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mysqldataset.cpp
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mysqldataset.cpp
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/*
* Copyright (C) 2005-2012 Team XBMC
* http://xbmc.org
*
* 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, 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 XBMC; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#include <iostream>
#include <string>
#include <set>
#include "utils/log.h"
#include "system.h" // for GetLastError()
#ifdef HAS_MYSQL
#include "mysqldataset.h"
#include "mysql/errmsg.h"
#ifdef _WIN32
#pragma comment(lib, "mysqlclient.lib")
#endif
#define MYSQL_OK 0
#define ER_BAD_DB_ERROR 1049
using namespace std;
namespace dbiplus {
//************* MysqlDatabase implementation ***************
MysqlDatabase::MysqlDatabase() {
active = false;
_in_transaction = false; // for transaction
error = "Unknown database error";//S_NO_CONNECTION;
host = "localhost";
port = "3306";
db = "mysql";
login = "root";
passwd = "null";
conn = NULL;
default_charset = "";
}
MysqlDatabase::~MysqlDatabase() {
disconnect();
}
Dataset* MysqlDatabase::CreateDataset() const {
return new MysqlDataset((MysqlDatabase*)this);
}
int MysqlDatabase::status(void) {
if (active == false) return DB_CONNECTION_NONE;
return DB_CONNECTION_OK;
}
int MysqlDatabase::setErr(int err_code, const char * qry) {
switch (err_code)
{
case MYSQL_OK:
error = "Successful result";
break;
case CR_COMMANDS_OUT_OF_SYNC:
error = "Commands were executed in an improper order";
break;
case CR_SERVER_GONE_ERROR:
error = "The MySQL server has gone away";
break;
case CR_SERVER_LOST:
error = "The connection to the server was lost during this query";
break;
case CR_UNKNOWN_ERROR:
error = "An unknown error occurred";
break;
case 1146: /* ER_NO_SUCH_TABLE */
error = "The table does not exist";
break;
default:
char err[256];
snprintf(err, 256, "Undefined MySQL error: Code (%d)", err_code);
error = err;
}
error += "\nQuery: ";
error += qry;
error += "\n";
return err_code;
}
const char *MysqlDatabase::getErrorMsg() {
return error.c_str();
}
int MysqlDatabase::connect(bool create_new) {
if (host.empty() || db.empty())
return DB_CONNECTION_NONE;
//CLog::Log(LOGDEBUG, "Connecting to mysql:%s:%s", host.c_str(), db.c_str());
try
{
disconnect();
if (conn == NULL)
conn = mysql_init(conn);
// establish connection with just user credentials
if (mysql_real_connect(conn, host.c_str(),login.c_str(),passwd.c_str(), NULL, atoi(port.c_str()),NULL,0) != NULL)
{
// disable mysql autocommit since we handle it
//mysql_autocommit(conn, false);
// enforce utf8 charset usage
default_charset = mysql_character_set_name(conn);
if(mysql_set_character_set(conn, "utf8")) // returns 0 on success
{
CLog::Log(LOGERROR, "Unable to set utf8 charset: %s [%d](%s)",
db.c_str(), mysql_errno(conn), mysql_error(conn));
}
// check existence
if (exists())
{
// nothing to see here
}
else if (create_new)
{
char sqlcmd[512];
int ret;
sprintf(sqlcmd, "CREATE DATABASE `%s`", db.c_str());
if ( (ret=query_with_reconnect(sqlcmd)) != MYSQL_OK )
{
throw DbErrors("Can't create new database: '%s' (%d)", db.c_str(), ret);
}
}
if (mysql_select_db(conn, db.c_str()) == 0)
{
active = true;
return DB_CONNECTION_OK;
}
}
// if we failed above, either credentials were incorrect or the database didn't exist
if (mysql_errno(conn) == ER_BAD_DB_ERROR && create_new)
{
if (create() == MYSQL_OK)
{
active = true;
return DB_CONNECTION_OK;
}
}
CLog::Log(LOGERROR, "Unable to open database: %s [%d](%s)",
db.c_str(), mysql_errno(conn), mysql_error(conn));
return DB_CONNECTION_NONE;
}
catch(...)
