From: Richard M. Stallman <rms@gnu.org>
Date: Fri, 16 Jan 1998 17:52:16 +0000 (+0000)
Subject: (SYNTAX_TABLE_BYTE_TO_CHAR): New macro.
X-Git-Tag: emacs-20.3~2425
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=c292db29eb2df4d3cee5908342a501f0a86e3693;p=emacs.git

(SYNTAX_TABLE_BYTE_TO_CHAR): New macro.

(struct gl_state_s): New field `object'.
(SETUP_SYNTAX_TABLE_FOR_OBJECT): Set it.
Handle non-current buffer properly.  Args renamed to all caps.
(SETUP_SYNTAX_TABLE): Set `object'.  Args renamed to all caps.
(UPDATE_SYNTAX_TABLE): Use gl_state.object.
(UPDATE_SYNTAX_TABLE_FORWARD, UPDATE_SYNTAX_TABLE_BACKWARD): Likewise.

(SETUP_SYNTAX_TABLE_FOR_OBJECT): Add gl_state.offset
when using the arg FROM.  Use BYTE_TO_CHAR.
---

diff --git a/src/syntax.h b/src/syntax.h
index da243e8cce5..d1acaa33994 100644
--- a/src/syntax.h
+++ b/src/syntax.h
@@ -194,27 +194,50 @@ extern unsigned char syntax_spec_code[0400];
 
 extern char syntax_code_spec[16];
 
+/* Convert the byte offset BYTEPOS into a character position,
+   for the object recorded in gl_state with SETUP_SYNTAX_TABLE_FOR_OBJECT.  */
+
+#define SYNTAX_TABLE_BYTE_TO_CHAR(bytepos)				\
+  (STRINGP (gl_state.object)						\
+   ? string_byte_to_char (gl_state.object, (bytepos))			\
+   : BUFFERP (gl_state.object)						\
+   ? buf_bytepos_to_charpos (XBUFFER (gl_state.object), (bytepos))	\
+   : NILP (gl_state.object)						\
+   ? BYTE_TO_CHAR ((bytepos))						\
+   : (bytepos))
+
 /* Make syntax table state (gl_state) good for POS, assuming it is
    currently good for a position before POS.  */
 
-#define UPDATE_SYNTAX_TABLE_FORWARD(pos)		\
-  ((pos) >= gl_state.e_property - gl_state.offset	\
-   ? (update_syntax_table ((pos) + gl_state.offset, 1, 0, Qnil), 1) : 0)
+#define UPDATE_SYNTAX_TABLE_FORWARD(pos)			\
+  ((pos) >= gl_state.e_property - gl_state.offset		\
+   ? (update_syntax_table ((pos) + gl_state.offset, 1, 0,	\
+			   gl_state.object),			\
+      1)							\
+   : 0)
 
 /* Make syntax table state (gl_state) good for POS, assuming it is
    currently good for a position after POS.  */
 
-#define UPDATE_SYNTAX_TABLE_BACKWARD(pos)		\
-  ((pos) <= gl_state.b_property - gl_state.offset	\
-   ? (update_syntax_table ((pos) + gl_state.offset, -1, 0, Qnil), 1) : 0)
+#define UPDATE_SYNTAX_TABLE_BACKWARD(pos)			\
+  ((pos) <= gl_state.b_property - gl_state.offset		\
+   ? (update_syntax_table ((pos) + gl_state.offset, -1, 0,	\
+			   gl_state.object),			\
+      1)							\
+   : 0)
 
 /* Make syntax table good for POS.  */
 
-#define UPDATE_SYNTAX_TABLE(pos)					\
-  ((pos) <= gl_state.b_property - gl_state.offset			\
-   ? (update_syntax_table ((pos) + gl_state.offset, -1, 0, Qnil), 1)	\
-   : ((pos) >= gl_state.e_property - gl_state.offset			\
-      ? (update_syntax_table ((pos) + gl_state.offset, 1, 0, Qnil), 1) : 0))
+#define UPDATE_SYNTAX_TABLE(pos)				\
+  ((pos) <= gl_state.b_property - gl_state.offset		\
+   ? (update_syntax_table ((pos) + gl_state.offset, -1, 0,	\
+			   gl_state.object),			\
+      1)							\
+   : ((pos) >= gl_state.e_property - gl_state.offset		\
+      ? (update_syntax_table ((pos) + gl_state.offset, 1, 0,	\
+			      gl_state.object),			\
+	 1)							\
+      : 0))
 
