1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365
|
// -*- related-file-name: "../include/efont/afmparse.hh" -*-
/* afmparse.{cc,hh} -- Adobe Font Metrics parsing
*
* Copyright (c) 1998-2016 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/afmparse.hh>
#include <efont/t1cs.hh>
#include <efont/metrics.hh>
#include <lcdf/strtonum.h>
#include <string.h>
#include <stdarg.h>
#include <ctype.h>
#include <stdlib.h>
#if HAVE_BROKEN_STRTOD
# define strtod good_strtod
#endif
namespace Efont {
static bool name_enders[256];
static char xvalue[256];
AfmParser::AfmParser(Slurper &slurp)
: _slurper(slurp),
_line(0), _pos(0), _length(0)
{
static_initialize();
}
void
AfmParser::trim_end()
{
int l = _length - 1;
while (l >= 0 && isspace(_line[l])) {
_line[l] = 0;
l--;
}
_length = l + 1;
}
void
AfmParser::static_initialize()
{
if (name_enders[(uint8_t)'('])
return;
name_enders[(uint8_t)' '] = name_enders[(uint8_t)'\t']
= name_enders[(uint8_t)'\r'] = name_enders[(uint8_t)'\f']
= name_enders[(uint8_t)'\v'] = name_enders[(uint8_t)'\n']
= name_enders[(uint8_t)'\0'] = name_enders[(uint8_t)'[']
= name_enders[(uint8_t)']'] = name_enders[(uint8_t)'/']
= name_enders[(uint8_t)'('] = name_enders[(uint8_t)')']
= name_enders[(uint8_t)';'] = true;
xvalue[(uint8_t)'0'] = 0;
xvalue[(uint8_t)'1'] = 1;
xvalue[(uint8_t)'2'] = 2;
xvalue[(uint8_t)'3'] = 3;
xvalue[(uint8_t)'4'] = 4;
xvalue[(uint8_t)'5'] = 5;
xvalue[(uint8_t)'6'] = 6;
xvalue[(uint8_t)'7'] = 7;
xvalue[(uint8_t)'8'] = 8;
xvalue[(uint8_t)'9'] = 9;
xvalue[(uint8_t)'a'] = 10;
xvalue[(uint8_t)'b'] = 11;
xvalue[(uint8_t)'c'] = 12;
xvalue[(uint8_t)'d'] = 13;
xvalue[(uint8_t)'e'] = 14;
xvalue[(uint8_t)'f'] = 15;
xvalue[(uint8_t)'A'] = 10;
xvalue[(uint8_t)'B'] = 11;
xvalue[(uint8_t)'C'] = 12;
xvalue[(uint8_t)'D'] = 13;
xvalue[(uint8_t)'E'] = 14;
xvalue[(uint8_t)'F'] = 15;
}
// isall == is total == is all of the string
// %s whitespace-terminated PermString - non-zero-length
// %/s name-terminated PermString - non-zero-length
// %+s rest of line PermString
// %= rest of line/until next `=' PermString; beginning & ending spaces
// elided
// %d integer
// %g number
// %x hex integer
// %b boolean
// %c character
// %< hex string; argument is String *stored
// %. any non-alphanumeric
// ???????????? EOS vs. don't-skip-to-EOS ???????????
#define FAIL(s) do { _message = s; return 0; } while (0)
unsigned char *
AfmParser::vis(const char *formatsigned, va_list valist)
{
const unsigned char *format = (const unsigned char *)formatsigned;
unsigned char *str = _pos;
// Oftentimes, we'll get a keyword first. So handle that simple case
// with a tight loop for (possibly) better performance and slightly different
// semantics. (A keyword that comes first in the format must be followed
// by a nonalphanumeric in the input to match.)
if (isalpha(*format)) {
bool ok = true;
for (; *format && *format != ' ' && ok; format++, str++) {
assert(isalnum(*format));
if (*format != *str) ok = false;
}
if (!ok || isalnum(*str)) {
if (_message) return 0;
_fail_field = -1;
FAIL("keyword mismatch");
}
}
int fplus, fslash;
_fail_field = 0;
_message = PermString();
while (1) {
switch (*format) {
/* - - - - - - - - percent specifications - - - - - - - */
case '%':
fplus = fslash = 0;
_fail_field++;
percentspec:
switch (*++format) {
// FLAGS
case '+':
fplus++;
goto percentspec;
case '/':
fslash++;
goto percentspec;
case '%':
goto matchchar;
case 'b':
case 's': {
int len;
if (fplus)
len = strlen((char *)str);
else if (fslash) {
for (len = 0; !name_enders[ str[len] ]; len++)
;
if (len == 0)
FAIL("should be a string");
} else {
for (len = 0; !isspace(str[len]) && str[len]; len++)
;
if (len == 0)
FAIL("should be a string");
}
PermString s = PermString((char *)str, len);
str += len;
// Now we have the string. What to do with it? Depends on format.
