Function pn_data_vscan

c/src/core/codec.c:845–1229

static pni_node_t *pni_data_peek(pn_data_t *data);

int pn_data_vscan(pn_data_t *data, const char *fmt, va_list ap)
{
  pn_data_rewind(data);
  bool *scanarg = NULL;
  bool at = false;
  int level = 0;
  int count_level = -1;
  int resume_count = 0;

  while (*fmt) {
    char code = *(fmt++);

    bool found = false;
    pn_type_t type;

    bool scanned = false;
    bool suspend = resume_count > 0;

    switch (code) {
    case 'n':
      found = pn_scan_next(data, &type, suspend);
      if (found && type == PN_NULL) {
        scanned = true;
      } else {
        scanned = false;
      }
      if (resume_count && level == count_level) resume_count--;
      break;
    case 'o':
      {
        bool *value = va_arg(ap, bool *);
        found = pn_scan_next(data, &type, suspend);
        if (found && type == PN_BOOL) {
          *value = pn_data_get_bool(data);
          scanned = true;
        } else {
          *value = 0;
          scanned = false;
        }
      }
      if (resume_count && level == count_level) resume_count--;
      break;
    case 'B':
      {
        uint8_t *value = va_arg(ap, uint8_t *);
        found = pn_scan_next(data, &type, suspend);
        if (found && type == PN_UBYTE) {
          *value = pn_data_get_ubyte(data);
          scanned = true;
        } else {
          *value = 0;
          scanned = false;
        }
      }
      if (resume_count && level == count_level) resume_count--;
      break;
    case 'b':
      {