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mariadb/server-tools/instance-manager/parse.cc
monty@mysql.com/nosik.monty.fi ca99516cc7 Fixed a lot of compiler warnings (Mainly in mysqld and instance manager) 
Fixed some possible fatal wrong arguments to printf() style functions
Initialized some not initialized variables
Fixed bug in stored procedure and continue handlers
(Fixes Bug#22150)
2006-11-01 19:41:09 +02:00

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/* Copyright (C) 2004 MySQL AB
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; either version 2 of the License, or
(at your option) any later version.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "parse.h"
#include "commands.h"
enum Token
{
TOK_CREATE= 0,
TOK_DROP,
TOK_ERROR, /* Encodes the "ERROR" word, it doesn't indicate error. */
TOK_FILES,
TOK_FLUSH,
TOK_GENERAL,
TOK_INSTANCE,
TOK_INSTANCES,
TOK_LOG,
TOK_OPTIONS,
TOK_SET,
TOK_SLOW,
TOK_START,
TOK_STATUS,
TOK_STOP,
TOK_SHOW,
TOK_UNSET,
TOK_NOT_FOUND, // must be after all tokens
TOK_END
};
struct tokens_st
{
uint length;
const char *tok_name;
};
static struct tokens_st tokens[]= {
{6, "CREATE"},
{4, "DROP"},
{5, "ERROR"},
{5, "FILES"},
{5, "FLUSH"},
{7, "GENERAL"},
{8, "INSTANCE"},
{9, "INSTANCES"},
{3, "LOG"},
{7, "OPTIONS"},
{3, "SET"},
{4, "SLOW"},
{5, "START"},
{6, "STATUS"},
{4, "STOP"},
{4, "SHOW"},
{5, "UNSET"}
};
/************************************************************************/
Named_value_arr::Named_value_arr() :
initialized(FALSE)
{
}
bool Named_value_arr::init()
{
if (my_init_dynamic_array(&arr, sizeof(Named_value), 0, 32))
return TRUE;
initialized= TRUE;
return FALSE;
}
Named_value_arr::~Named_value_arr()
{
if (!initialized)
return;
for (int i= 0; i < get_size(); ++i)
get_element(i).free();
delete_dynamic(&arr);
}
/************************************************************************/
/*
Returns token no if word corresponds to some token, otherwise returns
TOK_NOT_FOUND
*/
inline Token find_token(const char *word, uint word_len)
{
int i= 0;
do
{
if (my_strnncoll(default_charset_info, (const uchar *) tokens[i].tok_name,
tokens[i].length, (const uchar *) word, word_len) == 0)
break;
}
while (++i < TOK_NOT_FOUND);
return (Token) i;
}
Token get_token(const char **text, uint *word_len)
{
get_word(text, word_len);
if (*word_len)
return find_token(*text, *word_len);
return TOK_END;
}
Token shift_token(const char **text, uint *word_len)
{
Token save= get_token(text, word_len);
(*text)+= *word_len;
return save;
}
int get_text_id(const char **text, LEX_STRING *token)
{
get_word(text, &token->length);
if (token->length == 0)
return 1;
token->str= (char *) *text;
return 0;
}
static bool parse_long(const LEX_STRING *token, long *value)
{
int err_code;
char *end_ptr= token->str + token->length;
*value= (long)my_strtoll10(token->str, &end_ptr, &err_code);
return err_code != 0;
}
bool parse_option_value(const char *text, uint *text_len, char **value)
{
char beginning_quote;
const char *text_start_ptr;
char *v;
bool escape_mode= FALSE;
if (!*text || (*text != '\'' && *text != '"'))
return TRUE; /* syntax error: string expected. */
beginning_quote= *text;
++text; /* skip the beginning quote. */
text_start_ptr= text;
if (!(v= Named_value::alloc_str(text)))
return TRUE;
*value= v;
while (TRUE)
{
if (!*text)
{
Named_value::free_str(value);
return TRUE; /* syntax error: missing terminating ' character. */
}
if (*text == '\n' || *text == '\r')
{
Named_value::free_str(value);
return TRUE; /* syntax error: option value should be a single line. */
}
if (!escape_mode && *text == beginning_quote)
break;
if (escape_mode)
{
switch (*text)
{
case 'b': /* \b -- backspace */
if (v > *value)
--v;
break;
case 't': /* \t -- tab */
*v= '\t';
++v;
break;
case 'n': /* \n -- newline */
*v= '\n';
++v;
break;
case 'r': /* \r -- carriage return */
*v= '\r';
++v;
break;
case '\\': /* \\ -- back slash */
*v= '\\';
++v;
break;
case 's': /* \s -- space */
*v= ' ';
++v;
break;
default: /* Unknown escape sequence. Treat as error. */
Named_value::free_str(value);
return TRUE;
}
escape_mode= FALSE;
}
else
{
if (*text == '\\')
{
escape_mode= TRUE;
}
else
{
*v= *text;
++v;
}
}
++text;
}
*v= 0;
/* "2" below stands for beginning and ending quotes. */
*text_len= text - text_start_ptr + 2;
return FALSE;
}
void skip_spaces(const char **text)
{
while (**text && my_isspace(default_charset_info, **text))
++(*text);
}
Command *parse_command(Instance_map *map, const char *text)
{
