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qpdf/libqpdf/QUtil.cc

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// Include qpdf-config.h first so off_t is guaranteed to have the right size.
#include <qpdf/qpdf-config.h>
#include <qpdf/QUtil.hh>
#include <qpdf/PointerHolder.hh>
#ifdef USE_INSECURE_RANDOM
# include <qpdf/InsecureRandomDataProvider.hh>
#endif
#include <qpdf/SecureRandomDataProvider.hh>
#include <qpdf/QPDFSystemError.hh>
#include <cmath>
#include <iomanip>
#include <sstream>
#include <fstream>
#include <stdexcept>
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#ifdef _WIN32
#include <windows.h>
#include <direct.h>
#include <io.h>
#else
#include <unistd.h>
#include <sys/stat.h>
#endif
std::string
QUtil::int_to_string(long long num, int length)
{
return int_to_string_base(num, 10, length);
}
std::string
QUtil::int_to_string_base(long long num, int base, int length)
{
// Backward compatibility -- int_to_string, which calls this
// function, used to use sprintf with %0*d, so we interpret length
// such that a negative value appends spaces and a positive value
// prepends zeroes.
if (! ((base == 8) || (base == 10) || (base == 16)))
{
throw std::logic_error(
"int_to_string_base called with unsupported base");
}
std::ostringstream buf;
buf << std::setbase(base) << std::nouppercase << num;
std::string result;
if ((length > 0) &&
(buf.str().length() < static_cast<size_t>(length)))
{
result.append(length - buf.str().length(), '0');
}
result += buf.str();
if ((length < 0) && (buf.str().length() < static_cast<size_t>(-length)))
{
result.append(-length - buf.str().length(), ' ');
}
return result;
}
std::string
QUtil::double_to_string(double num, int decimal_places)
{
// Backward compatibility -- this code used to use sprintf and
// treated decimal_places <= 0 to mean to use the default, which
// was six decimal places. Also sprintf with %*.f interprets the
// length as fixed point rather than significant figures.
if (decimal_places <= 0)
{
decimal_places = 6;
}
std::ostringstream buf;
buf << std::setprecision(decimal_places) << std::fixed << num;
return buf.str();
}
long long
QUtil::string_to_ll(char const* str)
{
errno = 0;
#ifdef _MSC_VER
long long result = _strtoi64(str, 0, 10);
#else
long long result = strtoll(str, 0, 10);
#endif
if (errno == ERANGE)
{
throw std::runtime_error(
std::string("overflow/underflow converting ") + str
+ " to 64-bit integer");
}
return result;
}
int
QUtil::string_to_int(char const* str)
{
errno = 0;
long long_val = strtol(str, 0, 10);
if (errno == ERANGE)
{
throw std::runtime_error(
std::string("overflow/underflow converting ") + str
+ " to long integer");
}
int result = static_cast<int>(long_val);
if (static_cast<long>(result) != long_val)
{
throw std::runtime_error(
std::string("overflow/underflow converting ") + str
+ " to integer");
}
return result;
}
unsigned char*
QUtil::unsigned_char_pointer(std::string const& str)
{
return reinterpret_cast<unsigned char*>(const_cast<char*>(str.c_str()));
}
unsigned char*
QUtil::unsigned_char_pointer(char const* str)
{
return reinterpret_cast<unsigned char*>(const_cast<char*>(str));
}
void
QUtil::throw_system_error(std::string const& description)
{
throw QPDFSystemError(description, errno);
}
int
QUtil::os_wrapper(std::string const& description, int status)
{
if (status == -1)
{
throw_system_error(description);
}
return status;
}
FILE*
QUtil::safe_fopen(char const* filename, char const* mode)
{
FILE* f = 0;
#ifdef _MSC_VER
errno_t err = fopen_s(&f, filename, mode);
if (err != 0)
{
errno = err;
throw_system_error(std::string("open ") + filename);
}
#else
f = fopen_wrapper(std::string("open ") + filename, fopen(filename, mode));
#endif
