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/* $Id$ */
#include <sys/types.h>
#ifndef S_SPLINT_S
#include <unistd.h>
#endif /* S_SPLINT_S */
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdbool.h>
#include <ctype.h>
#include "gpsd_config.h"
#include "gpsd.h"
static int verbose = 0;
static bool scaled = true;
static bool json = false;
/**************************************************************************
*
* Generic machinery
*
**************************************************************************/
void gpsd_report(int errlevel, const char *fmt, ... )
/* assemble command in printf(3) style, use stderr or syslog */
{
if (errlevel <= verbose) {
char buf[BUFSIZ];
va_list ap;
(void)strlcpy(buf, "gpsdecode: ", BUFSIZ);
va_start(ap, fmt) ;
(void)vsnprintf(buf + strlen(buf), sizeof(buf)-strlen(buf), fmt, ap);
va_end(ap);
(void)fputs(buf, stdout);
}
}
/*@ -compdestroy -compdef -usedef @*/
static void decode(FILE *fpin, FILE *fpout)
/* RTCM-104 bits on fpin to dump format on fpout */
{
struct gps_packet_t lexer;
struct rtcm2_t rtcm2;
struct rtcm3_t rtcm3;
struct aivdm_context_t aivdm;
char buf[BUFSIZ];
packet_reset(&lexer);
while (packet_get(fileno(fpin), &lexer) > 0) {
if (lexer.type == COMMENT_PACKET)
continue;
else if (lexer.type == RTCM2_PACKET) {
rtcm2_unpack(&rtcm2, (char *)lexer.isgps.buf);
rtcm2_dump(&rtcm2, buf, sizeof(buf));
(void)fputs(buf, fpout);
}
else if (lexer.type == RTCM3_PACKET) {
rtcm3_unpack(&rtcm3, (char *)lexer.outbuffer);
rtcm3_dump(&rtcm3, stdout);
}
else if (lexer.type == AIVDM_PACKET) {
/*@ -uniondef */
if (aivdm_decode((char *)lexer.outbuffer, lexer.outbuflen, &aivdm))
aivdm_dump(&aivdm.decoded, scaled, json, stdout);
/*@ +uniondef */
}
}
}
/*@ +compdestroy +compdef +usedef @*/
/*@ -compdestroy @*/
static void pass(FILE *fpin, FILE *fpout)
/* dump format on stdin to dump format on stdout (self-inversion test) */
{
char buf[BUFSIZ];
struct gps_packet_t lexer;
struct rtcm2_t rtcm;
memset(&lexer, 0, sizeof(lexer));
memset(&rtcm, 0, sizeof(rtcm));
while (fgets(buf, (int)sizeof(buf), fpin) != NULL) {
int status;
/* pass through comment lines without interpreting */
if (buf[0] == '#') {
(void)fputs(buf, fpout);
continue;
}
/* ignore trailer lines as we'll regenerate these */
else if (buf[0] == '.')
continue;
status = rtcm2_undump(&rtcm, buf);
if (status == 0) {
(void)memset(lexer.isgps.buf, 0, sizeof(lexer.isgps.buf));
(void)rtcm2_repack(&rtcm, lexer.isgps.buf);
(void)rtcm2_unpack(&rtcm, (char *)lexer.isgps.buf);
(void)rtcm2_dump(&rtcm, buf, sizeof(buf));
(void)fputs(buf, fpout);
memset(&lexer, 0, sizeof(lexer));
memset(&rtcm, 0, sizeof(rtcm));
} else if (status < 0) {
(void) fprintf(stderr, "gpsdecode: bailing out with status %d\n", status);
exit(1);
}
}
}
/*@ +compdestroy @*/
/*@ -compdestroy @*/
static void encode(FILE *fpin, FILE *fpout)
/* dump format on fpin to RTCM-104 on fpout */
{
char buf[BUFSIZ];
struct gps_packet_t lexer;
struct rtcm2_t rtcm;
memset(&lexer, 0, sizeof(lexer));
while (fgets(buf, (int)sizeof(buf), fpin) != NULL) {
int status;
status = rtcm2_undump(&rtcm, buf);
if (status == 0) {
(void)memset(lexer.isgps.buf, 0, sizeof(lexer.isgps.buf));
(void)rtcm2_repack(&rtcm, lexer.isgps.buf);
if (fwrite(lexer.isgps.buf,
sizeof(isgps30bits_t),
(size_t)rtcm.length, fpout) != (size_t)rtcm.length)
(void) fprintf(stderr, "gpsdecode: report write failed.\n");
memset(&lexer, 0, sizeof(lexer));
} else if (status < 0) {
(void) fprintf(stderr, "gpsdecode: bailing out with status %d\n", status);
exit(1);
}
}
}
/*@ +compdestroy @*/
int main(int argc, char **argv)
{
char buf[BUFSIZ];
int c;
bool striphdr = false;
enum {doencode, dodecode, passthrough} mode = dodecode;
while ((c = getopt(argc, argv, "dhejpuVD:")) != EOF) {
switch (c) {
case 'd':
mode = dodecode;
break;
case 'e':
mode = doencode;
break;
case 'h':
striphdr = true;
break;
case 'j':
json = true;
break;
case 'p': /* undocumented, used for regression-testing */
mode = passthrough;
break;
case 'u':
scaled = false;
break;
case 'D':
verbose = atoi(optarg);
gpsd_hexdump_level = verbose;
break;
case 'V':
(void)fprintf(stderr, "SVN ID: $Id$ \n");
exit(0);
case '?':
default:
(void)fputs("gpsdecode [-v]\n", stderr);
exit(1);
}
}
argc -= optind;
argv += optind;
/* strip lines with leading # */
if (striphdr) {
while ((c = getchar()) == '#')
if (fgets(buf, (int)sizeof(buf), stdin) == NULL)
(void)fputs("gpsdecode: read failed\n", stderr);
(void)ungetc(c, stdin);
}
if (mode == passthrough)
pass(stdin, stdout);
else if (mode == doencode)
encode(stdin, stdout);
else
decode(stdin, stdout);
exit(0);
}
/* gpsdecode.c ends here */
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