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/* ".HEX" file output for gpasm
Copyright (C) 1998 James Bowman
This file is part of gpasm.
gpasm is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
gpasm is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with gpasm; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "stdhdr.h"
#include "gpasm.h"
#include "hex.h"
static int sum;
static FILE *hex;
static void new_record()
{
fprintf(hex, ":");
sum = 0;
}
static void write_byte(int b)
{
sum += b;
assert((0 <= b) && (b <= 255));
fprintf(hex, "%02X", b);
}
/* Write big-endian word */
static void write_bg_word(int w)
{
write_byte((w >> 8) & 0xff);
write_byte(w & 0xff);
}
/* Write little-endian word */
static void write_word(int w)
{
write_byte(w & 0xff);
write_byte((w >> 8) & 0xff);
}
static void end_record()
{
write_byte((-sum) & 0xff);
fprintf(hex, "\n");
}
void dump_hex()
{
int i, j;
char *pc;
switch (state.hexfile) {
case normal:
strcpy(state.hexfilename, state.srcfilename);
pc = strrchr(state.hexfilename, '.');
if (pc == NULL)
pc = state.hexfilename + strlen(state.hexfilename);
strcpy(pc, ".hex");
break;
case suppress:
return;
case named:
/* Don't need to do anything - name is already set up */
;
}
if (state.num.errors) {
/* Remove the hex file (if any) */
unlink(state.hexfilename);
return;
}
/* No error: overwrite the hex file */
hex = fopen(state.hexfilename, "w");
i = 0;
while (i < MAX_I_MEM) {
if ((state.i_memory[i] & MEM_USED_MASK) == 0) {
++i;
} else {
j = i;
while ((state.i_memory[i] & MEM_USED_MASK)) {
++i;
if ((i & 7) == 0)
break;
}
/* Now we have a run of (i - j) occupied memory locations. */
new_record();
write_byte(2 * (i - j));
write_bg_word(2 * j);
write_byte(0);
while (j < i)
write_word(state.i_memory[j++]);
end_record();
}
}
new_record();
write_byte(0);
write_word(0);
write_byte(1);
end_record();
fclose(hex);
}
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