reactos/ntoskrnl/mkconfig.c

   1 #include <string.h>
   2 #include <stdlib.h>
   3 #include <stdio.h>
   4
   5 #define max(a, b) ((a) > (b) ? (a) : (b))
   6
   7 int
   8 write_if_change(char* outbuf, char* filename)
   9 {
  10   FILE* out;
  11   unsigned int end;
  12   char* cmpbuf;
  13   unsigned int stat;
  14
  15   out = fopen(filename, "rb");
  16   if (out == NULL)
  17     {
  18       out = fopen(filename, "wb");
  19       if (out == NULL)
  20         {
  21           fprintf(stderr, "Unable to create output file\n");
  22           return(1);
  23         }
  24       fputs(outbuf, out);
  25       fclose(out);
  26       return(0);
  27     }
  28
  29   fseek(out, 0, SEEK_END);
  30   end = ftell(out);
  31   cmpbuf = malloc(end);
  32   if (cmpbuf == NULL)
  33     {
  34       fprintf(stderr, "Out of memory\n");
  35       fclose(out);
  36       return(1);
  37     }
  38
  39   fseek(out, 0, SEEK_SET);
  40   stat = fread(cmpbuf, 1, end, out);
  41   if (stat != end)
  42     {
  43       fprintf(stderr, "Failed to read data\n");
  44       fclose(out);
  45       return(1);
  46     }
  47   if (end == strlen(outbuf) && memcmp(cmpbuf, outbuf, end) == 0)
  48     {
  49       fclose(out);
  50       return(0);
  51     }
  52
  53   fclose(out);
  54   out = fopen(filename, "wb");
  55   if (out == NULL)
  56     {
  57       fprintf(stderr, "Unable to create output file\n");
  58       return(1);
  59     }
  60
  61   stat = fwrite(outbuf, 1, strlen(outbuf), out);
  62   if (strlen(outbuf) != stat)
  63     {
  64       fprintf(stderr, "Unable to write output file\n");
  65       fclose(out);
  66       return(1);
  67     }
  68   fclose(out);
  69   return(0);
  70 }
  71
  72 int
  73 main(int argc, char* argv[])
  74 {
  75   unsigned int i;
  76   char* outbuf;
  77   char* s;
  78   char config[512];
  79
  80   if (argc == 1)
  81     {
  82       fprintf(stderr, "Not enough arguments\n");
  83       return(1);
  84     }
  85
  86   outbuf = malloc(256 * 1024);
  87   if (outbuf == NULL)
  88     {
  89       fprintf(stderr, "Out of memory 1\n");
  90       return(1);
  91     }
  92
  93   s = outbuf;
  94   s = s + sprintf(s, "/* Automatically generated, ");
  95   s = s + sprintf(s, "Edit the Makefile to change configuration */\n");
  96   s = s + sprintf(s, "#ifndef __NTOSKRNL_INCLUDE_INTERNAL_CONFIG_H\n");
  97   s = s + sprintf(s, "#define __NTOSKRNL_INCLUDE_INTERNAL_CONFIG_H\n");
  98   strcpy(config, "");
  99   for (i = 2; i < argc; i++)
 100     {
 101       s = s + sprintf(s, "#define %s\n", argv[i]);
 102       strcat(config, argv[i]);
 103       if (i != (argc - 1))
 104         {
 105           strcat(config, " ");
 106         }
 107     }
 108   s = s + sprintf(s, "#define CONFIG \"%s\"\n", config);
 109   s = s + sprintf(s, "#endif /* __NTOSKRNL_INCLUDE_INTERNAL_CONFIG_H */\n");
 110
 111   return(write_if_change(outbuf, argv[1]));
 112 }