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 == `?' */
/* 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];
/* Macros to access each field in the structure `spec.iso2022'. */
#define CODING_SPEC_ISO_INVOCATION(coding, plane) \
- coding->spec.iso2022.current_invocation[plane]
+ (coding)->spec.iso2022.current_invocation[plane]
#define CODING_SPEC_ISO_DESIGNATION(coding, reg) \
- coding->spec.iso2022.current_designation[reg]
+ (coding)->spec.iso2022.current_designation[reg]
#define CODING_SPEC_ISO_INITIAL_DESIGNATION(coding, reg) \
- coding->spec.iso2022.initial_designation[reg]
+ (coding)->spec.iso2022.initial_designation[reg]
#define CODING_SPEC_ISO_REQUESTED_DESIGNATION(coding, charset) \
- coding->spec.iso2022.requested_designation[charset]
+ (coding)->spec.iso2022.requested_designation[charset]
#define CODING_SPEC_ISO_REVISION_NUMBER(coding, charset) \
- coding->spec.iso2022.charset_revision_number[charset]
+ (coding)->spec.iso2022.charset_revision_number[charset]
#define CODING_SPEC_ISO_SINGLE_SHIFTING(coding) \
- coding->spec.iso2022.single_shifting
+ (coding)->spec.iso2022.single_shifting
#define CODING_SPEC_ISO_BOL(coding) \
- coding->spec.iso2022.bol
+ (coding)->spec.iso2022.bol
/* A value which may appear in
coding->spec.iso2022.requested_designation indicating that the
/* 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
+
+/* Macros used for the member mode of the struct coding_systme. */
+
+/* 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 any type of coding systems. */
+ 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;
- /* Type of end-of-line format (LF, CRLF, or CR) of the coding system. */
- int eol_type;
+ /* 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 an safe character set.
+ 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 the current source text is the last block of the
- whole text to be converted. */
- int last_block;
-
/* 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;
- /* 0 (left-to-right) or 1 (right-to-left): the direction of the text
- being processed currently. */
- int direction;
-
- /* Non-zero means that the current source text is in a buffer which
- enables selective display. */
- int selective;
-
/* Detailed information specific to each type of coding system. */
union spec
{
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 member is
+ set by the function detect_coding. The initial value is -1 which
+ means detect_coding has not yet been called. */
+ int heading_ascii;
+
+ /* The following members are set by encoding/decoding routine. */
+ int produced, produced_char, consumed, consumed_char;
+
+ /* 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. */
+ additional conversion, or nil. */
Lisp_Object post_read_conversion;
/* Lisp function (symbol) to be called before encoding to do
- additional conversion. */
+ additional conversion, or nil. */
Lisp_Object pre_write_conversion;
/* 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
- not include a text which is not processed because of short of
- output buffer. */
- char carryover[8];
-
- /* Actual data length in the above array. */
- int carryover_size;
};
#define CODING_REQUIRE_FLUSHING_MASK 1
#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_8_1 3
-#define CODING_CATEGORY_IDX_ISO_8_2 4
-#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_RAW_TEXT 8
-#define CODING_CATEGORY_IDX_BINARY 9
-#define CODING_CATEGORY_IDX_MAX 10
+#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_BIG5 8
+#define CODING_CATEGORY_IDX_RAW_TEXT 9
+#define CODING_CATEGORY_IDX_BINARY 10
+#define CODING_CATEGORY_IDX_MAX 11
/* 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)
( 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_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'
/* Extern declarations. */
extern int decode_coding P_ ((struct coding_system *, unsigned char *,
- unsigned char *, int, int, int *));
+ unsigned char *, int, int));
extern int encode_coding P_ ((struct coding_system *, unsigned char *,
- unsigned char *, int, int, int *));
+ unsigned char *, 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 char *get_conversion_buffer P_ ((int));
extern int setup_coding_system P_ ((Lisp_Object, struct coding_system *));
extern Lisp_Object Qcoding_system, Qeol_type, Qcoding_category_index;
-extern Lisp_Object Qemacs_mule;
+extern Lisp_Object Qraw_text;
extern Lisp_Object Qbuffer_file_coding_system;
extern Lisp_Object Vcoding_category_list;
/* Mnemonic character to indicate type of end-of-line is not yet decided. */
extern int eol_mnemonic_undecided;
-/* Table of coding-systems currently assigned to each coding-category. */
-extern Lisp_Object coding_category_table[CODING_CATEGORY_IDX_MAX];
-/* Table of names of symbol for each coding-category. */
-extern char *coding_category_name[CODING_CATEGORY_IDX_MAX];
-
#ifdef emacs
extern Lisp_Object Qfile_coding_system;
extern Lisp_Object Qcall_process, Qcall_process_region, Qprocess_argument;
/* 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;
+
#endif
#endif /* _CODING_H */
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