Use new string trimming functions in parsers.

* include/mailutils/cstr.h (mu_str_stripws): New function.
* mailbox/stripws.c: New file.
* mailbox/Makefile.am (libmailutils_la_SOURCES): Add stripws.c

* examples/nntpclient.c (stripwhite): Remove. Use mu_str_stripws instead.
(execute_line): Rewrite using new string functions.
* examples/pop3client.c: Likewise.
* mailbox/mailcap.c (stripwhite): Remove. Use mu_str_stripws instead.
* mailbox/mime.c (_strltrim, _strttrim, _strtrim): Remove. Use
mu_str_stripws instead.

* mail/mail.c: Use mu_str_stripws.
* mail/mail.h (util_stripwhite): Remove prototype.
* mail/util.c (util_stripwhite): Remove
* examples/pop3client.c: Likewise.
* imap4d/util.c: Use new string functions.
* maidag/forward.c: Likewise.
* maidag/lmtp.c: Likewise.
* mh/mhn.c: Likewise.

* libproto/imap/folder.c: Remove unused local.
* libproto/mailer/smtp.c (smtp_writeline): Minor optimization.

@@ -44,6 +44,7 @@
 #include <mailutils/errno.h>
 #include <mailutils/mutil.h>
 #include <mailutils/cctype.h>
+#include <mailutils/cstr.h>
 
 /* A structure which contains information on the commands this program
    can understand. */
@@ -87,7 +88,6 @@ int com_stat (char *);
 int com_verbose (char *);
 
 void initialize_readline (void);
-char *stripwhite (char *);
 COMMAND *find_command (char *);
 char *dupstr (const char *);
 int execute_line (char *);
@@ -274,7 +274,7 @@ main (int argc MU_ARG_UNUSED, char **argv)
       /* Remove leading and trailing whitespace from the line.
          Then, if there is anything left, add it to the history list
          and execute it. */
-      s = stripwhite (line);
+      s = mu_str_stripws (line);
 
       if (*s)
 	{
@@ -294,45 +294,34 @@ main (int argc MU_ARG_UNUSED, char **argv)
 int
 execute_line (char *line)
 {
-  register int i;
   COMMAND *command;
-  char *word;
+  char *word, *arg;
 
   /* Isolate the command word. */
-  i = 0;
-  while (line[i] && mu_isblank (line[i]))
-    i++;
-  word = line + i;
-
-  while (line[i] && !mu_isblank (line[i]))
-    i++;
-
-  if (line[i])
-    line[i++] = '\0';
+  word = mu_str_skip_class (line, MU_CTYPE_SPACE);
+  arg = mu_str_skip_class_comp (word, MU_CTYPE_SPACE);
+  if (*arg)
+    {
+      *arg++ = 0;
+      arg = mu_str_skip_class (arg, MU_CTYPE_SPACE);
+    }
       
   command = find_command (word);
 
   if (!command)
     {
-      fprintf (stderr, "%s: No such command for %s.\n", word, progname);
-      return (-1);
+      mu_error ("%s: No such command.", word);
+      return 0;
     }
 
-  /* Get argument to command, if any. */
-  while (mu_isblank (line[i]))
-    i++;
-
-  word = line + i;
-
   /* Call the function. */
-  return ((*(command->func)) (word));
+  return ((*(command->func)) (arg));
 }
 
 /* Look up NAME as the name of a command, and return a pointer to that
    command.  Return a NULL pointer if NAME isn't a command name. */
 COMMAND *
-find_command (name)
-     char *name;
+find_command (char *name)
 {
   register int i;
 
@@ -343,27 +332,6 @@ find_command (name)
   return ((COMMAND *) NULL);
 }
 
-/* Strip whitespace from the start and end of STRING.  Return a pointer
-   into STRING. */
-char *
-stripwhite (char *string)
-{
-  register char *s, *t;
-
-  for (s = string; mu_isblank (*s); s++)
-    ;
-
-  if (*s == 0)
-    return (s);
-
-  t = s + strlen (s) - 1;
-  while (t > s && mu_isblank (*t))
-    t--;
-  *++t = '\0';
-
-  return s;
-}
-
 int
 com_verbose (char *arg)
 {

