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mariadb/sql/sql_load.cc
unknown fb4ee80cfd sql_load.cc: 
LOAD DATA INFILE now uses database character set instead of server character set. This is not excellent but at least allows to load for example cyrillic data into cyrillic database if server charset is latin1. In the future we should add a syntax to specify file charset or evern charset of each field.


sql/sql_load.cc:
  LOAD DATA INFILE now uses database character set instead of server character set. This is not excellent but at least allows to load for example cyrillic data into cyrillic database if server charset is latin1. In the future we should add a syntax to specify file charset or evern charset of each field.
2003-03-07 12:55:55 +04:00

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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult 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 */
/* Copy data from a textfile to table */
#include "mysql_priv.h"
#include <my_dir.h>
#include <m_ctype.h>
#include "sql_repl.h"
class READ_INFO {
File file;
byte *buffer, /* Buffer for read text */
*end_of_buff; /* Data in bufferts ends here */
uint buff_length, /* Length of buffert */
max_length; /* Max length of row */
char *field_term_ptr,*line_term_ptr,*line_start_ptr,*line_start_end;
uint field_term_length,line_term_length,enclosed_length;
int field_term_char,line_term_char,enclosed_char,escape_char;
int *stack,*stack_pos;
bool found_end_of_line,start_of_line,eof;
bool need_end_io_cache;
IO_CACHE cache;
NET *io_net;
public:
bool error,line_cuted,found_null,enclosed;
byte *row_start, /* Found row starts here */
*row_end; /* Found row ends here */
CHARSET_INFO *read_charset;
READ_INFO(File file,uint tot_length,CHARSET_INFO *cs,
String &field_term,String &line_start,String &line_term,
String &enclosed,int escape,bool get_it_from_net, bool is_fifo);
~READ_INFO();
int read_field();
int read_fixed_length(void);
int next_line(void);
char unescape(char chr);
int terminator(char *ptr,uint length);
bool find_start_of_fields();
/*
We need to force cache close before destructor is invoked to log
the last read block
*/
void end_io_cache()
{
::end_io_cache(&cache);
need_end_io_cache = 0;
}
/*
Either this method, or we need to make cache public
Arg must be set from mysql_load() since constructor does not see
either the table or THD value
*/
void set_io_cache_arg(void* arg) { cache.arg = arg; }
};
static int read_fixed_length(THD *thd,COPY_INFO &info,TABLE *table,
List<Item> &fields, READ_INFO &read_info);
static int read_sep_field(THD *thd,COPY_INFO &info,TABLE *table,
List<Item> &fields, READ_INFO &read_info,
String &enclosed);
#ifndef EMBEDDED_LIBRARY
int mysql_load(THD *thd,sql_exchange *ex,TABLE_LIST *table_list,
List<Item> &fields, enum enum_duplicates handle_duplicates,
bool read_file_from_client,thr_lock_type lock_type)
{
char name[FN_REFLEN];
File file;
TABLE *table;
int error;
String *field_term=ex->field_term,*escaped=ex->escaped,
*enclosed=ex->enclosed;
bool is_fifo=0;
LOAD_FILE_INFO lf_info;
char *db = table_list->db; // This is never null
/* If no current database, use database where table is located */
char *tdb= thd->db ? thd->db : db;
bool transactional_table, log_delayed;
DBUG_ENTER("mysql_load");
#ifdef EMBEDDED_LIBRARY
read_file_from_client = 0; //server is always in the same process
#endif
if (escaped->length() > 1 || enclosed->length() > 1)
{
my_message(ER_WRONG_FIELD_TERMINATORS,ER(ER_WRONG_FIELD_TERMINATORS),
MYF(0));
DBUG_RETURN(-1);
}
if (!(table = open_ltable(thd,table_list,lock_type)))
DBUG_RETURN(-1);
transactional_table= table->file->has_transactions();
log_delayed= (transactional_table || table->tmp_table);
if (!fields.elements)
{
Field **field;
for (field=table->field; *field ; field++)
fields.push_back(new Item_field(*field));
}
else
{ // Part field list
thd->dupp_field=0;
if (setup_tables(table_list) ||
setup_fields(thd, 0, table_list, fields, 1, 0, 0))
DBUG_RETURN(-1);
if (thd->dupp_field)
{
my_error(ER_FIELD_SPECIFIED_TWICE, MYF(0), thd->dupp_field->field_name);
DBUG_RETURN(-1);
}
}
uint tot_length=0;
bool use_blobs=0,use_timestamp=0;
List_iterator_fast<Item> it(fields);
Item_field *field;
while ((field=(Item_field*) it++))
{
