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Fix copy to make it more robust against unexpected character 

sequences. This is done by disabling multi-byte awareness when it's
not necessary. This is kind of a workaround, not a perfect solution.
However, there is no ideal way to parse broken multi-byte character
sequences. So I guess this is the best way what we could do right
now...
This commit is contained in:
Tatsuo Ishii 2001-01-06 03:33:17 +00:00
parent 4451ed3dfe
commit a6944611e2
1 changed files with 39 additions and 25 deletions
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64
src/backend/commands/copy.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/copy.c,v 1.127 2001/01/03 20:04:10 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/copy.c,v 1.128 2001/01/06 03:33:17 ishii Exp $
*
*-------------------------------------------------------------------------
*/
@ -74,8 +74,8 @@ static bool fe_eof;
static StringInfoData attribute_buf;
#ifdef MULTIBYTE
static int encoding;
static int client_encoding;
static int server_encoding;
#endif
@ -297,7 +297,8 @@ DoCopy(char *relname, bool binary, bool oids, bool from, bool pipe,
*/
initStringInfo(&attribute_buf);
#ifdef MULTIBYTE
encoding = pg_get_client_encoding();
client_encoding = pg_get_client_encoding();
server_encoding = GetDatabaseEncoding();
#endif
if (from)
@ -1114,29 +1115,35 @@ CopyReadAttribute(FILE *fp, bool *isnull, char *delim, int *newline, char *null_
}
appendStringInfoCharMacro(&attribute_buf, c);
#ifdef MULTIBYTE
/* get additional bytes of the char, if any */
s[0] = c;
mblen = pg_encoding_mblen(encoding, s);
for (j = 1; j < mblen; j++)
if (client_encoding != server_encoding)
{
c = CopyGetChar(fp);
if (c == EOF)
goto endOfFile;
appendStringInfoCharMacro(&attribute_buf, c);
/* get additional bytes of the char, if any */
s[0] = c;
mblen = pg_encoding_mblen(client_encoding, s);
for (j = 1; j < mblen; j++)
{
c = CopyGetChar(fp);
if (c == EOF)
goto endOfFile;
appendStringInfoCharMacro(&attribute_buf, c);
}
}
#endif
}
#ifdef MULTIBYTE
cvt = (char *) pg_client_to_server((unsigned char *) attribute_buf.data,
attribute_buf.len);
if (cvt != attribute_buf.data)
if (client_encoding != server_encoding)
{
/* transfer converted data back to attribute_buf */
attribute_buf.len = 0;
attribute_buf.data[0] = '\0';
appendBinaryStringInfo(&attribute_buf, cvt, strlen(cvt));
pfree(cvt);
cvt = (char *) pg_client_to_server((unsigned char *) attribute_buf.data,
attribute_buf.len);
if (cvt != attribute_buf.data)
{
/* transfer converted data back to attribute_buf */
attribute_buf.len = 0;
attribute_buf.data[0] = '\0';
appendBinaryStringInfo(&attribute_buf, cvt, strlen(cvt));
pfree(cvt);
}
}
#endif
@ -1163,15 +1170,22 @@ CopyAttributeOut(FILE *fp, char *server_string, char *delim)
#endif
#ifdef MULTIBYTE
string = (char *) pg_server_to_client((unsigned char *) server_string,
strlen(server_string));
string_start = string;
if (client_encoding != server_encoding)
{
string = (char *) pg_server_to_client((unsigned char *) server_string,
strlen(server_string));
string_start = string;
}
else
{
string = server_string;
}
#else
string = server_string;
#endif
#ifdef MULTIBYTE
for (; (mblen = pg_encoding_mblen(encoding, string)) &&
for (; (mblen = (server_encoding == client_encoding? 1 : pg_encoding_mblen(client_encoding, string))) &&
((c = *string) != '\0'); string += mblen)
#else
for (; (c = *string) != '\0'; string++)
@ -1188,7 +1202,7 @@ CopyAttributeOut(FILE *fp, char *server_string, char *delim)
}
#ifdef MULTIBYTE
if (string_start != server_string)
if (client_encoding != server_encoding)
pfree(string_start); /* pfree pg_server_to_client result */
#endif
}