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Modify libpq's pqexpbuffer to eliminate length restriction on how much

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data can be formatted per call.  This requires relying on vsnprintf().
On machines that haven't got vsnprintf, link in the version from
backend/port/.
This commit is contained in:
Tom Lane
2000-01-17 02:59:46 +00:00
parent 6759f4388f
commit 2fd4e7762c
3 changed files with 92 additions and 55 deletions
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24
src/interfaces/libpq/pqexpbuffer.h
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@ -9,11 +9,15 @@
*
* This module is essentially the same as the backend's StringInfo data type,
* but it is intended for use in frontend libpq and client applications.
* Thus, it does not rely on palloc(), elog(), nor vsnprintf().
* Thus, it does not rely on palloc() nor elog().
*
* It does rely on vsnprintf(); if configure finds that libc doesn't provide
* a usable vsnprintf(), then a copy of our own implementation of it will
* be linked into libpq.
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: pqexpbuffer.h,v 1.1 1999/08/31 01:37:37 tgl Exp $
* $Id: pqexpbuffer.h,v 1.2 2000/01/17 02:59:46 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -116,14 +120,6 @@ extern int enlargePQExpBuffer(PQExpBuffer str, int needed);
* and insert it into str. More space is allocated to str if necessary.
* This is a convenience routine that does the same thing as
* resetPQExpBuffer() followed by appendPQExpBuffer().
*
* CAUTION: the frontend version of this routine WILL FAIL if the result of
* the sprintf formatting operation exceeds 1KB of data (but the size of the
* pre-existing string in the buffer doesn't matter). We could make it
* support larger strings, but that requires vsnprintf() which is not
* universally available. Currently there is no need for long strings to be
* formatted in the frontend. We could support it, if necessary, by
* conditionally including a vsnprintf emulation.
*/
extern void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...);
@ -133,14 +129,6 @@ extern void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...);
* and append it to whatever is already in str. More space is allocated
* to str if necessary. This is sort of like a combination of sprintf and
* strcat.
*
* CAUTION: the frontend version of this routine WILL FAIL if the result of
* the sprintf formatting operation exceeds 1KB of data (but the size of the
* pre-existing string in the buffer doesn't matter). We could make it
* support larger strings, but that requires vsnprintf() which is not
* universally available. Currently there is no need for long strings to be
* formatted in the frontend. We could support it, if necessary, by
* conditionally including a vsnprintf emulation.
*/
extern void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...);