{
CLog::Log(LOGERROR, "Unable to open database: %s (%u)",
db.c_str(), GetLastError());
}
return DB_CONNECTION_NONE;
}
void MysqlDatabase::disconnect(void) {
if (conn != NULL)
{
mysql_close(conn);
conn = NULL;
}
active = false;
}
int MysqlDatabase::create() {
return connect(true);
}
int MysqlDatabase::drop() {
if (!active)
throw DbErrors("Can't drop database: no active connection...");
char sqlcmd[512];
int ret;
sprintf(sqlcmd,"DROP DATABASE `%s`", db.c_str());
if ( (ret=query_with_reconnect(sqlcmd)) != MYSQL_OK )
{
throw DbErrors("Can't drop database: '%s' (%d)", db.c_str(), ret);
}
disconnect();
return DB_COMMAND_OK;
}
int MysqlDatabase::copy(const char *backup_name) {
if ( !active || conn == NULL)
throw DbErrors("Can't copy database: no active connection...");
char sql[4096];
int ret;
// ensure we're connected to the db we are about to copy
if ( (ret=mysql_select_db(conn, db.c_str())) != MYSQL_OK )
throw DbErrors("Can't connect to source database: '%s'",db.c_str());
// grab a list of base tables only (no views)
sprintf(sql, "SHOW FULL TABLES WHERE Table_type = 'BASE TABLE'");
if ( (ret=query_with_reconnect(sql)) != MYSQL_OK )
throw DbErrors("Can't determine base tables for copy.");
// get list of all tables from old DB
MYSQL_RES* res = mysql_store_result(conn);
if (res)
{
if (mysql_num_rows(res) == 0)
{
mysql_free_result(res);
throw DbErrors("The source database was unexpectedly empty.");
}
// create the new database
sprintf(sql, "CREATE DATABASE `%s`", backup_name);
if ( (ret=query_with_reconnect(sql)) != MYSQL_OK )
{
mysql_free_result(res);
throw DbErrors("Can't create database for copy: '%s' (%d)", db.c_str(), ret);
}
MYSQL_ROW row;
// duplicate each table from old db to new db
while ( (row=mysql_fetch_row(res)) != NULL )
{
// copy the table definition
sprintf(sql, "CREATE TABLE %s.%s LIKE %s",
backup_name, row[0], row[0]);
if ( (ret=query_with_reconnect(sql)) != MYSQL_OK )
{
mysql_free_result(res);
throw DbErrors("Can't copy schema for table '%s'\nError: %s", db.c_str(), ret);
}
// copy the table data
sprintf(sql, "INSERT INTO %s.%s SELECT * FROM %s",
backup_name, row[0], row[0]);
if ( (ret=query_with_reconnect(sql)) != MYSQL_OK )
{
mysql_free_result(res);
throw DbErrors("Can't copy data for table '%s'\nError: %s", row[0], ret);
}
}
mysql_free_result(res);
// after table are recreated and repopulated we can recreate views
// grab a list of views and their definitions
sprintf(sql, "SELECT TABLE_NAME, VIEW_DEFINITION FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_SCHEMA = '%s'", db.c_str());
if ( (ret=query_with_reconnect(sql)) != MYSQL_OK )
throw DbErrors("Can't determine views to recreate.");
// get list of all views from old DB
MYSQL_RES* resViews = mysql_store_result(conn);
if (resViews)
{
while ( (row=mysql_fetch_row(resViews)) != NULL )
{
sprintf(sql, "CREATE VIEW %s.%s AS %s",
backup_name, row[0], row[1]);
if ( (ret=query_with_reconnect(sql)) != MYSQL_OK )
{
mysql_free_result(resViews);
throw DbErrors("Can't create view '%s'\nError: %s", db.c_str(), ret);
}
}
mysql_free_result(resViews);
}
}
return 1;
}