if (field->field->flags & BLOB_FLAG)
{
use_blobs=1;
tot_length+=256; // Will be extended if needed
}
else
tot_length+=field->field->field_length;
if (!field_term->length() && !(field->field->flags & NOT_NULL_FLAG))
field->field->set_notnull();
if (field->field == table->timestamp_field)
use_timestamp=1;
}
if (use_blobs && !ex->line_term->length() && !field_term->length())
{
my_message(ER_BLOBS_AND_NO_TERMINATED,ER(ER_BLOBS_AND_NO_TERMINATED),
MYF(0));
DBUG_RETURN(-1);
}
/* We can't give an error in the middle when using LOCAL files */
if (read_file_from_client && handle_duplicates == DUP_ERROR)
handle_duplicates=DUP_IGNORE;
#ifndef EMBEDDED_LIBRARY
if (read_file_from_client)
{
(void)net_request_file(&thd->net,ex->file_name);
file = -1;
}
else
#endif
{
read_file_from_client=0;
#ifdef DONT_ALLOW_FULL_LOAD_DATA_PATHS
ex->file_name+=dirname_length(ex->file_name);
#endif
if (!dirname_length(ex->file_name) &&
strlen(ex->file_name)+strlen(mysql_data_home)+strlen(tdb)+3 <
FN_REFLEN)
{
(void) sprintf(name,"%s/%s/%s",mysql_data_home,tdb,ex->file_name);
unpack_filename(name,name); /* Convert to system format */
}
else
{
unpack_filename(name,ex->file_name);
#if !defined(__WIN__) && !defined(OS2)
MY_STAT stat_info;
if (!my_stat(name,&stat_info,MYF(MY_WME)))
DBUG_RETURN(-1);
// if we are not in slave thread, the file must be:
if (!thd->slave_thread &&
!((stat_info.st_mode & S_IROTH) == S_IROTH && // readable by others
#ifndef __EMX__
(stat_info.st_mode & S_IFLNK) != S_IFLNK && // and not a symlink
#endif
((stat_info.st_mode & S_IFREG) == S_IFREG ||
(stat_info.st_mode & S_IFIFO) == S_IFIFO)))
{
my_error(ER_TEXTFILE_NOT_READABLE,MYF(0),name);
DBUG_RETURN(-1);
}
if ((stat_info.st_mode & S_IFIFO) == S_IFIFO)
is_fifo = 1;
#endif
}
if ((file=my_open(name,O_RDONLY,MYF(MY_WME))) < 0)
DBUG_RETURN(-1);
}
COPY_INFO info;
bzero((char*) &info,sizeof(info));
info.handle_duplicates=handle_duplicates;
info.escape_char=escaped->length() ? (*escaped)[0] : INT_MAX;
READ_INFO read_info(file,tot_length,thd->db_charset,
*field_term,*ex->line_start, *ex->line_term, *enclosed,
info.escape_char, read_file_from_client, is_fifo);
if (read_info.error)
{
if (file >= 0)
my_close(file,MYF(0)); // no files in net reading
DBUG_RETURN(-1); // Can't allocate buffers
}
if (!opt_old_rpl_compat && mysql_bin_log.is_open())
{
lf_info.thd = thd;
lf_info.ex = ex;
lf_info.db = db;
lf_info.table_name = table_list->real_name;
lf_info.fields = &fields;
lf_info.handle_dup = handle_duplicates;
lf_info.wrote_create_file = 0;
lf_info.last_pos_in_file = HA_POS_ERROR;
lf_info.log_delayed= log_delayed;
read_info.set_io_cache_arg((void*) &lf_info);
}
restore_record(table,2);
thd->count_cuted_fields=1; /* calc cuted fields */
thd->cuted_fields=0L;
if (ex->line_term->length() && field_term->length())
{
// ex->skip_lines needs to be preserved for logging
uint skip_lines = ex->skip_lines;
while (skip_lines--)
{
if (read_info.next_line())
break;
}
}
if (!(error=test(read_info.error)))
{
uint save_time_stamp=table->time_stamp;
if (use_timestamp)
table->time_stamp=0;
table->next_number_field=table->found_next_number_field;
VOID(table->file->extra_opt(HA_EXTRA_WRITE_CACHE,
thd->variables.read_buff_size));
table->bulk_insert= 1;
if (handle_duplicates == DUP_IGNORE ||
handle_duplicates == DUP_REPLACE)
table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
table->file->deactivate_non_unique_index((ha_rows) 0);
table->copy_blobs=1;
if (!field_term->length() && !enclosed->length())
error=read_fixed_length(thd,info,table,fields,read_info);
else
error=read_sep_field(thd,info,table,fields,read_info,*enclosed);
if (table->file->extra(HA_EXTRA_NO_CACHE))
error=1; /* purecov: inspected */
if (table->file->activate_all_index(thd))
error=1; /* purecov: inspected */
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
table->time_stamp=save_time_stamp;
table->next_number_field=0;
}
if (file >= 0) my_close(file,MYF(0));
free_blobs(table); /* if pack_blob was used */
table->copy_blobs=0;
thd->count_cuted_fields=0; /* Don`t calc cuted fields */
if (error)
{
if (transactional_table)
ha_autocommit_or_rollback(thd,error);
if (!opt_old_rpl_compat && mysql_bin_log.is_open())
{
if (lf_info.wrote_create_file)
{
/*
Make sure last block (the one which caused the error) gets logged.
