David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 1 | /***************************************************************************/ |
| 2 | /* */ |
| 3 | /* cffparse.c */ |
| 4 | /* */ |
| 5 | /* CFF token stream parser (body) */ |
| 6 | /* */ |
| 7 | /* Copyright 1996-2000 by */ |
| 8 | /* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
| 9 | /* */ |
| 10 | /* This file is part of the FreeType project, and may only be used, */ |
| 11 | /* modified, and distributed under the terms of the FreeType project */ |
| 12 | /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
| 13 | /* this file you indicate that you have read the license and */ |
| 14 | /* understand and accept it fully. */ |
| 15 | /* */ |
| 16 | /***************************************************************************/ |
| 17 | |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 18 | |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 19 | #include <ft2build.h> |
David Turner | 8d3a401 | 2001-03-20 11:14:24 +0000 | [diff] [blame] | 20 | #include "cffparse.h" |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 21 | #include FT_INTERNAL_STREAM_H |
| 22 | |
Werner Lemberg | 1f7f0e8 | 2001-06-06 17:30:41 +0000 | [diff] [blame] | 23 | #include "cfferrs.h" |
| 24 | |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 25 | |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 26 | /*************************************************************************/ |
| 27 | /* */ |
| 28 | /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ |
| 29 | /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ |
| 30 | /* messages during execution. */ |
| 31 | /* */ |
| 32 | #undef FT_COMPONENT |
Tom Kacvinsky | 8d1f604 | 2001-01-03 00:21:59 +0000 | [diff] [blame] | 33 | #define FT_COMPONENT trace_cffparse |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 34 | |
| 35 | |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 36 | enum |
| 37 | { |
| 38 | cff_kind_none = 0, |
| 39 | cff_kind_num, |
| 40 | cff_kind_fixed, |
| 41 | cff_kind_string, |
| 42 | cff_kind_bool, |
| 43 | cff_kind_delta, |
| 44 | cff_kind_callback, |
| 45 | |
| 46 | cff_kind_max /* do not remove */ |
| 47 | }; |
| 48 | |
| 49 | |
| 50 | /* now generate handlers for the most simple fields */ |
| 51 | typedef FT_Error (*CFF_Field_Reader)( CFF_Parser* parser ); |
| 52 | |
| 53 | typedef struct CFF_Field_Handler_ |
| 54 | { |
| 55 | int kind; |
| 56 | int code; |
| 57 | FT_UInt offset; |
| 58 | FT_Byte size; |
| 59 | CFF_Field_Reader reader; |
| 60 | FT_UInt array_max; |
| 61 | FT_UInt count_offset; |
| 62 | |
| 63 | } CFF_Field_Handler; |
| 64 | |
| 65 | |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 66 | FT_LOCAL_DEF |
| 67 | void CFF_Parser_Init( CFF_Parser* parser, |
| 68 | FT_UInt code, |
| 69 | void* object ) |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 70 | { |
| 71 | MEM_Set( parser, 0, sizeof ( *parser ) ); |
| 72 | |
| 73 | parser->top = parser->stack; |
| 74 | parser->object_code = code; |
| 75 | parser->object = object; |
| 76 | } |
| 77 | |
| 78 | |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 79 | /* read an integer */ |
| 80 | static |
| 81 | FT_Long cff_parse_integer( FT_Byte* start, |
| 82 | FT_Byte* limit ) |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 83 | { |
| 84 | FT_Byte* p = start; |
| 85 | FT_Int v = *p++; |
| 86 | FT_Long val = 0; |