return f;
}
FILE*
QUtil::fopen_wrapper(std::string const& description, FILE* f)
{
if (f == 0)
{
throw_system_error(description);
}
return f;
}
int
QUtil::seek(FILE* stream, qpdf_offset_t offset, int whence)
{
#if HAVE_FSEEKO
return fseeko(stream, static_cast<off_t>(offset), whence);
#elif HAVE_FSEEKO64
return fseeko64(stream, offset, whence);
#else
# if defined _MSC_VER || defined __BORLANDC__
return _fseeki64(stream, offset, whence);
# else
return fseek(stream, static_cast<long>(offset), whence);
# endif
#endif
}
qpdf_offset_t
QUtil::tell(FILE* stream)
{
#if HAVE_FSEEKO
return static_cast<qpdf_offset_t>(ftello(stream));
#elif HAVE_FSEEKO64
return static_cast<qpdf_offset_t>(ftello64(stream));
#else
# if defined _MSC_VER || defined __BORLANDC__
return _ftelli64(stream);
# else
return static_cast<qpdf_offset_t>(ftell(stream));
# endif
#endif
}
bool
QUtil::same_file(char const* name1, char const* name2)
{
if ((name1 == 0) || (strlen(name1) == 0) ||
(name2 == 0) || (strlen(name2) == 0))
{
return false;
}
#ifdef _WIN32
bool same = false;
# ifndef AVOID_WINDOWS_HANDLE
HANDLE fh1 = CreateFile(name1, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
HANDLE fh2 = CreateFile(name2, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
BY_HANDLE_FILE_INFORMATION fi1;
BY_HANDLE_FILE_INFORMATION fi2;
if ((fh1 != INVALID_HANDLE_VALUE) &&
(fh2 != INVALID_HANDLE_VALUE) &&
GetFileInformationByHandle(fh1, &fi1) &&
GetFileInformationByHandle(fh2, &fi2) &&
(fi1.dwVolumeSerialNumber == fi2.dwVolumeSerialNumber) &&
(fi1.nFileIndexLow == fi2.nFileIndexLow) &&
(fi1.nFileIndexHigh == fi2.nFileIndexHigh))
{
same = true;
}
if (fh1 != INVALID_HANDLE_VALUE)
{
CloseHandle(fh1);
}
if (fh2 != INVALID_HANDLE_VALUE)
{
CloseHandle(fh2);
}
# endif
return same;
#else
struct stat st1;
struct stat st2;
if ((stat(name1, &st1) == 0) &&
(stat(name2, &st2) == 0) &&
(st1.st_ino == st2.st_ino) &&
(st1.st_dev == st2.st_dev))
{
return true;
}
#endif
return false;
}
char*
QUtil::copy_string(std::string const& str)
{
char* result = new char[str.length() + 1];
// Use memcpy in case string contains nulls
result[str.length()] = '\0';
memcpy(result, str.c_str(), str.length());
return result;
}
std::string
QUtil::hex_encode(std::string const& input)
{
std::string result;
for (unsigned int i = 0; i < input.length(); ++i)
{
result += QUtil::int_to_string_base(
static_cast<int>(static_cast<unsigned char>(input.at(i))), 16, 2);
}
return result;
}
std::string
QUtil::hex_decode(std::string const& input)
{
std::string result;
size_t pos = 0;
for (std::string::const_iterator p = input.begin(); p != input.end(); ++p)
{
char ch = *p;
bool skip = false;
if ((*p >= 'A') && (*p <= 'F'))
{
ch -= 'A';
ch += 10;
}
else if ((*p >= 'a') && (*p <= 'f'))
{
ch -= 'a';
ch += 10;
}
else if ((*p >= '0') && (*p <= '9'))
{
ch -= '0';
}
else
{
skip = true;
}
if (! skip)
{
if (pos == 0)
{
result.push_back(ch << 4);
pos = 1;
}
else
{
result[result.length()-1] += ch;
pos = 0;
}
}
}
return result;
}
void
QUtil::binary_stdout()
{
#ifdef _WIN32
_setmode(_fileno(stdout), _O_BINARY);
#endif
}
void
QUtil::binary_stdin()
{
#ifdef _WIN32
_setmode(_fileno(stdin), _O_BINARY);
#endif
}
void
QUtil::setLineBuf(FILE* f)
{
#ifndef _WIN32
setvbuf(f, reinterpret_cast<char *>(0), _IOLBF, 0);
#endif
}
char*
QUtil::getWhoami(char* argv0)
{
char* whoami = 0;
if (((whoami = strrchr(argv0, '/')) == NULL) &&
((whoami = strrchr(argv0, '\\')) == NULL))
{
whoami = argv0;
}
else
{
++whoami;
}
if ((strlen(whoami) > 4) &&
(strcmp(whoami + strlen(whoami) - 4, ".exe") == 0))
{
whoami[strlen(whoami) - 4] = '\0';
}
return whoami;
}
bool
QUtil::get_env(std::string const& var, std::string* value)
{
// This was basically ripped out of wxWindows.
