root/sound/oss/hex2hex.c

DEFINITIONS

1. loadhex
2. main

/*
 * hex2hex reads stdin in Intel HEX format and produces an
 * (unsigned char) array which contains the bytes and writes it
 * to stdout using C syntax
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define ABANDON(why) { fprintf(stderr, "%s\n", why); exit(1); }
#define MAX_SIZE (256*1024)
unsigned char buf[MAX_SIZE];

int loadhex(FILE *inf, unsigned char *buf)
{
        int l=0, c, i;

        while ((c=getc(inf))!=EOF)
        {
                if (c == ':')   /* Sync with beginning of line */
                {
                        int n, check;
                        unsigned char sum;
                        int addr;
                        int linetype;

                        if (fscanf(inf, "%02x", &n) != 1)
                           ABANDON("File format error");
                        sum = n;

                        if (fscanf(inf, "%04x", &addr) != 1)
                           ABANDON("File format error");
                        sum += addr/256;
                        sum += addr%256;

                        if (fscanf(inf, "%02x", &linetype) != 1)
                           ABANDON("File format error");
                        sum += linetype;

                        if (linetype != 0)
                           continue;

                        for (i=0;i<n;i++)
                        {
                                if (fscanf(inf, "%02x", &c) != 1)
                                   ABANDON("File format error");
                                if (addr >= MAX_SIZE)
                                   ABANDON("File too large");
                                buf[addr++] = c;
                                if (addr > l)
                                   l = addr;
                                sum += c;
                        }

                        if (fscanf(inf, "%02x", &check) != 1)
                           ABANDON("File format error");

                        sum = ~sum + 1;
                        if (check != sum)
                           ABANDON("Line checksum error");
                }
        }

        return l;
}

int main( int argc, const char * argv [] )
{
        const char * varline;
        int i,l;
        int id=0;

        if(argv[1] && strcmp(argv[1], "-i")==0)
        {
                argv++;
                argc--;
                id=1;
        }
        if(argv[1]==NULL)
        {
                fprintf(stderr,"hex2hex: [-i] filename\n");
                exit(1);
        }
        varline = argv[1];
        l = loadhex(stdin, buf);

        printf("/*\n *\t Computer generated file. Do not edit.\n */\n");
        printf("static int %s_len = %d;\n", varline, l);
        printf("static unsigned char %s[] %s = {\n", varline, id?"__initdata":"");

        for (i=0;i<l;i++)
        {
                if (i) printf(",");
                if (i && !(i % 16)) printf("\n");
                printf("0x%02x", buf[i]);
        }

        printf("\n};\n\n");
        return 0;
}