int MysqlDatabase::query_with_reconnect(const char* query) {
int attempts = 5;
int result;
// try to reconnect if server is gone
while ( ((result = mysql_real_query(conn, query, strlen(query))) != MYSQL_OK) &&
((result = mysql_errno(conn)) == CR_SERVER_GONE_ERROR || result == CR_SERVER_LOST) &&
(attempts-- > 0) )
{
CLog::Log(LOGINFO,"MYSQL server has gone. Will try %d more attempt(s) to reconnect.", attempts);
active = false;
connect(true);
}
return result;
}
long MysqlDatabase::nextid(const char* sname) {
CLog::Log(LOGDEBUG,"MysqlDatabase::nextid for %s",sname);
if (!active) return DB_UNEXPECTED_RESULT;
const char* seq_table = "sys_seq";
int id;/*,nrow,ncol;*/
MYSQL_RES* res;
char sqlcmd[512];
sprintf(sqlcmd,"select nextid from %s where seq_name = '%s'",seq_table, sname);
CLog::Log(LOGDEBUG,"MysqlDatabase::nextid will request");
if ((last_err = query_with_reconnect(sqlcmd)) != 0)
{
return DB_UNEXPECTED_RESULT;
}
res = mysql_store_result(conn);
if (mysql_num_rows(res) == 0)
{
id = 1;
sprintf(sqlcmd,"insert into %s (nextid,seq_name) values (%d,'%s')",seq_table,id,sname);
mysql_free_result(res);
if ((last_err = query_with_reconnect(sqlcmd)) != 0) return DB_UNEXPECTED_RESULT;
return id;
}
else
{
MYSQL_ROW row = mysql_fetch_row(res);
//id = (int)row[0];
id = -1;
unsigned long *lengths;
lengths = mysql_fetch_lengths(res);
CLog::Log(LOGINFO,"Next id is [%.*s] ", (int) lengths[0], row[0]);
sprintf(sqlcmd,"update %s set nextid=%d where seq_name = '%s'",seq_table,id,sname);
mysql_free_result(res);
if ((last_err = query_with_reconnect(sqlcmd) != 0)) return DB_UNEXPECTED_RESULT;
return id;
}
return DB_UNEXPECTED_RESULT;
}
// methods for transactions
// ---------------------------------------------
void MysqlDatabase::start_transaction() {
if (active)
{
CLog::Log(LOGDEBUG,"Mysql Start transaction");
_in_transaction = true;
}
}
void MysqlDatabase::commit_transaction() {
if (active)
{
mysql_commit(conn);
CLog::Log(LOGDEBUG,"Mysql commit transaction");
_in_transaction = false;
}
}
void MysqlDatabase::rollback_transaction() {
if (active)
{
mysql_rollback(conn);
CLog::Log(LOGDEBUG,"Mysql rollback transaction");
_in_transaction = false;
}
}
bool MysqlDatabase::exists(void) {
bool ret = false;
if ( conn == NULL || mysql_ping(conn) )
{
CLog::Log(LOGERROR, "Not connected to database, test of existence is not possible.");
return ret;
}
MYSQL_RES* result = mysql_list_dbs(conn, db.c_str());
if (result == NULL)
{
CLog::Log(LOGERROR,"Database is not present, does the user has CREATE DATABASE permission");
return false;
}
ret = (mysql_num_rows(result) > 0);
mysql_free_result(result);
// Check if there is some tables ( to permit user with no create database rights
if (ret)
{
result = mysql_list_tables(conn, NULL);
if (result != NULL)
ret = (mysql_num_rows(result) > 0);
mysql_free_result(result);
}
return ret;
}
// methods for formatting
// ---------------------------------------------
string MysqlDatabase::vprepare(const char *format, va_list args)
{
string strFormat = format;
string strResult = "";
char *p;
size_t pos;
// %q is the sqlite format string for %s.
