/* Declarations having to do with GNU Emacs syntax tables.
- Copyright (C) 1985 Free Software Foundation, Inc.
+ Copyright (C) 1985, 1993, 1994 Free Software Foundation, Inc.
This file is part of GNU Emacs.
Scharquote, /* for a character that quotes the following character */
Scomment, /* for a comment-starting character */
Sendcomment, /* for a comment-ending character */
+ Sinherit, /* use the standard syntax table for this character */
Smax /* Upper bound on codes that are meaningful */
};
-#define SYNTAX(c) \
- ((enum syntaxcode) (XINT (XVECTOR (current_buffer->syntax_table)->contents[(unsigned char) (c)]) & 0377))
+#define RAW_SYNTAX(table, c) \
+ ((enum syntaxcode) (XINT (XVECTOR (table)->contents[(unsigned char) (c)]) & 0377))
+
+#ifdef __GNUC__
+#define SYNTAX(c) \
+ ({ unsigned char character = c; \
+ enum syntaxcode syntax \
+ = RAW_SYNTAX (current_buffer->syntax_table, character); \
+ if (syntax == Sinherit) \
+ syntax = RAW_SYNTAX (Vstandard_syntax_table, character); \
+ syntax; })
+#else
+#define SYNTAX(c) \
+ (RAW_SYNTAX (current_buffer->syntax_table, c) == Sinherit \
+ ? RAW_SYNTAX (Vstandard_syntax_table, c) \
+ : RAW_SYNTAX (current_buffer->syntax_table, c))
+#endif
/* The next 8 bits of the number is a character,
the matching delimiter in the case of Sopen or Sclose. */
-#define SYNTAX_MATCH(c) \
- ((XINT (XVECTOR (current_buffer->syntax_table)->contents[(unsigned char) (c)]) >> 8) & 0377)
-
-/* Then there are five single-bit flags that have the following meanings:
+#define RAW_SYNTAX_MATCH(table, c) \
+ ((XINT (XVECTOR (table)->contents[(unsigned char) (c)]) >> 8) & 0377)
+
+#ifdef __GNUC__
+#define SYNTAX_MATCH(c) \
+ ({ unsigned char character = c; \
+ enum syntaxcode syntax \
+ = RAW_SYNTAX (current_buffer->syntax_table, character); \
+ int matcher; \
+ if (syntax == Sinherit) \
+ matcher = RAW_SYNTAX_MATCH (Vstandard_syntax_table, character); \
+ else \
+ matcher = RAW_SYNTAX_MATCH (current_buffer->syntax_table, character); \
+ matcher; })
+#else
+#define SYNTAX_MATCH(c) \
+ (RAW_SYNTAX (current_buffer->syntax_table, c) == Sinherit \
+ ? RAW_SYNTAX_MATCH (Vstandard_syntax_table, c) \
+ : RAW_SYNTAX_MATCH (current_buffer->syntax_table, c))
+#endif
+
+/* Then there are six single-bit flags that have the following meanings:
1. This character is the first of a two-character comment-start sequence.
2. This character is the second of a two-character comment-start sequence.
3. This character is the first of a two-character comment-end sequence.
4. This character is the second of a two-character comment-end sequence.
5. This character is a prefix, for backward-prefix-chars.
- Note that any two-character sequence whose first character has flag 1
- and whose second character has flag 2 will be interpreted as a comment start. */
+ Note that any two-character sequence whose first character has flag 1
+ and whose second character has flag 2 will be interpreted as a comment start.
+
+ bit 6 is used to discriminate between two different comment styles.
+ Languages such as C++ allow two orthogonal syntax start/end pairs
+ and bit 6 is used to determine whether a comment-end or Scommentend
+ ends style a or b. Comment start sequences can start style a or b.
+ Style a is always the default.