@@ -46,6 +46,7 @@
 #include <mailutils/vartab.h>
 #include <mailutils/argcv.h>
 #include <mailutils/cctype.h>
+#include <mailutils/cstr.h>
 
 /* A structure which contains information on the commands this program
    can understand. */
@@ -80,7 +81,6 @@ int com_verbose (char *);
 int com_prompt (char *);
 
 void initialize_readline (void);
-char *stripwhite (char *);
 COMMAND *find_command (char *);
 char *dupstr (const char *);
 int execute_line (char *);
@@ -322,7 +322,7 @@ main (int argc MU_ARG_UNUSED, char **argv)
       /* Remove leading and trailing whitespace from the line.
          Then, if there is anything left, add it to the history list
          and execute it. */
-      s = stripwhite (line);
+      s = mu_str_stripws (line);
 
       if (*s)
 	{
@@ -342,21 +342,17 @@ main (int argc MU_ARG_UNUSED, char **argv)
 int
 execute_line (char *line)
 {
-  register int i;
   COMMAND *command;
-  char *word;
+  char *word, *arg;
 
   /* Isolate the command word. */
-  i = 0;
-  while (line[i] && mu_isblank (line[i]))
-    i++;
-  word = line + i;
-
-  while (line[i] && !mu_isblank (line[i]))
-    i++;
-
-  if (line[i])
-    line[i++] = '\0';
+  word = mu_str_skip_class (line, MU_CTYPE_SPACE);
+  arg = mu_str_skip_class_comp (word, MU_CTYPE_SPACE);
+  if (*arg)
+    {
+      *arg++ = 0;
+      arg = mu_str_skip_class (arg, MU_CTYPE_SPACE);
+    }
       
   command = find_command (word);
 
@@ -366,21 +362,14 @@ execute_line (char *line)
       return 0;
     }
 
-  /* Get argument to command, if any. */
-  while (mu_isblank (line[i]))
-    i++;
-
-  word = line + i;
-
   /* Call the function. */
-  return ((*(command->func)) (word));
+  return ((*(command->func)) (arg));
 }
 
 /* Look up NAME as the name of a command, and return a pointer to that
    command.  Return a NULL pointer if NAME isn't a command name. */
 COMMAND *
-find_command (name)
-     char *name;
+find_command (char *name)
 {
   register int i;
 
@@ -391,27 +380,6 @@ find_command (name)
   return ((COMMAND *) NULL);
 }
 
-/* Strip whitespace from the start and end of STRING.  Return a pointer
-   into STRING. */
-char *
-stripwhite (char *string)
-{
-  register char *s, *t;
-
-  for (s = string; mu_isblank (*s); s++)
-    ;
-
-  if (*s == 0)
-    return (s);
-
-  t = s + strlen (s) - 1;
-  while (t > s && mu_isblank (*t))
-    t--;
-  *++t = '\0';
-
-  return s;
-}
-
 int
 com_verbose (char *arg)
 {

@@ -1363,13 +1363,11 @@ imap4d_readline (struct imap4d_tokbuf *tok)
           char *p = mu_strcasestr (tok->buffer, "LOGIN");
           if (p && p > tok->buffer && mu_isblank (p[-1]))
             {
-              char *q = p + 5;
-              while (*q && mu_isblank (*q))
-                q++;
-              while (*q && !mu_isblank (*q))
-                q++;
+	      char *q = mu_str_skip_class (p + 5, MU_CTYPE_SPACE);
+	      q = mu_str_skip_class_comp (q, MU_CTYPE_SPACE);
               len = q - tok->buffer; 
-              mu_diag_output (MU_DIAG_DEBUG, "recv: %*.*s {censored}", len, len,
+              mu_diag_output (MU_DIAG_DEBUG,
+			      "recv: %*.*s {censored}", len, len,
                               tok->buffer);
              }
            else

