dahdi-tools/xpp/hexfile.c

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/*
* Written by Oron Peled <oron@actcom.co.il>
* Copyright (C) 2006, 2007, 2008, Xorcom
*
* All rights reserved.
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <ctype.h>
#include "hexfile.h"
static parse_hexfile_report_func_t report_func = NULL;
parse_hexfile_report_func_t parse_hexfile_set_reporting(parse_hexfile_report_func_t rf)
{
parse_hexfile_report_func_t old_rf = report_func;
report_func = rf;
return old_rf;
}
static void chomp(char buf[])
{
size_t last = strlen(buf) - 1;
while(last >= 0 && isspace(buf[last]))
buf[last--] = '\0';
}
static int hexline_checksum(struct hexline *hexline)
{
unsigned int i;
unsigned int chksm = 0;
int ll = hexline->d.content.header.ll;
for(i = 0; i <= sizeof(hexline->d.content.header) + ll; i++) {
chksm += hexline->d.raw[i];
}
return chksm & 0xFF;
}
int dump_hexline(int recordno, struct hexline *line, FILE *fp)
{
uint8_t ll;
uint16_t offset;
uint8_t tt;
uint8_t old_chksum;
uint8_t new_chksum;
uint8_t *data;
unsigned int i;
ll = line->d.content.header.ll;
offset = line->d.content.header.offset;
tt = line->d.content.header.tt;
fprintf(fp, ":%02X%04X%02X", ll, offset, tt);
data = line->d.content.tt_data.data;
for(i = 0; i < ll; i++) {
fprintf(fp, "%02X", data[i]);
}
old_chksum = data[ll];
data[ll] = 0;
new_chksum = 0xFF - hexline_checksum(line) + 1;
data[ll] = old_chksum;
fprintf(fp, "%02X\n", new_chksum);
if(new_chksum != old_chksum) {
if(report_func)
report_func(LOG_ERR, "record #%d: new_chksum(%02X) != old_chksum(%02X)\n",
recordno, new_chksum, old_chksum);
return 0;
}
return 1;
}
struct hexline *new_hexline(uint8_t datalen, uint16_t offset, uint8_t tt)
{
struct hexline *hexline;
size_t allocsize;
allocsize = sizeof(struct hexline) + datalen + 1; /* checksum byte */
if((hexline = malloc(allocsize)) == NULL) {
if(report_func)
report_func(LOG_ERR, "No more memory\n");
return NULL;
}
memset(hexline, 0, allocsize);
hexline->d.content.header.ll = datalen;
hexline->d.content.header.offset = offset;
hexline->d.content.header.tt = tt;
return hexline;
}
static int append_hexline(struct hexdata *hexdata, char *buf)
{
int ret;
unsigned int ll, offset, tt;
char *p;
struct hexline *hexline;
unsigned int i;
if(hexdata->got_eof) {
if(report_func)
report_func(LOG_ERR, "Extranous data after EOF record\n");
return -EINVAL;
}
if(hexdata->last_line >= hexdata->maxlines) {
if(report_func)
report_func(LOG_ERR, "Hexfile too large (maxline %d)\n", hexdata->maxlines);
return -ENOMEM;
}
ret = sscanf(buf, "%02X%04X%02X", &ll, &offset, &tt);
if(ret != 3) {
if(report_func)
report_func(LOG_ERR, "Bad line header (only %d items out of 3 parsed)\n", ret);
return -EINVAL;
}
switch(tt) {
case TT_DATA:
break;
case TT_EOF:
if(ll != 0) {
if(report_func)
report_func(LOG_ERR,
"%d: Record %d(EOF): Bad len = %d\n",
hexdata->last_line, tt, ll);
return -EINVAL;
}
if(offset != 0) {
if(report_func)
report_func(LOG_ERR,
"%d: Record %d(EOF): Bad offset = %d\n",
hexdata->last_line, tt, offset);
return -EINVAL;
}
hexdata->got_eof = 1;
