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epics-base/src/libCom/errSymLib.c
1994-07-13 02:29:43 +00:00

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/* $Id$
* errSymLib.c
* Author: Marty Kraimer
* Date: 6-1-90
*
* Experimental Physics and Industrial Control System (EPICS)
*
* Copyright 1991, the Regents of the University of California,
* and the University of Chicago Board of Governors.
*
* This software was produced under U.S. Government contracts:
* (W-7405-ENG-36) at the Los Alamos National Laboratory,
* and (W-31-109-ENG-38) at Argonne National Laboratory.
*
* Initial development by:
* The Controls and Automation Group (AT-8)
* Ground Test Accelerator
* Accelerator Technology Division
* Los Alamos National Laboratory
*
* Co-developed with
* The Controls and Computing Group
* Accelerator Systems Division
* Advanced Photon Source
* Argonne National Laboratory
*
* Modification Log: errSymLib.c
* -----------------
* .01 mm-dd-yy rcz See below for Creation/Merge
**** Merged Modification Logs:
* Modification Log: errMessage.c
* -----------------
* .01 10-08-91 mrk Allow logMsg or printF
* .02 03-10-93 joh expanded errMessage() to accept the
* same format string and variable
* length arguments as printf()
* and renamed it errPrintf()
* .03 03-11-93 joh added __FILE__ and __LINE__ to errPrintf()
* created macro errMessage() that calls
* errPrintf with __FILE__ and __LINE__
* as arguments
* errMessage.c - Handle error messages
***************************************************************************
* This must ultimately be replaced by a facility that allows remote
* nodes access to the error messages. A message handling communication
* task should be written that allows multiple remote nodes to request
* notification of all error messages.
* For now lets just print messages and last errno via logMsg or printf
***************************************************************************
* Modification Log: errPrint.c
* -----------------
* .01 10-08-91 mrk Allow logMsg or printf
* .02 04-29-93 joh extra arg for errPrint()
* .03 04-29-93 joh errPrint() became errPrintStatus()
* .04 05-06-93 joh errPrintStatus() get var args
* for vprintf()
* .05 05-02-94 joh errToLogMsg now defaults to TRUE
*
* Modification Log: errSymLib.c
* -----------------
* .01 09-04-93 rcz Merged errMessage.c, errPrint.c, errSymFind.c
* rcz into one file (errSymLib.c) and changed method
* rcz of errSymTable lookup.
*/
#include <ellLib.h>
#include <dbDefs.h>
#include <errMdef.h>
#include "errSymTbl.h"
#include <stdio.h>
#ifdef vxWorks
#include <vxWorks.h>
#include <taskLib.h>
#include <logLib.h>
#include <types.h>
#include <symLib.h>
extern SYMTAB_ID statSymTbl;
#else
#include <string.h>
extern int errno;
extern int sys_nerr;
extern char *sys_errlist[];
#endif
#ifdef vxWorks
#define MYERRNO (errnoGet()&0xffff)
#else
#define MYERRNO errno
#endif
typedef struct errnumnode {
ELLNODE node;
long errNum;
struct errnumnode *hashnode;
char *message;
long pad;
} ERRNUMNODE;
#define NHASH 256
static ELLLIST errnumlist;
static ERRNUMNODE **hashtable;
static int initialized = FALSE;
extern ERRSYMTAB_ID errSymTbl;
#ifdef vxWorks
int errToLogMsg = TRUE;
#endif
/*Declare storage for errVerbose( defined in errMdef.h)*/
int errVerbose=0;
/****************************************************************
* ERRSYMBLD
*
* Create the normal ell LIST of sorted error messages nodes
* Followed by linked hash lists - that link together those
* ell nodes that have a common hash number.
*
***************************************************************/
int errSymBld()
{
ERRSYMBOL *errArray = errSymTbl->symbols;
ELLLIST *perrnumlist = &errnumlist;
ERRNUMNODE *perrNumNode = NULL;
ERRNUMNODE *pNextNode = NULL;
ERRNUMNODE **phashnode = NULL;
int i;
int modnum;
unsigned short hashInd;
if(initialized) return(0);
hashtable = (ERRNUMNODE**)dbCalloc(NHASH, sizeof(ERRNUMNODE*));
for (i = 0; i < errSymTbl->nsymbols; i++, errArray++) {
modnum = errArray->errNum >> 16;
if (modnum < 501) {
printf("errSymBld: ERROR - Module number in errSymTbl < 501\n");
return (-1);
}
if ((errSymbolAdd(errArray->errNum, errArray->name)) <0 ) {
printf("errSymBld: ERROR - errSymbolAdd() failed \n");
return (-1);
}
}
perrNumNode = (ERRNUMNODE *) ellFirst(perrnumlist);
while (perrNumNode) {
/* hash each perrNumNode->errNum */
hashInd = errhash(perrNumNode->errNum);
phashnode = (ERRNUMNODE**)&hashtable[hashInd];
pNextNode = (ERRNUMNODE*) *phashnode;
/* search for last node (NULL) of hashnode linked list */
while (pNextNode) {
phashnode = &pNextNode->hashnode;
pNextNode = *phashnode;
}
*phashnode = perrNumNode;
perrNumNode = (ERRNUMNODE *) ellNext((ELLNODE *) perrNumNode);
}
initialized = TRUE;
return(0);
}
/****************************************************************
* HASH
* returns the hash index of errNum
****************************************************************/
#ifdef __STDC__
static
unsigned short errhash(long errNum)
#else
static
unsigned short errhash(errNum)
long errNum;
#endif /* __STDC__ */
{
unsigned short modnum;
unsigned short errnum;
modnum = errNum >> 16;
errnum = errNum & 0xffff;
return((unsigned short)(((modnum - 500) * 20) + errnum) % NHASH);
}
/****************************************************************
* ERRMESSAGE - now a macro to call errPrintf
* ERRPRINTF - print an error symbol message
***************************************************************/
#ifdef __STDC__
void errPrintf(long status, char *pFileName, int lineno, char *pformat, ...)
