diff options
Diffstat (limited to 'nuttx/tools/cfgparser.c')
-rw-r--r-- | nuttx/tools/cfgparser.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/nuttx/tools/cfgparser.c b/nuttx/tools/cfgparser.c new file mode 100644 index 000000000..2917a2f60 --- /dev/null +++ b/nuttx/tools/cfgparser.c @@ -0,0 +1,168 @@ +/**************************************************************************** + * tools/cfgpaser.c + * + * Copyright (C) 2007-2011 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <string.h> +#include <ctype.h> +#include "cfgparser.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +char line[LINESIZE+1]; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +static char *skip_space(char *ptr) +{ + while (*ptr && isspace((int)*ptr)) ptr++; + return ptr; +} + +static char *find_name_end(char *ptr) +{ + while (*ptr && (isalnum((int)*ptr) || *ptr == '_')) ptr++; + return ptr; +} + +static char *find_value_end(char *ptr) +{ + while (*ptr && !isspace((int)*ptr)) + { + if (*ptr == '"') + { + do ptr++; while (*ptr && *ptr != '"'); + if (*ptr) ptr++; + } + else + { + do ptr++; while (*ptr && !isspace((int)*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_name_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; + ptr = find_value_end(ptr); + *ptr = '\0'; + } + } +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +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); +} |