#ifdef _WIN32
# ifdef NO_GET_ENVIRONMENT
return false;
# else
// first get the size of the buffer
DWORD len = ::GetEnvironmentVariable(var.c_str(), NULL, 0);
if (len == 0)
{
// this means that there is no such variable
return false;
}
if (value)
{
char* t = new char[len + 1];
::GetEnvironmentVariable(var.c_str(), t, len);
*value = t;
delete [] t;
}
return true;
# endif
#else
char* p = getenv(var.c_str());
if (p == 0)
{
return false;
}
if (value)
{
*value = p;
}
return true;
#endif
}
time_t
QUtil::get_current_time()
{
#ifdef _WIN32
// The procedure to get local time at this resolution comes from
// the Microsoft documentation. It says to convert a SYSTEMTIME
// to a FILETIME, and to copy the FILETIME to a ULARGE_INTEGER.
// The resulting number is the number of 100-nanosecond intervals
// between January 1, 1601 and now. POSIX threads wants a time
// based on January 1, 1970, so we adjust by subtracting the
// number of seconds in that time period from the result we get
// here.
SYSTEMTIME sysnow;
GetSystemTime(&sysnow);
FILETIME filenow;
SystemTimeToFileTime(&sysnow, &filenow);
ULARGE_INTEGER uinow;
uinow.LowPart = filenow.dwLowDateTime;
uinow.HighPart = filenow.dwHighDateTime;
ULONGLONG now = uinow.QuadPart;
return ((now / 10000000LL) - 11644473600LL);
#else
return time(0);
#endif
}
std::string
QUtil::toUTF8(unsigned long uval)
{
std::string result;
// A UTF-8 encoding of a Unicode value is a single byte for
// Unicode values <= 127. For larger values, the first byte of
// the UTF-8 encoding has '1' as each of its n highest bits and
// '0' for its (n+1)th highest bit where n is the total number of
// bytes required. Subsequent bytes start with '10' and have the
// remaining 6 bits free for encoding. For example, an 11-bit
// Unicode value can be stored in two bytes where the first is
// 110zzzzz, the second is 10zzzzzz, and the z's represent the
// remaining bits.
if (uval > 0x7fffffff)
{
throw std::runtime_error("bounds error in QUtil::toUTF8");
}
else if (uval < 128)
{
result += static_cast<char>(uval);
}
else
{
unsigned char bytes[7];
bytes[6] = '\0';
unsigned char* cur_byte = &bytes[5];
// maximum value that will fit in the current number of bytes
unsigned char maxval = 0x3f; // six bits
while (uval > maxval)
{
// Assign low six bits plus 10000000 to lowest unused
// byte position, then shift
*cur_byte = static_cast<unsigned char>(0x80 + (uval & 0x3f));
uval >>= 6;
// Maximum that will fit in high byte now shrinks by one bit
maxval >>= 1;
// Slide to the left one byte
if (cur_byte <= bytes)
{
throw std::logic_error("QUtil::toUTF8: overflow error");
}
--cur_byte;
}
// If maxval is k bits long, the high (7 - k) bits of the
// resulting byte must be high.