#else
void errPrintf(va_alist)
va_dcl
#endif
{
va_list pvar;
static char *pReformat;
static int reformatSize;
static char pAdd[] = {'\n', '\0'};
#ifndef __STDC__
long status;
char *pformat;
char *pFileName;
int lineno;
#endif
#ifdef vxWorks
int id;
static int saveid = -1;
char *pname;
#endif
#ifdef __STDC__
va_start(pvar, pformat);
#else
va_start(pvar);
status = va_arg(pvar, long);
pFileName = va_arg(pvar, char *);
lineno = va_arg(pvar, int);
pformat = va_arg(pvar, char *);
#endif
#ifdef vxWorks
if(!errToLogMsg) {
id = taskIdSelf();
if (saveid != id) {
saveid = id;
pname = taskName(id);
printf("taskid=%x taskname=%s ", id, pname);
}
}
#endif
if(pFileName && errVerbose){
#ifdef vxWorks
if(errToLogMsg) {
logMsg("filename=\"%s\" line number=%d\n", pFileName, lineno,
NULL, NULL, NULL, NULL);
}
else{
printf("filename=\"%s\" line number=%d\n", pFileName, lineno);
}
#else
printf("filename=\"%s\" line number=%d\n", pFileName, lineno);
#endif
}
if (pformat != NULL) {
int size;
size = strlen(pformat)+NELEMENTS(pAdd);
if(reformatSize < size){
/*
* use a reasonable size string
*/
size = max(0xff, size);
if(pReformat){
free(pReformat);
}
pReformat = (char *) malloc(size);
if(pReformat){
reformatSize = size;
}
else{
#ifdef vxWorks
logMsg("%s: calloc error\n", __FILE__,
NULL, NULL, NULL, NULL, NULL);
#else
printf("%s: calloc error\n", __FILE__);
#endif
return;
}
}
strcpy(pReformat, pformat);
strcat(pReformat, pAdd);
}
verrPrintStatus(status, pReformat, pvar);
return;
}
/****************************************************************
* ERRPRINTSTATUS
***************************************************************/
#ifdef __STDC__
int errPrintStatus(long status, char *pFormat, ...)
#else
int errPrintStatus(va_alist)
va_dcl
#endif
{
va_list pvar;
#ifndef __STDC__
long status;
char *pFormat;
#endif
#ifdef __STDC__
va_start(pvar, pFormat);
#else
va_start(pvar);
status = va_arg(pvar, long);
pFormat = va_arg(pvar, char *);
#endif
return verrPrintStatus(status, pFormat, pvar);
}
/****************************************************************
* VERRPRINTSTATUS
***************************************************************/
#ifdef __STDC__
int verrPrintStatus(long status, char *pFormatString, va_list pvar)
#else
int verrPrintStatus(status, pFormatString, pvar)
long status;
char *pFormatString;
va_list pvar;
#endif
{
static char ctxToLarge[] = "** Context String Overflow **";
char name[256];
int rtnval;
int namelen;
int formatlen;
unsigned short modnum;
unsigned short errnum;
name[0] = '\0';
if(status==0) status = MYERRNO;
if(status >= -1){
rtnval = 0;
}
else {
rtnval = status;
}
if(status>0) {
rtnval = errSymFind(status,name);
modnum = status >> 16;
errnum = status & 0xffff;
if(rtnval) {
sprintf(name,
"Error status (module %hu, number %hu) not in symbol table",
modnum, errnum);
}
}
if(pFormatString){
namelen = strlen(name);
formatlen = strlen(pFormatString);
strcat(name," ");
if(sizeof(name)-namelen-1 > formatlen){
strcat(name, pFormatString);
}
else if(sizeof(name)-namelen-1 > sizeof(ctxToLarge)){
strcat(name, ctxToLarge);
}
else{
fprintf(stderr,ctxToLarge);
}
}
#ifdef vxWorks
if(errToLogMsg){
int i;
int logMsgArgs[6];
for(i=0; i< NELEMENTS(logMsgArgs); i++){
logMsgArgs[i] = va_arg(pvar, int);
}
logMsg(
name,
logMsgArgs[0],
logMsgArgs[1],
logMsgArgs[2],
logMsgArgs[3],
logMsgArgs[4],
logMsgArgs[5]);
}
else{
vprintf(name, pvar);
}
#else
vprintf(name, pvar);
#endif
return rtnval;
}
/****************************************************************
* ERRSYMBOLADD
* adds symbols to the master errnumlist as compiled from errSymTbl.c
***************************************************************/
#ifdef __STDC__
int errSymbolAdd (long errNum,char *name)
#else
int errSymbolAdd (errNum,name)