// Any bad character, like "'", will be replaced with a proper one
pos = 0;
while ( (pos = strFormat.find("%s", pos)) != string::npos )
strFormat.replace(pos++, 2, "%q");
p = mysql_vmprintf(strFormat.c_str(), args);
if ( p )
{
strResult = p;
free(p);
// RAND() is the mysql form of RANDOM()
pos = 0;
while ( (pos = strResult.find("RANDOM()", pos)) != string::npos )
{
strResult.replace(pos++, 8, "RAND()");
pos += 6;
}
}
return strResult;
}
/* vsprintf() functionality is based on sqlite3.c functions */
/*
** Conversion types fall into various categories as defined by the
** following enumeration.
*/
#define etRADIX 1 /* Integer types. %d, %x, %o, and so forth */
#define etFLOAT 2 /* Floating point. %f */
#define etEXP 3 /* Exponentional notation. %e and %E */
#define etGENERIC 4 /* Floating or exponential, depending on exponent. %g */
#define etSIZE 5 /* Return number of characters processed so far. %n */
#define etSTRING 6 /* Strings. %s */
#define etDYNSTRING 7 /* Dynamically allocated strings. %z */
#define etPERCENT 8 /* Percent symbol. %% */
#define etCHARX 9 /* Characters. %c */
/* The rest are extensions, not normally found in printf() */
#define etSQLESCAPE 10 /* Strings with '\'' doubled. Stings with '\\' escaped. %q */
#define etSQLESCAPE2 11 /* Strings with '\'' doubled and enclosed in '',
NULL pointers replaced by SQL NULL. %Q */
#define etPOINTER 14 /* The %p conversion */
#define etSQLESCAPE3 15 /* %w -> Strings with '\"' doubled */
#define etINVALID 0 /* Any unrecognized conversion type */
#define ARRAY_SIZE(X) ((int)(sizeof(X)/sizeof(X[0])))
/*
** An "etByte" is an 8-bit unsigned value.
*/
typedef unsigned char etByte;
/*
** Each builtin conversion character (ex: the 'd' in "%d") is described
** by an instance of the following structure
*/
typedef struct et_info { /* Information about each format field */
char fmttype; /* The format field code letter */
etByte base; /* The base for radix conversion */
etByte flags; /* One or more of FLAG_ constants below */
etByte type; /* Conversion paradigm */
etByte charset; /* Offset into aDigits[] of the digits string */
etByte prefix; /* Offset into aPrefix[] of the prefix string */
} et_info;
/*
** An objected used to accumulate the text of a string where we
** do not necessarily know how big the string will be in the end.
*/
struct StrAccum {
char *zBase; /* A base allocation. Not from malloc. */
char *zText; /* The string collected so far */
int nChar; /* Length of the string so far */
int nAlloc; /* Amount of space allocated in zText */
int mxAlloc; /* Maximum allowed string length */
bool mallocFailed; /* Becomes true if any memory allocation fails */
bool tooBig; /* Becomes true if string size exceeds limits */
};