break;
case TT_EXT_SEG:
if(ll != 2) {
if(report_func)
report_func(LOG_ERR,
"%d: Record %d(EXT_SEG): Bad len = %d\n",
hexdata->last_line, tt, ll);
return -EINVAL;
}
if(offset != 0) {
if(report_func)
report_func(LOG_ERR,
"%d: Record %d(EXT_SEG): Bad offset = %d\n",
hexdata->last_line, tt, offset);
return -EINVAL;
}
break;
case TT_START_SEG:
if(ll != 4) {
if(report_func)
report_func(LOG_ERR,
"%d: Record %d(START_SEG): Bad len = %d\n",
hexdata->last_line, tt, ll);
return -EINVAL;
}
if(offset != 0) {
if(report_func)
report_func(LOG_ERR,
"%d: Record %d(START_SEG): Bad offset = %d\n",
hexdata->last_line, tt, offset);
return -EINVAL;
}
break;
case TT_EXT_LIN:
if(ll != 2) {
if(report_func)
report_func(LOG_ERR,
"%d: Record %d(EXT_LIN): Bad len = %d\n",
hexdata->last_line, tt, ll);
return -EINVAL;
}
if(offset != 0) {
if(report_func)
report_func(LOG_ERR,
"%d: Record %d(EXT_LIN): Bad offset = %d\n",
hexdata->last_line, tt, ll);
return -EINVAL;
}
break;
case TT_START_LIN: /* Unimplemented */
if(ll != 4) {
if(report_func)
report_func(LOG_ERR,
"%d: Record %d(EXT_LIN): Bad len = %d\n",
hexdata->last_line, tt, ll);
return -EINVAL;
}
if(offset != 0) {
if(report_func)
report_func(LOG_ERR,
"%d: Record %d(EXT_LIN): Bad offset = %d\n",
hexdata->last_line, tt, ll);
return -EINVAL;
}
break;
default:
if(report_func)
report_func(LOG_ERR, "%d: Unimplemented record type %d: %s\n",
hexdata->last_line, tt, buf);
return -EINVAL;
}
buf += 8; /* Skip header */
if((hexline = new_hexline(ll, offset, tt)) == NULL) {
if(report_func)
report_func(LOG_ERR, "No more memory for hexfile lines\n");
return -EINVAL;
}
p = buf;
for(i = 0; i < ll + 1; i++) { /* include checksum */
unsigned int val;
if((*p == '\0') || (*(p+1) == '\0')) {
if(report_func)
report_func(LOG_ERR, "Short data string '%s'\n", buf);
return -EINVAL;
}
ret = sscanf(p, "%02X", &val);
if(ret != 1) {
if(report_func)
report_func(LOG_ERR, "Bad data byte #%d\n", i);
return -EINVAL;
}
hexline->d.content.tt_data.data[i] = val;
p += 2;
}
if(hexline_checksum(hexline) != 0) {
if(report_func) {
report_func(LOG_ERR, "Bad checksum (%d instead of 0)\n",
hexline_checksum(hexline));
dump_hexline(hexdata->last_line, hexline, stderr);
}
return -EINVAL;
}
hexdata->lines[hexdata->last_line] = hexline;
if(hexdata->got_eof)
return 0;
hexdata->last_line++;
return 1;
}
void free_hexdata(struct hexdata *hexdata)
{
if(hexdata) {
unsigned int i;
for(i = 0; i < hexdata->maxlines; i++)
if(hexdata->lines[i] != NULL)
free(hexdata->lines[i]);
free(hexdata);
}
}
int dump_hexfile(struct hexdata *hexdata, const char *outfile)
{
FILE *fp;
unsigned int i;
if(report_func)
report_func(LOG_INFO, "Dumping hex data into '%s'\n", outfile);
if(!outfile || strcmp(outfile, "-") == 0)
fp = stdout;
else if((fp = fopen(outfile, "w")) == NULL) {
perror(outfile);
exit(1);
}
for(i = 0; i <= hexdata->last_line; i++) {
struct hexline *line = hexdata->lines[i];
if(!line) {
if(report_func)
report_func(LOG_ERR, "Missing line at #%d\n", i);
return -EINVAL;
}
if(!dump_hexline(i, line, fp))
return -EINVAL;
}
return 0;
}