uint word_len;
LEX_STRING instance_name;
Command *command= 0;
const char *saved_text= text;
Token tok1= shift_token(&text, &word_len);
switch (tok1) {
case TOK_START: // fallthrough
case TOK_STOP:
case TOK_CREATE:
case TOK_DROP:
if (shift_token(&text, &word_len) != TOK_INSTANCE)
goto syntax_error;
get_word(&text, &word_len);
if (word_len == 0)
goto syntax_error;
instance_name.str= (char *) text;
instance_name.length= word_len;
text+= word_len;
if (tok1 == TOK_CREATE)
{
Create_instance *cmd= new Create_instance(map, &instance_name);
if (!cmd)
return NULL; /* Report ER_OUT_OF_RESOURCES. */
if (cmd->init(&text))
{
delete cmd;
goto syntax_error;
}
command= cmd;
}
else
{
/* it should be the end of command */
get_word(&text, &word_len, NONSPACE);
if (word_len)
goto syntax_error;
}
switch (tok1) {
case TOK_START:
command= new Start_instance(map, &instance_name);
break;
case TOK_STOP:
command= new Stop_instance(map, &instance_name);
break;
case TOK_CREATE:
; /* command already initialized. */
break;
case TOK_DROP:
command= new Drop_instance(map, &instance_name);
break;
default: /* this is impossible, but nevertheless... */
DBUG_ASSERT(0);
}
break;
case TOK_FLUSH:
if (shift_token(&text, &word_len) != TOK_INSTANCES)
goto syntax_error;
get_word(&text, &word_len, NONSPACE);
if (word_len)
goto syntax_error;
command= new Flush_instances(map);
break;
case TOK_UNSET:
case TOK_SET:
{
Abstract_option_cmd *cmd;
if (tok1 == TOK_SET)
cmd= new Set_option(map);
else
cmd= new Unset_option(map);
if (!cmd)
return NULL; /* Report ER_OUT_OF_RESOURCES. */
if (cmd->init(&text))
{
delete cmd;
goto syntax_error;
}
command= cmd;
break;
}
case TOK_SHOW:
switch (shift_token(&text, &word_len)) {
case TOK_INSTANCES:
get_word(&text, &word_len, NONSPACE);
if (word_len)
goto syntax_error;
command= new Show_instances(map);
break;
case TOK_INSTANCE:
switch (Token tok2= shift_token(&text, &word_len)) {
case TOK_OPTIONS:
case TOK_STATUS:
if (get_text_id(&text, &instance_name))
goto syntax_error;
text+= instance_name.length;
/* check that this is the end of the command */
get_word(&text, &word_len, NONSPACE);
if (word_len)
goto syntax_error;
if (tok2 == TOK_STATUS)
command= new Show_instance_status(map, &instance_name);
else
command= new Show_instance_options(map, &instance_name);
break;
default:
goto syntax_error;
}
break;
default:
instance_name.str= (char *) text - word_len;
instance_name.length= word_len;
if (instance_name.length)
{
Log_type log_type;
long log_size;
LEX_STRING log_size_str;
long log_offset= 0;
LEX_STRING log_offset_str= { NULL, 0 };
switch (shift_token(&text, &word_len)) {
case TOK_LOG:
switch (Token tok3= shift_token(&text, &word_len)) {
case TOK_FILES:
get_word(&text, &word_len, NONSPACE);
/* check that this is the end of the command */
if (word_len)
goto syntax_error;
command= new Show_instance_log_files(map, &instance_name);
break;
case TOK_ERROR:
case TOK_GENERAL:
case TOK_SLOW:
/* define a log type */
switch (tok3) {
case TOK_ERROR:
log_type= IM_LOG_ERROR;
break;
case TOK_GENERAL:
log_type= IM_LOG_GENERAL;
break;
case TOK_SLOW:
log_type= IM_LOG_SLOW;
break;
default:
goto syntax_error;
}
/* get the size of the log we want to retrieve */
if (get_text_id(&text, &log_size_str))
goto syntax_error;
text+= log_size_str.length;
/* this parameter is required */
if (!log_size_str.length)
goto syntax_error;
/* the next token should be comma, or nothing */
get_word(&text, &word_len);
switch (*text) {
case ',':
text++; /* swallow the comma */
/* read the next word */
get_word(&text, &word_len);
if (!word_len)
goto syntax_error;
log_offset_str.str= (char *) text;
log_offset_str.length= word_len;
text+= word_len;
get_word(&text, &word_len, NONSPACE);
/* check that this is the end of the command */
if (word_len)
goto syntax_error;
break;
case '\0':
break; /* this is ok */
default:
goto syntax_error;
}
/* Parse size parameter. */
if (parse_long(&log_size_str, &log_size))
goto syntax_error;
if (log_size <= 0)
goto syntax_error;
/* Parse offset parameter (if specified). */
if (log_offset_str.length)
{
if (parse_long(&log_offset_str, &log_offset))
goto syntax_error;
if (log_offset <= 0)
goto syntax_error;
}
command= new Show_instance_log(map, &instance_name,
log_type, log_size, log_offset);
break;
default:
goto syntax_error;
}
break;
default:
goto syntax_error;
}
}
else
goto syntax_error;
break;
}
break;
default:
syntax_error:
command= new Syntax_error();
}
return command;
}
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