/* Header for coding system handler. Copyright (C) 1995, 1997 Electrotechnical Laboratory, JAPAN. Licensed to the Free Software Foundation. This file is part of GNU Emacs. GNU Emacs 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, or (at your option) any later version. GNU Emacs 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. You should have received a copy of the GNU General Public License along with GNU Emacs; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef _CODING_H #define _CODING_H #ifndef _CCL_H #include "../src/ccl.h" #endif /*** EMACS' INTERNAL FORMAT (emacs-mule) section ***/ /* All code (1-byte) of Emacs' internal format is classified into one of the followings. See also `charset.h'. */ enum emacs_code_class_type { EMACS_control_code, /* Control codes in the range 0x00..0x1F and 0x7F except for the following two codes. */ EMACS_linefeed_code, /* 0x0A (linefeed) to denote end-of-line. */ EMACS_carriage_return_code, /* 0x0D (carriage-return) to be used in selective display mode. */ EMACS_ascii_code, /* ASCII characters. */ EMACS_leading_code_composition, /* Leading code of a composite character. */ EMACS_leading_code_2, /* Base leading code of official TYPE9N character. */ EMACS_leading_code_3, /* Base leading code of private TYPE9N or official TYPE9Nx9N character. */ EMACS_leading_code_4, /* Base leading code of private TYPE9Nx9N character. */ EMACS_invalid_code /* Invalid code, i.e. a base leading code not yet assigned to any charset, or a code of the range 0xA0..0xFF. */ }; extern enum emacs_code_class_type emacs_code_class[256]; /*** ISO2022 section ***/ /* Macros to define code of control characters for ISO2022's functions. */ /* code */ /* function */ #define ISO_CODE_LF 0x0A /* line-feed */ #define ISO_CODE_CR 0x0D /* carriage-return */ #define ISO_CODE_SO 0x0E /* shift-out */ #define ISO_CODE_SI 0x0F /* shift-in */ #define ISO_CODE_SS2_7 0x19 /* single-shift-2 for 7-bit code */ #define ISO_CODE_ESC 0x1B /* escape */ #define ISO_CODE_SS2 0x8E /* single-shift-2 */ #define ISO_CODE_SS3 0x8F /* single-shift-3 */ #define ISO_CODE_CSI 0x9B /* control-sequence-introduce */ /* All code (1-byte) of ISO2022 is classified into one of the followings. */ enum iso_code_class_type { ISO_control_code, /* Control codes in the range 0x00..0x1F, 0x7F, and 0x80..0x9F, except for the following seven codes. */ ISO_carriage_return, /* ISO_CODE_CR (0x0D) */ ISO_shift_out, /* ISO_CODE_SO (0x0E) */ ISO_shift_in, /* ISO_CODE_SI (0x0F) */ ISO_single_shift_2_7, /* ISO_CODE_SS2_7 (0x19) */ ISO_escape, /* ISO_CODE_SO (0x1B) */ ISO_single_shift_2, /* ISO_CODE_SS2 (0x8E) */ ISO_single_shift_3, /* ISO_CODE_SS3 (0x8F) */ ISO_control_sequence_introducer, /* ISO_CODE_CSI (0x9B) */ ISO_0x20_or_0x7F, /* Codes of the values 0x20 or 0x7F. */ ISO_graphic_plane_0, /* Graphic codes in the range 0x21..0x7E. */ ISO_0xA0_or_0xFF, /* Codes of the values 0xA0 or 0xFF. */ ISO_graphic_plane_1 /* Graphic codes in the range 0xA1..0xFE. */ }; /** The macros CODING_FLAG_ISO_XXX defines a flag bit of the `flags' element in the structure `coding_system'. This information is used while encoding a text to ISO2022. **/ /* If set, produce short-form designation sequence (e.g. ESC $ A) instead of long-form sequence (e.g. ESC $ ( A). */ #define CODING_FLAG_ISO_SHORT_FORM 0x0001 /* If set, reset graphic planes and registers at end-of-line to the initial state. */ #define CODING_FLAG_ISO_RESET_AT_EOL 0x0002 /* If set, reset graphic planes and registers before any control characters to the initial state. */ #define CODING_FLAG_ISO_RESET_AT_CNTL 0x0004 /* If set, encode by 7-bit environment. */ #define CODING_FLAG_ISO_SEVEN_BITS 0x0008 /* If set, use locking-shift function. */ #define CODING_FLAG_ISO_LOCKING_SHIFT 