Avoid using sprintf() for a simple octal conversion in PQescapeByteaInternal.

Improves performance, per suggestion from Rudolf Leitgeb (bug #4414).
The backend did this right already, but not libpq.

diff --git a/src/interfaces/libpq/fe-exec.c b/src/interfaces/libpq/fe-exec.c
index e7941dffe024f16e5ed554018506e2c7ca1b86c7..2f02d91db9e215e1da5c4b3cebcb4981e1a9a2bb 100644 (file)
--- a/src/interfaces/libpq/fe-exec.c
+++ b/src/interfaces/libpq/fe-exec.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/interfaces/libpq/fe-exec.c,v 1.194 2008/01/01 19:46:00 momjian Exp $
+ *   $PostgreSQL: pgsql/src/interfaces/libpq/fe-exec.c,v 1.194.2.1 2008/09/10 17:01:17 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -2760,10 +2760,14 @@ PQescapeByteaInternal(PGconn *conn,
    {
        if (*vp < 0x20 || *vp > 0x7e)
        {
+           int     val = *vp;
+
            if (!std_strings)
                *rp++ = '\\';
-           (void) sprintf((char *) rp, "\\%03o", *vp);
-           rp += 4;
+           *rp++ = '\\';
+           *rp++ = (val >> 6) + '0';
+           *rp++ = ((val >> 3) & 07) + '0';
+           *rp++ = (val & 07) + '0';
        }
        else if (*vp == '\'')
        {