New 'trim' module, from Davide Angelocola <davide.angelocola@tiscali.it>.

1 files changed, 132 insertions, 0 deletions

diff --git a/lib/trim.c b/lib/trim.c
new file mode 100644
index 0000000000..78f84b2d94
--- /dev/null
+++ b/lib/trim.c
@@ -0,0 +1,132 @@
+/* Removes leading and/or trailing whitespaces
+   Copyright (C) 2006 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; see the file COPYING.
+   If not, write to the Free Software Foundation,
+   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* Written by Davide Angelocola <davide.angelocola@gmail.com> */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#if HAVE_MBRTOWC 
+# include <stddef.h>
+# include "mbchar.h"
+# include "mbiter.h"
+# include "mbuiter.h"		/* FIXME: for MB_CUR_MAX */
+#else
+# include <ctype.h>
+#endif
+
+#include "xalloc.h"
+#include "trim.h"
+
+char *
+trim2(const char *s, int how)
+{
+  char *d;
+    
+  d = strdup(s);
+
+  if (!d)
+    xalloc_die();
+  
+#if HAVE_MBRTOWC
+  if (MB_CUR_MAX > 1)
+    {
+      mbi_iterator_t i;
+      
+      /* Trim leading whitespaces. */
+      if (how != TRIM_TRAILING) 
+	{
+	  mbi_init (i, d, strlen (d));
+      
+	  for (; mbi_avail (i) && mb_isspace (mbi_cur (i)); mbi_advance (i))
+	    ;
+	  
+	  memmove (d, mbi_cur_ptr (i), strlen (mbi_cur_ptr (i)) + 1);
+	}
+  
+      /* Trim trailing whitespaces. */
+      if (how != TRIM_LEADING) 
+	{
+	  int state = 0;
+	  char *r;
+	  
+	  mbi_init (i, d, strlen (d));
+
+	  for (; mbi_avail (i); mbi_advance (i)) 
+	    {
+	      if (state == 0 && mb_isspace (mbi_cur (i))) 
+		{
+		  state = 0;
+		  continue;
+		}
+	      
+	      if (state == 0 && !mb_isspace (mbi_cur (i)))
+		{
+		  state = 1;
+		  continue;
+		}
+	      
+	      if (state == 1 && !mb_isspace (mbi_cur (i)))
+		{
+		  state = 1;
+		  continue;
+		}
+	      
+	      if (state == 1 && mb_isspace (mbi_cur (i))) 
+		{
+		  state = 2;
+		  r = (char *) mbi_cur_ptr (i);
+		}
+	      else if (state == 2 && mb_isspace (mbi_cur (i))) 
+		{
+		  state = 2;
+		} 
+	      else 
+		{
+		  state = 1;
+		}
+	    }
+	  
+	  if (state == 2) 
+	    *r = '\0';
+	}
+    }
+  else
+#endif /* HAVE_MBRTOWC */
+    {
+      char *p;
+      
+      /* Trim leading whitespaces. */
+      if (how != TRIM_TRAILING) {
+	for (p = d; *p && isspace (*p); p++)
+	  ;			
+
+	memmove (d, p, strlen (p) + 1);
+      }
+
+      /* Trim trailing whitespaces. */
+      if (how != TRIM_LEADING) {
+	for (p = d + strlen (d) - 1; p >= d && isspace (*p); p--)
+	  *p = '\0';
+      }
+    }
+  
+  return d;
+}
+