Merge mysql.com:/home/bkroot/mysql-5.0 (f940cfad) · Commits · Software / OSDI20 Artifacts / mariadb

include/my_sys.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -866,6 +866,9 @@ extern void add_compiled_collation(CHARSET_INFO *cs);
		extern ulong escape_string_for_mysql(CHARSET_INFO *charset_info,
		char *to, ulong to_length,
		const char *from, ulong length);
		extern ulong escape_quotes_for_mysql(CHARSET_INFO *charset_info,
		char *to, ulong to_length,
		const char *from, ulong length);

		extern void thd_increment_bytes_sent(ulong length);
		extern void thd_increment_bytes_received(ulong length);

include/mysql_com.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -148,6 +148,7 @@ enum enum_server_command
		*/
		#define SERVER_STATUS_LAST_ROW_SENT 128
		#define SERVER_STATUS_DB_DROPPED 256 /* A database was dropped */
		#define SERVER_STATUS_NO_BACKSLASH_ESCAPES 512

		#define MYSQL_ERRMSG_SIZE 512
		#define NET_READ_TIMEOUT 30 /* Timeout on read */

libmysql/libmysql.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -1615,9 +1615,16 @@ mysql_escape_string(char to,const char from,ulong length)
		ulong STDCALL
		mysql_real_escape_string(MYSQL mysql, char to,const char *from,
		ulong length)
		{
		if (mysql->server_status & SERVER_STATUS_NO_BACKSLASH_ESCAPES)
		{
		return escape_quotes_for_mysql(mysql->charset, to, 0, from, length);
		}
		else
		{
		return escape_string_for_mysql(mysql->charset, to, 0, from, length);
		}
		}


		char * STDCALL

mysys/charset.c

+108 −8

Original line number	Diff line number	Diff line
		@@ -561,11 +561,30 @@ CHARSET_INFO get_charset_by_csname(const char cs_name,
		DBUG_RETURN(cs);
		}


		/*
		Escape string with backslashes (\)

		SYNOPSIS
		escape_string_for_mysql()
		charset_info Charset of the strings
		to Buffer for escaped string
		to_length Length of destination buffer, or 0
		from The string to escape
		length The length of the string to escape

		DESCRIPTION
		This escapes the contents of a string by adding backslashes before special
		characters, and turning others into specific escape sequences, such as
		turning newlines into \n and null bytes into \0.

		NOTE
		to keep old C API, to_length may be 0 to mean "big enough"
		RETURN
		the length of the escaped string or ~0 if it did not fit.
		To maintain compatibility with the old C API, to_length may be 0 to mean
		"big enough"

		RETURN VALUES
		~0 The escaped string did not fit in the to buffer
		>=0 The length of the escaped string
		*/
		ulong escape_string_for_mysql(CHARSET_INFO *charset_info,
		char *to, ulong to_length,
		@@ -573,7 +592,7 @@ ulong escape_string_for_mysql(CHARSET_INFO *charset_info,
		{
		const char *to_start= to;
		const char end, to_end=to_start + (to_length ? to_length-1 : 2*length);
		my_bool overflow=0;
		my_bool overflow= FALSE;
		#ifdef USE_MB
		my_bool use_mb_flag= use_mb(charset_info);
		#endif
		@@ -586,7 +605,7 @@ ulong escape_string_for_mysql(CHARSET_INFO *charset_info,
		{
		if (to + tmp_length > to_end)
		{
		overflow=1;
		overflow= TRUE;
		break;
		}
		while (tmp_length--)
		@@ -636,7 +655,7 @@ ulong escape_string_for_mysql(CHARSET_INFO *charset_info,
		{
		if (to + 2 > to_end)
		{
		overflow=1;
		overflow= TRUE;
		break;
		}
		*to++= '\\';
		@@ -646,7 +665,7 @@ ulong escape_string_for_mysql(CHARSET_INFO *charset_info,
		{
		if (to + 1 > to_end)
		{
		overflow=1;
		overflow= TRUE;
		break;
		}
		to++= from;
		@@ -656,3 +675,84 @@ ulong escape_string_for_mysql(CHARSET_INFO *charset_info,
		return overflow ? (ulong)~0 : (ulong) (to - to_start);
		}


		/*
		Escape apostrophes by doubling them up

		SYNOPSIS
		escape_quotes_for_mysql()
		charset_info Charset of the strings
		to Buffer for escaped string
		to_length Length of destination buffer, or 0
		from The string to escape
		length The length of the string to escape

		DESCRIPTION
		This escapes the contents of a string by doubling up any apostrophes that
		it contains. This is used when the NO_BACKSLASH_ESCAPES SQL_MODE is in
		effect on the server.

		NOTE
		To be consistent with escape_string_for_mysql(), to_length may be 0 to
		mean "big enough"

		RETURN VALUES
		~0 The escaped string did not fit in the to buffer
		>=0 The length of the escaped string
		*/
		ulong escape_quotes_for_mysql(CHARSET_INFO *charset_info,
		char *to, ulong to_length,
		const char *from, ulong length)
		{
		const char *to_start= to;
		const char end, to_end=to_start + (to_length ? to_length-1 : 2*length);
		my_bool overflow= FALSE;
		#ifdef USE_MB
		my_bool use_mb_flag= use_mb(charset_info);
		#endif
		for (end= from + length; from < end; from++)
		{
		char escape= 0;
		#ifdef USE_MB
		int tmp_length;
		if (use_mb_flag && (tmp_length= my_ismbchar(charset_info, from, end)))
		{
		if (to + tmp_length > to_end)
		{
		overflow= TRUE;
		break;
		}
		while (tmp_length--)
		to++= from++;
		from--;
		continue;
		}
		/*
		We don't have the same issue here with a non-multi-byte character being
		turned into a multi-byte character by the addition of an escaping
		character, because we are only escaping the ' character with itself.
		*/
		#endif
		if (*from == '\'')
		{
		if (to + 2 > to_end)
		{
		overflow= TRUE;
		break;
		}
		*to++= '\'';
		*to++= '\'';
		}
		else
		{
		if (to + 1 > to_end)
		{
		overflow= TRUE;
		break;
		}
		to++= from;
		}
		}
		*to= 0;
		return overflow ? (ulong)~0 : (ulong) (to - to_start);
		}

sql/set_var.cc

+9 −0

Original line number	Diff line number	Diff line
		@@ -3238,7 +3238,16 @@ void fix_sql_mode_var(THD *thd, enum_var_type type)
		global_system_variables.sql_mode=
		fix_sql_mode(global_system_variables.sql_mode);
		else
		{
		thd->variables.sql_mode= fix_sql_mode(thd->variables.sql_mode);
		/*
		Update thd->server_status
		*/
		if (thd->variables.sql_mode & MODE_NO_BACKSLASH_ESCAPES)
		thd->server_status\|= SERVER_STATUS_NO_BACKSLASH_ESCAPES;
		else
		thd->server_status&= ~SERVER_STATUS_NO_BACKSLASH_ESCAPES;
		}
		}

		/* Map database specific bits to function bits */