This is needed because otherwise after write of
(to the binlog, not to read_info (which is a cache))
Delete_file_log_event the bad block will remain in read_info.
At the end of mysql_load(), the destructor of read_info will call
end_io_cache() which will flush read_info, so we will finally have
this in the binlog:
Append_block # The last successfull block
Delete_file
Append_block # The failing block
which is nonsense.
*/
read_info.end_io_cache();
Delete_file_log_event d(thd, log_delayed);
mysql_bin_log.write(&d);
}
}
error= -1; // Error on read
goto err;
}
sprintf(name,ER(ER_LOAD_INFO),info.records,info.deleted,
info.records-info.copied,thd->cuted_fields);
send_ok(thd,info.copied+info.deleted,0L,name);
// on the slave thd->query is never initialized
if (!thd->slave_thread)
mysql_update_log.write(thd,thd->query,thd->query_length);
if (!log_delayed)
thd->options|=OPTION_STATUS_NO_TRANS_UPDATE;
if (mysql_bin_log.is_open())
{
if (opt_old_rpl_compat)
{
if (!read_file_from_client)
{
Load_log_event qinfo(thd, ex, db, table->table_name, fields,
handle_duplicates, log_delayed);
mysql_bin_log.write(&qinfo);
}
}
else
{
read_info.end_io_cache(); // make sure last block gets logged
if (lf_info.wrote_create_file)
{
Execute_load_log_event e(thd, log_delayed);
mysql_bin_log.write(&e);
}
}
}
if (transactional_table)
error=ha_autocommit_or_rollback(thd,error);
query_cache_invalidate3(thd, table_list, 0);
err:
if (thd->lock)
{
mysql_unlock_tables(thd, thd->lock);
thd->lock=0;
}
DBUG_RETURN(error);
}
#endif /* EMBEDDED_LIBRARY */
/****************************************************************************
** Read of rows of fixed size + optional garage + optonal newline
****************************************************************************/
static int
read_fixed_length(THD *thd,COPY_INFO &info,TABLE *table,List<Item> &fields,
READ_INFO &read_info)
{
List_iterator_fast<Item> it(fields);
Item_field *sql_field;
ulonglong id;
DBUG_ENTER("read_fixed_length");
id=0;
/* No fields can be null in this format. mark all fields as not null */
while ((sql_field= (Item_field*) it++))
sql_field->field->set_notnull();
while (!read_info.read_fixed_length())
{
if (thd->killed)
{
my_error(ER_SERVER_SHUTDOWN,MYF(0));
DBUG_RETURN(1);
}
it.rewind();
byte *pos=read_info.row_start;
#ifdef HAVE_purify
read_info.row_end[0]=0;
#endif
while ((sql_field= (Item_field*) it++))
{
Field *field=sql_field->field;
if (pos == read_info.row_end)
{
thd->cuted_fields++; /* Not enough fields */
field->reset();
}
else
{
uint length;
byte save_chr;
if ((length=(uint) (read_info.row_end-pos)) >
field->field_length)
length=field->field_length;
save_chr=pos[length]; pos[length]='\0'; // Safeguard aganst malloc
field->store((char*) pos,length,read_info.read_charset);
pos[length]=save_chr;
if ((pos+=length) > read_info.row_end)
pos= read_info.row_end; /* Fills rest with space */
}
}
if (pos != read_info.row_end)
thd->cuted_fields++; /* To long row */
if (write_record(table,&info))
DBUG_RETURN(1);
/*
If auto_increment values are used, save the first one
for LAST_INSERT_ID() and for the binary/update log.
