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texinfo/texinfo-5.1-b-tag-processing.patch
Vitezslav Crhonek b970e10e7a Fix \b[...\b] tag processing
2013-08-13 12:43:30 +02:00

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Index: info/nodes.c
===================================================================
--- info/nodes.c (revision 5245)
+++ info/nodes.c (revision 5246)
@@ -563,6 +563,7 @@
/* Okay, we have isolated the node name, and we know where the
node starts. Remember this information. */
entry = xmalloc (sizeof (TAG));
+ entry->content_cache = NULL;
entry->nodename = xmalloc (1 + (end - start));
strncpy (entry->nodename, nodeline + start, end - start);
entry->nodename[end - start] = 0;
@@ -667,6 +668,7 @@
break;
entry = xmalloc (sizeof (TAG));
+ entry->content_cache = NULL;
/* Find the beginning of the node definition. */
tmp_search->start += name_offset;
@@ -981,7 +983,12 @@
node->filename = subfile->fullpath;
node->parent = NULL;
node->nodename = tag->nodename;
- node->contents = subfile->contents + tag->nodestart;
+
+ if (tag->content_cache)
+ node->contents = tag->content_cache;
+ else
+ node->contents = subfile->contents + tag->nodestart;
+
node->display_pos = 0;
node->flags = 0;
node_set_body_start (node);
@@ -1049,6 +1056,12 @@
node_body.end = buff_end - node_body.buffer;
node_body.flags = 0;
tag->nodelen = get_node_length (&node_body);
+ /* Expand eventual \b[...\b] constructs in the contents.
+ If found, update node->contents to point to the resulting
+ buffer. */
+ if (tags_expand (node->contents, tag->nodelen,
+ &tag->content_cache, &tag->nodelen))
+ node->contents = tag->content_cache;
node->nodelen = tag->nodelen;
}
else if (tag->nodelen == 0) /* anchor, return containing node */
@@ -1173,7 +1186,8 @@
free_info_tag (TAG *tag)
{
free (tag->nodename);
-
+ free (tag->content_cache);
+
/* We don't free tag->filename, because that filename is part of the
subfiles list for the containing FILE_BUFFER. free_info_tags ()
will free the subfiles when it is appropriate. */
Index: info/tag.c
===================================================================
--- info/tag.c (revision 5245)
+++ info/tag.c (revision 5246)
@@ -113,6 +113,8 @@
if (state == state_delim)
continue;
}
+ else if (state == state_delim)
+ state = state_kw;
cur_len = mb_len (mbi_cur (iter));
cur_ptr = mbi_cur_ptr (iter);
@@ -125,6 +127,8 @@
switch (*cur_ptr)
{
case '=':
+ if (state != state_kw)
+ break;
text_buffer_add_char (&tmpbuf, 0);
kw = tmpbuf.base;
if (!mbi_avail (iter))
@@ -197,22 +201,29 @@
return NULL;
}
-void
-tags_expand (char **pbuf, size_t *pbuflen)
+/* Expand \b[...\b] constructs in INPUT (of INPUTLEN bytes). If encountered,
+ put the expanded text into PBUF, store its length in PBUFLEN, and return
+ 1. Otherwise, don't touch neither of the latter and return 0. */
+int
+tags_expand (char *input, size_t inputlen, char **pbuf, size_t *pbuflen)
{
- char *input = *pbuf;
- char *endp = input + *pbuflen;
+ char *endp = input + inputlen;
struct text_buffer outbuf;
+ int text_buffer_used = 0;
char *p;
- text_buffer_init (&outbuf);
-
while ((p = input + strlen (input)) < endp) /* go forward to null */
{
if (memcmp(p + 1, "\b[", 2) == 0) /* opening magic? */
{
char *q;
+ if (!text_buffer_used)
+ {
+ text_buffer_init (&outbuf);
+ text_buffer_used = 1;
+ }
+
p += 3;
q = p + strlen (p); /* forward to next null */
if (memcmp (q + 1, "\b]", 2) == 0) /* closing magic? */
@@ -227,10 +238,7 @@
while (p[len] == ' ' || p[len] == '\t')
++len; /* move past whitespace */
- if (!text_buffer_off (&outbuf))
- text_buffer_add_string (&outbuf, *pbuf, p - *pbuf - 3);
- else
- text_buffer_add_string (&outbuf, input, p - input - 3);
+ text_buffer_add_string (&outbuf, input, p - input - 3);
if (tp->handler (p + len, &outbuf) == 0)
{
input = q + 3;
@@ -240,21 +248,21 @@
}
}
- if (text_buffer_off (&outbuf))
- {
- text_buffer_add_string (&outbuf, input, p - input);
- }
+ if (text_buffer_used)
+ text_buffer_add_string (&outbuf, input, p - input);
+
input = p + 1;
}
- if (text_buffer_off (&outbuf))
+ if (text_buffer_used && text_buffer_off (&outbuf))
{
if (input < endp)
text_buffer_add_string (&outbuf, input, endp - input);
- free (*pbuf);
*pbuflen = text_buffer_off (&outbuf);
*pbuf = text_buffer_base (&outbuf);
+ return 1;
}
+ return 0;
}
void
Index: info/nodes.h
===================================================================
--- info/nodes.h (revision 5245)
+++ info/nodes.h (revision 5246)
@@ -90,6 +90,9 @@
char *nodename; /* The node pointed to by this tag. */
long nodestart; /* The offset of the start of this node. */
long nodelen; /* The length of this node. */
+ char *content_cache; /* Cache of the node contents; used if the
+ node contents must be preprocessed before
+ displaying it. */
} TAG;
/* The following structure is used to remember information about the contents
Index: info/filesys.c
===================================================================
--- info/filesys.c (revision 5245)
+++ info/filesys.c (revision 5246)
@@ -645,8 +645,6 @@
files are coming from some Windows system across a network. */
fsize = convert_eols (contents, fsize);
- tags_expand (&contents, &fsize);
-
/* EOL conversion can shrink the text quite a bit. We don't
want to waste storage. */
contents = xrealloc (contents, 1 + fsize);
Index: info/tag.h
===================================================================
--- info/tag.h (revision 5245)
+++ info/tag.h (revision 5246)
@@ -19,7 +19,7 @@
#ifndef TAG_H
#define TAG_H
-void tags_expand (char **pbuf, size_t *pbuflen);
+int tags_expand (char *input, size_t inputlen, char **pbuf, size_t *pbuflen);
void handle_tag (char *tag);
#endif
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