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/* $Id: rtcmdecode.c 4069 2006-12-04 12:31:50Z esr $ */
#include <sys/types.h>
#include <unistd.h>
#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 = ISGPS_ERRLEVEL_BASE;
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, "rtcmdecode: ", BUFSIZ);
va_start(ap, fmt) ;
(void)vsnprintf(buf + strlen(buf), sizeof(buf)-strlen(buf), fmt, ap);
va_end(ap);
(void)fputs(buf, stdout);
}
}
/*@ -compdestroy @*/
static void decode(FILE *fpin, FILE *fpout)
/* RTCM-104 bits on fpin to dump format on fpout */
{
int c;
struct gps_packet_t lexer;
struct rtcm_t rtcm;
enum isgpsstat_t res;
off_t count;
char buf[BUFSIZ];
isgps_init(&lexer);
count = 0;
while ((c = fgetc(fpin)) != EOF) {
res = rtcm_decode(&lexer, (unsigned int)c);
if (verbose >= ISGPS_ERRLEVEL_BASE + 3)
fprintf(fpout, "%08lu: '%c' [%02x] -> %d\n",
(unsigned long)count++, (isprint(c)?c:'.'), (unsigned)(c & 0xff), res);
if (res == ISGPS_MESSAGE) {
rtcm_unpack(&rtcm, (char *)lexer.isgps.buf);
rtcm_dump(&rtcm, buf, sizeof(buf));
(void)fputs(buf, fpout);
}
}
}
/*@ +compdestroy @*/
/*@ -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 rtcm_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;
}
status = rtcm_undump(&rtcm, buf);
if (status == 0) {
(void)memset(lexer.isgps.buf, 0, sizeof(lexer.isgps.buf));
(void)rtcm_repack(&rtcm, lexer.isgps.buf);
(void)rtcm_unpack(&rtcm, (char *)lexer.isgps.buf);
(void)rtcm_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, "rtcmdecode: 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 rtcm_t rtcm;
memset(&lexer, 0, sizeof(lexer));
while (fgets(buf, (int)sizeof(buf), fpin) != NULL) {
int status;
status = rtcm_undump(&rtcm, buf);
if (status == 0) {
(void)memset(lexer.isgps.buf, 0, sizeof(lexer.isgps.buf));
(void)rtcm_repack(&rtcm, lexer.isgps.buf);
(void)fwrite(lexer.isgps.buf,
sizeof(isgps30bits_t),
(size_t)rtcm.length, fpout);
memset(&lexer, 0, sizeof(lexer));
} else if (status < 0) {
(void) fprintf(stderr, "rtcmdecode: 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, "dehpVv:")) != EOF) {
switch (c) {
case 'd':
mode = dodecode;
break;
case 'e':
mode = doencode;
break;
case 'h':
striphdr = true;
break;
case 'p': /* undocumented, used for regression-testing */
mode = passthrough;
break;
case 'v':
verbose = ISGPS_ERRLEVEL_BASE + atoi(optarg);
break;
case 'V':
(void)fprintf(stderr, "SVN ID: $Id: rtcmdecode.c 4069 2006-12-04 12:31:50Z esr $ \n");
exit(0);
case '?':
default:
(void)fputs("rtcmdecode [-v]\n", stderr);
exit(1);
}
}
argc -= optind;
argv += optind;
/* strip lines with leading # */
if (striphdr) {
while ((c = getchar()) == '#')
(void)fgets(buf, (int)sizeof(buf), stdin);
(void)ungetc(c, stdin);
}
if (mode == passthrough)
pass(stdin, stdout);
else if (mode == doencode)
encode(stdin, stdout);
else
decode(stdin, stdout);
exit(0);
}
/* rtcmdecode.c ends here */
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