const & fmt, int arg1, int arg2)
{
return (boost::basic_format<char_type>(fmt) % arg1 % arg2).str();
}
template<>
docstring bformat(docstring const & fmt, docstring arg1, docstring arg2)
{
return (boost::basic_format<char_type>(fmt) % arg1 % arg2).str();
}
template<>
docstring bformat(docstring const & fmt, char const * arg1, docstring arg2)
{
return (boost::basic_format<char_type>(fmt) % arg1 % arg2).str();
}
template<>
docstring bformat(docstring const & fmt, docstring arg1, docstring arg2, docstring arg3)
{
return (boost::basic_format<char_type>(fmt) % arg1 % arg2 % arg3).str();
}
template<>
docstring bformat(docstring const & fmt,
docstring arg1, docstring arg2, docstring arg3, docstring arg4)
{
return (boost::basic_format<char_type>(fmt) % arg1 % arg2 % arg3 % arg4).str();
}
#else
template<>
docstring bformat(docstring const & fmt, int arg1)
{
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%1$d")));
docstring const str = subst(fmt, lyx::from_ascii("%1$d"), convert<docstring>(arg1));
return subst(str, lyx::from_ascii("%%"), lyx::from_ascii("%"));
}
template<>
docstring bformat(docstring const & fmt, long arg1)
{
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%1$d")));
docstring const str = subst(fmt, lyx::from_ascii("%1$d"), convert<docstring>(arg1));
return subst(str, lyx::from_ascii("%%"), lyx::from_ascii("%"));
}
template<>
docstring bformat(docstring const & fmt, unsigned int arg1)
{
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%1$d")));
docstring const str = subst(fmt, lyx::from_ascii("%1$d"), convert<docstring>(arg1));
return subst(str, lyx::from_ascii("%%"), lyx::from_ascii("%"));
}
template<>
docstring bformat(docstring const & fmt, docstring arg1)
{
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%1$s")));
docstring const str = subst(fmt, lyx::from_ascii("%1$s"), arg1);
return subst(str, lyx::from_ascii("%%"), lyx::from_ascii("%"));
}
template<>
docstring bformat(docstring const & fmt, char * arg1)
{
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%1$s")));
docstring const str = subst(fmt, lyx::from_ascii("%1$s"), lyx::from_ascii(arg1));
return subst(str, lyx::from_ascii("%%"), lyx::from_ascii("%"));
}
template<>
docstring bformat(docstring const & fmt, docstring arg1, docstring arg2)
{
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%1$s")));
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%2$s")));
docstring str = subst(fmt, lyx::from_ascii("%1$s"), arg1);
str = subst(str, lyx::from_ascii("%2$s"), arg2);
return subst(str, lyx::from_ascii("%%"), lyx::from_ascii("%"));
}
template<>
docstring bformat(docstring const & fmt, char const * arg1, docstring arg2)
{
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%1$s")));
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%2$s")));
docstring str = subst(fmt, lyx::from_ascii("%1$s"), lyx::from_ascii(arg1));
str = subst(fmt, lyx::from_ascii("%2$s"), arg2);
return subst(str, lyx::from_ascii("%%"), lyx::from_ascii("%"));
}
template<>
docstring bformat(docstring const & fmt, int arg1, int arg2)
{
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%1$d")));
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%2$d")));
docstring str = subst(fmt, lyx::from_ascii("%1$d"), convert<docstring>(arg1));
str = subst(str, lyx::from_ascii("%2$d"), convert<docstring>(arg2));
return subst(str, lyx::from_ascii("%%"), lyx::from_ascii("%"));
}
template<>
docstring bformat(docstring const & fmt, docstring arg1, docstring arg2, docstring arg3)
{
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%1$s")));
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%2$s")));
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%3$s")));
docstring str = subst(fmt, lyx::from_ascii("%1$s"), arg1);
str = subst(str, lyx::from_ascii("%2$s"), arg2);
str = subst(str, lyx::from_ascii("%3$s"), arg3);
return subst(str, lyx::from_ascii("%%"), lyx::from_ascii("%"));
}
template<>
docstring bformat(docstring const & fmt,
docstring arg1, docstring arg2, docstring arg3, docstring arg4)
{
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%1$s")));
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%2$s")));
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%3$s")));
BOOST_ASSERT(contains(fmt, lyx::from_ascii("%4$s")));
docstring str = subst(fmt, lyx::from_ascii("%1$s"), arg1);
str = subst(str, lyx::from_ascii("%2$s"), arg2);
str = subst(str, lyx::from_ascii("%3$s"), arg3);
str = subst(str, lyx::from_ascii("%4$s"), arg4);
return subst(str, lyx::from_ascii("%%"), lyx::from_ascii("%"));
}
#endif
#endif
} // namespace support
} // namespace lyx