0x0010 /* If set, use single-shift function. Overwrite CODING_FLAG_ISO_LOCKING_SHIFT. */ #define CODING_FLAG_ISO_SINGLE_SHIFT 0x0020 /* If set, designate JISX0201-Roman instead of ASCII. */ #define CODING_FLAG_ISO_USE_ROMAN 0x0040 /* If set, designate JISX0208-1978 instead of JISX0208-1983. */ #define CODING_FLAG_ISO_USE_OLDJIS 0x0080 /* If set, do not produce ISO6429's direction specifying sequence. */ #define CODING_FLAG_ISO_NO_DIRECTION 0x0100 /* If set, assume designation states are reset at beginning of line on output. */ #define CODING_FLAG_ISO_INIT_AT_BOL 0x0200 /* If set, designation sequence should be placed at beginning of line on output. */ #define CODING_FLAG_ISO_DESIGNATE_AT_BOL 0x0400 /* If set, do not encode unsafe charactes on output. */ #define CODING_FLAG_ISO_SAFE 0x0800 /* If set, extra latin codes (128..159) are accepted as a valid code on input. */ #define CODING_FLAG_ISO_LATIN_EXTRA 0x1000 /* If set, use designation escape sequence. */ #define CODING_FLAG_ISO_DESIGNATION 0x10000 /* A character to be produced on output if encoding of the original character is prohibited by CODING_FLAG_ISO_SAFE. */ #define CODING_INHIBIT_CHARACTER_SUBSTITUTION 077 /* 077 == `?' */ /* Structure of the field `spec.iso2022' in the structure `coding_system'. */ struct iso2022_spec { /* The current graphic register invoked to each graphic plane. */ int current_invocation[2]; /* The current charset designated to each graphic register. */ int current_designation[4]; /* A charset initially designated to each graphic register. */ int initial_designation[4]; /* If not -1, it is a graphic register specified in an invalid designation sequence. */ int last_invalid_designation_register; /* A graphic register to which each charset should be designated. */ unsigned char requested_designation[MAX_CHARSET + 1]; /* A revision number to be specified for each charset on encoding. The value 255 means no revision number for the corresponding charset. */ unsigned char charset_revision_number[MAX_CHARSET + 1]; /* Set to 1 temporarily only when graphic register 2 or 3 is invoked by single-shift while encoding. */ int single_shifting; /* Set to 1 temporarily only when processing at beginning of line. */ int bol; }; /* Macros to access each field in the structure `spec.iso2022'. */ #define CODING_SPEC_ISO_INVOCATION(coding, plane) \ (coding)->spec.iso2022.current_invocation[plane] #define CODING_SPEC_ISO_DESIGNATION(coding, reg) \ (coding)->spec.iso2022.current_designation[reg] #define CODING_SPEC_ISO_INITIAL_DESIGNATION(coding, reg) \ (coding)->spec.iso2022.initial_designation[reg] #define CODING_SPEC_ISO_REQUESTED_DESIGNATION(coding, charset) \ (coding)->spec.iso2022.requested_designation[charset] #define CODING_SPEC_ISO_REVISION_NUMBER(coding, charset) \ (coding)->spec.iso2022.charset_revision_number[charset] #define CODING_SPEC_ISO_SINGLE_SHIFTING(coding) \ (coding)->spec.iso2022.single_shifting #define CODING_SPEC_ISO_BOL(coding) \ (coding)->spec.iso2022.bol /* A value which may appear in coding->spec.iso2022.requested_designation indicating that the corresponding charset does not request any graphic register to be designated. */ #define CODING_SPEC_ISO_NO_REQUESTED_DESIGNATION 4 /* Return a charset which is currently designated to the graphic plane PLANE in the coding-system CODING. */ #define CODING_SPEC_ISO_PLANE_CHARSET(coding, plane) \ ((CODING_SPEC_ISO_INVOCATION (coding, plane) < 0) \ ? -1 \ : CODING_SPEC_ISO_DESIGNATION (coding, \ CODING_SPEC_ISO_INVOCATION (coding, plane))) /*** BIG5 section ***/ /* Macros to denote each type of BIG5 coding system. */ #define CODING_FLAG_BIG5_HKU 0x00 /* BIG5-HKU is one of variants of BIG5 developed by Hong Kong University. */ #define