reactos/ntoskrnl/mkconfig.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/mkconfig.c
   6  * PURPOSE:         No purpose listed.
   7  *
   8  * PROGRAMMERS:     No programmer listed.
   9  */
  10
  11 #include <string.h>
  12 #include <stdlib.h>
  13 #include <stdio.h>
  14
  15 #define max(a, b) ((a) > (b) ? (a) : (b))
  16
  17 int
  18 write_if_change(char* outbuf, char* filename)
  19 {
  20   FILE* out;
  21   unsigned int end;
  22   char* cmpbuf;
  23   unsigned int stat;
  24
  25   out = fopen(filename, "rb");
  26   if (out == NULL)
  27     {
  28       out = fopen(filename, "wb");
  29       if (out == NULL)
  30         {
  31           fprintf(stderr, "Unable to create output file\n");
  32           return(1);
  33         }
  34       fputs(outbuf, out);
  35       fclose(out);
  36       return(0);
  37     }
  38
  39   fseek(out, 0, SEEK_END);
  40   end = ftell(out);
  41   cmpbuf = malloc(end);
  42   if (cmpbuf == NULL)
  43     {
  44       fprintf(stderr, "Out of memory\n");
  45       fclose(out);
  46       return(1);
  47     }
  48
  49   fseek(out, 0, SEEK_SET);
  50   stat = fread(cmpbuf, 1, end, out);
  51   if (stat != end)
  52     {
  53       fprintf(stderr, "Failed to read data\n");
  54       fclose(out);
  55       return(1);
  56     }
  57   if (end == strlen(outbuf) && memcmp(cmpbuf, outbuf, end) == 0)
  58     {
  59       fclose(out);
  60       return(0);
  61     }
  62
  63   fclose(out);
  64   out = fopen(filename, "wb");
  65   if (out == NULL)
  66     {
  67       fprintf(stderr, "Unable to create output file\n");
  68       return(1);
  69     }
  70
  71   stat = fwrite(outbuf, 1, strlen(outbuf), out);
  72   if (strlen(outbuf) != stat)
  73     {
  74       fprintf(stderr, "Unable to write output file\n");
  75       fclose(out);
  76       return(1);
  77     }
  78   fclose(out);
  79   return(0);
  80 }
  81
  82 int
  83 main(int argc, char* argv[])
  84 {
  85   unsigned int i;
  86   char* outbuf;
  87   char* s;
  88   char config[512];
  89
  90   if (argc == 1)
  91     {
  92       fprintf(stderr, "Not enough arguments\n");
  93       return(1);
  94     }
  95
  96   outbuf = malloc(256 * 1024);
  97   if (outbuf == NULL)
  98     {
  99       fprintf(stderr, "Out of memory 1\n");
 100       return(1);
 101     }
 102
 103   s = outbuf;
 104   s = s + sprintf(s, "/* Automatically generated, ");
 105   s = s + sprintf(s, "Edit the Makefile to change configuration */\n");
 106   s = s + sprintf(s, "#ifndef __NTOSKRNL_INCLUDE_INTERNAL_CONFIG_H\n");
 107   s = s + sprintf(s, "#define __NTOSKRNL_INCLUDE_INTERNAL_CONFIG_H\n");
 108   strcpy(config, "");
 109   for (i = 2; i < argc; i++)
 110     {
 111       s = s + sprintf(s, "#define %s\n", argv[i]);
 112       strcat(config, argv[i]);
 113       if (i != (argc - 1))
 114         {
 115           strcat(config, " ");
 116         }
 117     }
 118   s = s + sprintf(s, "#define CONFIG \"%s\"\n", config);
 119   s = s + sprintf(s, "#endif /* __NTOSKRNL_INCLUDE_INTERNAL_CONFIG_H */\n");
 120
 121   return(write_if_change(outbuf, argv[1]));
 122 }