We can't use insert_id() as we don't want to touch the
last_insert_id_used flag.
*/
if (!id && thd->insert_id_used)
id= thd->last_insert_id;
if (table->next_number_field)
table->next_number_field->reset(); // Clear for next record
if (read_info.next_line()) // Skip to next line
break;
if (read_info.line_cuted)
thd->cuted_fields++; /* To long row */
}
if (id && !read_info.error)
thd->insert_id(id); // For binary/update log
DBUG_RETURN(test(read_info.error));
}
static int
read_sep_field(THD *thd,COPY_INFO &info,TABLE *table,
List<Item> &fields, READ_INFO &read_info,
String &enclosed)
{
List_iterator_fast<Item> it(fields);
Item_field *sql_field;
uint enclosed_length;
ulonglong id;
DBUG_ENTER("read_sep_field");
enclosed_length=enclosed.length();
id=0;
for (;;it.rewind())
{
if (thd->killed)
{
my_error(ER_SERVER_SHUTDOWN,MYF(0));
DBUG_RETURN(1);
}
while ((sql_field=(Item_field*) it++))
{
uint length;
byte *pos;
if (read_info.read_field())
break;
pos=read_info.row_start;
length=(uint) (read_info.row_end-pos);
Field *field=sql_field->field;
if (!read_info.enclosed &&
(enclosed_length && length == 4 && !memcmp(pos,"NULL",4)) ||
(length == 1 && read_info.found_null))
{
field->reset();
field->set_null();
if (!field->maybe_null())
{
if (field->type() == FIELD_TYPE_TIMESTAMP)
((Field_timestamp*) field)->set_time();
else if (field != table->next_number_field)
thd->cuted_fields++;
}
continue;
}
field->set_notnull();
read_info.row_end[0]=0; // Safe to change end marker
field->store((char*) read_info.row_start,length,read_info.read_charset);
}
if (read_info.error)
break;
if (sql_field)
{ // Last record
if (sql_field == (Item_field*) fields.head())
break;
for (; sql_field ; sql_field=(Item_field*) it++)
{
sql_field->field->set_null();
sql_field->field->reset();
thd->cuted_fields++;
}
}
if (write_record(table,&info))
DBUG_RETURN(1);
/*
If auto_increment values are used, save the first one
for LAST_INSERT_ID() and for the binary/update log.
We can't use insert_id() as we don't want to touch the
last_insert_id_used flag.
*/
if (!id && thd->insert_id_used)
id= thd->last_insert_id;
if (table->next_number_field)
table->next_number_field->reset(); // Clear for next record
if (read_info.next_line()) // Skip to next line
break;
if (read_info.line_cuted)
thd->cuted_fields++; /* To long row */
}
if (id && !read_info.error)
thd->insert_id(id); // For binary/update log
DBUG_RETURN(test(read_info.error));
}
/* Unescape all escape characters, mark \N as null */
char
READ_INFO::unescape(char chr)
{
switch(chr) {
case 'n': return '\n';
case 't': return '\t';
case 'r': return '\r';
case 'b': return '\b';
case '0': return 0; // Ascii null
case 'Z': return '\032'; // Win32 end of file
case 'N': found_null=1;
/* fall through */
default: return chr;
}
}
/*
Read a line using buffering
If last line is empty (in line mode) then it isn't outputed
*/
READ_INFO::READ_INFO(File file_par, uint tot_length, CHARSET_INFO *cs,
String &field_term, String &line_start, String &line_term,
String &enclosed_par, int escape, bool get_it_from_net,
bool is_fifo)
:file(file_par),escape_char(escape)
{
read_charset= cs;
field_term_ptr=(char*) field_term.ptr();
field_term_length= field_term.length();
line_term_ptr=(char*) line_term.ptr();
line_term_length= line_term.length();
if (line_start.length() == 0)
{
line_start_ptr=0;
start_of_line= 0;
}
else
{
line_start_ptr=(char*) line_start.ptr();
line_start_end=line_start_ptr+line_start.length();
start_of_line= 1;
}
/* If field_terminator == line_terminator, don't use line_terminator */
if (field_term_length == line_term_length &&
!memcmp(field_term_ptr,line_term_ptr,field_term_length))
{
line_term_length=0;
line_term_ptr=(char*) "";
}
enclosed_char= (enclosed_length=enclosed_par.length()) ?