 /* This macro should be called with FROM at the start of forward
    search, or after the last position of the backward search.  It
@@ -224,14 +247,15 @@ extern char syntax_code_spec[16];
    Sign of COUNT gives the direction of the search.
  */
 
-#define SETUP_SYNTAX_TABLE(from,count)					\
+#define SETUP_SYNTAX_TABLE(FROM, COUNT)					\
   gl_state.b_property = BEGV - 1;					\
   gl_state.e_property = ZV + 1;						\
+  gl_state.object = Qnil;						\
   gl_state.use_global = 0;						\
   gl_state.offset = 0;							\
   gl_state.current_syntax_table = current_buffer->syntax_table;		\
   if (parse_sexp_lookup_properties) 					\
-    update_syntax_table ((count) > 0 ? (from) : (from) - 1, (count),	\
+    update_syntax_table ((COUNT) > 0 ? (FROM) : (FROM) - 1, (COUNT),	\
 			 1, Qnil);
 
 /* Same as above, but in OBJECT.  If OBJECT is nil, use current buffer.
@@ -241,16 +265,24 @@ extern char syntax_code_spec[16];
    to the UPDATE_SYNTAX_TABLE macros which are relative to BEGV.
    So if it is a buffer, we set the offset field to BEGV.  */
 
-#define SETUP_SYNTAX_TABLE_FOR_OBJECT(object, from, count)		\
+#define SETUP_SYNTAX_TABLE_FOR_OBJECT(OBJECT, FROM, COUNT)		\
 if (1)									\
   {									\
-    if (BUFFERP (object) || NILP (object))				\
+    gl_state.object = (OBJECT);						\
+    if (BUFFERP (gl_state.object))					\
+      {									\
+	struct buffer *buf = XBUFFER (gl_state.object);			\
+	gl_state.b_property = BUF_BEGV (buf) - 1;			\
+	gl_state.e_property = BUF_ZV (buf);				\
+	gl_state.offset = BUF_BEGV (buf) - 1;				\
+      }									\
+    else if (NILP (gl_state.object))					\
       {									\
 	gl_state.b_property = BEGV - 1;					\
 	gl_state.e_property = ZV;					\
 	gl_state.offset = BEGV - 1;					\
       }									\
-    else if (EQ (object, Qt))						\
+    else if (EQ (gl_state.object, Qt))					\
       {									\
 	gl_state.b_property = - 1;					\
 	gl_state.e_property = 1500000000;				\
@@ -259,20 +291,21 @@ if (1)									\
     else								\
       {									\
 	gl_state.b_property = -1;					\
-	gl_state.e_property = 1 + XSTRING (object)->size;		\
+	gl_state.e_property = 1 + XSTRING (gl_state.object)->size;	\
 	gl_state.offset = 0;						\
       }									\
     gl_state.use_global = 0;						\
     gl_state.current_syntax_table = current_buffer->syntax_table;	\
     if (parse_sexp_lookup_properties)					\
-      update_syntax_table ((bytepos_to_charpos (from)			\
-			    + (count > 0 ? 0 :  -1)),			\
-			   count, 1, object);				\
+      update_syntax_table ((BYTE_TO_CHAR ((FROM) + gl_state.offset)	\
+			    + (COUNT > 0 ? 0 :  -1)),			\
+			   COUNT, 1, gl_state.object);			\
   }									\
 else
 
 struct gl_state_s
 {
+  Lisp_Object object;			/* The object we are scanning. */
   int start;				/* Where to stop. */
   int stop;				/* Where to stop. */
   int use_global;			/* Whether to use global_code