| 87 | |
| 88 | |
| 89 | if ( v == 28 ) |
| 90 | { |
| 91 | if ( p + 2 > limit ) |
| 92 | goto Bad; |
| 93 | |
| 94 | val = (FT_Short)( ( (FT_Int)p[0] << 8 ) | p[1] ); |
| 95 | p += 2; |
| 96 | } |
| 97 | else if ( v == 29 ) |
| 98 | { |
| 99 | if ( p + 4 > limit ) |
| 100 | goto Bad; |
| 101 | |
| 102 | val = ( (FT_Long)p[0] << 24 ) | |
| 103 | ( (FT_Long)p[1] << 16 ) | |
| 104 | ( (FT_Long)p[2] << 8 ) | |
| 105 | p[3]; |
| 106 | p += 4; |
| 107 | } |
| 108 | else if ( v < 247 ) |
| 109 | { |
| 110 | val = v - 139; |
| 111 | } |
| 112 | else if ( v < 251 ) |
| 113 | { |
| 114 | if ( p + 1 > limit ) |
| 115 | goto Bad; |
| 116 | |
| 117 | val = ( v - 247 ) * 256 + p[0] + 108; |
| 118 | p++; |
| 119 | } |
| 120 | else |
| 121 | { |
| 122 | if ( p + 1 > limit ) |
| 123 | goto Bad; |
| 124 | |
| 125 | val = -( v - 251 ) * 256 - p[0] - 108; |
| 126 | p++; |
| 127 | } |
| 128 | |
| 129 | Exit: |
| 130 | return val; |
| 131 | |
| 132 | Bad: |
| 133 | val = 0; |
| 134 | goto Exit; |
| 135 | } |
| 136 | |
| 137 | |
| 138 | /* read a real */ |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 139 | static |
| 140 | FT_Fixed cff_parse_real( FT_Byte* start, |
| 141 | FT_Byte* limit, |
| 142 | FT_Int power_ten ) |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 143 | { |
| 144 | FT_Byte* p = start; |
| 145 | FT_Long num, divider, result, exp; |
| 146 | FT_Int sign = 0, exp_sign = 0; |
David Turner | 8edbcab | 2001-06-19 08:28:24 +0000 | [diff] [blame^] | 147 | FT_UInt nib; |
| 148 | FT_UInt phase; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 149 | |
| 150 | |
| 151 | result = 0; |
| 152 | num = 0; |
| 153 | divider = 1; |
| 154 | |
| 155 | /* first of all, read the integer part */ |
| 156 | phase = 4; |
| 157 | |
| 158 | for (;;) |
| 159 | { |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 160 | /* If we entered this iteration with phase == 4, we need to */ |
| 161 | /* read a new byte. This also skips past the intial 0x1E. */ |
| 162 | if ( phase ) |
| 163 | { |
| 164 | p++; |
| 165 | |
| 166 | /* Make sure we don't read past the end. */ |
| 167 | if ( p >= limit ) |
| 168 | goto Bad; |
| 169 | } |
| 170 | |
| 171 | /* Get the nibble. */ |
| 172 | nib = ( p[0] >> phase ) & 0xF; |
| 173 | phase = 4 - phase; |
| 174 | |
| 175 | if ( nib == 0xE ) |
| 176 | sign = 1; |
| 177 | else if ( nib > 9 ) |
| 178 | break; |
| 179 | else |
| 180 | result = result * 10 + nib; |
| 181 | } |
| 182 | |
| 183 | /* read decimal part, if any */ |
| 184 | if ( nib == 0xa ) |
| 185 | for (;;) |
| 186 | { |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 187 | /* If we entered this iteration with phase == 4, we need */ |
| 188 | /* to read a new byte. */ |
| 189 | if ( phase ) |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 190 | { |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 191 | p++; |
| 192 | |
| 193 | /* Make sure we don't read past the end. */ |
| 194 | if ( p >= limit ) |
| 195 | goto Bad; |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 196 | } |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 197 | |
| 198 | /* Get the nibble. */ |
| 199 | nib = ( p[0] >> phase ) & 0xF; |
| 200 | phase = 4 - phase; |
| 201 | if ( nib >= 10 ) |
| 202 | break; |
| 203 | |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 204 | if ( divider < 10000000L ) |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 205 | { |
