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-
- /*
- * BACKENDSOCK.C
- *
- * Backend socket communications routines
- */
-
- #include <errno.h>
- #include "tmp/c.h"
- #include "utils/log.h"
-
- RcsId("$Header: /private/postgres/src/bootstrap/RCS/socket.c,v 1.2 1991/11/06 04:27:09 mer Exp $");
-
- #define MAXQUERYSIZE 8192
-
- static int PortFd = -1; /* socket fd */
- static char InBuf[8192]; /* communications buffer, arbitrary size */
- static int InIdx; /* current index */
- static int InLen; /* current length
-
- static char OutBuf[8192]; /* output buffer, arbitrary size */
- static int OutIdx;
-
- extern int DebugMode; /* from backendsup.c */
-
- /*
- * function prototypes this file only
- */
- void SetPQSocket ARGS((int fd ));
- char GetPQChar ARGS((void ));
- int GetPQInt4 ARGS((void ));
- void GetPQStr ARGS((char *buf ));
- void LoadSocketBuf ARGS((void ));
-
- void
- SetPQSocket(fd)
- int fd;
- {
- PortFd = fd;
- InIdx = 0;
- InLen = 0;
- OutIdx= 0;
- }
-
- char
- GetPQChar()
- {
- if (InIdx == InLen)
- LoadSocketBuf();
- if (InIdx == InLen)
- return(0);
- return(InBuf[InIdx++]);
- }
-
- int
- GetPQInt4()
- {
- int i; /* index, count 4 bytes */
- int r = 0; /* result */
-
- for (i = 0; i < 4; ++i) {
- if (InIdx == InLen)
- LoadSocketBuf();
- if (InIdx == InLen)
- elog(FATAL, "GetPQInt4.read error");
- r = (r << 8) | InBuf[InIdx++];
- }
- return(r);
- }
-
- void
- GetPQStr(buf)
- char *buf;
- {
- int i;
-
- for (i = 0; i < MAXQUERYSIZE; ++i) {
- if (InIdx == InLen)
- LoadSocketBuf();
- if (InIdx == InLen)
- elog(FATAL, "GetPQStr.read error");
- buf[i] = InBuf[InIdx++];
- if (buf[i] == 0)
- break;
- }
- if (i == MAXQUERYSIZE)
- elog(FATAL, "GetPQStr.len error");
- }
-
- void
- LoadSocketBuf()
- {
- int n;
- extern int errno;
-
- for (;;) {
- n = read(PortFd, InBuf, sizeof(InBuf));
- if (n > 0)
- break;
- if (n < 0) {
- if (errno != EINTR)
- elog(FATAL, "LoadSocketBuf.read error %d", errno);
- }
- }
- InIdx = 0;
- InLen = n;
- }
-
-