mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-11-11 21:49:51 +00:00
1a7aec0731
* src/support/docstring.C (do_get): use reserve() and the += operator in order to avoid a possible buffer overrun. git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@16070 a592a061-630c-0410-9148-cb99ea01b6c8
501 lines
13 KiB
C
501 lines
13 KiB
C
/**
|
|
* \file docstring.C
|
|
* This file is part of LyX, the document processor.
|
|
* Licence details can be found in the file COPYING.
|
|
*
|
|
* \author Georg Baum
|
|
*
|
|
* Full author contact details are available in file CREDITS.
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include "docstring.h"
|
|
#include "unicode.h"
|
|
|
|
#include <locale>
|
|
#include <iostream>
|
|
|
|
#include <boost/assert.hpp>
|
|
|
|
|
|
namespace lyx {
|
|
|
|
|
|
docstring const from_ascii(char const * ascii)
|
|
{
|
|
docstring s;
|
|
for (char const * c = ascii; *c; ++c) {
|
|
BOOST_ASSERT(static_cast<unsigned char>(*c) < 0x80);
|
|
s.push_back(*c);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
|
|
docstring const from_ascii(std::string const & ascii)
|
|
{
|
|
int const len = ascii.length();
|
|
for (int i = 0; i < len; ++i)
|
|
BOOST_ASSERT(static_cast<unsigned char>(ascii[i]) < 0x80);
|
|
return docstring(ascii.begin(), ascii.end());
|
|
}
|
|
|
|
|
|
std::string const to_ascii(docstring const & ucs4)
|
|
{
|
|
int const len = ucs4.length();
|
|
std::string ascii;
|
|
ascii.resize(len);
|
|
for (int i = 0; i < len; ++i) {
|
|
BOOST_ASSERT(ucs4[i] < 0x80);
|
|
ascii[i] = static_cast<char>(ucs4[i]);
|
|
}
|
|
return ascii;
|
|
}
|
|
|
|
|
|
void utf8_to_ucs4(std::string const & utf8, docstring & ucs4)
|
|
{
|
|
size_t n = utf8.size();
|
|
// as utf8 is a multi-byte encoding, there would be at most
|
|
// n characters:
|
|
ucs4.resize(n);
|
|
if (n == 0)
|
|
return;
|
|
|
|
int maxoutsize = n * 4;
|
|
// basic_string::data() is not recognized by some old gcc version
|
|
// so we use &(ucs4[0]) instead.
|
|
char * outbuf = (char *)(&(ucs4[0]));
|
|
int bytes = utf8ToUcs4().convert(utf8.c_str(), n, outbuf, maxoutsize);
|
|
|
|
// adjust to the real converted size
|
|
ucs4.resize(bytes/4);
|
|
}
|
|
|
|
|
|
docstring const from_utf8(std::string const & utf8)
|
|
{
|
|
docstring ucs4;
|
|
utf8_to_ucs4(utf8, ucs4);
|
|
return ucs4;
|
|
}
|
|
|
|
|
|
std::string const to_utf8(docstring const & ucs4)
|
|
{
|
|
std::vector<char> const utf8 =
|
|
ucs4_to_utf8(ucs4.data(), ucs4.size());
|
|
return std::string(utf8.begin(), utf8.end());
|
|
}
|
|
|
|
|
|
bool operator==(lyx::docstring const & l, char const * r)
|
|
{
|
|
int const len = l.length();
|
|
for (int i = 0; i < len; ++i) {
|
|
BOOST_ASSERT(static_cast<unsigned char>(r[i]) < 0x80);
|
|
if (!r[i])
|
|
return false;
|
|
if (l[i] != lyx::docstring::value_type(r[i]))
|
|
return false;
|
|
}
|
|
return r[len] == '\0';
|
|
}
|
|
|
|
|
|
lyx::docstring operator+(lyx::docstring const & l, char const * r)
|
|
{
|
|
lyx::docstring s(l);
|
|
for (char const * c = r; *c; ++c) {
|
|
BOOST_ASSERT(static_cast<unsigned char>(*c) < 0x80);
|
|
s.push_back(*c);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
|
|
lyx::docstring operator+(char const * l, lyx::docstring const & r)
|
|
{
|
|
lyx::docstring s;
|
|
for (char const * c = l; *c; ++c) {
|
|
BOOST_ASSERT(static_cast<unsigned char>(*c) < 0x80);
|
|
s.push_back(*c);
|
|
}
|
|
s += r;
|
|
return s;
|
|
}
|
|
|
|
|
|
lyx::docstring operator+(lyx::docstring const & l, char r)
|
|
{
|
|
BOOST_ASSERT(static_cast<unsigned char>(r) < 0x80);
|
|