(uchar) enclosed_par[0] : INT_MAX;
field_term_char= field_term_length ? (uchar) field_term_ptr[0] : INT_MAX;
line_term_char= line_term_length ? (uchar) line_term_ptr[0] : INT_MAX;
error=eof=found_end_of_line=found_null=line_cuted=0;
buff_length=tot_length;
/* Set of a stack for unget if long terminators */
uint length=max(field_term_length,line_term_length)+1;
set_if_bigger(length,line_start.length());
stack=stack_pos=(int*) sql_alloc(sizeof(int)*length);
if (!(buffer=(byte*) my_malloc(buff_length+1,MYF(0))))
error=1; /* purecov: inspected */
else
{
end_of_buff=buffer+buff_length;
if (init_io_cache(&cache,(get_it_from_net) ? -1 : file, 0,
(get_it_from_net) ? READ_NET :
(is_fifo ? READ_FIFO : READ_CACHE),0L,1,
MYF(MY_WME)))
{
my_free((gptr) buffer,MYF(0)); /* purecov: inspected */
error=1;
}
else
{
/*
init_io_cache() will not initialize read_function member
if the cache is READ_NET. The reason is explained in
mysys/mf_iocache.c. So we work around the problem with a
manual assignment
*/
if (get_it_from_net)
cache.read_function = _my_b_net_read;
need_end_io_cache = 1;
#ifndef EMBEDDED_LIBRARY
if (!opt_old_rpl_compat && mysql_bin_log.is_open())
cache.pre_read = cache.pre_close =
(IO_CACHE_CALLBACK) log_loaded_block;
#endif
}
}
}
READ_INFO::~READ_INFO()
{
if (!error)
{
if (need_end_io_cache)
::end_io_cache(&cache);
my_free((gptr) buffer,MYF(0));
error=1;
}
}
#define GET (stack_pos != stack ? *--stack_pos : my_b_get(&cache))
#define PUSH(A) *(stack_pos++)=(A)
inline int READ_INFO::terminator(char *ptr,uint length)
{
int chr=0; // Keep gcc happy
uint i;
for (i=1 ; i < length ; i++)
{
if ((chr=GET) != *++ptr)
{
break;
}
}
if (i == length)
return 1;
PUSH(chr);
while (i-- > 1)
PUSH((uchar) *--ptr);
return 0;
}
int READ_INFO::read_field()
{
int chr,found_enclosed_char;
byte *to,*new_buffer;
found_null=0;
if (found_end_of_line)
return 1; // One have to call next_line
/* Skip until we find 'line_start' */
if (start_of_line)
{ // Skip until line_start
start_of_line=0;
if (find_start_of_fields())
return 1;
}
if ((chr=GET) == my_b_EOF)
{
found_end_of_line=eof=1;
return 1;
}
to=buffer;
if (chr == enclosed_char)
{
found_enclosed_char=enclosed_char;
*to++=(byte) chr; // If error
}
else
{
found_enclosed_char= INT_MAX;
PUSH(chr);
}
for (;;)
{
while ( to < end_of_buff)
{
chr = GET;
#ifdef USE_MB
if (use_mb(read_charset) &&
my_ismbhead(read_charset, chr) &&
to+my_mbcharlen(read_charset, chr) <= end_of_buff)
{
uchar* p = (uchar*)to;
*to++ = chr;
int ml = my_mbcharlen(read_charset, chr);
int i;
for (i=1; i<ml; i++) {
chr = GET;
if (chr == my_b_EOF)
goto found_eof;
*to++ = chr;
}
if (my_ismbchar(read_charset,
(const char *)p,
(const char *)to))
continue;
for (i=0; i<ml; i++)
PUSH((uchar) *--to);
chr = GET;
}
#endif
if (chr == my_b_EOF)
goto found_eof;
if (chr == escape_char)
{
if ((chr=GET) == my_b_EOF)
{
*to++= (byte) escape_char;
goto found_eof;
}
*to++ = (byte) unescape((char) chr);
continue;
}
#ifdef ALLOW_LINESEPARATOR_IN_STRINGS
if (chr == line_term_char)
#else
if (chr == line_term_char && found_enclosed_char == INT_MAX)
#endif
{
if (terminator(line_term_ptr,line_term_length))
{ // Maybe unexpected linefeed
enclosed=0;
found_end_of_line=1;
row_start=buffer;