@@ -39,6 +39,7 @@ char *mu_str_skip_cset (const char *str, const char *cset);
 char *mu_str_skip_class_comp (const char *str, int class);
 char *mu_str_skip_cset_comp (const char *str, const char *cset);
 
+char *mu_str_stripws (char *string);  
   
 #ifdef __cplusplus
 }

@@ -1817,7 +1817,6 @@ imap_body (f_imap_t f_imap, char **ptr)
 	{
 	  size_t len = sep - *ptr;
 	  char *section = malloc (len + 1);
-	  char *p;
 	  
 	  if (!section)
 	    return ENOMEM;

@@ -1067,13 +1067,14 @@ smtp_writeline (smtp_t smtp, const char *format, ...)
 
   smtp->ptr = smtp->buffer + len;
 
-  while (len > 0 && mu_isblank (smtp->buffer[len - 1]))
-    len--;
-
   if ((smtp->state != SMTP_SEND && smtp->state != SMTP_SEND_DOT)
       || smtp->mailer->flags & MAILER_FLAG_DEBUG_DATA)
+    {
+      while (len > 0 && mu_isblank (smtp->buffer[len - 1]))
+	len--;
       MU_DEBUG2 (smtp->mailer->debug, MU_DEBUG_PROT, "> %.*s\n", len,
 		 smtp->buffer);
+    }
   
   return 0;
 }

@@ -220,18 +220,10 @@ process_forward (mu_message_t msg, char *filename, const char *myname)
 
   while (getline (&buf, &size, fp) > 0)
     {
-      char *p, *q;
-      for (p = buf; *p && mu_isblank (*p); p++)
-	;
-      q = p + strlen (p);
-      if (q > p)
-	{
-	  if (*--q == '\n')
-	    q--;
-	  for (; q > p && mu_isblank (*q); q--)
-	    ;
-	  q[1] = 0;
-	}
+      char *p;
+
+      mu_rtrim_class (buf, MU_CTYPE_SPACE);
+      p = mu_str_skip_class (buf, MU_CTYPE_SPACE);
 
       if (*p && *p != '#')
 	{

@@ -77,16 +77,6 @@ lmtp_reply (FILE *fp, char *code, char *enh, char *fmt, ...)
 }
 
 void
-trimnl (char *arg)
-{
-  size_t len = strlen (arg);
-  if (len > 0 && arg[len-1] == '\n')
-    arg[--len] = 0;
-  if (len > 0 && arg[len-1] == '\r')
-    arg[--len] = 0;
-}
-
-void
 xlatnl (char *arg)
 {
   size_t len = strlen (arg);
@@ -543,7 +533,7 @@ lmtp_loop (FILE *in, FILE *out, unsigned int timeout)
 	  enum lmtp_command cmd = cp->cmd_code;
 	  enum lmtp_state next_state = transtab[cmd][state];
 
-	  trimnl (buf);
+	  mu_rtrim_cset (sp, "\r\n");
 
 	  if (lmtp_transcript)
 	    mu_diag_output (MU_DIAG_INFO, "LMTP recieve: %s", buf);
@@ -552,8 +542,7 @@ lmtp_loop (FILE *in, FILE *out, unsigned int timeout)
 	    {
 	      if (cp->cmd_fun)
 		{
-		  while (*sp && mu_isblank (*sp))
-		    sp++;
+		  sp = mu_str_skip_class (sp, MU_CTYPE_SPACE);
 		  if (cp->cmd_fun (out, sp))
 		    continue;
 		}

@@ -529,7 +529,7 @@ mail_mainloop (char *(*input) (void *, int),
 	  command = buf;
 	  len = strlen (command);
 	}
-      cmd = util_stripwhite (command);
+      cmd = mu_str_stripws (command);
       util_do_command ("%s", cmd);
 #ifdef WITH_READLINE
       if (do_history && !(mu_isspace(cmd[0]) || cmd[0] == '#'))