return l + lyx::docstring::value_type(r);
|
|
}
|
|
|
|
|
|
lyx::docstring operator+(char l, lyx::docstring const & r)
|
|
{
|
|
BOOST_ASSERT(static_cast<unsigned char>(l) < 0x80);
|
|
return lyx::docstring::value_type(l) + r;
|
|
}
|
|
|
|
|
|
lyx::docstring & operator+=(lyx::docstring & l, char const * r)
|
|
{
|
|
for (char const * c = r; *c; ++c) {
|
|
BOOST_ASSERT(static_cast<unsigned char>(*c) < 0x80);
|
|
l.push_back(*c);
|
|
}
|
|
return l;
|
|
}
|
|
|
|
|
|
lyx::docstring & operator+=(lyx::docstring & l, char r)
|
|
{
|
|
BOOST_ASSERT(static_cast<unsigned char>(r) < 0x80);
|
|
l.push_back(r);
|
|
return l;
|
|
}
|
|
|
|
} // namespace lyx
|
|
|
|
#if (!defined(HAVE_WCHAR_T) || SIZEOF_WCHAR_T != 4) && defined(__GNUC__)
|
|
|
|
// gcc does not have proper locale facets for lyx::char_type if
|
|
// sizeof(wchar_t) == 2, so we have to implement them on our own.
|
|
|
|
|
|
// We get undefined references to these virtual methods. This looks like
|
|
// a bug in gcc. The implementation here does not do anything useful, since
|
|
// it is overriden in ascii_ctype_facet.
|
|
namespace std {
|
|
template<> ctype<lyx::char_type>::~ctype() {}
|
|
template<> bool
|
|
ctype<lyx::char_type>::do_is(ctype<lyx::char_type>::mask, lyx::char_type) const { return false; }
|
|
template<> lyx::char_type const *
|
|
ctype<lyx::char_type>::do_is(const lyx::char_type *, const lyx::char_type *, ctype<lyx::char_type>::mask *) const { return 0; }
|
|
template<> const lyx::char_type *
|
|
ctype<lyx::char_type>::do_scan_is(ctype<lyx::char_type>::mask, const lyx::char_type *, const lyx::char_type *) const { return 0; }
|
|
template<> const lyx::char_type *
|
|
ctype<lyx::char_type>::do_scan_not(ctype<lyx::char_type>::mask, const lyx::char_type *, const lyx::char_type *) const { return 0; }
|
|
template<> lyx::char_type ctype<lyx::char_type>::do_toupper(lyx::char_type) const { return 0; }
|
|
template<> const lyx::char_type * ctype<lyx::char_type>::do_toupper(lyx::char_type *, lyx::char_type const *) const { return 0; }
|
|
template<> lyx::char_type ctype<lyx::char_type>::do_tolower(lyx::char_type) const { return 0; }
|
|
template<> const lyx::char_type * ctype<lyx::char_type>::do_tolower(lyx::char_type *, lyx::char_type const *) const { return 0; }
|
|
template<> lyx::char_type ctype<lyx::char_type>::do_widen(char) const { return 0; }
|
|
template<> const char *
|
|
ctype<lyx::char_type>::do_widen(const char *, const char *, lyx::char_type *) const { return 0; }
|
|
template<> char
|
|
ctype<lyx::char_type>::do_narrow(const lyx::char_type, char) const { return 0; }
|
|
template<> const lyx::char_type *
|
|
ctype<lyx::char_type>::do_narrow(const lyx::char_type *, const lyx::char_type *, char, char *) const { return 0; }
|
|
}
|
|
|
|
|
|
namespace lyx {
|
|
|
|
class ctype_failure : public std::bad_cast {
|
|
public:
|
|
ctype_failure() throw() : std::bad_cast() {}
|
|
virtual ~ctype_failure() throw() {}
|
|
virtual const char* what() const throw()
|
|
{
|
|
return "The ctype<lyx::char_type> locale facet does only support ASCII characters on this platform.";
|
|
}
|
|
};
|
|
|
|
|
|
class num_put_failure : public std::bad_cast {
|
|
public:
|
|
num_put_failure() throw() : std::bad_cast() {}
|
|
virtual ~num_put_failure() throw() {}
|
|
virtual const char* what() const throw()
|
|
{
|
|
return "The num_put locale facet does only support ASCII characters on this platform.";
|
|
}
|
|
};
|
|
|
|
|
|
/// ctype facet for UCS4 characters. The implementation does only support pure
|
|
/// ASCII, since we do not need anything else for now.
