Added some pattern matching logic

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1972 42af7a65-404d-4744-a932-0658087f49c3

include/nuttx/lib.h

@@ -1,7 +1,8 @@
 /****************************************************************************
  * include/nuttx/lib.h
+ * Non-standard, internal APIs available in lib/.
  *
- *   Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
  *
  * Redistribution and use in source and binary forms, with or without

include/nuttx/regex.h

@@ -0,0 +1,86 @@
+/****************************************************************************
+ * include/nuttx/regex.h
+ * Non-standard, pattern-matching APIs available in lib/.
+ *
+ *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __INCLUDE_NUTTX_REGEX_H
+#define __INCLUDE_NUTTX_REGEX_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/fs.h>
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Name: match
+ *
+ * Description:
+ *   Simple shell-style filename pattern matcher written by Jef Poskanzer
+ *   (See copyright notice in lib/lib_match.c).  This pattern matcher only
+ *   handles '?', '*' and '**', and  multiple patterns separated by '|'.
+ *
+ * Returned Value:
+ *   Returns 1 (match) or 0 (no-match).
+ *
+ ****************************************************************************/
+
+EXTERN int match(const char *pattern, const char *string);
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __INCLUDE_NUTTX_REGEX_H */

lib/Makefile

@@ -87,6 +87,8 @@ NET_SRCS	= lib_htons.c lib_htonl.c lib_inetntoa.c lib_etherntoa.c
 
 LIBGEN_SRCS	= lib_basename.c lib_dirname.c
 
+REGEX_SRCS	= lib_match.c
+
 SQ_SRCS		= sq_addlast.c sq_addfirst.c sq_addafter.c \
 		  sq_rem.c sq_remlast.c sq_remfirst.c sq_remafter.c
 
@@ -96,8 +98,8 @@ DQ_SRCS		= dq_addlast.c dq_addfirst.c dq_addafter.c dq_addbefore.c \
 DBG_SRCS	= lib_dbg.c lib_dumpbuffer.c
 
 CSRCS		= $(MISC_SRCS) $(STRING_SRCS) $(CTYPE_SRCS) $(STDIO_SRCS) $(STDLIB_SRCS) \
-		  $(MATH_SRCS) $(UNISTD_SRCS) $(NET_SRCS) $(LIBGEN_SRCS) $(SQ_SRCS) \
+		  $(MATH_SRCS) $(UNISTD_SRCS) $(NET_SRCS) $(LIBGEN_SRCS) $(REGEX_SRCS) \
-		  $(DQ_SRCS) $(DBG_SRCS) 
+		  $(SQ_SRCS) $(DQ_SRCS) $(DBG_SRCS) 
 COBJS		= $(CSRCS:.c=$(OBJEXT))
 
 SRCS		= $(ASRCS) $(CSRCS)

lib/lib_dbg.c

@@ -33,10 +33,6 @@
  *
  ****************************************************************************/
 
-/****************************************************************************
- * Compilation Switches
- ****************************************************************************/
-
 /****************************************************************************
  * Included Files
  ****************************************************************************/

lib/lib_match.c

@@ -0,0 +1,148 @@
+/****************************************************************************
+ * match.c - simple shell-style filename matcher
+ *
+ * Simple shell-style filename pattern matcher written by Jef Poskanzer
+ * This pattern matcher only handles '?', '*' and '**', and  multiple
+ * patterns separated by '|'.
+ *
+ *   Copyright © 1995,2000 by Jef Poskanzer <jef@mail.acme.com>.
+ *   All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <string.h>
+#include <nuttx/regex.h>
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: match_one
+ *
+ * Description:
+ *   Does all of the work for one '|' delimited pattern
+ *
+ * Returned Value:
+ *   Returns 1 (match) or 0 (no-match).
+ *
+ ****************************************************************************/
+
+static int match_one(const char *pattern, int patlen, const char *string)
+{
+  const char *p;
+  int pl;
+  int i;
+
+  for (p = pattern; p - pattern < patlen; p++, string++)
+    {
+      if (*p == '?' && *string != '\0')
+        {
+          continue;
+        }
+
+      if (*p == '*')
+        {
+          p++;
+          if (*p == '*')
+            {
+              /* Double-wildcard matches anything. */
+
+              p++;
+              i = strlen(string);
+            }
+          else
+            {
+              /* Single-wildcard matches anything but slash. */
+
+              i = strcspn(string, "/");
+            }
+
+          pl = patlen - (p - pattern);
+          for (; i >= 0; i--)
+            {
+              if (match_one(p, pl, &(string[i])))
+                {
+                  return 1;
+                }
+            }
+          return 0;
+        }
+
+      if (*p != *string)
+        {
+          return 0;
+        }
+    }
+
+  if (*string == '\0')
+    {
+      return 1;
+    }
+  return 0;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: match
+ *
+ * Description:
+ *   Simple shell-style filename pattern matcher written by Jef Poskanzer
+ *   This pattern matcher only handles '?', '*' and '**', and  multiple
+ *   patterns separated by '|'.
+ *
+ * Returned Value:
+ *   Returns 1 (match) or 0 (no-match).
+ *
+ ****************************************************************************/
+
+int match(const char *pattern, const char *string)
+{
+  const char *or;
+
+  for (;;)
+    {
+      or = strchr(pattern, '|');
+      if (or == (char *)0)
+        {
+          return match_one(pattern, strlen(pattern), string);
+        }
+
+      if (match_one(pattern, or - pattern, string))
+        {
+          return 1;
+        }
+
+      pattern = or + 1;
+    }
+}
+