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Diffstat (limited to 'Build/source/texk/lcdf-typetools/lcdf-typetools-2.103/libefont/t1rw.cc')
-rw-r--r-- | Build/source/texk/lcdf-typetools/lcdf-typetools-2.103/libefont/t1rw.cc | 613 |
1 files changed, 613 insertions, 0 deletions
diff --git a/Build/source/texk/lcdf-typetools/lcdf-typetools-2.103/libefont/t1rw.cc b/Build/source/texk/lcdf-typetools/lcdf-typetools-2.103/libefont/t1rw.cc new file mode 100644 index 00000000000..846297e6b67 --- /dev/null +++ b/Build/source/texk/lcdf-typetools/lcdf-typetools-2.103/libefont/t1rw.cc @@ -0,0 +1,613 @@ +// -*- related-file-name: "../include/efont/t1rw.hh" -*- + +/* t1rw.{cc,hh} -- Type 1 font reading and writing + * + * Copyright (c) 1998-2012 Eddie Kohler + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. This program is distributed in the hope that it will be + * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General + * Public License for more details. + */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif +#include <efont/t1rw.hh> +#include <efont/t1cs.hh> +#include <lcdf/straccum.hh> +#include <stdlib.h> +#include <ctype.h> +#include <string.h> +namespace Efont { + +unsigned char Type1Reader::xvalue_store[257]; +unsigned char *Type1Reader::xvalue = &Type1Reader::xvalue_store[1]; + +void +Type1Reader::static_initialize() +{ + if (xvalue['A']) + return; + // rely on static data being initialized to 0 + xvalue['0'] = 0; xvalue['1'] = 1; xvalue['2'] = 2; xvalue['3'] = 3; + xvalue['4'] = 4; xvalue['5'] = 5; xvalue['6'] = 6; xvalue['7'] = 7; + xvalue['8'] = 8; xvalue['9'] = 9; + xvalue['A'] = 10; xvalue['B'] = 11; xvalue['C'] = 12; xvalue['D'] = 13; + xvalue['E'] = 14; xvalue['F'] = 15; + xvalue['a'] = 10; xvalue['b'] = 11; xvalue['c'] = 12; xvalue['d'] = 13; + xvalue['e'] = 14; xvalue['f'] = 15; +} + + +Type1Reader::Type1Reader() + : _data(new unsigned char[DATA_SIZE]), _len(0), _pos(0), + _ungot(-1), _eexec(false) +{ + static_initialize(); +} + +Type1Reader::~Type1Reader() +{ + delete[] _data; +} + + +void +Type1Reader::set_charstring_definer(PermString x) +{ + _charstring_definer = x; +} + +void +Type1Reader::switch_eexec(bool on, unsigned char *data, int len) +{ + if (on) { + if (_pos < len + 3) { + unsigned char *new_data = new unsigned char[len + 3 + DATA_SIZE]; + assert(_len <= DATA_SIZE); + memcpy(new_data + len + 3, _data + _pos, _len - _pos); + _len = len + 3 + _len - _pos; + _pos = len + 3; + delete[] _data; + _data = new_data; + } + int original_pos = _pos; + // don't forget _ungot!! + if (_ungot >= 0) + _data[--_pos] = _ungot, _ungot = -1; + if (_crlf == 0 || _crlf == 2) + _data[--_pos] = '\n'; + if (_crlf == 1 || _crlf == 2) + _data[--_pos] = '\r'; + memcpy(_data + _pos - len, data, len); + _pos -= len; + start_eexec(original_pos - _pos); + } + _eexec = on; +} + + +int +Type1Reader::more_data() +{ + _pos = 0; + _len = more_data(_data, DATA_SIZE); + if (_len < 0) + return -1; + else + return _data[_pos++]; +} + + +inline int +Type1Reader::get_base() +{ + if (_pos >= _len) + return more_data(); + else + return _data[_pos++]; +} + + +inline int +Type1Reader::eexec(int c) +{ + unsigned char answer = (unsigned char)(c ^ (_r >> 8)); + _r = (((unsigned char)c + _r) * t1C1 + t1C2) & 0xFFFF; + return answer; +} + + +int +Type1Reader::ascii_eexec_get() +{ + int d1 = get_base(); + while (isspace(d1)) + d1 = get_base(); + + int d2 = get_base(); + while (isspace(d2)) + d2 = get_base(); + if (d2 < 0) + return -1; + + return eexec((xvalue[d1] << 4) | (xvalue[d2])); +} + + +inline int +Type1Reader::get() +{ + if (!