forked from Archive/PX4-Autopilot
324 lines
8.2 KiB
C
324 lines
8.2 KiB
C
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/****************************************************************************
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* tools/cmpconfig.c
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <errno.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct variable_s
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{
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struct variable_s *flink;
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char *var;
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char *val;
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char storage[1];
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static void show_usage(const char *progname)
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{
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fprintf(stderr, "USAGE: %s <config1> <config2>\n", progname);
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exit(EXIT_FAILURE);
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}
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static char *skip_space(char *ptr)
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{
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while (*ptr && isspace((int)*ptr)) ptr++;
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return ptr;
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}
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static char *read_line(FILE *stream, char *line, int len)
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{
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char *ptr;
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for (;;)
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{
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line[len-1] = '\0';
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if (!fgets(line, len, stream))
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{
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return NULL;
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}
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else
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{
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ptr = skip_space(line);
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if (*ptr && *ptr != '#' && *ptr != '\n')
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{
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return ptr;
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}
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}
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}
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}
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static char *find_name_end(char *ptr)
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{
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while (*ptr && (isalnum((int)*ptr) || *ptr == '_')) ptr++;
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return ptr;
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}
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static char *find_value_end(char *ptr)
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{
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while (*ptr && !isspace((int)*ptr))
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{
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if (*ptr == '"')
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{
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do ptr++; while (*ptr && *ptr != '"');
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if (*ptr) ptr++;
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}
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else
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{
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do ptr++; while (*ptr && !isspace((int)*ptr) && *ptr != '"');
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}
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}
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return ptr;
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}
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static void parse_line(char *ptr, char **varname, char **varval)
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{
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*varname = ptr;
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*varval = NULL;
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ptr = find_name_end(ptr);
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if (*ptr && *ptr != '=')
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{
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*ptr = '\0';
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ptr = skip_space(ptr + 1);
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}
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if (*ptr == '=')
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{
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*ptr = '\0';
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ptr = skip_space(ptr + 1);
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if (*ptr)
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{
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*varval = ptr;
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ptr = find_value_end(ptr);
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*ptr = '\0';
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}
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}
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}
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static void parse_file(FILE *stream, struct variable_s **list)
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{
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char line[10242];
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struct variable_s *curr;
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struct variable_s *prev;
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struct variable_s *next;
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char *varname;
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char *varval;
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char *ptr;
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do
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{
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ptr = read_line(stream, line, 1024);
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if (ptr)
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{
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parse_line(ptr, &varname, &varval);
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if (varname)
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{
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int varlen = strlen(varname) + 1;
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int vallen = 0;
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if (varval)
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{
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vallen = strlen(varval) + 1;
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}
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curr = (struct variable_s *)malloc(sizeof(struct variable_s) + varlen + vallen - 1);
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if (curr)
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{
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curr->var = &curr->storage[0];
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strcpy(curr->var, varname);
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curr->val = NULL;
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if (varval)
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{
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curr->val = &curr->storage[varlen];
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strcpy(curr->val, varval);
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}
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}
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prev = 0;
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next = *list;
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while (next && strcmp(next->var, curr->var) <= 0)
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{
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prev = next;
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next = next->flink;
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}
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if (prev)
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{
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prev->flink = curr;
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}
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else
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{
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*list = curr;
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}
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curr->flink = next;
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}
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}
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}
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while (ptr);
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}
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static void compare_variables(struct variable_s *list1, struct variable_s *list2)
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{
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char *varval1;
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char *varval2;
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while (list1 || list2)
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{
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if (list1->val)
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{
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varval1 = list1->val;
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}
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else
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{
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varval1 = "<NULL>";
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}
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if (list2->val)
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{
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varval2 = list2->val;
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}
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else
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{
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varval2 = "<NULL>";
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}
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if (!list1)
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{
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printf("file1:\n");
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printf("file2: %s=%s\n\n", list2->var, varval2);
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list2 = list2->flink;
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}
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else if (!list2)
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{
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printf("file1: %s=%s\n", list1->var, varval1);
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printf("file2:\n\n");
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list1 = list1->flink;
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}
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else
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{
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int result = strcmp(list1->var, list2->var);
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if (result < 0)
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{
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printf("file1: %s=%s\n", list1->var, varval1);
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printf("file2:\n\n");
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list1 = list1->flink;
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}
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else if (result > 0)
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{
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printf("file1:\n");
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printf("file2: %s=%s\n\n", list2->var, varval2);
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list2 = list2->flink;
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}
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else
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{
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int result = strcmp(varval1, varval2);
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if (result != 0)
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{
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printf("file1: %s=%s\n", list1->var, varval1);
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printf("file2: %s=%s\n\n", list2->var, varval2);
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}
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list1 = list1->flink;
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list2 = list2->flink;
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}
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}
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}
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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int main(int argc, char **argv, char **envp)
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{
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struct variable_s *list1 = 0;
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struct variable_s *list2 = 0;
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FILE *stream1;
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FILE *stream2;
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if (argc != 3)
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{
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fprintf(stderr, "Unexpected number of arguments: %d\n\n", argc);
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show_usage(argv[0]);
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}
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stream1 = fopen(argv[1], "r");
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if (!stream1)
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{
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fprintf(stderr, "Failed to open %s for reading: %s\n\n",
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argv[1], strerror(errno));
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show_usage(argv[0]);
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}
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stream2 = fopen(argv[2], "r");
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if (!stream2)
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{
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fprintf(stderr, "Failed to open %s for reading: %s\n\n",
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argv[2], strerror(errno));
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show_usage(argv[0]);
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}
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parse_file(stream1, &list1);
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parse_file(stream2, &list2);
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fclose(stream1);
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fclose(stream2);
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printf("Comparing:\n\n");
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printf(" file1 = %s\n", argv[1]);
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printf(" file2 = %s\n\n", argv[2]);
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compare_variables(list1, list2);
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return EXIT_SUCCESS;
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}
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