| 206 | num = num * 10 + nib; |
| 207 | divider *= 10; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | /* read exponent, if any */ |
| 212 | if ( nib == 12 ) |
| 213 | { |
| 214 | exp_sign = 1; |
| 215 | nib = 11; |
| 216 | } |
| 217 | |
| 218 | if ( nib == 11 ) |
| 219 | { |
| 220 | exp = 0; |
| 221 | |
| 222 | for (;;) |
| 223 | { |
| 224 | /* If we entered this iteration with phase == 4, we need */ |
| 225 | /* to read a new byte. */ |
| 226 | if ( phase ) |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 227 | { |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 228 | p++; |
| 229 | |
| 230 | /* Make sure we don't read past the end. */ |
| 231 | if ( p >= limit ) |
| 232 | goto Bad; |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 233 | } |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 234 | |
| 235 | /* Get the nibble. */ |
| 236 | nib = ( p[0] >> phase ) & 0xF; |
| 237 | phase = 4 - phase; |
| 238 | if ( nib >= 10 ) |
| 239 | break; |
| 240 | |
| 241 | exp = exp * 10 + nib; |
| 242 | } |
| 243 | |
| 244 | if ( exp_sign ) |
| 245 | exp = -exp; |
| 246 | |
| 247 | power_ten += exp; |
| 248 | } |
| 249 | |
| 250 | /* raise to power of ten if needed */ |
| 251 | while ( power_ten > 0 ) |
| 252 | { |
| 253 | result = result * 10; |
| 254 | num = num * 10; |
| 255 | |
| 256 | power_ten--; |
| 257 | } |
| 258 | |
| 259 | while ( power_ten < 0 ) |
| 260 | { |
| 261 | result = result / 10; |
| 262 | divider = divider * 10; |
| 263 | |
| 264 | power_ten++; |
| 265 | } |
| 266 | |
Tom Kacvinsky | c27cd28 | 2001-02-07 01:11:54 +0000 | [diff] [blame] | 267 | /* Move the integer part into the high 16 bits. */ |
| 268 | result <<= 16; |
| 269 | |
| 270 | /* Place the decimal part into the low 16 bits. */ |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 271 | if ( num ) |
Tom Kacvinsky | c27cd28 | 2001-02-07 01:11:54 +0000 | [diff] [blame] | 272 | result |= FT_DivFix( num, divider ); |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 273 | |
| 274 | if ( sign ) |
| 275 | result = -result; |
| 276 | |
| 277 | Exit: |
| 278 | return result; |
| 279 | |
| 280 | Bad: |
| 281 | result = 0; |
| 282 | goto Exit; |
| 283 | } |
| 284 | |
| 285 | |
| 286 | /* read a number, either integer or real */ |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 287 | static |
| 288 | FT_Long cff_parse_num( FT_Byte** d ) |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 289 | { |
| 290 | return ( **d == 30 ? ( cff_parse_real ( d[0], d[1], 0 ) >> 16 ) |
| 291 | : cff_parse_integer( d[0], d[1] ) ); |
| 292 | } |
| 293 | |
| 294 | |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 295 | /* read a floating point number, either integer or real */ |
| 296 | static |
| 297 | FT_Fixed cff_parse_fixed( FT_Byte** d ) |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 298 | { |
| 299 | return ( **d == 30 ? cff_parse_real ( d[0], d[1], 0 ) |
| 300 | : cff_parse_integer( d[0], d[1] ) << 16 ); |
| 301 | } |
| 302 | |
Tom Kacvinsky | c27cd28 | 2001-02-07 01:11:54 +0000 | [diff] [blame] | 303 | /* read a floating point number, either integer or real, */ |
| 304 | /* but return 1000 times the number read in. */ |
| 305 | static |
Werner Lemberg | 500dc85 | 2001-02-10 17:45:01 +0000 | [diff] [blame] | 306 | FT_Fixed cff_parse_fixed_thousand( FT_Byte** d ) |
Tom Kacvinsky | c27cd28 | 2001-02-07 01:11:54 +0000 | [diff] [blame] | 307 | { |