if (*format == 'b') {
bool *bstore = va_arg(valist, bool *);
if (s == "true") {
if (bstore) *bstore = 1;
} else if (s == "false") {
if (bstore) *bstore = 0;
} else
FAIL("should be `true' or `false'");
} else {
PermString *sstore = va_arg(valist, PermString *);
if (sstore) *sstore = s;
}
break;
}
case '(': {
if (*str++ != '(') FAIL("should be a parenthesized string");
unsigned char *last = str;
int paren_level = 0;
while (*last && paren_level >= 0) {
if (*last == '(') paren_level++;
if (*last == ')') paren_level--;
last++;
}
if (paren_level >= 0) FAIL("had unbalanced parentheses");
PermString *sstore = va_arg(valist, PermString *);
if (sstore) *sstore = PermString((char *)str, last - str - 1);
str = last;
break;
}
case 'd':
case 'i': {
union { unsigned char *uc; char *c; } new_str;
int v = strtol((char *)str, &new_str.c, 10);
if (new_str.uc == str) FAIL("should be an integer");
str = new_str.uc;
int *istore = va_arg(valist, int *);
if (istore) *istore = v;
break;
}
case 'x': {
union { unsigned char *uc; char *c; } new_str;
int v = strtol((char *)str, &new_str.c, 16);
if (new_str.uc == str) FAIL("should be a hex integer");
str = new_str.uc;
int *istore = va_arg(valist, int *);
if (istore) *istore = v;
break;
}
case 'e':
case 'f':
case 'g': {
union { unsigned char *uc; char *c; } new_str;
double v = strtonumber((char *)str, &new_str.c);
if (v < MIN_KNOWN_DOUBLE) v = MIN_KNOWN_DOUBLE;
if (new_str.uc == str) FAIL("should be a real number");
str = new_str.uc;
double *dstore = va_arg(valist, double *);
if (dstore) *dstore = v;
break;
}
case '<': {
unsigned char *endbrack =
(unsigned char *)strchr((char *)str, '>');
int n = (endbrack ? endbrack - (str + 1) : 0);
if (!endbrack || n % 2 != 0)
FAIL("should be hex values in <angle brackets>");
String s = String::make_uninitialized(n/2);
unsigned char *data = s.mutable_udata();
str++;
while (*str != '>') {
if (isxdigit(str[0]) && isxdigit(str[1])) {
*data++ = xvalue[str[0]] * 16 + xvalue[str[1]];
str += 2;
} else
FAIL("had non-hex digits in the angle brackets");
}
str++;
if (String *datastore = va_arg(valist, String *))
*datastore = s;
break;
}
default:
assert(0 /* internal error: bad % */);
FAIL("");
}
break;
/* - - - - - - - - end percent specifications - - - - - - - */
case ' ':
if (!isspace(*str))
FAIL("should be followed by whitespace");
/* FALLTHRU */
case '-':
while (isspace(*str)) str++;
break;
case 0:
// always eat space at end of format
while (isspace(*str)) str++;
return str;
default:
matchchar:
if (*str++ != *format)
FAIL(permprintf("- expected `%c'", *format));
break;
}
format++;
}
}
bool
AfmParser::isall(const char *format, ...)
{
va_list valist;
va_start(valist, format);
unsigned char *new_pos = vis(format, valist);
va_end(valist);
if (new_pos && *new_pos == 0) {
_pos = new_pos;
return 1;
} else
return 0;
}
bool
AfmParser::is(const char *format, ...)
{
va_list valist;
va_start(valist, format);
unsigned char *new_pos = vis(format, valist);
va_end(valist);
if (new_pos) {
_pos = new_pos;
return 1;
} else
return 0;
}
PermString
AfmParser::keyword() const
{
const char *f = (const char *)_pos;
while (isspace((unsigned char) *f))
f++;
const char *l = f;
while (isalnum((unsigned char) *l) || *l == '_')
l++;
return PermString(f, l - f);
}
void
AfmParser::skip_until(unsigned char c)
{
while (*_pos && *_pos != c)
_pos++;
}
}
|