_eexec) + return get_base(); + + else if (_binary_eexec) { + int c = get_base(); + return c < 0 ? c : eexec(c); + + } else + return ascii_eexec_get(); +} + + +void +Type1Reader::start_eexec(int initial_ascii) +{ + /* God damn this _ungot thing!! It makes sense not to check it on every + char fetch, since it can only be set at the end of next_line; therefore, + only the first get() into a user-visible function might need to check + _ungot. The problem is I forgot start_eexec() was such a function! */ + int c = _ungot < 0 ? get_base() : _ungot; + initial_ascii--; + _ungot = -1; + + /* Strictly speaking, I should look for whitespace even in binary sections + of PFB fonts; but it turns out some PFBs would be unreadable with that + pedantic rule. */ + while (isspace(c) && (initial_ascii >= 0 || !preserve_whitespace())) + c = get_base(), initial_ascii--; + + /* Differentiate between ASCII eexec and binary eexec. */ + int rand_bytes[4]; + _binary_eexec = false; + for (int i = 0; i < 4; i++) { + if (i) + c = get_base(); + rand_bytes[i] = c; + if (!isxdigit(c)) + _binary_eexec = true; + } + + _r = t1R_ee; + if (_binary_eexec) + for (int i = 0; i < 4; i++) + eexec(rand_bytes[i]); + else { + for (int i = 0; i < 2; i++) { + c = xvalue[rand_bytes[i*2]] * 16 + xvalue[rand_bytes[i*2+1]]; + eexec(c); + } + ascii_eexec_get(); + ascii_eexec_get(); + } +} + + +bool +Type1Reader::test_charstring(StringAccum &str) +{ + /* PERFORMANCE NOTE: This function is definitely a bottleneck. Making it + more efficient cut time by about 40%. */ + + if (!_charstring_definer) + return false; + if (_charstring_len >= 0) + return str.length() <= _charstring_start + _charstring_len; + + str.append('\0'); // protect against running off end of string + char *s = str.data(); + char *start; + while (*s == ' ') + s++; + + if (s[0] == '/') + s++; + else if (s[0] == 'd' && s[1] == 'u' && s[2] == 'p' && isspace((unsigned char) s[3])) { + s += 4; + // 17.Jan.2000 -- some fonts have extra space here. + while (isspace((unsigned char) *s)) + s++; + } else + goto not_charstring; + + // Force one literal space rather than isspace(). + // Why? Consistency: we force 1 literal space around _charstring_definer. + while (*s != ' ' && *s) + s++; + if (*s++ != ' ' || !isdigit((unsigned char) *s)) + goto not_charstring; + start = s; + s++; + while (*s != ' ' && *s) + s++; + if (strncmp(s, _charstring_definer.c_str(), _charstring_definer.length()) != 0) + goto not_charstring; + + _charstring_len = strtol(start, 0, 10); + _charstring_start = (s - str.data()) + _charstring_definer.length(); + str.pop_back(); + return str.length() <= _charstring_start + _charstring_len; + + not_charstring: + str.pop_back(); + return false; +} + + +/* PERFORMANCE NOTE: All kinds of speedup tricks tried with eexec -- buffering + (doing eexec processing at more_data time), etc., and all this stuff -- and + found to have essentially zero effect for PFB fonts. Now, it might be + effective for PFAs; but who cares? I hate PFAs. */ + +bool +Type1Reader::next_line(StringAccum &s) +{ + if (_len < 0) + return false; + + // Can't be a charstring if incoming accumulator has nonzero length. + _charstring_start = 0; + _charstring_len = (s.length() > 0 ? 0 : -1); + + int first_char = _ungot < 0 ? get() : _ungot; + _ungot = -1; + + for (int c = first_char; c >= 0; c = get()) + switch (c) { + + case '\n': + if (test_charstring(s)) + goto normal; + else { + _crlf = 0; + goto done; + } + + case '\r': + // check for \r\n (counts as only one line ending) + if (test_charstring(s)) + goto normal; + c = get(); + if (c != '\n' || preserve_whitespace()) + _ungot = c, _crlf = 1; + else + _crlf = 2; + goto done; + + normal: + default: + s.append((char)c); + break; + + } + + done: + return true; +} + + +int +Type1Reader::get_data(unsigned char *data, int len) +{ + if (_len < 0) + return -1; + if (len <= 0) + return 0; + + int pos = 0; + if (_ungot >= 0) { + *data++ = _ungot; + pos++; + _ungot = -1; + } + + for (; pos < len; pos++) { + int c = get(); + if (c < 0) + break; + *data++ = c; + } + + return pos; +} + + +/***** + * Type1PFAReader + **/ + +Type1PFAReader::Type1PFAReader(FILE *f) + : _f(f) +{ +} + +int +Type1PFAReader::more_data(unsigned char *data, int len) +{ + size_t size = fread(data, 1, len, _f); + return size ? (int)size : -1; +} + + +/***** + * Type1PFBReader + **/ + +Type1PFBReader::Type1PFBReader(FILE *f) + : _f(f), _binary(false), _left(0) +{ +} + +int +Type1PFBReader::more_data(unsigned char *data, int len) +{ + while (_left == 