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authornobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2007-09-25 20:12:19 +0000
committernobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2007-09-25 20:12:19 +0000
commit8ca32b6e6e95f650ccb5c8bfcf15bbc9802ac3d0 (patch)
tree547da6fa2ad79bfa6d5c52d3a92999bf870365be /parse.y
parentb0001e921299e8f443a9d716d1c4367da3279f4d (diff)
* parse.y (yyerror): limit error message length. [ruby-dev:31848]
* regex.c (re_mbc_startpos): separated from re_adjust_startpos. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@13513 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'parse.y')
-rw-r--r--parse.y29
1 files changed, 23 insertions, 6 deletions
diff --git a/parse.y b/parse.y
index 157aefc..f6c6311 100644
--- a/parse.y
+++ b/parse.y
@@ -2516,7 +2516,9 @@ static int
yyerror(msg)
const char *msg;
{
- char *p, *pe, *buf;
+ const int max_line_margin = 30;
+ const char *p, *pe;
+ char *buf;
int len, i;
rb_compile_error("%s", msg);
@@ -2535,17 +2537,32 @@ yyerror(msg)
len = pe - p;
if (len > 4) {
+ char *p2;
+ const char *pre = "", *post = "";
+
+ if (len > max_line_margin * 2 + 10) {
+ int re_mbc_startpos _((const char *, int, int, int));
+ if ((len = lex_p - p) > max_line_margin) {
+ p = p + re_mbc_startpos(p, len, len - max_line_margin, 0);
+ pre = "...";
+ }
+ if ((len = pe - lex_p) > max_line_margin) {
+ pe = lex_p + re_mbc_startpos(lex_p, len, max_line_margin, 1);
+ post = "...";
+ }
+ len = pe - p;
+ }
buf = ALLOCA_N(char, len+2);
MEMCPY(buf, p, char, len);
buf[len] = '\0';
- rb_compile_error_append("%s", buf);
+ rb_compile_error_append("%s%s%s", pre, buf, post);
i = lex_p - p;
- p = buf; pe = p + len;
+ p2 = buf; pe = buf + len;
- while (p < pe) {
- if (*p != '\t') *p = ' ';
- p++;
+ while (p2 < pe) {
+ if (*p2 != '\t') *p2 = ' ';
+ p2++;
}
buf[i] = '^';
buf[i+1] = '\0';