CODING_FLAG_BIG5_ETEN 0x01 /* BIG5_ETen is one of variants of BIG5 developed by the company ETen in Taiwan. */ /*** GENERAL section ***/ /* Types of coding system. */ enum coding_type { coding_type_no_conversion, /* A coding system which requires no conversion for reading and writing including end-of-line format. */ coding_type_emacs_mule, /* A coding system used in Emacs' buffer and string. Requires no conversion for reading and writing except for end-of-line format. */ coding_type_undecided, /* A coding system which requires automatic detection of a real coding system. */ coding_type_sjis, /* SJIS coding system for Japanese. */ coding_type_iso2022, /* Any coding system of ISO2022 variants. */ coding_type_big5, /* BIG5 coding system for Chinese. */ coding_type_ccl, /* The coding system of which decoder and encoder are written in CCL. */ coding_type_raw_text /* A coding system for a text containing ramdom 8-bit code which does not require code conversion except for end-of-line format. */ }; /* Formats of end-of-line. */ #define CODING_EOL_LF 0 /* Line-feed only, same as Emacs' internal format. */ #define CODING_EOL_CRLF 1 /* Sequence of carriage-return and line-feed. */ #define CODING_EOL_CR 2 /* Carriage-return only. */ #define CODING_EOL_UNDECIDED 3 /* This value is used to denote the eol-type is not yet decided. */ #define CODING_EOL_INCONSISTENT 4 /* This value is used to denote the eol-type is not consistent through the file. */ /* Character composition status while encoding/decoding. */ #define COMPOSING_NO 0 /* not composing */ #define COMPOSING_WITH_RULE_HEAD 1 /* 1st char of with-rule composing follow */ #define COMPOSING_NO_RULE_HEAD 2 /* 1st char of no-rule composing follow */ #define COMPOSING_WITH_RULE_TAIL 3 /* Nth char of with-rule composing follow */ #define COMPOSING_NO_RULE_TAIL 4 /* Nth char of no-rule composing follow */ #define COMPOSING_WITH_RULE_RULE 5 /* composition rule follow */ /* 1 iff composing. */ #define COMPOSING_P(composing) (composing) /* 1 iff 1st char of composing element follows. */ #define COMPOSING_HEAD_P(composing) \ ((composing) && (composing) <= COMPOSING_NO_RULE_HEAD) /* 1 iff composing with embeded composition rule. */ #define COMPOSING_WITH_RULE_P(composing) ((composing) & 1) /* Macros used for the member finish_status of the struct coding_system. */ #define CODING_FINISH_NORMAL 0 #define CODING_FINISH_INSUFFICIENT_SRC 1 #define CODING_FINISH_INSUFFICIENT_DST 2 #define CODING_FINISH_INCONSISTENT_EOL 3 #define CODING_FINISH_INTERRUPT 4 /* Macros used for the member `mode' of the struct coding_system. */ /* If set, recover the original CR or LF of the already decoded text when the decoding routine encounters an inconsistent eol format. */ #define CODING_MODE_INHIBIT_INCONSISTENT_EOL 0x01 /* If set, the decoding/encoding routines treat the current data as the last block of the whole text to be converted, and do appropriate fisishing job. */ #define CODING_MODE_LAST_BLOCK 0x02 /* If set, it means that the current source text is in a buffer which enables selective display. */ #define CODING_MODE_SELECTIVE_DISPLAY 0x04 /* This flag is used by the decoding/encoding routines on the fly. If set, it means that right-to-left text is being processed. */ #define CODING_MODE_DIRECTION 0x08 struct coding_system { /* Type of the coding system. */ enum coding_type type; /* Type of end-of-line format (LF, CRLF, or CR) of the coding system. */ int eol_type; /* Flag bits of the coding system. The meaning of each bit is common to all types of coding systems. */ unsigned int common_flags; /* Flag bits of the coding system. The meaning of each bit depends on the type of the coding system. */ unsigned int flags; /* Mode bits of the coding system. See