/*
** Allowed values for et_info.flags
*/
#define FLAG_SIGNED 1 /* True if the value to convert is signed */
#define FLAG_INTERN 2 /* True if for internal use only */
#define FLAG_STRING 4 /* Allow infinity precision */
/*
** The following table is searched linearly, so it is good to put the
** most frequently used conversion types first.
*/
static const char aDigits[] = "0123456789ABCDEF0123456789abcdef";
static const char aPrefix[] = "-x0\000X0";
static const et_info fmtinfo[] = {
{ 'd', 10, 1, etRADIX, 0, 0 },
{ 's', 0, 4, etSTRING, 0, 0 },
{ 'g', 0, 1, etGENERIC, 30, 0 },
{ 'z', 0, 4, etDYNSTRING, 0, 0 },
{ 'q', 0, 4, etSQLESCAPE, 0, 0 },
{ 'Q', 0, 4, etSQLESCAPE2, 0, 0 },
{ 'w', 0, 4, etSQLESCAPE3, 0, 0 },
{ 'c', 0, 0, etCHARX, 0, 0 },
{ 'o', 8, 0, etRADIX, 0, 2 },
{ 'u', 10, 0, etRADIX, 0, 0 },
{ 'x', 16, 0, etRADIX, 16, 1 },
{ 'X', 16, 0, etRADIX, 0, 4 },
{ 'f', 0, 1, etFLOAT, 0, 0 },
{ 'e', 0, 1, etEXP, 30, 0 },
{ 'E', 0, 1, etEXP, 14, 0 },
{ 'G', 0, 1, etGENERIC, 14, 0 },
{ 'i', 10, 1, etRADIX, 0, 0 },
{ 'n', 0, 0, etSIZE, 0, 0 },
{ '%', 0, 0, etPERCENT, 0, 0 },
{ 'p', 16, 0, etPOINTER, 0, 1 },
};
/*
** "*val" is a double such that 0.1 <= *val < 10.0
** Return the ascii code for the leading digit of *val, then
** multiply "*val" by 10.0 to renormalize.
**
** Example:
** input: *val = 3.14159
** output: *val = 1.4159 function return = '3'
**
** The counter *cnt is incremented each time. After counter exceeds
** 16 (the number of significant digits in a 64-bit float) '0' is
** always returned.
*/
char MysqlDatabase::et_getdigit(double *val, int *cnt) {
int digit;
double d;
if( (*cnt)++ >= 16 ) return '0';
digit = (int)*val;
d = digit;
digit += '0';
*val = (*val - d)*10.0;
return (char)digit;
}
/*
** Append N space characters to the given string buffer.
*/
void MysqlDatabase::appendSpace(StrAccum *pAccum, int N) {
static const char zSpaces[] = " ";
while( N>=(int)sizeof(zSpaces)-1 ) {
mysqlStrAccumAppend(pAccum, zSpaces, sizeof(zSpaces)-1);
N -= sizeof(zSpaces)-1;
}
if( N>0 ){
mysqlStrAccumAppend(pAccum, zSpaces, N);