Werner Lemberg | 500dc85 | 2001-02-10 17:45:01 +0000 | [diff] [blame] | 308 | return **d == |
| 309 | 30 ? cff_parse_real ( d[0], d[1], 3 ) |
| 310 | : (FT_Fixed)FT_MulFix( cff_parse_integer( d[0], d[1] ) << 16, 1000 ); |
Tom Kacvinsky | c27cd28 | 2001-02-07 01:11:54 +0000 | [diff] [blame] | 311 | } |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 312 | |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 313 | static |
| 314 | FT_Error cff_parse_font_matrix( CFF_Parser* parser ) |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 315 | { |
| 316 | CFF_Font_Dict* dict = (CFF_Font_Dict*)parser->object; |
| 317 | FT_Matrix* matrix = &dict->font_matrix; |
| 318 | FT_Vector* offset = &dict->font_offset; |
Tom Kacvinsky | c27cd28 | 2001-02-07 01:11:54 +0000 | [diff] [blame] | 319 | FT_UShort* upm = &dict->units_per_em; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 320 | FT_Byte** data = parser->stack; |
| 321 | FT_Error error; |
Tom Kacvinsky | a05c02c | 2000-12-24 09:57:28 +0000 | [diff] [blame] | 322 | FT_Fixed temp; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 323 | |
Werner Lemberg | 6b76663 | 2000-12-30 22:14:58 +0000 | [diff] [blame] | 324 | |
Tom Kacvinsky | 8d1f604 | 2001-01-03 00:21:59 +0000 | [diff] [blame] | 325 | error = CFF_Err_Stack_Underflow; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 326 | |
| 327 | if ( parser->top >= parser->stack + 6 ) |
| 328 | { |
Tom Kacvinsky | c27cd28 | 2001-02-07 01:11:54 +0000 | [diff] [blame] | 329 | matrix->xx = cff_parse_fixed_thousand( data++ ); |
| 330 | matrix->yx = cff_parse_fixed_thousand( data++ ); |
| 331 | matrix->xy = cff_parse_fixed_thousand( data++ ); |
| 332 | matrix->yy = cff_parse_fixed_thousand( data++ ); |
| 333 | offset->x = cff_parse_fixed_thousand( data++ ); |
| 334 | offset->y = cff_parse_fixed_thousand( data ); |
Tom Kacvinsky | a05c02c | 2000-12-24 09:57:28 +0000 | [diff] [blame] | 335 | |
| 336 | temp = ABS( matrix->yy ); |
| 337 | |
David Turner | 09d55ce | 2001-05-11 18:08:58 +0000 | [diff] [blame] | 338 | *upm = (FT_UShort)FT_DivFix( 0x10000L, FT_DivFix( temp, 1000 ) ); |
Tom Kacvinsky | c27cd28 | 2001-02-07 01:11:54 +0000 | [diff] [blame] | 339 | |
Tom Kacvinsky | a05c02c | 2000-12-24 09:57:28 +0000 | [diff] [blame] | 340 | if ( temp != 0x10000L ) |
| 341 | { |
| 342 | matrix->xx = FT_DivFix( matrix->xx, temp ); |
| 343 | matrix->yx = FT_DivFix( matrix->yx, temp ); |
| 344 | matrix->xy = FT_DivFix( matrix->xy, temp ); |
| 345 | matrix->yy = FT_DivFix( matrix->yy, temp ); |
| 346 | offset->x = FT_DivFix( offset->x, temp ); |
| 347 | offset->y = FT_DivFix( offset->y, temp ); |
| 348 | } |
| 349 | |
| 350 | /* note that the offsets must be expressed in integer font units */ |
| 351 | offset->x >>= 16; |
| 352 | offset->y >>= 16; |
| 353 | |
Tom Kacvinsky | 8d1f604 | 2001-01-03 00:21:59 +0000 | [diff] [blame] | 354 | error = CFF_Err_Ok; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 355 | } |
| 356 | |
| 357 | return error; |
| 358 | } |
| 359 | |
| 360 | |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 361 | static |
| 362 | FT_Error cff_parse_font_bbox( CFF_Parser* parser ) |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 363 | { |
| 364 | CFF_Font_Dict* dict = (CFF_Font_Dict*)parser->object; |
| 365 | FT_BBox* bbox = &dict->font_bbox; |
| 366 | FT_Byte** data = parser->stack; |
| 367 | FT_Error error; |
| 368 | |
| 369 | |