the comments of the macros CODING_MODE_XXX. */ unsigned int mode; /* Table of safe character sets for this coding system. If the Nth element is 0, the charset of ID N is not a safe character set. Such a character set is not encoded when CODING_ISO_FLAG_SAFE is set. */ unsigned char safe_charsets[MAX_CHARSET + 1]; /* Non-zero means that characters are being composed currently while decoding or encoding. See macros COMPOSING_XXXX above for the meaing of each non-zero value. */ int composing; /* Number of composed characters in the current composing sequence. */ int composed_chars; /* Detailed information specific to each type of coding system. */ union spec { struct iso2022_spec iso2022; struct ccl_spec ccl; /* Defined in ccl.h. */ } spec; /* Index number of coding category of the coding system. */ int category_idx; /* How may heading bytes we can skip for decoding. This is set to -1 in setup_coding_system, and updated by detect_coding. So, when this is equal to the byte length of the text being converted, we can skip the actual conversion process. */ int heading_ascii; /* The following members are set by encoding/decoding routine. */ int produced, produced_char, consumed, consumed_char; /* Encoding routines set this to 1 when they produce a byte sequence which can be parsed as a multibyte character. Decoding routines set this to 1 when they encounter an invalid code and, as the result, produce an unexpected multibyte character. */ int fake_multibyte; /* The following members are all Lisp symbols. We don't have to protect them from GC because the current garbage collection doesn't relocate Lisp symbols. But, when it is changed, we must find a way to protect them. */ /* Backward pointer to the Lisp symbol of the coding system. */ Lisp_Object symbol; /* Lisp function (symbol) to be called after decoding to do additional conversion, or nil. */ Lisp_Object post_read_conversion; /* Lisp function (symbol) to be called before encoding to do additional conversion, or nil. */ Lisp_Object pre_write_conversion; /* Character translation tables to look up, or nil. */ Lisp_Object translation_table_for_decode; Lisp_Object translation_table_for_encode; }; #define CODING_REQUIRE_FLUSHING_MASK 1 #define CODING_REQUIRE_DECODING_MASK 2 #define CODING_REQUIRE_ENCODING_MASK 4 #define CODING_REQUIRE_DETECTION_MASK 8 /* Return 1 if the coding system CODING requires specific code to be attached at the tail of converted text. */ #define CODING_REQUIRE_FLUSHING(coding) \ ((coding)->common_flags & CODING_REQUIRE_FLUSHING_MASK) /* Return 1 if the coding system CODING requires code conversion on decoding. */ #define CODING_REQUIRE_DECODING(coding) \ ((coding)->common_flags & CODING_REQUIRE_DECODING_MASK) /* Return 1 if the coding system CODING requires code conversion on encoding. */ #define CODING_REQUIRE_ENCODING(coding) \ ((coding)->common_flags & CODING_REQUIRE_ENCODING_MASK) /* Return 1 if the coding system CODING requires some kind of code detection. */ #define CODING_REQUIRE_DETECTION(coding) \ ((coding)->common_flags & CODING_REQUIRE_DETECTION_MASK) #define CODING_MAY_REQUIRE_DECODING(coding) \ ((coding)->common_flags \ & (CODING_REQUIRE_DETECTION_MASK | CODING_REQUIRE_DECODING_MASK)) /* Index for each coding category in `coding_category_table' */ #define CODING_CATEGORY_IDX_EMACS_MULE 0 #define CODING_CATEGORY_IDX_SJIS 1 #define CODING_CATEGORY_IDX_ISO_7 2 #define CODING_CATEGORY_IDX_ISO_7_TIGHT 3 #define CODING_CATEGORY_IDX_ISO_8_1 4 #define CODING_CATEGORY_IDX_ISO_8_2 5 #define CODING_CATEGORY_IDX_ISO_7_ELSE 6 #define CODING_CATEGORY_IDX_ISO_8_ELSE 7 #define CODING_CATEGORY_IDX_CCL 8 #define CODING_CATEGORY_IDX_BIG5 9 #define CODING_CATEGORY_IDX_RAW_TEXT 10 #define CODING_CATEGORY_IDX_BINARY 