src/gen_context.c

   1 /**********************************************************************
   2  * Copyright (c) 2013, 2014, 2015 Thomas Daede, Cory Fields           *
   3  * Distributed under the MIT software license, see the accompanying   *
   4  * file COPYING or http://www.opensource.org/licenses/mit-license.php.*
   5  **********************************************************************/
   6
   7 #define USE_BASIC_CONFIG 1
   8
   9 #include "basic-config.h"
  10 #include "include/secp256k1.h"
  11 #include "field_impl.h"
  12 #include "scalar_impl.h"
  13 #include "group_impl.h"
  14 #include "ecmult_gen_impl.h"
  15
  16 static void default_error_callback_fn(const char* str, void* data) {
  17     (void)data;
  18     fprintf(stderr, "[libsecp256k1] internal consistency check failed: %s\n", str);
  19     abort();
  20 }
  21
  22 static const secp256k1_callback default_error_callback = {
  23     default_error_callback_fn,
  24     NULL
  25 };
  26
  27 int main(int argc, char **argv) {
  28     secp256k1_ecmult_gen_context ctx;
  29     int inner;
  30     int outer;
  31     FILE* fp;
  32
  33     (void)argc;
  34     (void)argv;
  35
  36     fp = fopen("src/ecmult_static_context.h","w");
  37     if (fp == NULL) {
  38         fprintf(stderr, "Could not open src/ecmult_static_context.h for writing!\n");
  39         return -1;
  40     }
  41
  42     fprintf(fp, "#ifndef _SECP256K1_ECMULT_STATIC_CONTEXT_\n");
  43     fprintf(fp, "#define _SECP256K1_ECMULT_STATIC_CONTEXT_\n");
  44     fprintf(fp, "#include \"group.h\"\n");
  45     fprintf(fp, "#define SC SECP256K1_GE_STORAGE_CONST\n");
  46     fprintf(fp, "static const secp256k1_ge_storage secp256k1_ecmult_static_context[64][16] = {\n");
  47
  48     secp256k1_ecmult_gen_context_init(&ctx);
  49     secp256k1_ecmult_gen_context_build(&ctx, &default_error_callback);
  50     for(outer = 0; outer != 64; outer++) {
  51         fprintf(fp,"{\n");
  52         for(inner = 0; inner != 16; inner++) {
  53             fprintf(fp,"    SC(%uu, %uu, %uu, %uu, %uu, %uu, %uu, %uu, %uu, %uu, %uu, %uu, %uu, %uu, %uu, %uu)", SECP256K1_GE_STORAGE_CONST_GET((*ctx.prec)[outer][inner]));
  54             if (inner != 15) {
  55                 fprintf(fp,",\n");
  56             } else {
  57                 fprintf(fp,"\n");
  58             }
  59         }
  60         if (outer != 63) {
  61             fprintf(fp,"},\n");
  62         } else {
  63             fprintf(fp,"}\n");
  64         }
  65     }
  66     fprintf(fp,"};\n");
  67     secp256k1_ecmult_gen_context_clear(&ctx);
  68
  69     fprintf(fp, "#undef SC\n");
  70     fprintf(fp, "#endif\n");
  71     fclose(fp);
  72
  73     return 0;
  74 }