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*/
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*/
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char *
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char *
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get_string ( garmin_packet * p, int * offset )
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get_string ( garmin_packet * p, int * offset )
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{
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{
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  char * start  = (char *)(p->packet.data + *offset);
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  char * start;
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  char * cursor = start;
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  char * cursor;
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  int    allow  = garmin_packet_size(p) - *offset;
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  int    allow;
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  char * ret    = NULL;
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  char * ret    = NULL;
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  int    bytes  = 0;
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  int    bytes  = 0;
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  /* early exit */
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  /* early exit */
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  if (!p || !offset) return NULL;
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  start  = (char *)(p->packet.data + *offset);
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  cursor = start;
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  allow  = garmin_packet_size(p) - *offset;
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  if ( allow <= 0 ) return NULL;
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  if ( allow <= 0 ) return NULL;
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  /* OK, we have space to work with. */
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  /* OK, we have space to work with. */
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  char * start  = (char *)*buf;
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  char * start  = (char *)*buf;
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  char * cursor = start;
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  char * cursor = start;
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  char * ret    = NULL;
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  char * ret    = NULL;
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  int    bytes  = 0;
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  int    bytes  = 0;
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  if (!buf) return NULL;
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  do { bytes++; } while ( *cursor++ );
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  do { bytes++; } while ( *cursor++ );
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  ret = malloc(bytes);
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  ret = malloc(bytes);
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  strncpy(ret,start,bytes-1);
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  strncpy(ret,start,bytes-1);
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