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
loadhex(FILE * inf,unsigned char * buf)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
main(int argc,const char * argv[])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 }
103