Enhancement (bug #2407) Make error messages more clear.

ChangeLog

@@ -1,3 +1,13 @@
+2003-01-30  Paul D. Smith  <psmith@gnu.org>
+
+	* function.c (check_numeric): Combine the is_numeric() function
+	into this function, since it's only called from one place.
+	Constify this function.  Have it print the incorrect string in the
+	error message.  Fixes bug #2407.
+	(strip_whitespace): Constify.
+	(func_if): Constify.
+	* expand.c (expand_argument): Constify.
+
 2003-01-29  Paul D. Smith  <psmith@gnu.org>
 
 	Fix bug # 2169, also reported by other people on various systems.

expand.c

@@ -411,7 +411,7 @@ variable_expand (char *line)
    variable-expansion that is in progress.  */
 
 char *
-expand_argument (char *str, char *end)
+expand_argument (const char *str, const char *end)
 {
   char *tmp;
 
@@ -419,13 +419,11 @@ expand_argument (char *str, char *end)
     return xstrdup("");
 
   if (!end || *end == '\0')
-    tmp = str;
-  else
-    {
-      tmp = (char *) alloca (end - str + 1);
-      bcopy (str, tmp, end - str);
-      tmp[end - str] = '\0';
-    }
+    return allocated_variable_expand ((char *)str);
+
+  tmp = (char *) alloca (end - str + 1);
+  bcopy (str, tmp, end - str);
+  tmp[end - str] = '\0';
 
   return allocated_variable_expand (tmp);
 }

function.c

@@ -673,35 +673,29 @@ func_words (char *o, char **argv, const char *funcname)
   return o;
 }
 
-char *
-strip_whitespace (char **begpp, char **endpp)
+static char *
+strip_whitespace (const char **begpp, const char **endpp)
 {
   while (isspace ((unsigned char)**begpp) && *begpp <= *endpp)
     (*begpp) ++;
   while (isspace ((unsigned char)**endpp) && *endpp >= *begpp)
     (*endpp) --;
-  return *begpp;
+  return (char *)*begpp;
 }
 
-int
-is_numeric (char *p)
+static void
+check_numeric (const char *s, const char *message)
 {
-  char *end = p + strlen (p) - 1;
-  char *beg = p;
-  strip_whitespace (&p, &end);
+  const char *end = s + strlen (s) - 1;
+  const char *beg = s;
+  strip_whitespace (&s, &end);
 
-  while (p <= end)
-    if (!ISDIGIT (*(p++)))  /* ISDIGIT only evals its arg once: see make.h.  */
-      return 0;
+  for (; s <= end; ++s)
+    if (!ISDIGIT (*s))  /* ISDIGIT only evals its arg once: see make.h.  */
+      break;
 
-  return (end - beg >= 0);
-}
-
-void
-check_numeric (char *s, char *message)
-{
-  if (!is_numeric (s))
-    fatal (reading_file, message);
+  if (s <= end || end - beg < 0)
+    fatal (reading_file, "%s: '%s'", message, beg);
 }
 
 
@@ -1134,8 +1128,8 @@ func_sort (char *o, char **argv, const char *funcname)
 static char *
 func_if (char *o, char **argv, const char *funcname)
 {
-  char *begp = argv[0];
-  char *endp = begp + strlen (argv[0]);
+  const char *begp = argv[0];
+  const char *endp = begp + strlen (argv[0]);
   int result = 0;
 
   /* Find the result of the condition: if we have a value, and it's not

tests/ChangeLog

@@ -1,3 +1,8 @@
+2003-01-30  Paul D. Smith  <psmith@gnu.org>
+
+	* scripts/functions/word: Test error handling for word and
+	wordlist functions (bug #2407).
+
 2003-01-22  Paul D. Smith  <psmith@gnu.org>
 
 	* scripts/functions/call: Test recursive argument masking (bug

tests/scripts/functions/word

@@ -6,9 +6,6 @@ Produce a variable with a large number of words in it,
 determine the number of words, and then read each one back.\n";
 
 open(MAKEFILE,"> $makefile");
-
-# The Contents of the MAKEFILE ...
-
 print MAKEFILE <<'EOF';
 string  := word.pl general_test2.pl   FORCE.pl word.pl generic_test.perl MAKEFILES_variable.pl
 string2 := $(string) $(string) $(string) $(string) $(string) $(string) $(string)
@@ -28,18 +25,9 @@ all:
 	@echo $(wordlist 100, 110, $(string))
 	@echo $(wordlist 7, 10, $(string2))
 EOF
-
-
-
-# END of Contents of MAKEFILE
-
 close(MAKEFILE);
 
