Replace all exit() with SWIG_exit()

For consistent cleanup on error

Source/Swig/getopt.c

@@ -16,7 +16,6 @@
  * sure there are no unmarked options.
  * 
  * TODO: 
- *     - This module needs to be modified so that it doesn't call exit().
  *       Should have cleaner error handling in general.
  * ----------------------------------------------------------------------------- */
 
@@ -88,11 +87,11 @@ void Swig_check_options(int check_input) {
   }
   if (error) {
     Printf(stderr, "Use 'swig -help' for available options.\n");
-    exit(1);
+    SWIG_exit(EXIT_FAILURE);
   }
   if (check_input && marked[numargs - 1]) {
     Printf(stderr, "Must specify an input file. Use -help for available options.\n");
-    exit(1);
+    SWIG_exit(EXIT_FAILURE);
   }
 }
 
@@ -105,5 +104,5 @@ void Swig_check_options(int check_input) {
 void Swig_arg_error(void) {
   Printf(stderr, "SWIG : Unable to parse command line options.\n");
   Printf(stderr, "Use 'swig -help' for available options.\n");
-  exit(1);
+  SWIG_exit(EXIT_FAILURE);
 }

Source/Swig/misc.c

@@ -1177,7 +1177,7 @@ String *Swig_string_command(String *s) {
       pclose(fp);
     } else {
       Swig_error("SWIG", Getline(s), "Command encoder fails attempting '%s'.\n", s);
-      exit(1);
+      SWIG_exit(EXIT_FAILURE);
     }
   }
 #endif
@@ -1327,7 +1327,8 @@ static int split_regex_pattern_subst(String *s, String **pattern, String **subst
 
 err_out:
   Swig_error("SWIG", Getline(s), "Invalid regex substitution: '%s'.\n", s);
-  exit(1);
+  SWIG_exit(EXIT_FAILURE);
+  return 0;
 }
 
 /* This function copies len characters from src to dst, possibly applying case conversions to them: if convertCase is 1, to upper case and if it is -1, to lower
@@ -1449,7 +1450,7 @@ String *Swig_string_regex(String *s) {
     if (!compiled_pat) {
       Swig_error("SWIG", Getline(s), "PCRE compilation failed: '%s' in '%s':%i.\n",
           pcre_error, Char(pattern), pcre_errorpos);
-      exit(1);
+      SWIG_exit(EXIT_FAILURE);
     }
     rc = pcre_exec(compiled_pat, NULL, input, (int)strlen(input), 0, 0, captures, 30);
     if (rc >= 0) {
@@ -1457,7 +1458,7 @@ String *Swig_string_regex(String *s) {
     } else if (rc != PCRE_ERROR_NOMATCH) {
       Swig_error("SWIG", Getline(s), "PCRE execution failed: error %d while matching \"%s\" using \"%s\".\n",
 	rc, Char(pattern), input);
-      exit(1);
+      SWIG_exit(EXIT_FAILURE);
     }
   }
 
@@ -1475,7 +1476,8 @@ String *Swig_pcre_version(void) {
 
 String *Swig_string_regex(String *s) {
   Swig_error("SWIG", Getline(s), "PCRE regex support not enabled in this SWIG build.\n");
-  exit(1);
+  SWIG_exit(EXIT_FAILURE);
+  return 0;
 }
 
 String *Swig_pcre_version(void) {

Source/Swig/naming.c

@@ -1105,7 +1105,7 @@ static int name_regexmatch_value(Node *n, String *pattern, String *s) {
     Swig_error("SWIG", Getline(n),
                "Invalid regex \"%s\": compilation failed at %d: %s\n",
                Char(pattern), errpos, err);
-    exit(1);
+    SWIG_exit(EXIT_FAILURE);
   }
 
   rc = pcre_exec(compiled_pat, NULL, Char(s), Len(s), 0, 0, NULL, 0);
@@ -1118,7 +1118,7 @@ static int name_regexmatch_value(Node *n, String *pattern, String *s) {
     Swig_error("SWIG", Getline(n),
                "Matching \"%s\" against regex \"%s\" failed: %d\n",
                Char(s), Char(pattern), rc);
-    exit(1);
+    SWIG_exit(EXIT_FAILURE);
   }
 
   return 1;
@@ -1131,7 +1131,7 @@ static int name_regexmatch_value(Node *n, String *pattern, String *s) {
   (void)s;
   Swig_error("SWIG", Getline(n),
              "PCRE regex matching is not available in this SWIG build.\n");
-  exit(1);
+  SWIG_exit(EXIT_FAILURE);
 }
 
 #endif /* HAVE_PCRE/!HAVE_PCRE */

Source/Swig/scanner.c

@@ -833,7 +833,7 @@ static int look(Scanner *s) {
 	return SWIG_TOKEN_MODEQUAL;
       } else if (c == '}') {
 	Swig_error(cparse_file, cparse_line, "Syntax error. Extraneous '%%}'\n");
-	exit(1);
+	SWIG_exit(EXIT_FAILURE);
       } else {
 	retract(s, 1);
 	return SWIG_TOKEN_PERCENT;

Source/Swig/swig.h

@@ -438,6 +438,7 @@ extern int        ParmList_is_compactdefargs(ParmList *p);
   extern void Language_replace_special_variables(String *method, String *tm, Parm *parm);
   extern void Swig_print(DOH *object, int count);
   extern void Swig_print_with_location(DOH *object, int count);
+  extern void SWIG_exit(int exit_code);
 
 
 /* -- template init -- */