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Use dollar-quoting for function bodies, unless disabled with

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--disable-dollar-quoting.

Andrew Dunstan
This commit is contained in:
Tom Lane
2004-03-23 22:06:08 +00:00
parent 48b2802eee
commit f862c42009
4 changed files with 121 additions and 28 deletions
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61
src/bin/pg_dump/dumputils.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/bin/pg_dump/dumputils.c,v 1.11 2004/01/07 00:44:21 tgl Exp $
* $PostgreSQL: pgsql/src/bin/pg_dump/dumputils.c,v 1.12 2004/03/23 22:06:08 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -142,6 +142,65 @@ appendStringLiteral(PQExpBuffer buf, const char *str, bool escapeAll)
}
/*
* Convert a string value to a dollar quoted literal and append it to
* the given buffer. If the dqprefix parameter is not NULL then the
* dollar quote delimiter will begin with that (after the opening $).
*
* No escaping is done at all on str, in compliance with the rules
* for parsing dollar quoted strings.
*/
void
appendStringLiteralDQ(PQExpBuffer buf, const char *str, const char *dqprefix)
{
static const char suffixes[] = "_XXXXXXX";
int nextchar = 0;
PQExpBuffer delimBuf = createPQExpBuffer();
/* start with $ + dqprefix if not NULL */
appendPQExpBufferChar(delimBuf, '$');
if (dqprefix)
appendPQExpBuffer(delimBuf, dqprefix);
/*
* Make sure we choose a delimiter which (without the trailing $)
* is not present in the string being quoted. We don't check with the
* trailing $ because a string ending in $foo must not be quoted with
* $foo$.
*/
while (strstr(str, delimBuf->data) != NULL)
{
appendPQExpBufferChar(delimBuf, suffixes[nextchar++]);
nextchar %= sizeof(suffixes)-1;
}
/* add trailing $ */
appendPQExpBufferChar(delimBuf, '$');
/* quote it and we are all done */
appendPQExpBufferStr(buf, delimBuf->data);
appendPQExpBufferStr(buf, str);
appendPQExpBufferStr(buf, delimBuf->data);
destroyPQExpBuffer(delimBuf);
}
/*
* Use dollar quoting if the string to be quoted contains ' or \,
* otherwise use standard quoting.
*/
void
appendStringLiteralDQOpt(PQExpBuffer buf, const char *str,
bool escapeAll, const char *dqprefix)
{
if (strchr(str, '\'') == NULL && strchr(str, '\\') == NULL)
appendStringLiteral(buf,str,escapeAll);
else
appendStringLiteralDQ(buf,str,dqprefix);
}
/*
* Convert backend's version string into a number.
*/