int dump_hexfile2(struct hexdata *hexdata, const char *outfile, uint8_t maxwidth)
{
FILE *fp;
uint8_t tt;
unsigned int i;
struct hexline *line;
if(report_func)
report_func(LOG_INFO,
"Dumping hex data into '%s' (maxwidth=%d)\n",
outfile, maxwidth);
if(!outfile || strcmp(outfile, "-") == 0)
fp = stdout;
else if((fp = fopen(outfile, "w")) == NULL) {
perror(outfile);
exit(1);
}
if(maxwidth == 0)
maxwidth = UINT8_MAX;
for(i = 0; i <= hexdata->last_line; i++) {
int bytesleft = 0;
int extra_offset = 0;
int base_offset;
uint8_t *base_data;
line = hexdata->lines[i];
if(!line) {
if(report_func)
report_func(LOG_ERR, "Missing line at #%d\n", i);
return -EINVAL;
}
bytesleft = line->d.content.header.ll;
/* split the line into several lines */
tt = line->d.content.header.tt;
base_offset = line->d.content.header.offset;
base_data = line->d.content.tt_data.data;
while (bytesleft > 0) {
struct hexline *extraline;
uint8_t new_chksum;
unsigned int curr_bytes = (bytesleft >= maxwidth) ? maxwidth : bytesleft;
/* generate the new line */
if((extraline = new_hexline(curr_bytes, base_offset + extra_offset, tt)) == NULL) {
if(report_func)
report_func(LOG_ERR, "No more memory for hexfile lines\n");
return -EINVAL;
}
memcpy(extraline->d.content.tt_data.data, base_data + extra_offset, curr_bytes);
new_chksum = 0xFF - hexline_checksum(extraline) + 1;
extraline->d.content.tt_data.data[curr_bytes] = new_chksum;
/* print it */
dump_hexline(i, extraline, fp);
/* cleanups */
free(extraline);
extra_offset += curr_bytes;
bytesleft -= curr_bytes;
}
}
if(tt != TT_EOF) {
if(report_func)
report_func(LOG_ERR, "Missing EOF record\n");
return -EINVAL;
}
dump_hexline(i, line, fp);
return 0;
}
void process_comment(struct hexdata *hexdata, char buf[])
{
char *dollar_start;
char *dollar_end;
const char id_prefix[] = "Id: ";
char tmp[BUFSIZ];
char *p;
int len;
if(report_func)
report_func(LOG_INFO, "Comment: %s\n", buf + 1);
/* Search for RCS keywords */
if((dollar_start = strchr(buf, '$')) == NULL)
return;
if((dollar_end = strchr(dollar_start + 1, '$')) == NULL)
return;
/* Crop the '$' signs */
len = dollar_end - dollar_start;
len -= 2;
memcpy(tmp, dollar_start + 1, len);
tmp[len] = '\0';
p = tmp;
if(strstr(tmp, id_prefix) == NULL)
return;
p += strlen(id_prefix);
if((p = strchr(p, ' ')) == NULL)
return;
p++;
snprintf(hexdata->version_info, BUFSIZ, "%s", p);
if((p = strchr(hexdata->version_info, ' ')) != NULL)
*p = '\0';
}
struct hexdata *parse_hexfile(const char *fname, unsigned int maxlines)
{
FILE *fp;
struct hexdata *hexdata = NULL;
int datasize;
char buf[BUFSIZ];
int line;
int dos_eof = 0;
int ret;
assert(fname != NULL);
if(report_func)
report_func(LOG_INFO, "Parsing %s\n", fname);
datasize = sizeof(struct hexdata) + maxlines * sizeof(char *);
hexdata = (struct hexdata *)malloc(datasize);
if(!hexdata) {
if(report_func)
report_func(LOG_ERR, "Failed to allocate %d bytes for hexfile contents\n", datasize);
goto err;
}
memset(hexdata, 0, datasize);
hexdata->maxlines = maxlines;
if((fp = fopen(fname, "r")) == NULL) {
if(report_func)
