[src/trunk]: src/usr.bin/config - simplify string parsing

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/64d031b38d05
branches:  trunk
changeset: 803677:64d031b38d05
user:      christos <christos%NetBSD.org@localhost>
date:      Fri Nov 07 17:50:14 2014 +0000

description:
- simplify string parsing
- emalloc + sprintf = easprintf

diffstat:

 usr.bin/config/scan.l |  27 ++++++++++++---------------
 1 files changed, 12 insertions(+), 15 deletions(-)

diffs (73 lines):

diff -r caeb89746c82 -r 64d031b38d05 usr.bin/config/scan.l
--- a/usr.bin/config/scan.l     Fri Nov 07 16:41:17 2014 +0000
+++ b/usr.bin/config/scan.l     Fri Nov 07 17:50:14 2014 +0000
@@ -1,5 +1,5 @@
 %{
-/*     $NetBSD: scan.l,v 1.21 2014/10/31 07:38:36 uebayasi Exp $       */
+/*     $NetBSD: scan.l,v 1.22 2014/11/07 17:50:14 christos Exp $       */
 
 /*
  * Copyright (c) 1992, 1993
@@ -42,7 +42,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: scan.l,v 1.21 2014/10/31 07:38:36 uebayasi Exp $");
+__RCSID("$NetBSD: scan.l,v 1.22 2014/11/07 17:50:14 christos Exp $");
 
 #include <sys/param.h>
 #include <errno.h>
@@ -111,12 +111,12 @@
 
 %}
 
-%option  noyywrap
+%option  noyywrap nounput noinput
 
 PATH   [A-Za-z_0-9]*[./][-A-Za-z_0-9./]*
-QCHARS ([^"\n]|\\\")+
+QCHARS \"(\\.|[^\\"])*\" 
 WORD   [A-Za-z_][-A-Za-z_0-9]*
-FILENAME       ({PATH}|\"{QCHARS}\")
+FILENAME       ({PATH}|{QCHARS})
 RESTOFLINE     [ \t]*(#[^\n]*)?\n
 
 %x     IGNORED
@@ -323,12 +323,11 @@
                return EMPTYSTRING;
        }
 
-\"{QCHARS}     {
-               tok = input();  /* eat closing quote */
-               if (tok != '"') {
-                       cfgerror("closing quote missing\n");
-                       unput(tok);
-               }
+{QCHARS}       {
+               size_t l = strlen(yytext);
+               if (l > 1 && yytext[l - 1] == '"')
+                       yytext[l - 1] = '\0';
+
                yylval.str = intern(yytext + 1);
                return QSTRING;
        }
@@ -401,8 +400,7 @@
                        free(f);
                        return (-1);
                }
-               p = emalloc(strlen(cwd) + strlen(d) + 2);
-               sprintf(p, "%s/%s", cwd, d);
+               easprintf(&p, "%s/%s", cwd, d);
        }
        free(f);
        pf = ecalloc(1, sizeof(*pf));
@@ -502,8 +500,7 @@
                s = estrdup(fname);
        else if (fname[0] == '.' && fname[1] == '/') {
                struct prefix *pf = SLIST_FIRST(&curdirs);
-               s = emalloc(strlen(pf->pf_prefix) + strlen(fname));
-               sprintf(s, "%s/%s", pf->pf_prefix, fname + 2);
+               easprintf(&s, "%s/%s", pf->pf_prefix, fname + 2);
        } else
                s = sourcepath(fname);
        if ((fp = fopen(s, "r")) == NULL) {