Add MariaDB Connector/C as a built-in alternative (v3.2.3).

vendor/MDBC/libmariadb/ma_string.c

@@ -0,0 +1,163 @@
+/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
+                 2016 MariaDB Corporation AB
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+   
+   This library 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
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+   MA 02111-1301, USA */
+
+/*
+  Code for handling strings which can grow dynamically.
+  Copyright Monty Program KB.
+  By monty.
+*/
+
+#include <ma_global.h>
+#include <ma_sys.h>
+#include <ma_string.h>
+
+my_bool ma_init_dynamic_string(DYNAMIC_STRING *str, const char *init_str,
+			    size_t init_alloc, size_t alloc_increment)
+{
+  uint length;
+
+  if (!alloc_increment)
+    alloc_increment=128;
+  length=1;
+  if (init_str && (length= (uint) strlen(init_str)+1) < init_alloc)
+    init_alloc=((length+alloc_increment-1)/alloc_increment)*alloc_increment;
+  if (!init_alloc)
+    init_alloc=alloc_increment;
+
+  if (!(str->str=(char*) malloc(init_alloc)))
+    return(TRUE);
+  str->length=length-1;
+  if (init_str)
+    memcpy(str->str,init_str,length);
+  str->max_length=init_alloc;
+  str->alloc_increment=alloc_increment;
+  return(FALSE);
+}
+
+my_bool ma_dynstr_set(DYNAMIC_STRING *str, const char *init_str)
+{
+  uint length;
+
+  if (init_str && (length= (uint) strlen(init_str)+1) > str->max_length)
+  {
+    str->max_length=((length+str->alloc_increment-1)/str->alloc_increment)*
+      str->alloc_increment;
+    if (!str->max_length)
+      str->max_length=str->alloc_increment;
+    if (!(str->str=(char*) realloc(str->str,str->max_length)))
+      return(TRUE);
+  }
+  if (init_str)
+  {
+    str->length=length-1;
+    memcpy(str->str,init_str,length);
+  }
+  else
+    str->length=0;
+  return(FALSE);
+}
+
+
+my_bool ma_dynstr_realloc(DYNAMIC_STRING *str, size_t additional_size)
+{
+  if (!additional_size) return(FALSE);
+  if (str->length + additional_size > str->max_length)
+  {
+    str->max_length=((str->length + additional_size+str->alloc_increment-1)/
+		     str->alloc_increment)*str->alloc_increment;
+    if (!(str->str=(char*) realloc(str->str,str->max_length)))
+      return(TRUE);
+  }
+  return(FALSE);
+}
+
+
+my_bool ma_dynstr_append(DYNAMIC_STRING *str, const char *append)
+{
+  return ma_dynstr_append_mem(str,append,strlen(append));
+}
+
+my_bool ma_dynstr_append_quoted(DYNAMIC_STRING *str,
+                             const char *append, size_t len,
+                             char quote)
+{
+  size_t additional= str->alloc_increment;
+  size_t lim= additional;
+  uint i;
+
+  if (ma_dynstr_realloc(str, len + additional + 2))
+    return TRUE;
+  str->str[str->length++]= quote;
+  for (i= 0; i < len; i++)
+  {
+    register char c= append[i];
+    if (c == quote || c == '\\')
+    {
+      if (!lim)
+      {
+        if (ma_dynstr_realloc(str, additional))
+          return TRUE;
+        lim= additional;
+      }
+      lim--;
+      str->str[str->length++]= '\\';
+    }
+    str->str[str->length++]= c;
+  }
+  str->str[str->length++]= quote;
+  return FALSE;
+}
+
+my_bool ma_dynstr_append_mem(DYNAMIC_STRING *str, const char *append,
+			  size_t length)
+{
+  char *new_ptr;
+  if (str->length+length >= str->max_length)
+  {
+    size_t new_length=(str->length+length+str->alloc_increment)/
+      str->alloc_increment;
+    new_length*=str->alloc_increment;
+    if (!(new_ptr=(char*) realloc(str->str,new_length)))
+      return TRUE;
+    str->str=new_ptr;
+    str->max_length=new_length;
+  }
+  memcpy(str->str + str->length,append,length);
+  str->length+=length;
+  str->str[str->length]=0;			/* Safety for C programs */
+  return FALSE;
+}
+
+
+void ma_dynstr_free(DYNAMIC_STRING *str)
+{
+  if (str->str)
+  {
+    free(str->str);
+    str->str=0;
+  }
+}
+
+char *ma_strmake(register char *dst, register const char *src, size_t length)
+{
+  while (length--)
+    if (! (*dst++ = *src++))
+      return dst-1;
+  *dst=0;
+  return dst;
+}