}
}
#ifndef MYSQL_PRINT_BUF_SIZE
# define MYSQL_PRINT_BUF_SIZE 350
#endif
#define etBUFSIZE MYSQL_PRINT_BUF_SIZE /* Size of the output buffer */
/*
** The maximum length of a TEXT or BLOB in bytes. This also
** limits the size of a row in a table or index.
**
** The hard limit is the ability of a 32-bit signed integer
** to count the size: 2^31-1 or 2147483647.
*/
#ifndef MYSQL_MAX_LENGTH
# define MYSQL_MAX_LENGTH 1000000000
#endif
/*
** The root program. All variations call this core.
**
** INPUTS:
** func This is a pointer to a function taking three arguments
** 1. A pointer to anything. Same as the "arg" parameter.
** 2. A pointer to the list of characters to be output
** (Note, this list is NOT null terminated.)
** 3. An integer number of characters to be output.
** (Note: This number might be zero.)
**
** arg This is the pointer to anything which will be passed as the
** first argument to "func". Use it for whatever you like.
**
** fmt This is the format string, as in the usual print.
**
** ap This is a pointer to a list of arguments. Same as in
** vfprint.
**
** OUTPUTS:
** The return value is the total number of characters sent to
** the function "func". Returns -1 on a error.
**
** Note that the order in which automatic variables are declared below
** seems to make a big difference in determining how fast this beast
** will run.
*/
void MysqlDatabase::mysqlVXPrintf(
StrAccum *pAccum, /* Accumulate results here */
int useExtended, /* Allow extended %-conversions */
const char *fmt, /* Format string */
va_list ap /* arguments */
){
int c; /* Next character in the format string */
char *bufpt; /* Pointer to the conversion buffer */
int precision; /* Precision of the current field */
int length; /* Length of the field */
int idx; /* A general purpose loop counter */
int width; /* Width of the current field */
etByte flag_leftjustify; /* True if "-" flag is present */
etByte flag_plussign; /* True if "+" flag is present */
etByte flag_blanksign; /* True if " " flag is present */
etByte flag_alternateform; /* True if "#" flag is present */
etByte flag_altform2; /* True if "!" flag is present */
etByte flag_zeropad; /* True if field width constant starts with zero */
etByte flag_long; /* True if "l" flag is present */
etByte flag_longlong; /* True if the "ll" flag is present */
etByte done; /* Loop termination flag */
uint64_t longvalue; /* Value for integer types */
double realvalue; /* Value for real types */
const et_info *infop; /* Pointer to the appropriate info structure */
char buf[etBUFSIZE]; /* Conversion buffer */
char prefix; /* Prefix character. "+" or "-" or " " or '\0'. */
etByte xtype = 0; /* Conversion paradigm */
char *zExtra; /* Extra memory used for etTCLESCAPE conversions */
int exp, e2; /* exponent of real numbers */
double rounder; /* Used for rounding floating point values */
etByte flag_dp; /* True if decimal point should be shown */
etByte flag_rtz; /* True if trailing zeros should be removed */
etByte flag_exp; /* True to force display of the exponent */
int nsd; /* Number of significant digits returned */
length = 0;
bufpt = 0;
for(; (c=(*fmt))!=0; ++fmt){
if( c!='%' ){
int amt;
bufpt = (char *)fmt;
amt = 1;
while( (c=(*++fmt))!='%' && c!=0 ) amt++;
mysqlStrAccumAppend(pAccum, bufpt, amt);
if( c==0 ) break;
}
if( (c=(*++fmt))==0 ){
mysqlStrAccumAppend(pAccum, "%", 1);
break;
}
/* Find out what flags are present */
flag_leftjustify = flag_plussign = flag_blanksign = flag_alternateform = flag_altform2 = flag_zeropad = 0;
done = 0;
do
{
switch( c )
{
case '-': flag_leftjustify = 1; break;
case '+': flag_plussign = 1; break;
case ' ': flag_blanksign = 1; break;
case '#': flag_alternateform = 1; break;
case '!': flag_altform2 = 1; break;
case '0': flag_zeropad = 1; break;
default: done = 1; break;
}
} while( !done && (c=(*++fmt))!=0 );
/* Get the field width */
width = 0;
if( c=='*' ){
width = va_arg(ap,int);
if( width<0 ){
flag_leftjustify = 1;
width = -width;
}
c = *++fmt;
}else{
while( c>='0' && c<='9' ){
width = width*10 + c - '0';
c = *++fmt;
}
}
if( width > etBUFSIZE-10 ){
width = etBUFSIZE-10;
}
/* Get the precision */
if( c=='.' ){
precision = 0;
c = *++fmt;
if( c=='*' ){
precision = va_arg(ap,int);
if( precision<0 ) precision = -precision;
c = *++fmt;
}else{
while( c>='0' && c<='9' ){
precision = precision*10 + c - '0';
c = *++fmt;
}
}
}else{
precision = -1;
}
/* Get the conversion type modifier */
if( c=='l' ){
flag_long = 1;
c = *++fmt;
if( c=='l' ){
flag_longlong = 1;
c = *++fmt;
}else{
flag_longlong = 0;
}
}else{
flag_long = flag_longlong = 0;
}
/* Fetch the info entry for the field */
infop = &fmtinfo[0];
xtype = etINVALID;
for(idx=0; idx<ARRAY_SIZE(fmtinfo); idx++){
if( c==fmtinfo[idx].fmttype ){
infop = &fmtinfo[idx];
if( useExtended || (infop->flags & FLAG_INTERN)==0 ){
xtype = infop->type;
}else{
return;
}
break;
}
}
zExtra = 0;
/* Limit the precision to prevent overflowing buf[] during conversion */
if( precision>etBUFSIZE-40 && (infop->flags & FLAG_STRING)==0 ){
precision = etBUFSIZE-40;