Tom Kacvinsky | 8d1f604 | 2001-01-03 00:21:59 +0000 | [diff] [blame] | 370 | error = CFF_Err_Stack_Underflow; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 371 | |
| 372 | if ( parser->top >= parser->stack + 4 ) |
| 373 | { |
Tom Kacvinsky | c24eff8 | 2001-03-17 19:01:25 +0000 | [diff] [blame] | 374 | bbox->xMin = FT_RoundFix( cff_parse_fixed( data++ ) ); |
| 375 | bbox->yMin = FT_RoundFix( cff_parse_fixed( data++ ) ); |
| 376 | bbox->xMax = FT_RoundFix( cff_parse_fixed( data++ ) ); |
| 377 | bbox->yMax = FT_RoundFix( cff_parse_fixed( data ) ); |
Tom Kacvinsky | 8d1f604 | 2001-01-03 00:21:59 +0000 | [diff] [blame] | 378 | error = CFF_Err_Ok; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 379 | } |
| 380 | |
| 381 | return error; |
| 382 | } |
| 383 | |
| 384 | |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 385 | static |
| 386 | FT_Error cff_parse_private_dict( CFF_Parser* parser ) |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 387 | { |
| 388 | CFF_Font_Dict* dict = (CFF_Font_Dict*)parser->object; |
| 389 | FT_Byte** data = parser->stack; |
| 390 | FT_Error error; |
| 391 | |
| 392 | |
Tom Kacvinsky | 8d1f604 | 2001-01-03 00:21:59 +0000 | [diff] [blame] | 393 | error = CFF_Err_Stack_Underflow; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 394 | |
| 395 | if ( parser->top >= parser->stack + 2 ) |
| 396 | { |
| 397 | dict->private_size = cff_parse_num( data++ ); |
| 398 | dict->private_offset = cff_parse_num( data ); |
Tom Kacvinsky | 8d1f604 | 2001-01-03 00:21:59 +0000 | [diff] [blame] | 399 | error = CFF_Err_Ok; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 400 | } |
| 401 | |
| 402 | return error; |
| 403 | } |
| 404 | |
| 405 | |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 406 | static |
| 407 | FT_Error cff_parse_cid_ros( CFF_Parser* parser ) |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 408 | { |
| 409 | CFF_Font_Dict* dict = (CFF_Font_Dict*)parser->object; |
| 410 | FT_Byte** data = parser->stack; |
| 411 | FT_Error error; |
| 412 | |
| 413 | |
Tom Kacvinsky | 8d1f604 | 2001-01-03 00:21:59 +0000 | [diff] [blame] | 414 | error = CFF_Err_Stack_Underflow; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 415 | |
| 416 | if ( parser->top >= parser->stack + 3 ) |
| 417 | { |
| 418 | dict->cid_registry = (FT_UInt)cff_parse_num ( data++ ); |
| 419 | dict->cid_ordering = (FT_UInt)cff_parse_num ( data++ ); |
| 420 | dict->cid_supplement = (FT_ULong)cff_parse_num( data ); |
Tom Kacvinsky | 8d1f604 | 2001-01-03 00:21:59 +0000 | [diff] [blame] | 421 | error = CFF_Err_Ok; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 422 | } |
| 423 | |
| 424 | return error; |
| 425 | } |
| 426 | |
| 427 | |
| 428 | #define CFF_FIELD_NUM( code, name ) \ |
| 429 | CFF_FIELD( code, name, cff_kind_num ) |
| 430 | #define CFF_FIELD_FIXED( code, name ) \ |
| 431 | CFF_FIELD( code, name, cff_kind_fixed ) |
| 432 | #define CFF_FIELD_STRING( code, name ) \ |
| 433 | CFF_FIELD( code, name, cff_kind_string ) |
| 434 | #define CFF_FIELD_BOOL( code, name ) \ |
| 435 | CFF_FIELD( code, name, cff_kind_bool ) |
| 436 | #define CFF_FIELD_DELTA( code, name, max ) \ |
| 437 | CFF_FIELD( code, name, cff_kind_delta ) |
| 438 | |
| 439 | #define CFF_FIELD_CALLBACK( code, name ) \ |
| 440 | { \ |
| 441 | cff_kind_callback, \ |
| 442 | code | CFFCODE, \ |
| 443 | 0, 0, \ |
| 444 | cff_parse_ ## name, \ |
