255 lines
8.4 KiB
C
255 lines
8.4 KiB
C
/***************************************************************************/
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/* */
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/* t1tokens.h */
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/* */
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/* Type 1 tokenizer (specification). */
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/* */
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/* Copyright 1996-2000 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#ifndef T1TOKENS_H
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#define T1TOKENS_H
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#ifdef FT_FLAT_COMPILE
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#include "t1objs.h"
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#else
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#include <type1/t1objs.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* enum value of first keyword */
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#define key_first_ 100
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/* enum value of first immediate name */
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#define imm_first_ 200
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typedef enum T1_TokenType_
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{
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tok_error = 0,
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tok_eof, /* end of file */
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/* simple token types */
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tok_keyword, /* keyword */
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tok_number, /* number (integer or real) */
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tok_string, /* postscript string */
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tok_program, /* postscript program */
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tok_immediate, /* any immediate name */
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tok_array, /* matrix, array, etc.. */
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tok_hexarray, /* array of hexadecimal nibbles */
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tok_any, /* anything else */
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/* Postscript keywords -- placed in lexicographical order */
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key_RD_alternate = key_first_, /* `-|' = alternate form of RD */
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key_ExpertEncoding,
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key_ND,
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key_NP,
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key_RD,
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key_StandardEncoding,
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key_array,
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key_begin,
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key_closefile,
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key_currentdict,
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key_currentfile,
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key_def,
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key_dict,
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key_dup,
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key_eexec,
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key_end,
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key_execonly,
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key_false,
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key_for,
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key_index,
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key_noaccess,
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key_put,
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key_readonly,
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key_true,
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key_userdict,
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key_NP_alternate, /* `|' = alternate form of NP */
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key_ND_alternate, /* `|-' = alternate form of ND */
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key_max, /* always keep this value there */
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/* Postscript immediate names -- other names will be ignored, except */
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/* in charstrings */
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imm_RD_alternate = imm_first_, /* `-|' = alternate form of RD */
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imm_notdef, /* `/.notdef' immediate */
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imm_BlendAxisTypes,
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imm_BlueFuzz,
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imm_BlueScale,
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imm_BlueShift,
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imm_BlueValues,
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imm_CharStrings,
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imm_Encoding,
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imm_FamilyBlues,
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imm_FamilyName,
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imm_FamilyOtherBlues,
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imm_FID,
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imm_FontBBox,
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imm_FontID,
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imm_FontInfo,
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imm_FontMatrix,
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imm_FontName,
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imm_FontType,
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imm_ForceBold,
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imm_FullName,
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imm_ItalicAngle,
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imm_LanguageGroup,
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imm_Metrics,
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imm_MinFeature,
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imm_ND,
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imm_NP,
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imm_Notice,
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imm_OtherBlues,
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imm_OtherSubrs,
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imm_PaintType,
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imm_Private,
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imm_RD,
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imm_RndStemUp,
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imm_StdHW,
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imm_StdVW,
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imm_StemSnapH,
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imm_StemSnapV,
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imm_StrokeWidth,
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imm_Subrs,
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imm_UnderlinePosition,
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imm_UnderlineThickness,
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imm_UniqueID,
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imm_Weight,
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imm_isFixedPitch,
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imm_lenIV,
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imm_password,
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imm_version,
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imm_NP_alternate, /* `|' = alternate form of NP */
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imm_ND_alternate, /* `|-' = alternate form of ND */
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imm_max /* always keep this value here */
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} T1_TokenType;
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/* these arrays are visible for debugging purposes */
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extern const char* t1_keywords[];
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extern const char* t1_immediates[];
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* T1_Token */
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/* */
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/* <Description> */
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/* A structure used to describe a token in the current input stream. */
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/* Note that the Type1 driver doesn't try to interpret tokens until */
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/* it really needs to. */
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/* */
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/* <Fields> */
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/* kind :: The token type. Describes the token to the loader. */
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/* */
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/* kind2 :: Detailed token type. */
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/* */
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/* start :: The index of the first character of token in the input */
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/* stream. */
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/* */
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/* len :: The length of the token in characters. */
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/* */
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typedef struct T1_Token_
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{
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T1_TokenType kind; /* simple type */
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T1_TokenType kind2; /* detailed type */
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FT_Int start; /* index of first token character */
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FT_Int len; /* length of token in chars */
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} T1_Token;
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typedef struct T1_TokenParser_
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{
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FT_Memory memory;
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FT_Stream stream;
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FT_Bool in_pfb; /* true if PFB file, PFA otherwise */
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FT_Bool in_private; /* true if in private dictionary */
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FT_Byte* base; /* base address of current read buffer */
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FT_Long cursor; /* current position in read buffer */
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FT_Long limit; /* limit of current read buffer */
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FT_Long max; /* maximum size of read buffer */
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FT_Error error; /* last error */
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T1_Token token; /* last token read */
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} T1_TokenParser;
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/*************************************************************************/
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/* */
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/* <Type> */
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/* T1_Tokenizer */
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/* */
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/* <Description> */
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/* A handle to an object used to extract tokens from the input. The */
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/* object is able to perform PFA/PFB recognition, eexec decryption of */
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/* the private dictionary, as well as eexec decryption of the */
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/* charstrings. */
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/* */
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typedef T1_TokenParser* T1_Tokenizer;
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LOCAL_DEF
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FT_Error New_Tokenizer( FT_Stream stream,
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T1_Tokenizer* tokenizer );
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LOCAL_DEF
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FT_Error Done_Tokenizer( T1_Tokenizer tokenizer );
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LOCAL_DEF
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FT_Error Open_PrivateDict( T1_Tokenizer tokenizer );
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LOCAL_DEF
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FT_Error Read_Token( T1_Tokenizer tokenizer );
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#if 0
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LOCAL_DEF
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FT_Error Read_CharStrings( T1_Tokenizer tokenizer,
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FT_Int num_chars,
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FT_Byte* buffer );
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#endif /* 0 */
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LOCAL_DEF
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void t1_decrypt( FT_Byte* buffer,
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FT_Int length,
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FT_UShort seed );
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#ifdef __cplusplus
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}
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#endif
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#endif /* T1TOKENS_H */
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/* END */
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