*cur_byte = static_cast<unsigned char>(
(0xff - (1 + (maxval << 1))) + uval);
result += reinterpret_cast<char*>(cur_byte);
}
return result;
}
std::string
QUtil::toUTF16(unsigned long uval)
{
std::string result;
if ((uval >= 0xd800) && (uval <= 0xdfff))
{
result = "\xff\xfd";
}
else if (uval <= 0xffff)
{
char out[2];
out[0] = (uval & 0xff00) >> 8;
out[1] = (uval & 0xff);
result = std::string(out, 2);
}
else if (uval <= 0x10ffff)
{
char out[4];
uval -= 0x10000;
unsigned short high = ((uval & 0xffc00) >> 10) + 0xd800;
unsigned short low = (uval & 0x3ff) + 0xdc00;
out[0] = (high & 0xff00) >> 8;
out[1] = (high & 0xff);
out[2] = (low & 0xff00) >> 8;
out[3] = (low & 0xff);
result = std::string(out, 4);
}
else
{
result = "\xff\xfd";
}
return result;
}
// Random data support
long
QUtil::random()
{
long result = 0L;
initializeWithRandomBytes(
reinterpret_cast<unsigned char*>(&result),
sizeof(result));
return result;
}
static RandomDataProvider* random_data_provider = 0;
#ifdef USE_INSECURE_RANDOM
static RandomDataProvider* insecure_random_data_provider =
InsecureRandomDataProvider::getInstance();
#else
static RandomDataProvider* insecure_random_data_provider = 0;
#endif
static RandomDataProvider* secure_random_data_provider =
SecureRandomDataProvider::getInstance();
static void
initialize_random_data_provider()
{
if (random_data_provider == 0)
{
if (secure_random_data_provider)
{
random_data_provider = secure_random_data_provider;
}
else if (insecure_random_data_provider)
{
random_data_provider = insecure_random_data_provider;
}
}
// QUtil.hh has comments indicating that getRandomDataProvider(),
// which calls this method, never returns null.
if (random_data_provider == 0)
{
throw std::logic_error("QPDF has no random data provider");
}
}
void
QUtil::setRandomDataProvider(RandomDataProvider* p)
{
random_data_provider = p;
}
RandomDataProvider*
QUtil::getRandomDataProvider()
{
initialize_random_data_provider();
return random_data_provider;
}
void
QUtil::initializeWithRandomBytes(unsigned char* data, size_t len)
{
initialize_random_data_provider();
random_data_provider->provideRandomData(data, len);
}
void
QUtil::srandom(unsigned int seed)
{
#ifdef HAVE_RANDOM
::srandom(seed);
#else
srand(seed);
#endif
}
bool
QUtil::is_hex_digit(char ch)
{
return (ch && (strchr("0123456789abcdefABCDEF", ch) != 0));
}
bool
QUtil::is_space(char ch)
{
return (ch && (strchr(" \f\n\r\t\v", ch) != 0));
}
bool
QUtil::is_digit(char ch)
{
return ((ch >= '0') && (ch <= '9'));
}
bool
QUtil::is_number(char const* p)
{
// ^[\+\-]?(\.\d*|\d+(\.\d*)?)$
if (! *p)
{
return false;
}
if ((*p == '-') || (*p == '+'))
{
++p;
}
bool found_dot = false;
bool found_digit = false;
for (; *p; ++p)
{
if (*p == '.')
{
if (found_dot)
{
// only one dot
return false;
}
found_dot = true;
}
else if (QUtil::is_digit(*p))
{
found_digit = true;
}
else
{
return false;
}
}
return found_digit;
}
std::list<std::string>
QUtil::read_lines_from_file(char const* filename)
{
std::ifstream in(filename, std::ios_base::binary);
if (! in.is_open())
{
throw_system_error(std::string("open ") + filename);
}
std::list<std::string> lines = read_lines_from_file(in);
in.close();
return lines;
}
std::list<std::string>
QUtil::read_lines_from_file(std::istream& in)
{
std::list<std::string> result;
std::string* buf = 0;
char c;
while (in.get(c))
{
if (buf == 0)
{
result.push_back("");
buf = &(result.back());
buf->reserve(80);
}
if (buf->capacity() == buf->size())
{
buf->reserve(buf->capacity() * 2);
}
if (c == '\n')
{
// Remove any carriage return that preceded the
// newline and discard the newline
if ((! buf->empty()) && ((*(buf->rbegin())) == '\r'))
{
buf->erase(buf->length() - 1);
}
buf = 0;
}
else
{
buf->append(1, c);
}
}
return result;
}
int
QUtil::strcasecmp(char const *s1, char const *s2)
{
#ifdef _WIN32
return _stricmp(s1, s2);
#else
return ::strcasecmp(s1, s2);
#endif
}
static int maybe_from_end(int num, bool from_end, int max)
{
if (from_end)
{
if (num > max)
{
num = 0;
}
else
{
num = max + 1 - num;