 &run_make_with_options($makefile, "", &get_logfile);
-
-# Create the answer to what should be produced by this Makefile
-
-# COMPARE RESULTS
 $answer = "6\n"
          ."2058\n"
          ."word.pl\n"
@@ -51,13 +39,52 @@ $answer = "6\n"
 	 ."word.pl general_test2.pl FORCE.pl word.pl generic_test.perl MAKEFILES_variable.pl\n"
 	 ."generic_test.perl MAKEFILES_variable.pl\n"
 	 ."\n"
-	 ."word.pl general_test2.pl FORCE.pl word.pl\n"
-;
+	 ."word.pl general_test2.pl FORCE.pl word.pl\n";
+&compare_output($answer, &get_logfile(1));
 
-# In this call to compare output, you should use the call &get_logfile(1)
-# to send the name of the last logfile created.  You may also use
-# the special call &get_logfile(1) which returns the same as &get_logfile(1).
 
+# Test error conditions
+
+$makefile2 = &get_tmpfile;
+
+open(MAKEFILE, "> $makefile2");
+print MAKEFILE <<'EOF';
+FOO = foo bar biz baz
+
+word-e1: ; @echo $(word ,$(FOO))
+word-e2: ; @echo $(word abc ,$(FOO))
+word-e3: ; @echo $(word 1a,$(FOO))
+
+wordlist-e1: ; @echo $(wordlist ,,$(FOO))
+wordlist-e2: ; @echo $(wordlist abc ,,$(FOO))
+wordlist-e3: ; @echo $(wordlist 1, 12a ,$(FOO))
+
+EOF
+
+close(MAKEFILE);
+
+&run_make_with_options($makefile2, 'word-e1', &get_logfile, 512);
+$answer = "$makefile2:3: *** non-numeric first argument to `word' function: ''.  Stop.\n";
+&compare_output($answer, &get_logfile(1));
+
+&run_make_with_options($makefile2, 'word-e2', &get_logfile, 512);
+$answer = "$makefile2:4: *** non-numeric first argument to `word' function: 'abc '.  Stop.\n";
+&compare_output($answer, &get_logfile(1));
+
+&run_make_with_options($makefile2, 'word-e3', &get_logfile, 512);
+$answer = "$makefile2:5: *** non-numeric first argument to `word' function: '1a'.  Stop.\n";
+&compare_output($answer, &get_logfile(1));
+
+&run_make_with_options($makefile2, 'wordlist-e1', &get_logfile, 512);
+$answer = "$makefile2:7: *** non-numeric first argument to `wordlist' function: ''.  Stop.\n";
+&compare_output($answer, &get_logfile(1));
+
+&run_make_with_options($makefile2, 'wordlist-e2', &get_logfile, 512);
+$answer = "$makefile2:8: *** non-numeric first argument to `wordlist' function: 'abc '.  Stop.\n";
+&compare_output($answer, &get_logfile(1));
+
+&run_make_with_options($makefile2, 'wordlist-e3', &get_logfile, 512);
+$answer = "$makefile2:9: *** non-numeric second argument to `wordlist' function: ' 12a '.  Stop.\n";
 &compare_output($answer, &get_logfile(1));
 
 # This tells the test driver that the perl test script executed properly.

variable.h

@@ -104,7 +104,7 @@ extern char *variable_expand PARAMS ((char *line));
 extern char *allocated_variable_expand_for_file PARAMS ((char *line, struct file *file));
 #define	allocated_variable_expand(line) \
   allocated_variable_expand_for_file (line, (struct file *) 0)
-extern char *expand_argument PARAMS ((char *str, char *end));
+extern char *expand_argument PARAMS ((const char *str, const char *end));
 extern char *variable_expand_string PARAMS ((char *line, char *string,
                                              long length));
 extern void install_variable_buffer PARAMS ((char **bufp, unsigned int *lenp));