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/*
* Usage: mkimg -input <filename
* -image filename
* -header filename
* hexaddr1
* hexaddr2
*
* Loads the input file into a 64K area of memory. The
* input file is in standard Atari Binary load format.
* The memory is initially filled with zeros. After the
* memory has been loaded the program creates either an
* image file or a standard C header file that contains
* the memory starting with hexaddr1 at going up to,
* but not including, hexaddr2.
*/
#include <stdio.h>
#include <ctype.h>
#include <fcntl.h>
#define FALSE 0
#define TRUE 1
typedef enum {
Expect_Header1,
Expect_Header2,
Expect_StartLo,
Expect_StartHi,
Expect_FinishLo,
Expect_FinishHi,
Expect_Data
} State;
main(int argc, char *argv[], char *envp[])
{
unsigned char image[65536];
char *in_filename = NULL;
char *image_filename = NULL;
char *header_filename = NULL;
int error = FALSE;
int start_addr = 0;
int finish_addr = 0;
int addr1 = -1;
int addr2 = -1;
int addr;
int fd;
int i;
State state = Expect_Header1;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-input") == 0)
in_filename = argv[++i];
else if (strcmp(argv[i], "-image") == 0)
image_filename = argv[++i];
else if (strcmp(argv[i], "-header") == 0)
header_filename = argv[++i];
else if (addr1 == -1)
sscanf(argv[i], "%x", &addr1);
else if (addr2 == -1)
sscanf(argv[i], "%x", &addr2);
else
error = TRUE;
}
if (!in_filename || (!image_filename && !header_filename) ||
error || (addr1 == -1) || (addr2 == -1)) {
printf("Usage: %s -input in_fname {-image image_fname|-header header_fname} hexaddr1 hexaddr2\n",
argv[0]);
exit(0);
}
memset(image, 0, 65536);
fd = open(in_filename, O_RDONLY, 0777);
if (fd == -1) {
perror(in_filename);
exit(1);
}
while (1) {
unsigned char byte;
if (read(fd, &byte, 1) != 1)
break;
switch (state) {
case Expect_Header1:
if (byte == 0xff)
state = Expect_Header2;
else
printf("Error: Expecting Header1\n");
break;
case Expect_Header2:
if (byte == 0xff)
state = Expect_StartLo;
else
printf("Error: Expecting Header2\n");
break;
case Expect_StartLo:
start_addr = (start_addr & 0xff00) | byte;
state = Expect_StartHi;
break;
case Expect_StartHi:
start_addr = (start_addr & 0x00ff) | (byte << 8);
state = Expect_FinishLo;
printf("StartAddr = %x\n", start_addr);
if (start_addr == 0xffff) {
printf("Oops thats a header\n");
state = Expect_StartLo;
}
break;
case Expect_FinishLo:
finish_addr = (finish_addr & 0xff00) | byte;
state = Expect_FinishHi;
break;
case Expect_FinishHi:
finish_addr = (finish_addr & 0x00ff) | (byte << 8);
state = Expect_Data;
addr = start_addr;
printf("FinishAddr = %x\n", finish_addr);
break;
case Expect_Data:
image[addr++] = byte;
if (addr > finish_addr)
state = Expect_StartLo;
break;
default:
printf("Error: Invalid State\n");
exit(1);
}
}
close(fd);
/*
* Write image to file
*/
if (image_filename) {
fd = open(image_filename, O_CREAT | O_TRUNC | O_WRONLY, 0777);
if (fd == -1) {
perror(image_filename);
exit(1);
}
write(fd, &image[addr1], addr2 - addr1 + 1);
close(fd);
}
if (header_filename) {
FILE *fp;
char *ptr;
int j;
fp = fopen(header_filename, "w");
if (!fp) {
perror(header_filename);
exit(1);
}
for (ptr = header_filename; *ptr; ptr++) {
if (!isalnum(*ptr))
*ptr = '_';
}
fprintf(fp, "#ifndef __%s__\n", header_filename);
fprintf(fp, "#define __%s__\n\n", header_filename);
fprintf(fp, "static char %s[] =\n{\n\t", header_filename);
for (i = addr1, j = 0; i < addr2; i++) {
fprintf(fp, "0x%02x,", image[i]);
if (++j == 8) {
fprintf(fp, "\n\t");
j = 0;
}
}
fprintf(fp, "0x%02x\n", image[addr2]);
fprintf(fp, "};\n");
fprintf(fp, "\n#endif\n");
fclose(fp);
}
}
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