| 445 | 0, 0 \ |
| 446 | }, |
| 447 | |
| 448 | #undef CFF_FIELD |
| 449 | #define CFF_FIELD( code, name, kind ) \ |
| 450 | { \ |
| 451 | kind, \ |
| 452 | code | CFFCODE, \ |
| 453 | FT_FIELD_OFFSET( name ), \ |
| 454 | FT_FIELD_SIZE( name ), \ |
| 455 | 0, 0, 0 \ |
| 456 | }, |
| 457 | |
| 458 | #undef CFF_FIELD_DELTA |
| 459 | #define CFF_FIELD_DELTA( code, name, max ) \ |
| 460 | { \ |
| 461 | cff_kind_delta, \ |
| 462 | code | CFFCODE, \ |
| 463 | FT_FIELD_OFFSET( name ), \ |
| 464 | FT_FIELD_SIZE_DELTA( name ), \ |
| 465 | 0, \ |
| 466 | max, \ |
| 467 | FT_FIELD_OFFSET( num_ ## name ) \ |
| 468 | }, |
| 469 | |
| 470 | #define CFFCODE_TOPDICT 0x1000 |
| 471 | #define CFFCODE_PRIVATE 0x2000 |
| 472 | |
| 473 | static const CFF_Field_Handler cff_field_handlers[] = |
| 474 | { |
| 475 | |
David Turner | 8d3a401 | 2001-03-20 11:14:24 +0000 | [diff] [blame] | 476 | #include "cfftoken.h" |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 477 | |
| 478 | { 0, 0, 0, 0, 0, 0, 0 } |
| 479 | }; |
| 480 | |
| 481 | |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 482 | FT_LOCAL_DEF |
| 483 | FT_Error CFF_Parser_Run( CFF_Parser* parser, |
| 484 | FT_Byte* start, |
| 485 | FT_Byte* limit ) |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 486 | { |
| 487 | FT_Byte* p = start; |
Tom Kacvinsky | 8d1f604 | 2001-01-03 00:21:59 +0000 | [diff] [blame] | 488 | FT_Error error = CFF_Err_Ok; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 489 | |
| 490 | |
| 491 | parser->top = parser->stack; |
| 492 | parser->start = start; |
| 493 | parser->limit = limit; |
| 494 | parser->cursor = start; |
| 495 | |
| 496 | while ( p < limit ) |
| 497 | { |
David Turner | 8edbcab | 2001-06-19 08:28:24 +0000 | [diff] [blame^] | 498 | FT_UInt v = *p; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 499 | |
| 500 | |
| 501 | if ( v >= 27 && v != 31 ) |
| 502 | { |
| 503 | /* it's a number; we will push its position on the stack */ |
| 504 | if ( parser->top - parser->stack >= CFF_MAX_STACK_DEPTH ) |
| 505 | goto Stack_Overflow; |
| 506 | |
| 507 | *parser->top ++ = p; |
| 508 | |
| 509 | /* now, skip it */ |
| 510 | if ( v == 30 ) |
| 511 | { |
| 512 | /* skip real number */ |
| 513 | p++; |
| 514 | for (;;) |
| 515 | { |
| 516 | if ( p >= limit ) |
| 517 | goto Syntax_Error; |
| 518 | v = p[0] >> 4; |
| 519 | if ( v == 15 ) |
| 520 | break; |
| 521 | v = p[0] & 0xF; |
| 522 | if ( v == 15 ) |
| 523 | break; |
| 524 | p++; |
| 525 | } |
| 526 | } |
| 527 | else if ( v == 28 ) |
| 528 | p += 2; |
| 529 | else if ( v == 29 ) |
| 530 | p += 4; |
| 531 | else if ( v > 246 ) |
| 532 | p += 1; |
| 533 | } |
| 534 | else |
| 535 | { |
| 536 | /* This is not a number, hence it's an operator. Compute its code */ |
| 537 | /* and look for it in our current list. */ |
| 538 | |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 539 | FT_UInt code; |
| 540 | FT_UInt num_args = (FT_UInt) |
| 541 | ( parser->top - parser->stack ); |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 542 | const CFF_Field_Handler* field; |
| 543 | |
| 544 | |
| 545 | /* first of all, a trivial check */ |
| 546 | if ( num_args < 1 ) |
| 547 | goto Stack_Underflow; |
| 548 | |
| 549 | *parser->top = p; |
| 550 | code = v; |
| 551 | if ( v == 12 ) |
| 552 | { |
| 553 | /* two byte operator */ |
| 554 | p++; |
| 555 | code = 0x100 | p[0]; |
| 556 | } |
| 557 | code = code | parser->object_code; |