row_end= to;
return 0;
}
}
if (chr == found_enclosed_char)
{
if ((chr=GET) == found_enclosed_char)
{ // Remove dupplicated
*to++ = (byte) chr;
continue;
}
// End of enclosed field if followed by field_term or line_term
if (chr == my_b_EOF ||
chr == line_term_char && terminator(line_term_ptr,
line_term_length))
{ // Maybe unexpected linefeed
enclosed=1;
found_end_of_line=1;
row_start=buffer+1;
row_end= to;
return 0;
}
if (chr == field_term_char &&
terminator(field_term_ptr,field_term_length))
{
enclosed=1;
row_start=buffer+1;
row_end= to;
return 0;
}
/* Copy the found '"' character */
PUSH(chr);
chr='"';
}
else if (chr == field_term_char && found_enclosed_char == INT_MAX)
{
if (terminator(field_term_ptr,field_term_length))
{
enclosed=0;
row_start=buffer;
row_end= to;
return 0;
}
}
*to++ = (byte) chr;
}
/*
** We come here if buffer is too small. Enlarge it and continue
*/
if (!(new_buffer=(byte*) my_realloc((char*) buffer,buff_length+1+IO_SIZE,
MYF(MY_WME))))
return (error=1);
to=new_buffer + (to-buffer);
buffer=new_buffer;
buff_length+=IO_SIZE;
end_of_buff=buffer+buff_length;
}
found_eof:
enclosed=0;
found_end_of_line=eof=1;
row_start=buffer;
row_end=to;
return 0;
}
/*
** One can't use fixed length with multi-byte charset **
*/
int READ_INFO::read_fixed_length()
{
int chr;
byte *to;
if (found_end_of_line)
return 1; // One have to call next_line
if (start_of_line)
{ // Skip until line_start
start_of_line=0;
if (find_start_of_fields())
return 1;
}
to=row_start=buffer;
while (to < end_of_buff)
{
if ((chr=GET) == my_b_EOF)
goto found_eof;
if (chr == escape_char)
{
if ((chr=GET) == my_b_EOF)
{
*to++= (byte) escape_char;
goto found_eof;
}
*to++ =(byte) unescape((char) chr);
continue;
}
if (chr == line_term_char)
{
if (terminator(line_term_ptr,line_term_length))
{ // Maybe unexpected linefeed
found_end_of_line=1;
row_end= to;
return 0;
}
}
*to++ = (byte) chr;
}
row_end=to; // Found full line
return 0;
found_eof:
found_end_of_line=eof=1;
row_start=buffer;
row_end=to;
return to == buffer ? 1 : 0;
}
int READ_INFO::next_line()
{
line_cuted=0;
start_of_line= line_start_ptr != 0;
if (found_end_of_line || eof)
{
found_end_of_line=0;
return eof;
}
found_end_of_line=0;
if (!line_term_length)
return 0; // No lines
for (;;)
{
int chr = GET;
#ifdef USE_MB
if (use_mb(read_charset) && my_ismbhead(read_charset, chr))
{
for (int i=1;
chr != my_b_EOF && i<my_mbcharlen(read_charset, chr);
i++)
chr = GET;
if (chr == escape_char)
continue;
}
#endif
if (chr == my_b_EOF)
{
eof=1;
return 1;
}
if (chr == escape_char)
{
line_cuted=1;
if (GET == my_b_EOF)
return 1;
continue;
}
if (chr == line_term_char && terminator(line_term_ptr,line_term_length))
return 0;
line_cuted=1;
}
}
bool READ_INFO::find_start_of_fields()
{
int chr;
try_again:
do
{
if ((chr=GET) == my_b_EOF)
{
found_end_of_line=eof=1;
return 1;
}
} while ((char) chr != line_start_ptr[0]);
for (char *ptr=line_start_ptr+1 ; ptr != line_start_end ; ptr++)
{
chr=GET; // Eof will be checked later
if ((char) chr != *ptr)
{ // Can't be line_start
PUSH(chr);
while (--ptr != line_start_ptr)
{ // Restart with next char
PUSH((uchar) *ptr);
}
goto try_again;
}
}
return 0;
}
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