report_func(LOG_ERR, "Failed to open hexfile '%s'\n", fname);
goto err;
}
snprintf(hexdata->fname, PATH_MAX, "%s", fname);
for(line = 1; fgets(buf, BUFSIZ, fp); line++) {
if(dos_eof) {
if(report_func)
report_func(LOG_ERR, "%s:%d - Got DOS EOF character before true EOF\n", fname, line);
goto err;
}
if(buf[0] == 0x1A && buf[1] == '\0') { /* DOS EOF char */
dos_eof = 1;
continue;
}
chomp(buf);
if(buf[0] == '\0') {
if(report_func)
report_func(LOG_ERR, "%s:%d - Short line\n", fname, line);
goto err;
}
if(buf[0] == '#') {
process_comment(hexdata, buf);
continue;
}
if(buf[0] != ':') {
if(report_func)
report_func(LOG_ERR, "%s:%d - Line begins with 0x%X\n", fname, line, buf[0]);
goto err;
}
if((ret = append_hexline(hexdata, buf + 1)) < 0) {
if(report_func)
report_func(LOG_ERR, "%s:%d - Failed parsing.\n", fname, line);
goto err;
}
}
fclose(fp);
if(report_func)
report_func(LOG_INFO, "%s parsed OK\n", fname);
return hexdata;
err:
free_hexdata(hexdata);
return NULL;
}
void dump_binary(struct hexdata *hexdata, const char *outfile)
{
FILE *fp;
unsigned int i;
size_t len;
if(report_func)
report_func(LOG_INFO, "Dumping binary data into '%s'\n", outfile);
if((fp = fopen(outfile, "w")) == NULL) {
perror(outfile);
exit(1);
}
for(i = 0; i < hexdata->maxlines; i++) {
struct hexline *hexline = hexdata->lines[i];
if(!hexline)
break;
switch(hexline->d.content.header.tt) {
case TT_EOF:
if(report_func)
report_func(LOG_INFO, "\ndump: good EOF record");
break;
case TT_DATA:
if(report_func)
report_func(LOG_INFO, "dump: %6d\r", i);
len = hexline->d.content.header.ll;
if(fwrite(hexline->d.content.tt_data.data, 1, len, fp) != len) {
perror("write");
exit(1);
}
break;
case TT_EXT_SEG:
case TT_START_SEG:
case TT_EXT_LIN:
case TT_START_LIN:
if(report_func)
report_func(LOG_INFO,
"\ndump(%d): ignored record type %d",
i, hexline->d.content.header.tt);
break;
default:
if(report_func)
report_func(LOG_ERR, "dump: Unknown record type %d\n",
hexline->d.content.header.tt);
exit(1);
}
}
if(report_func)
report_func(LOG_INFO, "\nDump finished\n");
fclose(fp);
}
void gen_hexline(const uint8_t *data, uint16_t addr, size_t len, FILE *output)
{
struct hexline *hexline;
if(!data) {
fprintf(output, ":%02X%04X%02XFF\n", 0, 0, TT_EOF);
return;
}
if((hexline = new_hexline(len, addr, (!data) ? TT_EOF : TT_DATA)) == NULL) {
if(report_func)
report_func(LOG_ERR, "No more memory\n");
return;
}
if(data)
memcpy(&hexline->d.content.tt_data, data, len);
dump_hexline(0, hexline, output);
free(hexline);
}
/*
* Algorithm lifted of sum(1) implementation from coreutils.
* We chose the default algorithm (BSD style).
*/
int bsd_checksum(struct hexdata *hexdata)
{
unsigned int i;
size_t len;
int ck = 0;
for(i = 0; i < hexdata->maxlines; i++) {
struct hexline *hexline = hexdata->lines[i];
unsigned char *p;
if(!hexline)
break;
if(hexline->d.content.header.tt == TT_EOF)
continue;
len = hexline->d.content.header.ll;
p = hexline->d.content.tt_data.data;
for(; len; p++, len--) {
ck = (ck >> 1) + ((ck & 1) << 15);
ck += *p;
ck &= 0xffff; /* Keep it within bounds. */
}
}
return ck;
}