}
}
return num;
}
std::vector<int>
QUtil::parse_numrange(char const* range, int max)
{
std::vector<int> result;
char const* p = range;
try
{
std::vector<int> work;
static int const comma = -1;
static int const dash = -2;
enum { st_top,
st_in_number,
st_after_number } state = st_top;
bool last_separator_was_dash = false;
int cur_number = 0;
bool from_end = false;
while (*p)
{
char ch = *p;
if (isdigit(ch))
{
if (! ((state == st_top) || (state == st_in_number)))
{
throw std::runtime_error("digit not expected");
}
state = st_in_number;
cur_number *= 10;
cur_number += (ch - '0');
}
else if (ch == 'z')
{
// z represents max
if (! (state == st_top))
{
throw std::runtime_error("z not expected");
}
state = st_after_number;
cur_number = max;
}
else if (ch == 'r')
{
if (! (state == st_top))
{
throw std::runtime_error("r not expected");
}
state = st_in_number;
from_end = true;
}
else if ((ch == ',') || (ch == '-'))
{
if (! ((state == st_in_number) || (state == st_after_number)))
{
throw std::runtime_error("unexpected separator");
}
cur_number = maybe_from_end(cur_number, from_end, max);
work.push_back(cur_number);
cur_number = 0;
from_end = false;
if (ch == ',')
{
state = st_top;
last_separator_was_dash = false;
work.push_back(comma);
}
else if (ch == '-')
{
if (last_separator_was_dash)
{
throw std::runtime_error("unexpected dash");
}
state = st_top;
last_separator_was_dash = true;
work.push_back(dash);
}
}
else
{
throw std::runtime_error("unexpected character");
}
++p;
}
if ((state == st_in_number) || (state == st_after_number))
{
cur_number = maybe_from_end(cur_number, from_end, max);
work.push_back(cur_number);
}
else
{
throw std::runtime_error("number expected");
}
p = 0;
for (size_t i = 0; i < work.size(); i += 2)
{
int num = work.at(i);
// max == 0 means we don't know the max and are just
// testing for valid syntax.
if ((max > 0) && ((num < 1) || (num > max)))
{
throw std::runtime_error(
"number " + QUtil::int_to_string(num) + " out of range");
}
if (i == 0)
{
result.push_back(work.at(i));
}
else
{
int separator = work.at(i-1);
if (separator == comma)
{
result.push_back(num);
}
else if (separator == dash)
{
int lastnum = result.back();
if (num > lastnum)
{
for (int j = lastnum + 1; j <= num; ++j)
{
result.push_back(j);
}
}
else
{
for (int j = lastnum - 1; j >= num; --j)
{
result.push_back(j);
}
}
}
else
{
throw std::logic_error(
"INTERNAL ERROR parsing numeric range");
}
}
}
}
catch (std::runtime_error const& e)
{
std::string message;
if (p)
{
message = "error at * in numeric range " +
std::string(range, p - range) + "*" + p + ": " + e.what();
}
else
{
message = "error in numeric range " +
std::string(range) + ": " + e.what();
}
throw std::runtime_error(message);
}
return result;
}
enum encoding_e { e_utf16, e_ascii, e_winansi, e_macroman };
static unsigned char
encode_winansi(unsigned long codepoint)
{
// Use this ugly switch statement to avoid a static, which is not
// thread-safe.
unsigned char ch = '\0';
switch (codepoint)
{
case 0x20ac:
ch = 0x80;
break;
case 0x152:
ch = 0x8c;
break;
case 0x160:
ch = 0x8a;
break;
case 0x178:
ch = 0x9f;
break;
case 0x17d:
ch = 0x8e;
break;
case 0x2022:
ch = 0x95;
break;
case 0x2c6:
ch = 0x88;
break;
case 0x2020:
ch = 0x86;
break;
case 0x2021:
ch = 0x87;
break;
case 0x2026:
ch = 0x85;
break;
case 0x2014:
ch = 0x97;
break;
case 0x2013:
ch = 0x96;
break;
case 0x192:
ch = 0x83;
break;
case 0x2039:
ch = 0x8b;
break;
case 0x203a:
ch = 0x9b;
break;
case 0x153:
ch = 0x9c;
break;
case 0x2030:
ch = 0x89;
break;
case 0x201e:
ch = 0x84;
break;
case 0x201c:
ch = 0x93;
break;
case 0x201d:
ch = 0x94;
break;
case 0x2018:
ch = 0x91;
break;
case 0x2019:
ch = 0x92;
break;
case 0x201a:
ch = 0x82;
break;
case 0x161:
ch = 0x9a;
break;
case 0x303:
ch = 0x98;
break;
case 0x2122:
ch = 0x99;
break;
case 0x17e:
ch = 0x9e;
break;
default:
break;
}
return ch;
}
static unsigned char
encode_macroman(unsigned long codepoint)
{
// Use this ugly switch statement to avoid a static, which is not
// thread-safe.