11 #define CODING_CATEGORY_IDX_MAX 12 /* Definitions of flag bits returned by the function detect_coding_mask (). */ #define CODING_CATEGORY_MASK_EMACS_MULE (1 << CODING_CATEGORY_IDX_EMACS_MULE) #define CODING_CATEGORY_MASK_SJIS (1 << CODING_CATEGORY_IDX_SJIS) #define CODING_CATEGORY_MASK_ISO_7 (1 << CODING_CATEGORY_IDX_ISO_7) #define CODING_CATEGORY_MASK_ISO_7_TIGHT (1 << CODING_CATEGORY_IDX_ISO_7_TIGHT) #define CODING_CATEGORY_MASK_ISO_8_1 (1 << CODING_CATEGORY_IDX_ISO_8_1) #define CODING_CATEGORY_MASK_ISO_8_2 (1 << CODING_CATEGORY_IDX_ISO_8_2) #define CODING_CATEGORY_MASK_ISO_7_ELSE (1 << CODING_CATEGORY_IDX_ISO_7_ELSE) #define CODING_CATEGORY_MASK_ISO_8_ELSE (1 << CODING_CATEGORY_IDX_ISO_8_ELSE) #define CODING_CATEGORY_MASK_CCL (1 << CODING_CATEGORY_IDX_CCL) #define CODING_CATEGORY_MASK_BIG5 (1 << CODING_CATEGORY_IDX_BIG5) #define CODING_CATEGORY_MASK_RAW_TEXT (1 << CODING_CATEGORY_IDX_RAW_TEXT) #define CODING_CATEGORY_MASK_BINARY (1 << CODING_CATEGORY_IDX_BINARY) /* This value is returned if detect_coding_mask () find nothing other than ASCII characters. */ #define CODING_CATEGORY_MASK_ANY \ ( CODING_CATEGORY_MASK_EMACS_MULE \ | CODING_CATEGORY_MASK_SJIS \ | CODING_CATEGORY_MASK_ISO_7 \ | CODING_CATEGORY_MASK_ISO_7_TIGHT \ | CODING_CATEGORY_MASK_ISO_8_1 \ | CODING_CATEGORY_MASK_ISO_8_2 \ | CODING_CATEGORY_MASK_ISO_7_ELSE \ | CODING_CATEGORY_MASK_ISO_8_ELSE \ | CODING_CATEGORY_MASK_CCL \ | CODING_CATEGORY_MASK_BIG5) #define CODING_CATEGORY_MASK_ISO_7BIT \ (CODING_CATEGORY_MASK_ISO_7 | CODING_CATEGORY_MASK_ISO_7_TIGHT) #define CODING_CATEGORY_MASK_ISO_8BIT \ (CODING_CATEGORY_MASK_ISO_8_1 | CODING_CATEGORY_MASK_ISO_8_2) #define CODING_CATEGORY_MASK_ISO_SHIFT \ (CODING_CATEGORY_MASK_ISO_7_ELSE | CODING_CATEGORY_MASK_ISO_8_ELSE) #define CODING_CATEGORY_MASK_ISO \ ( CODING_CATEGORY_MASK_ISO_7BIT \ | CODING_CATEGORY_MASK_ISO_SHIFT \ | CODING_CATEGORY_MASK_ISO_8BIT) /* Macros to decode or encode a character of JISX0208 in SJIS. S1 and S2 are the 1st and 2nd position-codes of JISX0208 in SJIS coding system. C1 and C2 are the 1st and 2nd position codes of Emacs' internal format. */ #define DECODE_SJIS(s1, s2, c1, c2) \ do { \ if (s2 >= 0x9F) \ c1 = s1 * 2 - (s1 >= 0xE0 ? 0x160 : 0xE0), \ c2 = s2 - 0x7E; \ else \ c1 = s1 * 2 - ((s1 >= 0xE0) ? 0x161 : 0xE1), \ c2 = s2 - ((s2 >= 0x7F) ? 0x20 : 0x1F); \ } while (0) #define ENCODE_SJIS(c1, c2, s1, s2) \ do { \ if (c1 & 1) \ s1 = c1 / 2 + ((c1 < 0x5F) ? 0x71 : 0xB1), \ s2 = c2 + ((c2 >= 0x60) ? 0x20 : 0x1F); \ else \ s1 = c1 / 2 + ((c1 < 0x5F) ? 0x70 : 0xB0), \ s2 = c2 + 0x7E; \ } while (0) /* Encode the file name NAME using the specified coding system for file names, if any. */ #define ENCODE_FILE(name) \ (! NILP (Vfile_name_coding_system) \ && XFASTINT (Vfile_name_coding_system) != 0 \ ? code_convert_string_norecord (name, Vfile_name_coding_system, 1) \ : (! NILP (Vdefault_file_name_coding_system) \ && XFASTINT (Vdefault_file_name_coding_system) != 0 \ ? code_convert_string_norecord (name, Vdefault_file_name_coding_system, 1) \ : name)) /* Decode the file name NAME using the specified coding system for file names, if any. */ #define DECODE_FILE(name) \ (! NILP (Vfile_name_coding_system) \ && XFASTINT (Vfile_name_coding_system) != 0 \ ? code_convert_string_norecord (name, Vfile_name_coding_system, 0) \ : (! NILP (Vdefault_file_name_coding_system) \ && XFASTINT (Vdefault_file_name_coding_system) != 0 \ ? code_convert_string_norecord (name, Vdefault_file_name_coding_system, 0) \ : name)) #ifdef WINDOWSNT /* Encode the string STR using the specified coding system for w32 system functions, if any. */ #define ENCODE_SYSTEM(str) \ (! NILP (Vw32_system_coding_system) \ && XFASTINT (Vw32_system_coding_system) != 0 \ ? code_convert_string_norecord (str, Vw32_system_coding_system, 1) \ : str) /* Decode the string STR using the specified coding system for w32 system functions, if any. */ #define DECODE_SYSTEM(name) \ (! NILP (Vw32_system_coding_system) \ && XFASTINT (Vw32_system_coding_system) != 0 \ ? code_convert_string_norecord (str, Vw32_system_coding_system, 0) \ : str) #endif /* Extern declarations. */ extern int decode_coding P_ ((struct coding_system *, unsigned char *, unsigned char *, int, int)); extern int encode_coding P_ ((struct coding_system *, unsigned char *, unsigned char *, int, int)); extern int code_convert_region P_ ((int, int, int, int, struct coding_system *, int, int)); extern int decoding_buffer_size P_ ((struct coding_system *, int)); extern int encoding_buffer_size P_ ((struct coding_system *, int)); extern void detect_coding P_ ((struct coding_system *, unsigned char *, int)); extern void detect_eol P_ ((struct coding_system *, unsigned char *, int)); extern int conversion_buffer_size; extern char *conversion_buffer; extern char *get_conversion_buffer P_ ((int)); extern int setup_coding_system P_ ((Lisp_Object, struct coding_system *)); extern void setup_raw_text_coding_system P_ ((struct coding_system *)); extern Lisp_Object Qcoding_system, Qeol_type, Qcoding_category_index; extern Lisp_Object Qraw_text, Qemacs_mule; extern Lisp_Object Qbuffer_file_coding_system; extern Lisp_Object Vcoding_category_list; extern Lisp_Object Qtranslation_table; extern Lisp_Object Qtranslation_table_id; /* Mnemonic strings to indicate each type of end-of-line. */ extern Lisp_Object eol_mnemonic_unix, eol_mnemonic_dos, eol_mnemonic_mac; /* Mnemonic string to indicate type of end-of-line is not yet decided. */ extern Lisp_Object eol_mnemonic_undecided; #ifdef emacs extern Lisp_Object Qfile_coding_system; extern Lisp_Object Qcall_process, Qcall_process_region, Qprocess_argument; extern Lisp_Object Qstart_process, Qopen_network_stream; /* Coding-system for reading files and receiving data from process. */ extern Lisp_Object Vcoding_system_for_read; /* Coding-system for writing files and sending data to process. */ extern Lisp_Object Vcoding_system_for_write; /* Coding-system actually used in the latest I/O. */ extern Lisp_Object Vlast_coding_system_used; /* If non-zero, process buffer inherits the coding system used to decode the subprocess output. */ extern int inherit_process_coding_system; /* Coding-system to be used for encoding terminal output. This structure contains information of a coding-system specified by the function `set-terminal-coding-system'. */ extern struct coding_system terminal_coding; /* Coding system to be used to encode text for terminal display when terminal coding system is nil. */ extern struct coding_system safe_terminal_coding; /* Coding-system of what is sent from terminal keyboard. This structure contains information of a coding-system specified by the function `set-keyboard-coding-system'. */ extern struct coding_system keyboard_coding; /* Default coding system to be used to write a file. */ extern struct coding_system default_buffer_file_coding; /* Default coding systems used for process I/O. */ extern Lisp_Object Vdefault_process_coding_system; /* Function to call to force a user to force select a propert coding system. */ extern Lisp_Object Vselect_safe_coding_system_function; /* Coding system for file names, or nil if none. */ extern Lisp_Object Vfile_name_coding_system; /* Coding system for file names used only when Vfile_name_coding_system is nil. */ extern Lisp_Object Vdefault_file_name_coding_system; #ifdef WINDOWSNT /* Coding system for w32 system strings, or nil if none. */ extern Lisp_Object Vw32_system_coding_system; #endif #endif #endif /* _CODING_H */