}
/*
** At this point, variables are initialized as follows:
**
** flag_alternateform TRUE if a '#' is present.
** flag_altform2 TRUE if a '!' is present.
** flag_plussign TRUE if a '+' is present.
** flag_leftjustify TRUE if a '-' is present or if the
** field width was negative.
** flag_zeropad TRUE if the width began with 0.
** flag_long TRUE if the letter 'l' (ell) prefixed
** the conversion character.
** flag_longlong TRUE if the letter 'll' (ell ell) prefixed
** the conversion character.
** flag_blanksign TRUE if a ' ' is present.
** width The specified field width. This is
** always non-negative. Zero is the default.
** precision The specified precision. The default
** is -1.
** xtype The class of the conversion.
** infop Pointer to the appropriate info struct.
*/
switch( xtype ){
case etPOINTER:
flag_longlong = sizeof(char*)==sizeof(int64_t);
flag_long = sizeof(char*)==sizeof(long int);
/* Fall through into the next case */
case etRADIX:
if( infop->flags & FLAG_SIGNED ){
int64_t v;
if( flag_longlong ){
v = va_arg(ap,int64_t);
}else if( flag_long ){
v = va_arg(ap,long int);
}else{
v = va_arg(ap,int);
}
if( v<0 ){
longvalue = -v;
prefix = '-';
}else{
longvalue = v;
if( flag_plussign ) prefix = '+';
else if( flag_blanksign ) prefix = ' ';
else prefix = 0;
}
}else{
if( flag_longlong ){
longvalue = va_arg(ap,uint64_t);
}else if( flag_long ){
longvalue = va_arg(ap,unsigned long int);
}else{
longvalue = va_arg(ap,unsigned int);
}
prefix = 0;
}
if( longvalue==0 ) flag_alternateform = 0;
if( flag_zeropad && precision<width-(prefix!=0) ){
precision = width-(prefix!=0);
}
bufpt = &buf[etBUFSIZE-1];
{
register const char *cset; /* Use registers for speed */
register int base;
cset = &aDigits[infop->charset];
base = infop->base;
do{ /* Convert to ascii */
*(--bufpt) = cset[longvalue%base];
longvalue = longvalue/base;
}while( longvalue>0 );
}
length = (int)(&buf[etBUFSIZE-1]-bufpt);
for(idx=precision-length; idx>0; idx--){
*(--bufpt) = '0'; /* Zero pad */
}
if( prefix ) *(--bufpt) = prefix; /* Add sign */
if( flag_alternateform && infop->prefix ){ /* Add "0" or "0x" */
const char *pre;
char x;
pre = &aPrefix[infop->prefix];
for(; (x=(*pre))!=0; pre++) *(--bufpt) = x;
}
length = (int)(&buf[etBUFSIZE-1]-bufpt);
bufpt[length] = 0;
break;
case etFLOAT:
case etEXP:
case etGENERIC:
realvalue = va_arg(ap,double);
if( precision<0 ) precision = 6; /* Set default precision */
if( precision>etBUFSIZE/2-10 ) precision = etBUFSIZE/2-10;
if( realvalue<0.0 ){
realvalue = -realvalue;
prefix = '-';
}else{
if( flag_plussign ) prefix = '+';
else if( flag_blanksign ) prefix = ' ';
else prefix = 0;
}
if( xtype==etGENERIC && precision>0 ) precision--;
/* It makes more sense to use 0.5 */
for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1){}
if( xtype==etFLOAT ) realvalue += rounder;
/* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
exp = 0;
#if 0
if( mysqlIsNaN((double)realvalue) ){
bufpt = "NaN";
length = 3;
break;
}
#endif
if( realvalue>0.0 ){
while( realvalue>=1e32 && exp<=350 ){ realvalue *= 1e-32; exp+=32; }
while( realvalue>=1e8 && exp<=350 ){ realvalue *= 1e-8; exp+=8; }
while( realvalue>=10.0 && exp<=350 ){ realvalue *= 0.1; exp++; }
while( realvalue<1e-8 ){ realvalue *= 1e8; exp-=8; }
while( realvalue<1.0 ){ realvalue *= 10.0; exp--; }
if( exp>350 ){
if( prefix=='-' ){
bufpt = (char *)"-Inf";
}else if( prefix=='+' ){
bufpt = (char *)"+Inf";
}else{
bufpt = (char *)"Inf";
}
length = strlen(bufpt);
break;
}
}
bufpt = buf;