|
|
/// The code is partly stolen from std::ctype<wchar_t> from gcc.
|
|
class ascii_ctype_facet : public std::ctype<lyx::char_type>
|
|
{
|
|
public:
|
|
typedef lyx::char_type char_type;
|
|
typedef wctype_t wmask_type;
|
|
explicit ascii_ctype_facet(size_t refs = 0) : std::ctype<char_type>(refs)
|
|
{
|
|
M_initialize_ctype();
|
|
}
|
|
protected:
|
|
bool M_narrow_ok;
|
|
char M_narrow[128];
|
|
wint_t M_widen[1 + static_cast<unsigned char>(-1)];
|
|
mask M_bit[16];
|
|
wmask_type M_wmask[16];
|
|
wmask_type M_convert_to_wmask(const mask m) const
|
|
{
|
|
wmask_type ret;
|
|
switch (m) {
|
|
case space: ret = wctype("space"); break;
|
|
case print: ret = wctype("print"); break;
|
|
case cntrl: ret = wctype("cntrl"); break;
|
|
case upper: ret = wctype("upper"); break;
|
|
case lower: ret = wctype("lower"); break;
|
|
case alpha: ret = wctype("alpha"); break;
|
|
case digit: ret = wctype("digit"); break;
|
|
case punct: ret = wctype("punct"); break;
|
|
case xdigit: ret = wctype("xdigit"); break;
|
|
case alnum: ret = wctype("alnum"); break;
|
|
case graph: ret = wctype("graph"); break;
|
|
default: ret = wmask_type();
|
|
}
|
|
return ret;
|
|
}
|
|
void M_initialize_ctype()
|
|
{
|
|
wint_t i;
|
|
for (i = 0; i < 128; ++i) {
|
|
const int c = wctob(i);
|
|
if (c == EOF)
|
|
break;
|
|
else
|
|
M_narrow[i] = static_cast<char>(c);
|
|
}
|
|
if (i == 128)
|
|
M_narrow_ok = true;
|
|
else
|
|
M_narrow_ok = false;
|
|
for (size_t i = 0; i < sizeof(M_widen) / sizeof(wint_t); ++i)
|
|
M_widen[i] = btowc(i);
|
|
|
|
for (size_t i = 0; i <= 15; ++i) {
|
|
M_bit[i] = static_cast<mask>(1 << i);
|
|
M_wmask[i] = M_convert_to_wmask(M_bit[i]);
|
|
}
|
|
}
|
|
virtual ~ascii_ctype_facet() {}
|
|
char_type do_toupper(char_type c) const
|
|
{
|
|
if (c >= 0x80)
|
|
throw ctype_failure();
|
|
return toupper(static_cast<int>(c));
|
|
}
|
|
char_type const * do_toupper(char_type * lo, char_type const * hi) const
|
|
{
|
|
while (lo < hi) {
|
|
if (*lo >= 0x80)
|
|
throw ctype_failure();
|
|
*lo = toupper(static_cast<int>(*lo));
|
|
++lo;
|
|
}
|
|
return hi;
|
|
}
|
|
char_type do_tolower(char_type c) const
|
|
{
|
|
if (c >= 0x80)
|
|
throw ctype_failure();
|
|
return tolower(c);
|
|
}
|
|
char_type const * do_tolower(char_type * lo, char_type const * hi) const
|
|
{
|
|
while (lo < hi) {
|
|
if (*lo >= 0x80)
|
|
throw ctype_failure();
|
|
*lo = tolower(*lo);
|
|
++lo;
|
|
}
|
|
return hi;
|
|
}
|
|
bool do_is(mask m, char_type c) const
|
|
{
|
|
if (c >= 0x80)
|
|
throw ctype_failure();
|
|
// The code below works because c is in the ASCII range.