+ */
+
+#define SYNTAX_CHOOSE_TABLE(c) \
+ (RAW_SYNTAX (current_buffer->syntax_table, c) == Sinherit \
+ ? Vstandard_syntax_table : current_buffer->syntax_table)
+
+#ifdef __GNUC__
+
+#define SYNTAX_COMSTART_FIRST(c) \
+ ({ unsigned char ch = c; \
+ Lisp_Object table = SYNTAX_CHOOSE_TABLE (ch); \
+ (XINT (XVECTOR (table)->contents[ch]) >> 16) & 1; \
+ })
+
+#define SYNTAX_COMSTART_SECOND(c) \
+ ({ unsigned char ch = c; \
+ Lisp_Object table = SYNTAX_CHOOSE_TABLE (ch); \
+ (XINT (XVECTOR (table)->contents[ch]) >> 17) & 1; \
+ })
+
+#define SYNTAX_COMEND_FIRST(c) \
+ ({ unsigned char ch = c; \
+ Lisp_Object table = SYNTAX_CHOOSE_TABLE (ch); \
+ (XINT (XVECTOR (table)->contents[ch]) >> 18) & 1; \
+ })
+
+#define SYNTAX_COMEND_SECOND(c) \
+ ({ unsigned char ch = c; \
+ Lisp_Object table = SYNTAX_CHOOSE_TABLE (ch); \
+ (XINT (XVECTOR (table)->contents[ch]) >> 19) & 1; \
+ })
+
+#define SYNTAX_PREFIX(c) \
+ ({ unsigned char ch = c; \
+ Lisp_Object table = SYNTAX_CHOOSE_TABLE (ch); \
+ (XINT (XVECTOR (table)->contents[ch]) >> 20) & 1; \
+ })
+
+/* extract the comment style bit from the syntax table entry */
+#define SYNTAX_COMMENT_STYLE(c) \
+ ({ unsigned char ch = c; \
+ Lisp_Object table = SYNTAX_CHOOSE_TABLE (ch); \
+ (XINT (XVECTOR (table)->contents[ch]) >> 21) & 1; \
+ })
+
+#else
#define SYNTAX_COMSTART_FIRST(c) \
- ((XINT (XVECTOR (current_buffer->syntax_table)->contents[(unsigned char) (c)]) >> 16) & 1)
+ ((XINT (XVECTOR (SYNTAX_CHOOSE_TABLE (c))->contents[(unsigned char) (c)]) >> 16) & 1)
#define SYNTAX_COMSTART_SECOND(c) \
- ((XINT (XVECTOR (current_buffer->syntax_table)->contents[(unsigned char) (c)]) >> 17) & 1)
+ ((XINT (XVECTOR (SYNTAX_CHOOSE_TABLE (c))->contents[(unsigned char) (c)]) >> 17) & 1)
#define SYNTAX_COMEND_FIRST(c) \
- ((XINT (XVECTOR (current_buffer->syntax_table)->contents[(unsigned char) (c)]) >> 18) & 1)
+ ((XINT (XVECTOR (SYNTAX_CHOOSE_TABLE (c))->contents[(unsigned char) (c)]) >> 18) & 1)
#define SYNTAX_COMEND_SECOND(c) \
- ((XINT (XVECTOR (current_buffer->syntax_table)->contents[(unsigned char) (c)]) >> 19) & 1)
+ ((XINT (XVECTOR (SYNTAX_CHOOSE_TABLE (c))->contents[(unsigned char) (c)]) >> 19) & 1)
#define SYNTAX_PREFIX(c) \
- ((XINT (XVECTOR (current_buffer->syntax_table)->contents[(unsigned char) (c)]) >> 20) & 1)
+ ((XINT (XVECTOR (SYNTAX_CHOOSE_TABLE (c))->contents[(unsigned char) (c)]) >> 20) & 1)
+
+/* extract the comment style bit from the syntax table entry */
+#define SYNTAX_COMMENT_STYLE(c) \
+ ((XINT (XVECTOR (SYNTAX_CHOOSE_TABLE (c))->contents[(unsigned char) (c)]) >> 21) & 1)
+
+#endif
/* This array, indexed by a character, contains the syntax code which that
character signifies (as a char). For example,
/* Indexed by syntax code, give the letter that describes it. */
-extern char syntax_code_spec[13];
+extern char syntax_code_spec[14];
HCoop / bpt / emacs.git / blobdiff