From 2b008529edd233bac07a58d557869ae902be1818 Mon Sep 17 00:00:00 2001
From: Akim Demaille <demaille@gostai.com>
Date: Thu, 11 Dec 2008 09:37:40 +0100
Subject: [PATCH] Propagate i18n changes into glr.c.

	* TODO: Update.
	* data/glr.c (yyreportSyntaxError): Use "switch" instead of
	building the error message format dynamically.
	* data/lalr1.java: Formatting changes.
---
 ChangeLog       |  8 ++++++++
 TODO            |  4 ++--
 data/glr.c      | 51 +++++++++++++++++++++++++++----------------------
 data/lalr1.java |  2 +-
 4 files changed, 39 insertions(+), 26 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index dd650dfe..6edfdab7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2008-12-11  Akim Demaille  <demaille@gostai.com>
+
+	Propagate i18n changes into glr.c.
+	* TODO: Update.
+	* data/glr.c (yyreportSyntaxError): Use "switch" instead of
+	building the error message format dynamically.
+	* data/lalr1.java: Formatting changes.
+
 2008-12-11  Akim Demaille  <demaille@gostai.com>
 
 	Use testsuite -C.
diff --git a/TODO b/TODO
index a9ec3083..b12a039a 100644
--- a/TODO
+++ b/TODO
@@ -161,8 +161,8 @@ In lalr1.cc we invoke it with the translated lookahead (yytoken), and
 yacc.c uses yychar.  I don't see why.
 
 ** yysyntax_error
-The use of switch to select yyfmt in lalr1.cc seems simpler than
-what's done in yacc.c.
+The code bw glr.c and yacc.c is really alike, we can certainly factor
+some parts.
 
 * Header guards
 
diff --git a/data/glr.c b/data/glr.c
index 9998612b..6fd561e4 100644
--- a/data/glr.c
+++ b/data/glr.c
@@ -2043,18 +2043,10 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 	  yybool yysize_overflow = yyfalse;
 	  char* yymsg = NULL;
 	  enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
+          /* Internationalized format string. */
+          const char *yyformat = 0;
+          /* Arguments of yyformat. */
 	  char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
-	  int yyx;
-	  char *yyfmt;
-	  char const *yyf;
-	  static char const yyunexpected[] = "syntax error, unexpected %s";
-	  static char const yyexpecting[] = ", expecting %s";
-	  static char const yyor[] = " or %s";
-	  char yyformat[sizeof yyunexpected
-			+ sizeof yyexpecting - 1
-			+ ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2)
-			   * (sizeof yyor - 1))];
-	  char const *yyprefix = yyexpecting;
 
 	  /* Start YYX at -YYN if negative to avoid negative indexes in
 	     YYCHECK.  */
@@ -2063,10 +2055,13 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 	  /* Stay within bounds of both yycheck and yytname.  */
 	  int yychecklim = YYLAST - yyn + 1;
 	  int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
-	  int yycount = 1;
 
-	  yyarg[0] = yytokenName (yytoken);
-	  yyfmt = yystpcpy (yyformat, yyunexpected);
+          /* Number of reported tokens (one for the "unexpected", one per
+             "expected"). */
+          int yycount = 0;
+          int yyx;
+
+	  yyarg[yycount++] = yytokenName (yytoken);
 
 	  for (yyx = yyxbegin; yyx < yyxend; ++yyx)
 	    if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
@@ -2075,19 +2070,29 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 		  {
 		    yycount = 1;
 		    yysize = yysize0;
-		    yyformat[sizeof yyunexpected - 1] = '\0';
 		    break;
 		  }
 		yyarg[yycount++] = yytokenName (yyx);
 		yysize1 = yysize + yytnamerr (NULL, yytokenName (yyx));
 		yysize_overflow |= yysize1 < yysize;
 		yysize = yysize1;
-		yyfmt = yystpcpy (yyfmt, yyprefix);
-		yyprefix = yyor;
 	      }
 
-	  yyf = YY_(yyformat);
-	  yysize1 = yysize + strlen (yyf);
+          switch (yycount)
+            {
+#define YYCASE_(N, S)                           \
+              case N:                           \
+                yyformat = S;                   \
+              break
+              YYCASE_(1, YY_("syntax error, unexpected %s"));
+              YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
+              YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
+              YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
+              YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
+#undef YYCASE_
+            }
+
+	  yysize1 = yysize + strlen (yyformat);
 	  yysize_overflow |= yysize1 < yysize;
 	  yysize = yysize1;
 
@@ -2098,17 +2103,17 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
 	    {
 	      char *yyp = yymsg;
 	      int yyi = 0;
-	      while ((*yyp = *yyf))
+	      while ((*yyp = *yyformat))
 		{
-		  if (*yyp == '%' && yyf[1] == 's' && yyi < yycount)
+		  if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
 		    {
 		      yyp += yytnamerr (yyp, yyarg[yyi++]);
-		      yyf += 2;
+		      yyformat += 2;
 		    }
 		  else
 		    {
 		      yyp++;
-		      yyf++;
+		      yyformat++;
 		    }
 		}
 	      yyerror (]b4_lyyerror_args[yymsg);
diff --git a/data/lalr1.java b/data/lalr1.java
index af3cd12e..b89a4233 100644
--- a/data/lalr1.java
+++ b/data/lalr1.java
@@ -757,7 +757,7 @@ m4_popdef([b4_at_dollar])])dnl
                       res.append (yytnamerr_ (yytname_[x]));
                     }
               }
-        return res.toString ();
+            return res.toString ();
           }
       }
 ]])[
-- 
2.45.2