|
|
// We could not use iswctype() which is designed for a 2byte
|
|
// whar_t without encoding conversion otherwise.
|
|
bool ret = false;
|
|
// Generically, 15 (instead of 10) since we don't know the numerical
|
|
// encoding of the various categories in /usr/include/ctype.h.
|
|
const size_t bitmasksize = 15;
|
|
for (size_t bitcur = 0; bitcur <= bitmasksize; ++bitcur)
|
|
if (m & M_bit[bitcur] &&
|
|
iswctype(static_cast<int>(c), M_wmask[bitcur])) {
|
|
ret = true;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
char_type const * do_is(char_type const * lo, char_type const * hi, mask * vec) const
|
|
{
|
|
for (;lo < hi; ++vec, ++lo) {
|
|
if (*lo >= 0x80)
|
|
throw ctype_failure();
|
|
// The code below works because c is in the ASCII range.
|
|
// We could not use iswctype() which is designed for a 2byte
|
|
// whar_t without encoding conversion otherwise.
|
|
// Generically, 15 (instead of 10) since we don't know the numerical
|
|
// encoding of the various categories in /usr/include/ctype.h.
|
|
const size_t bitmasksize = 15;
|
|
mask m = 0;
|
|
for (size_t bitcur = 0; bitcur <= bitmasksize; ++bitcur)
|
|
if (iswctype(static_cast<int>(*lo), M_wmask[bitcur]))
|
|
m |= M_bit[bitcur];
|
|
*vec = m;
|
|
}
|
|
return hi;
|
|
}
|
|
char_type const * do_scan_is(mask m, char_type const * lo, char_type const * hi) const
|
|
{
|
|
while (lo < hi && !this->do_is(m, *lo))
|
|
++lo;
|
|
return lo;
|
|
}
|
|
char_type const * do_scan_not(mask m, char_type const * lo, char_type const * hi) const
|
|
{
|
|
while (lo < hi && this->do_is(m, *lo) != 0)
|
|
++lo;
|
|
return lo;
|
|
}
|
|
char_type do_widen(char c) const
|
|
{
|
|
if (static_cast<unsigned char>(c) < 0x80)
|
|
return c;
|
|
throw ctype_failure();
|
|
}
|
|
const char* do_widen(const char* lo, const char* hi, char_type* dest) const
|
|
{
|
|
while (lo < hi) {
|
|
if (static_cast<unsigned char>(*lo) >= 0x80)
|
|
throw ctype_failure();
|
|
*dest = *lo;
|
|
++lo;
|
|
++dest;
|
|
}
|
|
return hi;
|
|
}
|
|
char do_narrow(char_type wc, char) const
|
|
{
|
|
if (wc < 0x80)
|
|
return static_cast<char>(wc);
|
|
throw ctype_failure();
|
|
}
|
|
const char_type * do_narrow(const char_type * lo, const char_type * hi, char, char * dest) const
|
|
{
|
|
while (lo < hi) {
|
|
if (*lo < 0x80)
|
|
*dest = static_cast<char>(*lo);
|
|
else
|
|
throw ctype_failure();
|
|
++lo;
|
|
++dest;
|
|
}
|
|
return hi;
|
|
}
|
|
};
|
|
|
|
|
|
/// Facet for outputting numbers to odocstreams as ascii.
