sound/oss/hex2hex.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * hex2hex reads stdin in Intel HEX format and produces an
   4  * (unsigned char) array which contains the bytes and writes it
   5  * to stdout using C syntax
   6  */
   7
   8 #include <stdio.h>
   9 #include <string.h>
  10 #include <stdlib.h>
  11
  12 #define ABANDON(why) { fprintf(stderr, "%s\n", why); exit(1); }
  13 #define MAX_SIZE (256*1024)
  14 unsigned char buf[MAX_SIZE];
  15
  16 static int loadhex(FILE *inf, unsigned char *buf)
  17 {
  18         int l=0, c, i;
  19
  20         while ((c=getc(inf))!=EOF)
  21         {
  22                 if (c == ':')   /* Sync with beginning of line */
  23                 {
  24                         int n, check;
  25                         unsigned char sum;
  26                         int addr;
  27                         int linetype;
  28
  29                         if (fscanf(inf, "%02x", &n) != 1)
  30                            ABANDON("File format error");
  31                         sum = n;
  32
  33                         if (fscanf(inf, "%04x", &addr) != 1)
  34                            ABANDON("File format error");
  35                         sum += addr/256;
  36                         sum += addr%256;
  37
  38                         if (fscanf(inf, "%02x", &linetype) != 1)
  39                            ABANDON("File format error");
  40                         sum += linetype;
  41
  42                         if (linetype != 0)
  43                            continue;
  44
  45                         for (i=0;i<n;i++)
  46                         {
  47                                 if (fscanf(inf, "%02x", &c) != 1)
  48                                    ABANDON("File format error");
  49                                 if (addr >= MAX_SIZE)
  50                                    ABANDON("File too large");
  51                                 buf[addr++] = c;
  52                                 if (addr > l)
  53                                    l = addr;
  54                                 sum += c;
  55                         }
  56
  57                         if (fscanf(inf, "%02x", &check) != 1)
  58                            ABANDON("File format error");
  59
  60                         sum = ~sum + 1;
  61                         if (check != sum)
  62                            ABANDON("Line checksum error");
  63                 }
  64         }
  65
  66         return l;
  67 }
  68
  69 int main( int argc, const char * argv [] )
  70 {
  71         const char * varline;
  72         int i,l;
  73         int id=0;
  74
  75         if(argv[1] && strcmp(argv[1], "-i")==0)
  76         {
  77                 argv++;
  78                 argc--;
  79                 id=1;
  80         }
  81         if(argv[1]==NULL)
  82         {
  83                 fprintf(stderr,"hex2hex: [-i] filename\n");
  84                 exit(1);
  85         }
  86         varline = argv[1];
  87         l = loadhex(stdin, buf);
  88
  89         printf("/*\n *\t Computer generated file. Do not edit.\n */\n");
  90         printf("static int %s_len = %d;\n", varline, l);
  91         printf("static unsigned char %s[] %s = {\n", varline, id?"__initdata":"");
  92
  93         for (i=0;i<l;i++)
  94         {
  95                 if (i) printf(",");
  96                 if (i && !(i % 16)) printf("\n");
  97                 printf("0x%02x", buf[i]);
  98         }
  99
 100         printf("\n};\n\n");
 101         return 0;
 102 }