diff options
Diffstat (limited to 'src/syntax.h')
| -rw-r--r-- | src/syntax.h | 103 |
1 files changed, 92 insertions, 11 deletions
diff --git a/src/syntax.h b/src/syntax.h index 6ccafff64be..b3c92ca9979 100644 --- a/src/syntax.h +++ b/src/syntax.h @@ -45,17 +45,51 @@ enum syntaxcode 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 (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) +#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); \ + syntax; }) +#else +#define SYNTAX_MATCH(c) \ + (RAW_SYNTAX (current_buffer->syntax_table, c) == Sinherit \ + ? RAW_SYNTAX_MATCH (Vstandard_syntax_table, c) \ + : RAW_SYNTAX_MATCH (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. @@ -73,24 +107,71 @@ enum syntaxcode 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 (current_buffer->syntax_table)->contents[c]) >> 21) & 1) + ((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, @@ -100,4 +181,4 @@ extern unsigned char syntax_spec_code[0400]; /* Indexed by syntax code, give the letter that describes it. */ -extern char syntax_code_spec[13]; +extern char syntax_code_spec[14]; |