1 files changed, 147 insertions, 0 deletions
diff --git a/sql/gstream.cc b/sql/gstream.cc
new file mode 100644
index 00000000..f8e84e70
--- /dev/null
+++ b/sql/gstream.cc
@@ -0,0 +1,147 @@
+/* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+   Copyright (c) 2009, 2020, MariaDB Corporation.
+
+   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; version 2 of the License.
+
+   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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA */
+
+/*
+  Functions to read and parse geometrical data.
+  NOTE: These functions assumes that the string is end \0 terminated!
+*/
+
+#include "mariadb.h"
+#include "sql_priv.h"
+#include "gstream.h"
+#include "m_string.h"                           // LEX_STRING
+#include "mysqld.h"
+
+enum Gis_read_stream::enum_tok_types Gis_read_stream::get_next_toc_type()
+{
+  skip_space();
+  if (m_cur >= m_limit)
+    return eostream;
+  if (my_isvar_start(&my_charset_bin, *m_cur))
+    return word;
+  if ((*m_cur >= '0' && *m_cur <= '9') || *m_cur == '-' || *m_cur == '+')
+    return numeric;
+  if (*m_cur == '(')
+    return l_bra;
+  if (*m_cur == ')')
+    return r_bra;
+  if (*m_cur == ',')
+    return comma;
+  return unknown;
+}
+
+
+bool Gis_read_stream::lookup_next_word(LEX_STRING *res)
+{
+  const char *cur= m_cur;
+
+  skip_space();
+  res->str= (char*) cur;
+  /* The following will also test for \0 */
+  if ((cur >= m_limit) || !my_isvar_start(&my_charset_bin, *cur))
+    return 1;
+
+  /*
+    We can't combine the following increment with my_isvar() because
+    my_isvar() is a macro that would cause side effects
+  */
+  cur++;
+  while ((cur < m_limit) && my_isvar(&my_charset_bin, *cur))
+    cur++;
+
+  res->length= (uint32) (cur - res->str);
+  return 0;
+}
+
+
+bool Gis_read_stream::get_next_word(LEX_STRING *res)
+{
+  skip_space();
+  res->str= (char*) m_cur;
+  /* The following will also test for \0 */
+  if ((m_cur >= m_limit) || !my_isvar_start(&my_charset_bin, *m_cur))
+    return 1;
+
+  /*
+    We can't combine the following increment with my_isvar() because
+    my_isvar() is a macro that would cause side effects
+  */
+  m_cur++;
+  while ((m_cur < m_limit) && my_isvar(&my_charset_bin, *m_cur))
+    m_cur++;
+
+  res->length= (uint32) (m_cur - res->str);
+  return 0;
+}
+
+
+/*
+  Read a floating point number
+
+  NOTE: Number must start with a digit or sign. It can't start with a decimal
+  point
+*/
+
+bool Gis_read_stream::get_next_number(double *d)
+{
+  char *endptr;
+  int err;
+
+  skip_space();
+
+  if ((m_cur >= m_limit) ||
+      ((*m_cur < '0' || *m_cur > '9') && *m_cur != '-' && *m_cur != '+'))
+  {
+    set_error_msg("Numeric constant expected");
+    return 1;
+  }
+
+  *d = m_charset->strntod((char *)m_cur, (uint) (m_limit-m_cur), &endptr, &err);
+  if (err)
+    return 1;
+  if (endptr)
+    m_cur = endptr;
+  return 0;
+}
+
+
+bool Gis_read_stream::check_next_symbol(char symbol)
+{
+  skip_space();
+  if ((m_cur >= m_limit) || (*m_cur != symbol))
+  {
+    char buff[32];
+    strmov(buff, "'?' expected");
+    buff[2]= symbol;
+    set_error_msg(buff);
+    return 1;
+  }
+  m_cur++;
+  return 0;
+}
+
+
+/*
+  Remember error message.
+*/
+
+void Gis_read_stream::set_error_msg(const char *msg)
+{
+  size_t len= strlen(msg);			// ok in this context
+  m_err_msg= (char *) my_realloc(key_memory_Gis_read_stream_err_msg,
+                                 m_err_msg, (uint) len + 1, MYF(MY_ALLOW_ZERO_PTR));
+  memcpy(m_err_msg, msg, len + 1);
+}