/* Header for coding system handler.
- Ver.1.0
- Copyright (C) 1995 Free Software Foundation, Inc.
- Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.
+ Copyright (C) 1995, 1997 Electrotechnical Laboratory, JAPAN.
+ Licensed to the Free Software Foundation.
This file is part of GNU Emacs.
on output. */
#define CODING_FLAG_ISO_DESIGNATE_AT_BOL 0x0400
+/* If set, do not encode unexpected 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
+
+/* 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
{
/* A graphic register to which each charset should be designated. */
unsigned char requested_designation[MAX_CHARSET + 1];
+ /* Table of expected character sets for this coding system. If the
+ Nth element is 0, the charset of ID N is not an expected
+ character set. Such a character set is not encoded when
+ CODING_ISO_FLAG_SAFE is set. */
+ unsigned char expected_charsets[MAX_CHARSET + 1];
+
/* Set to 1 temporarily only when graphic register 2 or 3 is invoked
by single-shift while encoding. */
int single_shifting;
coding->spec.iso2022.initial_designation[reg]
#define CODING_SPEC_ISO_REQUESTED_DESIGNATION(coding, charset) \
coding->spec.iso2022.requested_designation[charset]
+#define CODING_SPEC_ISO_EXPECTED_CHARSETS(coding) \
+ coding->spec.iso2022.expected_charsets
#define CODING_SPEC_ISO_SINGLE_SHIFTING(coding) \
coding->spec.iso2022.single_shifting
#define CODING_SPEC_ISO_BOL(coding) \
additional conversion. */
Lisp_Object pre_write_conversion;
- /* Character unification table to look up, or nil. */
- Lisp_Object character_unification_table;
+ /* Character unification tables to look up, or nil. */
+ Lisp_Object character_unification_table_for_decode;
+ Lisp_Object character_unification_table_for_encode;
/* Carryover yielded by decoding/encoding incomplete source. No
coding-system yields more than 7-byte of carryover. This does
int carryover_size;
};
-/* Return 1 if the coding-system CODING requires conversion of
- representation of a visible character (text). */
-#define CODING_REQUIRE_TEXT_CONVERSION(coding) \
- ((coding)->type != coding_type_no_conversion \
- && (coding)->type != coding_type_emacs_mule)
-
-/* Return 1 if the coding-system CODING requires conversion of the
- format of end-of-line. */
-#define CODING_REQUIRE_EOL_CONVERSION(coding) \
- ((coding)->eol_type != CODING_EOL_UNDECIDED \
- && (coding)->eol_type != CODING_EOL_LF)
+/* Return 1 if coding system CODING never requires any code conversion. */
+#define CODING_REQUIRE_NO_CONVERSION(coding) \
+ (((coding)->type == coding_type_no_conversion \
+ || (coding)->type == coding_type_emacs_mule) \
+ && (coding)->eol_type == CODING_EOL_LF)
-/* Return 1 if the coding-system CODING requires some conversion. */
-#define CODING_REQUIRE_CONVERSION(coding) \
- (CODING_REQUIRE_TEXT_CONVERSION (coding) \
- || CODING_REQUIRE_EOL_CONVERSION (coding))
+/* Return 1 if coding system CODING may not require code conversion. */
+#define CODING_MAY_REQUIRE_NO_CONVERSION(coding) \
+ (((coding)->type == coding_type_no_conversion \
+ || (coding)->type == coding_type_emacs_mule \
+ || (coding)->type == coding_type_undecided) \
+ && ((coding)->eol_type == CODING_EOL_LF \
+ || (coding)->eol_type == CODING_EOL_UNDECIDED))
/* Index for each coding category in `coding_category_table' */
#define CODING_CATEGORY_IDX_EMACS_MULE 0
#define CODING_CATEGORY_IDX_ISO_7 2
#define CODING_CATEGORY_IDX_ISO_8_1 3
#define CODING_CATEGORY_IDX_ISO_8_2 4
-#define CODING_CATEGORY_IDX_ISO_ELSE 5
-#define CODING_CATEGORY_IDX_BIG5 6
-#define CODING_CATEGORY_IDX_BINARY 7
-#define CODING_CATEGORY_IDX_MAX 8
+#define CODING_CATEGORY_IDX_ISO_7_ELSE 5
+#define CODING_CATEGORY_IDX_ISO_8_ELSE 6
+#define CODING_CATEGORY_IDX_BIG5 7
+#define CODING_CATEGORY_IDX_BINARY 8
+#define CODING_CATEGORY_IDX_MAX 9
/* Definitions of flag bits returned by the function
detect_coding_mask (). */
#define CODING_CATEGORY_MASK_ISO_7 (1 << CODING_CATEGORY_IDX_ISO_7)
#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_ELSE (1 << CODING_CATEGORY_IDX_ISO_ELSE)
+#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_BIG5 (1 << CODING_CATEGORY_IDX_BIG5)
+#define CODING_CATEGORY_MASK_BINARY (1 << CODING_CATEGORY_IDX_BINARY)
/* This value is returned if detect_coding_mask () find nothing other
than ASCII characters. */
| CODING_CATEGORY_MASK_ISO_7 \
| CODING_CATEGORY_MASK_ISO_8_1 \
| CODING_CATEGORY_MASK_ISO_8_2 \
- | CODING_CATEGORY_MASK_ISO_ELSE \
+ | CODING_CATEGORY_MASK_ISO_7_ELSE \
+ | CODING_CATEGORY_MASK_ISO_8_ELSE \
| CODING_CATEGORY_MASK_BIG5)
/* Macros to decode or encode a character of JISX0208 in SJIS. S1 and
extern char *conversion_buffer, *get_conversion_buffer ();
extern Lisp_Object Fcheck_coding_system ();
extern Lisp_Object Qcoding_system, Qeol_type, Qcoding_category_index;
+extern Lisp_Object Qemacs_mule;
extern Lisp_Object Qbuffer_file_coding_system;
extern Lisp_Object Vcoding_category_list;
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'. */
HCoop / bpt / emacs.git / blobdiff