0) { + int c = getc(_f); + if (c != 128) + return -1; + + c = getc(_f); + if (c == 3 || c < 1 || c > 3) + return -1; + _binary = (c == 2); + + _left = getc(_f); + _left |= getc(_f) << 8; + _left |= getc(_f) << 16; + _left |= getc(_f) << 24; + } + + if (_left < 0) + return -1; + + if (len > _left) + len = _left; + _left -= len; + + return fread(data, 1, len, _f); +} + +bool +Type1PFBReader::preserve_whitespace() const +{ + return _binary; +} + + +/***** + * Type1SubsetReader + **/ + +Type1SubsetReader::Type1SubsetReader(Type1Reader *r, int left) + : _reader(r), _left(left) +{ +} + +int +Type1SubsetReader::more_data(unsigned char *data, int len) +{ + if (_left <= 0) + return -1; + if (len > _left) + len = _left; + int how_much = _reader->get_data(data, len); + if (how_much > 0) + _left -= how_much; + return how_much; +} + +bool +Type1SubsetReader::preserve_whitespace() const +{ + return _reader->preserve_whitespace(); +} + + +/***** + * Writer + **/ + +Type1Writer::Type1Writer() + : _buf(new unsigned char[BufSize]), _pos(0), + _eexec(false), _eexec_start(-1), _eexec_end(-1), _lenIV(4) +{ +} + + +Type1Writer::~Type1Writer() +{ + assert(!_pos); + delete[] _buf; +} + + +inline unsigned char +Type1Writer::eexec(int p) +{ + unsigned char c = ((unsigned char)p ^ (_r >> 8)) & 0xFF; + _r = ((c + _r) * t1C1 + t1C2) & 0xFFFF; + return c; +} + + +void +Type1Writer::flush() +{ + local_flush(); +} + + +/* PERFORMANCE NOTE: Doing eexec processing during flush -- which streamlines + code for the print() methods -- seems to save some time (4-5%). It also + makes write performance more consistent. But I have mixed feelings. */ + +void +Type1Writer::local_flush() +{ + if (_eexec_start >= 0 && _eexec_end < 0) + _eexec_end = _pos; + for (int p = _eexec_start; p < _eexec_end; p++) + _buf[p] = eexec(_buf[p]); + print0(_buf, _pos); + _pos = 0; + _eexec_start = _eexec ? 0 : -1; + _eexec_end = -1; +} + + +void +Type1Writer::print(const char *s, int n) +{ + while (n > 0) { + if (_pos >= BufSize) + local_flush(); + int copy = BufSize - _pos; + if (copy > n) copy = n; + memcpy(_buf + _pos, s, copy); + _pos += copy; + s += copy; + n -= copy; + } +} + + +Type1Writer & +Type1Writer::operator<<(int x) +{ + char str[128]; + sprintf(str, "%d", x); + print(str, strlen(str)); + return *this; +} + + +Type1Writer & +Type1Writer::operator<<(double x) +{ + char str[256]; + sprintf(str, "%g", x); + print(str, strlen(str)); + return *this; +} + + +void +Type1Writer::switch_eexec(bool on) +{ + _eexec = on; + if (_eexec) { + _eexec_start = _pos; + _r = t1R_ee; + print("SUCK", 4); + } else + _eexec_end = _pos; +} + + +/***** + * Type1PFAWriter + **/ + +Type1PFAWriter::Type1PFAWriter(FILE *f) + : _f(f), _hex_line(0) +{ +} + +Type1PFAWriter::~Type1PFAWriter() +{ + flush(); +} + + +void +Type1PFAWriter::switch_eexec(bool on) +{ + flush(); + _hex_line = 0; + Type1Writer::switch_eexec(on); +} + +void +Type1PFAWriter::print0(const unsigned char *c, int l) +{ + if (eexecing()) { + const char *hex = "0123456789ABCDEF"; + for (; l; c++, l--) { + putc(hex[*c / 16], _f); + putc(hex[*c % 16], _f); + if (++_hex_line == 39) { + putc('\n', _f); + _hex_line = 0; + } + } + } else { + ssize_t result = fwrite(c, 1, l, _f); + (void) result; + } +} + + +/***** + * Type1PFBWriter + **/ + +Type1PFBWriter::Type1PFBWriter(FILE *f) + : _f(f), _binary(false) +{ +} + +Type1PFBWriter::~Type1PFBWriter() +{ + flush(); + fputc(128, _f); + fputc(3, _f); +} + +void +Type1PFBWriter::flush() +{ + Type1Writer::flush(); + if (_save.length()) { + fputc(128, _f); + fputc(_binary ? 2 : 1, _f); + long l = _save.length(); + fputc(l & 0xFF, _f); + fputc((l >> 8) & 0xFF, _f); + fputc((l >> 16) & 0xFF, _f); + fputc((l >> 24) & 0xFF, _f); + ssize_t result = fwrite(_save.data(), 1, _save.length(), _f); + (void) result; + _save.clear(); + } +} + +void +Type1PFBWriter::switch_eexec(bool on) +{ + flush(); + Type1Writer::switch_eexec(on); + _binary = on; +} + +void +Type1PFBWriter::print0(const unsigned char *c, int l) +{ + char *m = _save.extend(l); + memcpy(m, c, l); +} + +} |