unsigned char ch = '\0';
switch (codepoint)
{
case 0xc6:
ch = 0xae;
break;
case 0xc1:
ch = 0xe7;
break;
case 0xc2:
ch = 0xe5;
break;
case 0xc4:
ch = 0x80;
break;
case 0xc0:
ch = 0xcb;
break;
case 0xc5:
ch = 0x81;
break;
case 0xc3:
ch = 0xcc;
break;
case 0xc7:
ch = 0x82;
break;
case 0xc9:
ch = 0x83;
break;
case 0xca:
ch = 0xe6;
break;
case 0xcb:
ch = 0xe8;
break;
case 0xc8:
ch = 0xe9;
break;
case 0xcd:
ch = 0xea;
break;
case 0xce:
ch = 0xeb;
break;
case 0xcf:
ch = 0xec;
break;
case 0xcc:
ch = 0xed;
break;
case 0xd1:
ch = 0x84;
break;
case 0x152:
ch = 0xce;
break;
case 0xd3:
ch = 0xee;
break;
case 0xd4:
ch = 0xef;
break;
case 0xd6:
ch = 0x85;
break;
case 0xd2:
ch = 0xf1;
break;
case 0xd8:
ch = 0xaf;
break;
case 0xd5:
ch = 0xcd;
break;
case 0xda:
ch = 0xf2;
break;
case 0xdb:
ch = 0xf3;
break;
case 0xdc:
ch = 0x86;
break;
case 0xd9:
ch = 0xf4;
break;
case 0x178:
ch = 0xd9;
break;
case 0xe1:
ch = 0x87;
break;
case 0xe2:
ch = 0x89;
break;
case 0x301:
ch = 0xab;
break;
case 0xe4:
ch = 0x8a;
break;
case 0xe6:
ch = 0xbe;
break;
case 0xe0:
ch = 0x88;
break;
case 0xe5:
ch = 0x8c;
break;
case 0xe3:
ch = 0x8b;
break;
case 0x306:
ch = 0xf9;
break;
case 0x2022:
ch = 0xa5;
break;
case 0x2c7:
ch = 0xff;
break;
case 0xe7:
ch = 0x8d;
break;
case 0x327:
ch = 0xfc;
break;
case 0xa2:
ch = 0xa2;
break;
case 0x2c6:
ch = 0xf6;
break;
case 0xa9:
ch = 0xa9;
break;
case 0xa4:
ch = 0xdb;
break;
case 0x2020:
ch = 0xa0;
break;
case 0x2021:
ch = 0xe0;
break;
case 0xb0:
ch = 0xa1;
break;
case 0x308:
ch = 0xac;
break;
case 0xf7:
ch = 0xd6;
break;
case 0x307:
ch = 0xfa;
break;
case 0x131:
ch = 0xf5;
break;
case 0xe9:
ch = 0x8e;
break;
case 0xea:
ch = 0x90;
break;
case 0xeb:
ch = 0x91;
break;
case 0xe8:
ch = 0x8f;
break;
case 0x2026:
ch = 0xc9;
break;
case 0x2014:
ch = 0xd1;
break;
case 0x2013:
ch = 0xd0;
break;
case 0xa1:
ch = 0xc1;
break;
case 0xfb01:
ch = 0xde;
break;
case 0xfb02:
ch = 0xdf;
break;
case 0x192:
ch = 0xc4;
break;
case 0x2044:
ch = 0xda;
break;
case 0xdf:
ch = 0xa7;
break;
case 0xab:
ch = 0xc7;
break;
case 0xbb:
ch = 0xc8;
break;
case 0x2039:
ch = 0xdc;
break;
case 0x203a:
ch = 0xdd;
break;
case 0x30b:
ch = 0xfd;
break;
case 0xed:
ch = 0x92;
break;
case 0xee:
ch = 0x94;
break;
case 0xef:
ch = 0x95;
break;
case 0xec:
ch = 0x93;
break;
case 0xac:
ch = 0xc2;
break;
case 0x304:
ch = 0xf8;
break;
case 0x3bc:
ch = 0xb5;
break;
case 0xf1:
ch = 0x96;
break;
case 0xf3:
ch = 0x97;
break;
case 0xf4:
ch = 0x99;
break;
case 0xf6:
ch = 0x9a;
break;
case 0x153:
ch = 0xcf;
break;
case 0x328:
ch = 0xfe;
break;
case 0xf2:
ch = 0x98;
break;
case 0x1d43:
ch = 0xbb;
break;
case 0x1d52:
ch = 0xbc;
break;
case 0xf8:
ch = 0xbf;
break;
case 0xf5:
ch = 0x9b;
break;
case 0xb6:
