robust, since it's about to get used much more heavily.
*
* Copyright (c) 1994-5, Regents of the University of California
*
- * $Id: explain.c,v 1.45 1999/08/16 23:47:23 tgl Exp $
+ * $Id: explain.c,v 1.46 1999/08/31 01:28:28 tgl Exp $
*
*/
static void printLongNotice(const char *header, const char *message);
static void ExplainOneQuery(Query *query, bool verbose, CommandDest dest);
+/* Convert a null string pointer into "<>" */
+#define stringStringInfo(s) (((s) == NULL) ? "<>" : (s))
+
/*
* ExplainQuery -
*
* Copyright (c) 1994, Regents of the University of California
*
- * $Id: stringinfo.c,v 1.20 1999/07/17 20:16:59 momjian Exp $
+ * $Id: stringinfo.c,v 1.21 1999/08/31 01:28:25 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "lib/stringinfo.h"
-#ifdef NOT_USED
/*
* makeStringInfo
*
return res;
}
-#endif
/*
* initStringInfo
{
int size = 256; /* initial default buffer size */
- str->data = palloc(size);
+ str->data = (char *) palloc(size);
if (str->data == NULL)
elog(ERROR,
"initStringInfo: Out of memory (%d bytes requested)", size);
enlargeStringInfo(StringInfo str, int needed)
{
int newlen;
- char *newdata;
needed += str->len + 1; /* total space required now */
if (needed <= str->maxlen)
while (needed > newlen)
newlen = 2 * newlen;
- newdata = palloc(newlen);
- if (newdata == NULL)
+ str->data = (char *) repalloc(str->data, newlen);
+ if (str->data == NULL)
elog(ERROR,
- "enlargeStringInfo: Out of memory (%d bytes requested)", newlen);
+ "enlargeStringInfo: Out of memory (%d bytes requested)", newlen);
- /* OK, transfer data into new buffer, and release old buffer */
- memcpy(newdata, str->data, str->len + 1);
- pfree(str->data);
- str->data = newdata;
str->maxlen = newlen;
}
* 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 current implementation has a 1K limit on the amount of text
- * generated in a single call (not on the total string length).
*/
void
appendStringInfo(StringInfo str, const char *fmt,...)
{
va_list args;
- char buffer[1024];
- int buflen;
+ int avail,
+ nprinted;
Assert(str != NULL);
- va_start(args, fmt);
- buflen = vsnprintf(buffer, sizeof(buffer), fmt, args);
- va_end(args);
-
- /* Make more room if needed */
- enlargeStringInfo(str, buflen);
-
- /* OK, append the data, including the trailing null */
- memcpy(str->data + str->len, buffer, buflen + 1);
- str->len += buflen;
+ for (;;)
+ {
+ /*----------
+ * Try to format the given string into the available space;
+ * but if there's hardly any space, don't bother trying,
+ * just fall through to enlarge the buffer first.
+ *----------
+ */
+ avail = str->maxlen - str->len - 1;
+ if (avail > 16)
+ {
+ va_start(args, fmt);
+ nprinted = vsnprintf(str->data + str->len, avail,
+ fmt, args);
+ va_end(args);
+ if (nprinted < avail-1)
+ {
+ /* Success. Note nprinted does not include trailing null. */
+ str->len += nprinted;
+ break;
+ }
+ }
+ /* Double the buffer size and try again. */
+ enlargeStringInfo(str, str->maxlen);
+ }
}
/*------------------------
*
* Copyright (c) 1994, Regents of the University of California
*
- * $Id: outfuncs.c,v 1.94 1999/08/21 03:48:58 tgl Exp $
+ * $Id: outfuncs.c,v 1.95 1999/08/31 01:28:32 tgl Exp $
*
* NOTES
* Every (plan) node in POSTGRES has an associated "out" routine which
static void _outDatum(StringInfo str, Datum value, Oid type);
static void _outNode(StringInfo str, void *obj);
+/* Convert a null string pointer into "<>" */
+#define stringStringInfo(s) (((s) == NULL) ? "<>" : (s))
+
+
/*
* _outIntList -
* converts a List of integers
* causing nast effects.
**************************************************************/
-/*static char _id[] = "$Id: snprintf.c,v 1.25 1999/07/17 20:17:28 momjian Exp $";*/
+/*static char _id[] = "$Id: snprintf.c,v 1.26 1999/08/31 01:28:37 tgl Exp $";*/
static char *end;
static int SnprfOverflow;
int
vsnprintf(char *str, size_t count, const char *fmt, va_list args)
{
- str[0] = 0;
+ str[0] = '\0';
end = str + count - 1;
SnprfOverflow = 0;
dopr(str, fmt, args);
if (count > 0)
- end[0] = 0;
+ end[0] = '\0';
if (SnprfOverflow)
- elog(NOTICE, "vsnprintf overflow, len = %d, str = %s",
+ elog(DEBUG, "vsnprintf overflow, len = %d, str = %s",
count, str);
return strlen(str);
}
{
case 0:
dostr("**end of format**", 0);
+ *output = '\0';
return;
case '-':
ljust = 1;
break;
}
}
- *output = 0;
+ *output = '\0';
}
static void
*
* Copyright (c) 1994, Regents of the University of California
*
- * $Id: stringinfo.h,v 1.13 1999/05/26 12:56:27 momjian Exp $
+ * $Id: stringinfo.h,v 1.14 1999/08/31 01:28:21 tgl Exp $
*
*-------------------------------------------------------------------------
*/
*-------------------------
*/
-#ifdef NOT_USED
/*------------------------
* makeStringInfo
* Create an empty 'StringInfoData' & return a pointer to it.
*/
extern StringInfo makeStringInfo(void);
-#endif
/*------------------------
* initStringInfo
* 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 current implementation has a 1K limit on the amount of text
- * generated in a single call (not on the total string length).
*/
extern void appendStringInfo(StringInfo str, const char *fmt,...);
extern void appendBinaryStringInfo(StringInfo str,
const char *data, int datalen);
-/*------------------------
- * stringStringInfo
- * Return the string itself or "<>" if it is NULL.
- * This is just a convenience macro used by many callers of appendStringInfo.
- */
-#define stringStringInfo(s) (((s) == NULL) ? "<>" : (s))
-
#endif /* STRINGINFO_H */
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