@@ -313,7 +313,6 @@ extern size_t util_range_msg (size_t low, size_t high, int flags,
 			      msg_handler_t func, void *data);
 
 extern function_t* util_command_get (const char *cmd);
-extern char *util_stripwhite (char *string);
 
 extern void *util_find_entry (void *table, size_t nmemb, size_t size,
 			      const char *cmd);

@@ -336,24 +336,6 @@ util_command_list (void *table, size_t nmemb, size_t size)
 }
 
 /*
- * removes whitespace from the beginning and end of a string
- */
-char *
-util_stripwhite (char *string)
-{
-  register char *s, *t;
-  for (s = string; mu_isspace ((unsigned)*s); s++)
-    ;
-  if (*s == 0)
-    return s;
-  t = s + strlen (s) - 1;
-  while (t > s && mu_isspace ((unsigned)*t))
-    t--;
-  *++t = '\0';
-  return s;
-}
-
-/*
  * Get the number of columns on the screen
  * First try an ioctl() call not all shells set the COLUMNS environ.
  */

@@ -123,6 +123,7 @@ libmailutils_la_SOURCES = \
  stream.c\
  strltrim.c\
  strskip.c\
+ stripws.c\
  strrtrim.c\
  syslog.c\
  system.c\

@@ -50,7 +50,6 @@ struct _mu_mailcap
 
 static int mu_mailcap_parse (mu_mailcap_t mailcap, mu_stream_t stream);
 static int mu_mailcap_parse_entry (mu_mailcap_entry_t entry, char *buffer);
-static char * stripwhite (char *string);
 static char * tokenize (char *s, char **save_ptr);
 
 int
@@ -371,8 +370,8 @@ mu_mailcap_entry_get_value (mu_mailcap_entry_t entry, const char *key,
 		      if (value != NULL)
 			{
 			  value++; /* Pass the equal.  */
-			  /* Remove prepend space.  */
-			  for (; mu_isspace ((unsigned char)*value); value++)
+			  /* Remove leading space.  */
+			  for (; mu_isspace (*value); value++)
 			    ;
 			  len = strlen (value);
 			  /* Strip surrounding double quotes */
@@ -400,27 +399,6 @@ mu_mailcap_entry_get_value (mu_mailcap_entry_t entry, const char *key,
   return status;
 }
 
-/* Strip whitespace from the start and end of STRING.  Return a pointer
-   into STRING. */
-static char *
-stripwhite (char *string)
-{
-  register char *s, *t;
-
-  for (s = string; mu_isspace ((unsigned char)*s); s++)
-    ;
-
-  if (*s == 0)
-    return (s);
-
-  t = s + strlen (s) - 1;
-  while (t > s && mu_isspace (*t))
-    t--;
-  *++t = '\0';
-
-  return s;
-}
-
 /*
  * break the line on ';'.  Same as strtok() but
  * check for escaped "\;"
@@ -479,12 +457,12 @@ mu_mailcap_parse_entry (mu_mailcap_entry_t entry, char *buffer)
 	{
 	  /* The first entry in a mailcap line is the typefield.  */
 	case 0:
-	  entry->typefield = strdup (stripwhite (token));
+	  entry->typefield = strdup (mu_str_stripws (token));
 	  break;
 
 	  /* The second entry in a mailcap line is the view-command.  */
 	case 1:
-	  entry->viewcommand = strdup (stripwhite(token));
+	  entry->viewcommand = strdup (mu_str_stripws (token));
 	  break;
 