|
|
/// Here we simply need defining the virtual do_put functions.
|
|
class ascii_num_put_facet : public std::num_put<lyx::char_type, std::ostreambuf_iterator<lyx::char_type, std::char_traits<lyx::char_type> > >
|
|
{
|
|
typedef std::ostreambuf_iterator<lyx::char_type, std::char_traits<lyx::char_type> > iter_type;
|
|
public:
|
|
ascii_num_put_facet(size_t refs = 0) : std::num_put<lyx::char_type, iter_type>(refs) {}
|
|
|
|
/// Facet for converting numbers to ascii strings.
|
|
class string_num_put_facet : public std::num_put<char, std::basic_string<char>::iterator>
|
|
{
|
|
public:
|
|
string_num_put_facet() : std::num_put<char, std::basic_string<char>::iterator>(1) {}
|
|
};
|
|
|
|
protected:
|
|
iter_type
|
|
do_put(iter_type oit, std::ios_base & b, char_type fill, long v) const
|
|
{
|
|
if (fill >= 0x80)
|
|
throw num_put_failure();
|
|
|
|
std::string s;
|
|
// 64 is large enough
|
|
s.resize(64);
|
|
string_num_put_facet f;
|
|
std::string::const_iterator cit = s.begin();
|
|
std::string::const_iterator end =
|
|
f.put(s.begin(), b, fill, v);
|
|
for (; cit != end; ++cit, ++oit)
|
|
*oit = *cit;
|
|
|
|
return oit;
|
|
}
|
|
};
|
|
|
|
|
|
/// Facet for inputting ascii representations of numbers from idocstreams.
|
|
/// Here we simply need defining the virtual do_get functions.
|
|
class ascii_num_get_facet : public std::num_get<lyx::char_type, std::istreambuf_iterator<lyx::char_type, std::char_traits<lyx::char_type> > >
|
|
{
|
|
typedef std::istreambuf_iterator<lyx::char_type, std::char_traits<lyx::char_type> > iter_type;
|
|
public:
|
|
ascii_num_get_facet(size_t refs = 0) : std::num_get<lyx::char_type, iter_type>(refs) {}
|
|
|
|
/// Facet for converting ascii representation of numbers to a value.
|
|
class string_num_get_facet : public std::num_get<char, std::basic_string<char>::iterator>
|
|
{
|
|
public:
|
|
string_num_get_facet() : std::num_get<char, std::basic_string<char>::iterator>(1) {}
|
|
};
|
|
|
|
private:
|
|
bool isNumpunct(lyx::char_type const c) const
|
|
{
|
|
/// Only account for the standard numpunct "C" locale facet.
|
|
return c < 0x80 && (c == '-' || c == '+' || isdigit(c)
|
|
|| ('a' <= c && c <= 'f') || ('A' <= c && c <= 'F')
|
|
|| c == 'x' || c == 'X');
|
|
}
|
|
|
|
protected:
|
|
iter_type
|
|
do_get(iter_type iit, iter_type eit, std::ios_base & b,
|
|
std::ios_base::iostate & err, long & v) const
|
|
{
|
|
std::string s;
|
|
s.reserve(64);
|
|
for (; iit != eit && isNumpunct(*iit); ++iit)
|
|
s += static_cast<char>(*iit);
|
|
string_num_get_facet f;
|
|
f.get(s.begin(), s.end(), b, err, v);
|
|
|
|
return iit;
|
|
}
|
|
};
|
|
|
|
|
|
/// class to add our facets to the global locale
|
|
class locale_initializer {
|
|
public:
|
|
locale_initializer()
|
|
{
|
|
std::locale global;
|
|
std::locale const loc1(global, new ascii_ctype_facet);
|
|
std::locale const loc2(loc1, new ascii_num_put_facet);
|
|
std::locale const loc3(loc2, new ascii_num_get_facet);
|
|
std::locale::global(loc3);
|
|
}
|
|
};
|
|
|
|
|
|
namespace {
|
|
|
|
/// make sure that our facets get used
|
|
static locale_initializer initializer;
|
|
|
|
}
|
|
}
|
|
#endif
|