NuttX RTOS

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 239 insertions, 0 deletions

diff --git a/nuttx/tools/mkconfig.c b/nuttx/tools/mkconfig.c
new file mode 100644
index 000000000..6de8ddd93
--- /dev/null
+++ b/nuttx/tools/mkconfig.c
@@ -0,0 +1,239 @@
+/************************************************************
+ * mkconfig.c
+ *
+ *   Copyright (C) 2007 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 Gregory Nutt 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.
+ *
+ ************************************************************/
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <errno.h>
+
+#define DEFCONFIG "defconfig"
+#define LINESIZE  256
+
+static char line[LINESIZE+1];
+
+static char *skip_space(char *ptr)
+{
+  while (*ptr && isspace(*ptr)) ptr++;
+  return ptr;
+}
+
+static char *find_end(char *ptr)
+{
+  while (*ptr && (isalnum(*ptr) || *ptr == '_')) ptr++;
+  return ptr;
+}
+
+static char *find_comment(char *ptr)
+{
+  while (*ptr && *ptr != '"' && *ptr != '\n') ptr++;
+  if (*ptr == '"') ptr++;
+  return ptr;
+}
+
+static char *read_line(FILE *stream)
+{
+  char *ptr;
+
+  for (;;)
+    {
+      line[LINESIZE] = '\0';
+      if (!fgets(line, LINESIZE, stream))
+        {
+          return NULL;
+        }
+      else
+        {
+          ptr = skip_space(line);
+          if (*ptr && *ptr != '#' && *ptr != '\n')
+            {
+              return ptr;
+            }
+        }
+    }
+}
+
+static void parse_line(char *ptr, char **varname, char **varval)
+{
+  *varname = ptr;
+  *varval = NULL;
+
+   ptr = find_end(ptr);
+   if (*ptr && *ptr != '=')
+    {
+      *ptr = '\0';
+       ptr = skip_space(ptr + 1);
+    }
+
+  if (*ptr == '=')
+    {
+      *ptr = '\0';
+      ptr = skip_space(ptr + 1);
+      if (*ptr)
+        {
+          *varval = ptr;
+          if (*ptr == '"')
+            {
+              ptr = find_comment(ptr);
+            }
+          else
+            {
+              ptr = find_end(ptr);
+            }
+          *ptr = '\0';
+        }
+    }
+}
+
+static void parse_file(FILE *stream)
+{
+  char *varname;
+  char *varval;
+  char *ptr;
+
+  do
+    {
+      ptr = read_line(stream);
+      if (ptr)
+        {
+          parse_line(ptr, &varname, &varval);
+          if (varname)
+            {
+              if (!varval || strcmp(varval, "n") == 0)
+                {
+                  printf("#undef %s\n", varname);
+                }
+              else if (strcmp(varval, "y") == 0)
+                {
+                  printf("#define %s 1\n", varname);
+                }
+              else
+                {
+                  printf("#define %s %s\n", varname, varval);
+                }
+            }
+        }
+    }
+  while (ptr);
+}
+
+static void show_usage(const char *progname)
+{
+  fprintf(stderr, "USAGE: %s <abs path to defconfig>\n", progname);
+  exit(1);
+}
+
+int main(int argc, char **argv, char **envp)
+{
+  char *filepath;
+  FILE *stream;
+  int status;
+
+  if (argc != 2)
+    {
+      fprintf(stderr, "Unexpected number of arguments\n");
+      show_usage(argv[0]);
+    }
+
+  status = asprintf(&filepath, "%s/" DEFCONFIG, argv[1]);
+  if (status < 0)
+    {
+      fprintf(stderr, "asprintf failed\n");
+      exit(2);
+    }
+
+  stream= fopen(filepath, "r");
+  if (!stream)
+    {
+      fprintf(stderr, "open %s failed: %s\n", filepath, strerror(errno));
+      exit(3);
+    }
+
+  printf("/* config.h -- Autogenerated! Do not edit. */\n\n");
+  printf("#ifndef __ARCH_CONFIG_H\n");
+  printf("#define __ARCH_CONFIG_H\n\n");
+  printf("/* Architecture-specific options *************************/\n\n");
+  parse_file(stream);
+  printf("\n/* Sanity Checks *****************************************/\n\n");
+  printf("/* The correct way to disable RR scheduling is to set the\n");
+  printf(" * timeslice to zero.\n");
+  printf(" */\n\n");
+  printf("#ifndef CONFIG_RR_INTERVAL\n");
+  printf("# define CONFIG_RR_INTERVAL 0\n");
+  printf("#endif\n\n");
+  printf("/* The correct way to disable filesystem supuport is to set the\n");
+  printf(" * number of file descriptors to zero.\n");
+  printf(" */\n\n");
+  printf("#ifndef CONFIG_NFILE_DESCRIPTORS\n");
+  printf("# define CONFIG_NFILE_DESCRIPTORS 0\n");
+  printf("#endif\n\n");
+  printf("/* If a console is selected, then make sure that there are\n");
+  printf(" * resources for 3 file descriptors and, if any streams are\n");
+  printf(" * selected, also for 3 file streams.\n");
+  printf(" */\n\n");
+  printf("#ifdef CONFIG_DEV_CONSOLE\n");
+  printf("# if CONFIG_NFILE_DESCRIPTORS < 3\n");
+  printf("#   undef CONFIG_NFILE_DESCRIPTORS\n");
+  printf("#   define CONFIG_NFILE_DESCRIPTORS 3\n");
+  printf("# endif\n\n");
+  printf("# if CONFIG_NFILE_STREAMS > 0 && CONFIG_NFILE_STREAMS < 3\n");
+  printf("#  undef CONFIG_NFILE_STREAMS\n");
+  printf("#  define CONFIG_NFILE_STREAMS 3\n");
+  printf("# endif\n");
+  printf("#endif\n\n");
+  printf("/* If no file descriptors are configured, then make certain no\n");
+  printf(" * streams are configured either.\n");
+  printf(" */\n\n");
+  printf("#if CONFIG_NFILE_DESCRIPTORS == 0\n");
+  printf("# undef CONFIG_NFILE_STREAMS\n");
+  printf("# define CONFIG_NFILE_STREAMS 0\n");
+  printf("#endif\n\n");
+  printf("/* If no file streams are configured, then make certain that\n");
+  printf(" * buffered I/O support is disabled.\n");
+  printf(" */\n\n");
+  printf("#if CONFIG_NFILE_STREAMS == 0\n");
+  printf("# undef CONFIG_STDIO_BUFFER_SIZE\n");
+  printf("# define CONFIG_STDIO_BUFFER_SIZE 0\n");
+  printf("#endif\n\n");
+  printf("/* Verbose debug only makes sense if debug is enabled */\n\n");
+  printf("#ifndef CONFIG_DEBUG\n");
+  printf("# undef CONFIG_DEBUG_VERBOSE\n");
+  printf("#endif\n\n");
+  printf("#endif /* __ARCH_CONFIG_H */\n");
+  fclose(stream);
+  return 0;
+}