 	  /* The rest are the optional fields.  */
@@ -496,7 +474,8 @@ mu_mailcap_parse_entry (mu_mailcap_entry_t entry, char *buffer)
 	    if (fields != NULL)
 	      {
 		entry->fields = fields;
-		entry->fields[entry->fields_count] = strdup (stripwhite (token));
+		entry->fields[entry->fields_count] =
+		  strdup (mu_str_stripws (token));
 		entry->fields_count++;
 	      }
 	  }
@@ -643,7 +622,7 @@ mu_mailcap_parse (mu_mailcap_t mailcap, mu_stream_t stream)
       /* Parse the well-form mailcap line entry.  */
       if (previous == NULL) {
 	/* Nuke the trailing/prepend spaces.  */
-	char *line = stripwhite(buffer);
+	char *line = mu_str_stripws (buffer);
 	/* Ignore comments or empty lines  */
 	if (*line != '#' && *line != '\0')
 	  {

@@ -133,30 +133,6 @@ _mime_append_part (mu_mime_t mime, mu_message_t msg, int offset, int len, int li
   return 0;
 }
 
-static char *
-_strltrim (char *str)
-{
-  char *p;
-
-  for (p = str; mu_isspace (*p) && *p != '\0'; ++p);
-  return ((p != str) ? memmove (str, p, strlen (p) + 1) : str);
-}
-
-static char *
-_strttrim (char *str)
-{
-  char *p;
-
-  for (p = str + strlen (str) - 1;
-       mu_isspace (*p) && p >= str; --p);
-  *++p = '\0';
-  return (str);
-}
-
-char *_strtrim (char *str);
-
-#define _strtrim(str) _strltrim(_strttrim(str))
-
 #define _ISSPECIAL(c) (						 \
     ((c) == '(') || ((c) == ')') || ((c) == '<') || ((c) == '>') \
     || ((c) == '@') || ((c) == ',') || ((c) == ';') || ((c) == ':') \
@@ -169,7 +145,7 @@ _mime_munge_content_header (char *field_body)
   char           *p, *e, *str = field_body;
   int             quoted = 0;
 
-  _strtrim (field_body);
+  mu_str_stripws (field_body);
 
   if ((e = strchr (str, ';')) == NULL)
     return;

+/* This file is part of GNU Mailutils
+   Copyright (C) 2009 Free Software Foundation, Inc.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 3 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General
+   Public License along with this library.  If not, see
+   <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+#include <stdlib.h>
+#include <mailutils/cctype.h>
+#include <mailutils/cstr.h>
+
+/*
+ * removes whitespace from the beginning and end of a string
+ */
+char *
+mu_str_stripws (char *string)
+{
+  mu_rtrim_class (string, MU_CTYPE_SPACE);
+  return mu_str_skip_class (string, MU_CTYPE_SPACE);
+}

@@ -480,7 +480,7 @@ yylex ()
 	{
 	  curp -= rest;
 	  yylval.builtin = bp;
-	  while (*curp && mu_isspace(*curp))
+	  while (*curp && mu_isspace (*curp))
 	    curp++;
 	  return FUNCTION;
 	}

@@ -617,8 +617,7 @@ mhn_compose_command (char *typestr, int *flags, char *file)
     %s  subtype */
 
   obstack_init (&stk);
-  for (p = str; *p && mu_isspace (*p); p++)
-    ;
+  p = mu_str_skip_class (str, MU_CTYPE_SPACE);
   
   if (*p == '|')
     p++;
@@ -661,12 +660,11 @@ mhn_compose_command (char *typestr, int *flags, char *file)
   free (subtype);
 
   str = obstack_finish (&stk);
-  for (p = str; *p && mu_isspace (*p); p++)
-    ;
+  p = mu_str_skip_class (str, MU_CTYPE_SPACE);
   if (!*p)
     str = NULL;
   else
-    str = strdup (str);
+    str = strdup (p);
 
   obstack_free (&stk, NULL);
   return (char*) str;
@@ -700,8 +698,7 @@ mhn_show_command (mu_message_t msg, msg_part_t part, int *flags,
     %d  content description */
 
   obstack_init (&stk);
-  for (p = str; *p && mu_isspace (*p); p++)
-    ;
+  p = mu_str_skip_class (str, MU_CTYPE_SPACE);
   
