Adding upstream version 1:10.11.6.upstream/1%10.11.6

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 229 insertions, 0 deletions

diff --git a/mysys/string.c b/mysys/string.c
new file mode 100644
index 00000000..91e4306c
--- /dev/null
+++ b/mysys/string.c
@@ -0,0 +1,229 @@
+/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
+
+   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 */
+
+/*
+  Code for handling strings with can grow dynamicly.
+  Copyright Monty Program KB.
+  By monty.
+*/
+
+#include "mysys_priv.h"
+#include <m_string.h>
+
+my_bool init_dynamic_string(DYNAMIC_STRING *str, const char *init_str,
+			    size_t init_alloc, size_t alloc_increment)
+{
+  size_t length;
+  DBUG_ENTER("init_dynamic_string");
+
+  if (!alloc_increment)
+    alloc_increment=128;
+  length=1;
+  if (init_str && (length= 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*) my_malloc(key_memory_DYNAMIC_STRING,
+                                   init_alloc, MYF(MY_WME))))
+    DBUG_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;
+  DBUG_RETURN(FALSE);
+}
+
+
+my_bool dynstr_set(DYNAMIC_STRING *str, const char *init_str)
+{
+  uint length=0;
+  DBUG_ENTER("dynstr_set");
+
+  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*) my_realloc(key_memory_DYNAMIC_STRING,
+                                      str->str, str->max_length, MYF(MY_WME))))
+      DBUG_RETURN(TRUE);
+  }
+  if (init_str)
+  {
+    str->length=length-1;
+    memcpy(str->str,init_str,length);
+  }
+  else
+    str->length=0;
+  DBUG_RETURN(FALSE);
+}
+
+
+my_bool dynstr_realloc(DYNAMIC_STRING *str, size_t additional_size)
+{
+  DBUG_ENTER("dynstr_realloc");
+
+  if (!additional_size) DBUG_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*) my_realloc(key_memory_DYNAMIC_STRING, str->str,
+                                      str->max_length, MYF(MY_WME))))
+      DBUG_RETURN(TRUE);
+  }
+  DBUG_RETURN(FALSE);
+}
+
+
+my_bool dynstr_append(DYNAMIC_STRING *str, const char *append)
+{
+  return dynstr_append_mem(str,append,(uint) strlen(append));
+}
+
+
+my_bool dynstr_append_mem(DYNAMIC_STRING *str, const char *append,
+			  size_t length)
+{
+  char *new_ptr;
+  DBUG_ENTER("dynstr_append_mem");
+  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*) my_realloc(key_memory_DYNAMIC_STRING, str->str,
+                                     new_length, MYF(MY_WME))))
+      DBUG_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 */
+  DBUG_RETURN(FALSE);
+}
+
+
+my_bool dynstr_trunc(DYNAMIC_STRING *str, size_t n)
+{
+  str->length-=n;
+  str->str[str->length]= '\0';
+  return FALSE;
+}
+
+/*
+  Concatenates any number of strings, escapes any OS quote in the result then
+  surround the whole affair in another set of quotes which is finally appended
+  to specified DYNAMIC_STRING.  This function is especially useful when 
+  building strings to be executed with the system() function.
+
+  @param str Dynamic String which will have addtional strings appended.
+  @param append String to be appended.
+  @param ... Optional. Additional string(s) to be appended.
+
+  @note The final argument in the list must be NullS even if no additional
+  options are passed.
+
+  @return True = Success.
+*/
+
+my_bool dynstr_append_os_quoted(DYNAMIC_STRING *str, const char *append, ...)
+{
+#ifdef _WIN32
+  LEX_CSTRING quote= { C_STRING_WITH_LEN("\"") };
+  LEX_CSTRING replace= { C_STRING_WITH_LEN("\\\"") };
+#else
+  LEX_CSTRING quote= { C_STRING_WITH_LEN("\'") };
+  LEX_CSTRING replace= { C_STRING_WITH_LEN("'\"'\"'") };
+#endif /* _WIN32 */
+  my_bool ret= TRUE;
+  va_list dirty_text;
+
+  ret&= dynstr_append_mem(str, quote.str, quote.length); /* Leading quote */
+  va_start(dirty_text, append);
+  while (append != NullS)
+  {
+    const char  *cur_pos= append;
+    const char *next_pos= cur_pos;
+
+    /* Search for quote in each string and replace with escaped quote */
+    while(*(next_pos= strcend(cur_pos, quote.str[0])) != '\0')
+    {
+      ret&= dynstr_append_mem(str, cur_pos, (uint) (next_pos - cur_pos));
+      ret&= dynstr_append_mem(str, replace.str, replace.length);
+      cur_pos= next_pos + 1;
+    }
+    ret&= dynstr_append_mem(str, cur_pos, (uint) (next_pos - cur_pos));
+    append= va_arg(dirty_text, char *);
+  }
+  va_end(dirty_text);
+  ret&= dynstr_append_mem(str, quote.str, quote.length); /* Trailing quote */
+
+  return ret;
+}
+
+my_bool dynstr_append_quoted(DYNAMIC_STRING *str,
+                             const char *append, size_t len,
+                             char quote)
+{
+  size_t additional= (str->alloc_increment ? str->alloc_increment : 10);
+  size_t lim= additional;
+  size_t i;
+  if (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 (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;
+}
+
+
+void dynstr_free(DYNAMIC_STRING *str)
+{
+  if (str->str)                             /* Safety to allow double free */
+    my_free(str->str);
+  str->str= NULL;
+}
+
+
+/* Give over the control of the dynamic string to caller */
+
+void dynstr_reassociate(DYNAMIC_STRING *str, char **ptr, size_t *length,
+                        size_t *alloc_length)
+{
+  *ptr=          str->str;
+  *length=       str->length;
+  *alloc_length= str->max_length;
+  str->str=0;
+}