ch = 0xa6;
break;
case 0xb7:
ch = 0xe1;
break;
case 0x2030:
ch = 0xe4;
break;
case 0xb1:
ch = 0xb1;
break;
case 0xbf:
ch = 0xc0;
break;
case 0x201e:
ch = 0xe3;
break;
case 0x201c:
ch = 0xd2;
break;
case 0x201d:
ch = 0xd3;
break;
case 0x2018:
ch = 0xd4;
break;
case 0x2019:
ch = 0xd5;
break;
case 0x201a:
ch = 0xe2;
break;
case 0xae:
ch = 0xa8;
break;
case 0x30a:
ch = 0xfb;
break;
case 0xa7:
ch = 0xa4;
break;
case 0xa3:
ch = 0xa3;
break;
case 0x303:
ch = 0xf7;
break;
case 0x2122:
ch = 0xaa;
break;
case 0xfa:
ch = 0x9c;
break;
case 0xfb:
ch = 0x9e;
break;
case 0xfc:
ch = 0x9f;
break;
case 0xf9:
ch = 0x9d;
break;
case 0xff:
ch = 0xd8;
break;
case 0xa5:
ch = 0xb4;
break;
default:
break;
}
return ch;
}
static std::string
transcode_utf8(std::string const& utf8_val, encoding_e encoding,
char unknown)
{
std::string result;
if (encoding == e_utf16)
{
result += "\xfe\xff";
}
size_t len = utf8_val.length();
for (size_t i = 0; i < len; ++i)
{
unsigned char ch = static_cast<unsigned char>(utf8_val.at(i));
if (ch < 128)
{
if (encoding == e_utf16)
{
result += QUtil::toUTF16(ch);
}
else
{
result.append(1, ch);
}
}
else
{
size_t bytes_needed = 0;
unsigned bit_check = 0x40;
unsigned char to_clear = 0x80;
while (ch & bit_check)
{
++bytes_needed;
to_clear |= bit_check;
bit_check >>= 1;
}
if (((bytes_needed > 5) || (bytes_needed < 1)) ||
((i + bytes_needed) >= len))
{
if (encoding == e_utf16)
{
result += "\xff\xfd";
}
else
{
result.append(1, unknown);
}
}
else
{
unsigned long codepoint = (ch & ~to_clear);
while (bytes_needed > 0)
{
--bytes_needed;
ch = utf8_val.at(++i);
if ((ch & 0xc0) != 0x80)
{
--i;
codepoint = 0xfffd;
break;
}
codepoint <<= 6;
codepoint += (ch & 0x3f);
}
if (encoding == e_utf16)
{
result += QUtil::toUTF16(codepoint);
}
else
{
ch = '\0';
if (encoding == e_winansi)
{
if ((codepoint >= 160) && (codepoint < 256))
{
ch = static_cast<unsigned char>(codepoint & 0xff);
}
else
{
ch = encode_winansi(codepoint);
}
}
else if (encoding == e_macroman)
{
ch = encode_macroman(codepoint);
}
if (ch == '\0')
{
ch = static_cast<unsigned char>(unknown);
}
result.append(1, ch);
}
}
}
}
return result;
}
std::string
QUtil::utf8_to_utf16(std::string const& utf8)
{
return transcode_utf8(utf8, e_utf16, 0);
}
std::string
QUtil::utf8_to_ascii(std::string const& utf8, char unknown_char)
{
return transcode_utf8(utf8, e_ascii, unknown_char);
}
std::string
QUtil::utf8_to_win_ansi(std::string const& utf8, char unknown_char)
{
return transcode_utf8(utf8, e_winansi, unknown_char);
}
std::string
QUtil::utf8_to_mac_roman(std::string const& utf8, char unknown_char)
{
return transcode_utf8(utf8, e_macroman, unknown_char);
}
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