   if (*p == '|')
     p++;
@@ -777,12 +774,11 @@ mhn_show_command (mu_message_t msg, msg_part_t part, int *flags,
   free (subtype);
 
   str = obstack_finish (&stk);
-  for (p = str; *p && mu_isspace (*p); p++)
-    ;
+  p = mu_str_skip_class (str, MU_CTYPE_SPACE);
   if (!*p)
     str = NULL;
   else
-    str = strdup (str);
+    str = strdup (p);
 
   obstack_free (&stk, NULL);
   return (char*) str;
@@ -869,12 +865,11 @@ mhn_store_command (mu_message_t msg, msg_part_t part, char *name)
   free (subtype);
   
   str = obstack_finish (&stk);
-  for (p = str; *p && mu_isspace (*p); p++)
-    ;
+  p = mu_str_skip_class (str, MU_CTYPE_SPACE);
   if (!*p)
     str = NULL;
   else
-    str = strdup (str);
+    str = strdup (p);
   
   obstack_free (&stk, NULL);
   return (char*) str;
@@ -985,9 +980,8 @@ get_extbody_params (mu_message_t msg, char **content, char **descr)
 	  && mu_c_strncasecmp (buf, MU_HEADER_CONTENT_DESCRIPTION ":",
 			       sizeof (MU_HEADER_CONTENT_DESCRIPTION)) == 0)
 	{
-	  for (p = buf + sizeof (MU_HEADER_CONTENT_DESCRIPTION);
-	       *p && mu_isspace (*p); p++)
-	    ;
+	  p = mu_str_skip_class (buf + sizeof (MU_HEADER_CONTENT_DESCRIPTION),
+				 MU_CTYPE_SPACE);
 	  *descr = strdup (p);
 	}
       else if (content
@@ -995,9 +989,8 @@ get_extbody_params (mu_message_t msg, char **content, char **descr)
 			            sizeof (MU_HEADER_CONTENT_TYPE)) == 0)
 	{
 	  char *q;
-	  for (p = buf + sizeof (MU_HEADER_CONTENT_TYPE);
-	       *p && mu_isspace (*p); p++)
-	    ;
+	  p = mu_str_skip_class (buf + sizeof (MU_HEADER_CONTENT_TYPE),
+				 MU_CTYPE_SPACE);
 	  q = strchr (p, ';');
 	  if (q)
 	    *q = 0;
@@ -1830,7 +1823,7 @@ parse_brace (char **pval, char **cmd, int c, struct compose_env *env)
 }
 
 #define isdelim(c) (mu_isspace (c) || strchr (";<[(", c))
-#define skipws(ptr) do { while (*ptr && mu_isspace (*ptr)) ptr++; } while (0)
+#define skipws(ptr) (ptr) = mu_str_skip_class (ptr, MU_CTYPE_SPACE)
 
 int
 parse_content_type (struct compose_env *env,
@@ -2301,9 +2294,7 @@ edit_mime (char *cmd, struct compose_env *env, mu_message_t *msg, int level)
   if (rc)
     return 1;
 
-  for (p = cmd + strlen (cmd) - 1; p > cmd && mu_isspace (*p); p--)
-    ;
-  p[1] = 0;
+  mu_rtrim_class (cmd, MU_CTYPE_SPACE);
 
   _get_content_type (hdr, &typestr, NULL);
   shell_cmd = mhn_compose_command (typestr, &flags, cmd);
@@ -2463,9 +2454,8 @@ mhn_edit (struct compose_env *env, int level)
 		finish_text_msg (env, &msg, ascii_buf);
 	      
 	      /* Execute the directive */
-	      tok = sp = buf;
-	      while (*sp && !mu_isspace (*sp))
-		sp++;
+	      tok = buf;
+	      sp = mu_str_skip_class_comp (buf, MU_CTYPE_SPACE);
 	      c = *sp;
 	      *sp = 0;