| 558 | |
| 559 | for ( field = cff_field_handlers; field->kind; field++ ) |
| 560 | { |
| 561 | if ( field->code == (FT_Int)code ) |
| 562 | { |
| 563 | /* we found our field's handler; read it */ |
| 564 | FT_Long val; |
| 565 | FT_Byte* q = (FT_Byte*)parser->object + field->offset; |
| 566 | |
Werner Lemberg | cc069be | 2000-12-08 16:17:16 +0000 | [diff] [blame] | 567 | |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 568 | switch ( field->kind ) |
| 569 | { |
| 570 | case cff_kind_bool: |
| 571 | case cff_kind_string: |
| 572 | case cff_kind_num: |
| 573 | val = cff_parse_num( parser->stack ); |
| 574 | goto Store_Number; |
| 575 | |
| 576 | case cff_kind_fixed: |
| 577 | val = cff_parse_fixed( parser->stack ); |
| 578 | |
| 579 | Store_Number: |
| 580 | switch ( field->size ) |
| 581 | { |
| 582 | case 1: |
| 583 | *(FT_Byte*)q = (FT_Byte)val; |
| 584 | break; |
| 585 | |
| 586 | case 2: |
| 587 | *(FT_Short*)q = (FT_Short)val; |
| 588 | break; |
| 589 | |
| 590 | case 4: |
| 591 | *(FT_Int32*)q = (FT_Int)val; |
| 592 | break; |
| 593 | |
| 594 | default: /* for 64-bit systems where long is 8 bytes */ |
| 595 | *(FT_Long*)q = val; |
| 596 | } |
| 597 | break; |
| 598 | |
| 599 | case cff_kind_delta: |
| 600 | { |
| 601 | FT_Byte* qcount = (FT_Byte*)parser->object + |
| 602 | field->count_offset; |
| 603 | |
| 604 | FT_Byte** data = parser->stack; |
| 605 | |
| 606 | |
| 607 | if ( num_args > field->array_max ) |
| 608 | num_args = field->array_max; |
| 609 | |
| 610 | /* store count */ |
| 611 | *qcount = (FT_Byte)num_args; |
| 612 | |
| 613 | val = 0; |
| 614 | while ( num_args > 0 ) |
| 615 | { |
| 616 | val += cff_parse_num( data++ ); |
| 617 | switch ( field->size ) |
| 618 | { |
| 619 | case 1: |
| 620 | *(FT_Byte*)q = (FT_Byte)val; |
| 621 | break; |
| 622 | |
| 623 | case 2: |
| 624 | *(FT_Short*)q = (FT_Short)val; |
| 625 | break; |
| 626 | |
| 627 | case 4: |
| 628 | *(FT_Int32*)q = (FT_Int)val; |
| 629 | break; |
| 630 | |
| 631 | default: /* for 64-bit systems */ |
| 632 | *(FT_Long*)q = val; |
| 633 | } |
| 634 | |
| 635 | q += field->size; |
| 636 | num_args--; |
| 637 | } |
| 638 | } |
| 639 | break; |
| 640 | |
| 641 | default: /* callback */ |
| 642 | error = field->reader( parser ); |
| 643 | if ( error ) |
| 644 | goto Exit; |
| 645 | } |
| 646 | goto Found; |
| 647 | } |
| 648 | } |
| 649 | |
| 650 | /* this is an unknown operator, or it is unsupported; */ |
| 651 | /* we will ignore it for now. */ |
| 652 | |
| 653 | Found: |
| 654 | /* clear stack */ |
| 655 | parser->top = parser->stack; |
| 656 | } |
| 657 | p++; |
| 658 | } |
| 659 | |
| 660 | Exit: |
| 661 | return error; |
| 662 | |
| 663 | Stack_Overflow: |
Tom Kacvinsky | 8d1f604 | 2001-01-03 00:21:59 +0000 | [diff] [blame] | 664 | error = CFF_Err_Invalid_Argument; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 665 | goto Exit; |
| 666 | |
| 667 | Stack_Underflow: |
Tom Kacvinsky | 8d1f604 | 2001-01-03 00:21:59 +0000 | [diff] [blame] | 668 | error = CFF_Err_Invalid_Argument; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 669 | goto Exit; |
| 670 | |
| 671 | Syntax_Error: |
Tom Kacvinsky | 8d1f604 | 2001-01-03 00:21:59 +0000 | [diff] [blame] | 672 | error = CFF_Err_Invalid_Argument; |
David Turner | 19ed8af | 2000-12-08 02:42:29 +0000 | [diff] [blame] | 673 | goto Exit; |
| 674 | } |
| 675 | |
| 676 | |
| 677 | /* END */ |