/*
** If the field type is etGENERIC, then convert to either etEXP
** or etFLOAT, as appropriate.
*/
flag_exp = xtype==etEXP;
if( xtype!=etFLOAT ){
realvalue += rounder;
if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; }
}
if( xtype==etGENERIC ){
flag_rtz = !flag_alternateform;
if( exp<-4 || exp>precision ){
xtype = etEXP;
}else{
precision = precision - exp;
xtype = etFLOAT;
}
}else{
flag_rtz = 0;
}
if( xtype==etEXP ){
e2 = 0;
}else{
e2 = exp;
}
nsd = 0;
flag_dp = (precision>0 ?1:0) | flag_alternateform | flag_altform2;
/* The sign in front of the number */
if( prefix ){
*(bufpt++) = prefix;
}
/* Digits prior to the decimal point */
if( e2<0 ){
*(bufpt++) = '0';
}else{
for(; e2>=0; e2--){
*(bufpt++) = et_getdigit(&realvalue,&nsd);
}
}
/* The decimal point */
if( flag_dp ){
*(bufpt++) = '.';
}
/* "0" digits after the decimal point but before the first
** significant digit of the number */
for(e2++; e2<0; precision--, e2++){
//ASSERT( precision>0 );
*(bufpt++) = '0';
}
/* Significant digits after the decimal point */
while( (precision--)>0 ){
*(bufpt++) = et_getdigit(&realvalue,&nsd);
}
/* Remove trailing zeros and the "." if no digits follow the "." */
if( flag_rtz && flag_dp ){
while( bufpt[-1]=='0' ) *(--bufpt) = 0;
//ASSERT( bufpt>buf );
if( bufpt[-1]=='.' ){
if( flag_altform2 ){
*(bufpt++) = '0';
}else{
*(--bufpt) = 0;
}
}
}
/* Add the "eNNN" suffix */
if( flag_exp || xtype==etEXP ){
*(bufpt++) = aDigits[infop->charset];
if( exp<0 ){
*(bufpt++) = '-'; exp = -exp;
}else{
*(bufpt++) = '+';
}
if( exp>=100 ){
*(bufpt++) = (char)((exp/100)+'0'); /* 100's digit */
exp %= 100;
}
*(bufpt++) = (char)(exp/10+'0'); /* 10's digit */
*(bufpt++) = (char)(exp%10+'0'); /* 1's digit */
}
*bufpt = 0;
/* The converted number is in buf[] and zero terminated. Output it.
** Note that the number is in the usual order, not reversed as with
** integer conversions. */
length = (int)(bufpt-buf);
bufpt = buf;
/* Special case: Add leading zeros if the flag_zeropad flag is
** set and we are not left justified */
if( flag_zeropad && !flag_leftjustify && length < width){
int i;
int nPad = width - length;
for(i=width; i>=nPad; i--){
bufpt[i] = bufpt[i-nPad];
}
i = prefix!=0;
while( nPad-- ) bufpt[i++] = '0';
length = width;
}
break;
case etSIZE:
*(va_arg(ap,int*)) = pAccum->nChar;
length = width = 0;