long errNum;
char *name;
#endif /* __STDC__ */
{
ELLLIST *perrnumlist = &errnumlist;
ERRNUMNODE *pNew;
pNew = (ERRNUMNODE*)dbCalloc(1, sizeof(ERRNUMNODE));
pNew->errNum = errNum;
pNew->message = name;
ellAdd(perrnumlist,(ELLNODE*)pNew);
return(0);
}
/****************************************************************
* UNIXSYMFIND
***************************************************************/
#ifndef vxWorks
#ifdef __STDC__
int UnixSymFind(long status, char *pname, long *pvalue)
#else
int UnixSymFind(status, pname, pvalue)
long status;
char *pname;
long *pvalue;
#endif /* __STDC__ */
{
if (status >= sys_nerr || status < 1) {
*pvalue = -1;
return;
}
strcpy(pname, sys_errlist[status]);
*pvalue = status;
return;
}
#endif
/****************************************************************
* MODSYMFIND
***************************************************************/
#ifdef __STDC__
int ModSymFind(long status, char *pname, long *pvalue)
#else
int ModSymFind(status, pname, pvalue)
long status;
char *pname;
long *pvalue;
#endif /* __STDC__ */
{
unsigned short modNum;
unsigned short hashInd;
ERRNUMNODE *pNextNode;
ERRNUMNODE **phashnode = NULL;
modNum = (status >> 16);
if (modNum < 501) {
*pvalue = -1;
return;
}
hashInd = errhash(status);
phashnode = (ERRNUMNODE**)&hashtable[hashInd];
pNextNode = *phashnode;
while (pNextNode) {
if (pNextNode->errNum == status) {
strcpy(pname, pNextNode->message);
*pvalue = status;
return;
}
phashnode = &pNextNode->hashnode;
pNextNode = *phashnode;
}
*pname = 0;
*pvalue = -1;
return ;
}
/****************************************************************
* ERRSYMFIND
***************************************************************/
#ifdef __STDC__
int errSymFind(long status, char *name)
#else
/* errSymFind - Locate error symbol */
int errSymFind(status, name)
long status;
char *name;
#endif /* __STDC__ */
{
long value;
#ifdef vxWorks
unsigned char type;
#endif
unsigned short modnum;
if (!initialized) {
errSymBld();
}
modnum = (status >> 16);
if (modnum <= 500)
#ifdef vxWorks
symFindByValue((SYMTAB_ID)statSymTbl, status, name,(int*) &value, (SYM_TYPE*)&type);
#else
UnixSymFind(status, name, &value);
#endif
else
ModSymFind(status, name, &value);
if (value != status)
return (-1);
else
return (0);
}
/****************************************************************
* errSymDump
***************************************************************/
#ifdef __STDC__
void errSymDump()
#else
void errSymDump()
#endif /* __STDC__ */
{
ERRNUMNODE **phashnode = NULL;
ERRNUMNODE *pNextNode;
int i;
int modnum;
int errnum;
int msgcount;
int firstTime;
if (!initialized)
errSymBld();
msgcount = 0;
printf("errSymDump: number of hash slots=%d\n", NHASH);
for ( i=0; i < NHASH; i++) {
phashnode = &hashtable[i];
pNextNode = *phashnode;
firstTime=1;
while (pNextNode) {
if (firstTime) {
printf("HASHNODE=%d\n", i);
firstTime=0;
}
modnum = pNextNode->errNum >> 16;
errnum = pNextNode->errNum & 0xffff;
printf("\tmod %d num %d \"%s\"\n"
, modnum , errnum , pNextNode->message);
msgcount++;
phashnode = &pNextNode->hashnode;
pNextNode = *phashnode;
}
}
printf("\nerrSymDump: total number of error messages=%d\n", msgcount);
}
/****************************************************************
* errSymTestPrint
***************************************************************/
#ifdef __STDC__
void errSymTestPrint(long errNum)
#else
void errSymTestPrint(errNum)
long errNum;
#endif /* __STDC__ */
{
char message[256];
unsigned short modnum;
unsigned short errnum;
if (!initialized)
errSymBld();
message[0] = '\0';
modnum = errNum >> 16;
errnum = errNum & 0xffff;
if (modnum < 501) {
printf("Usage: errSymTestPrint(long errNum) \n");
printf("errSymTestPrint: module number < 501 \n");
return;
}
errSymFind(errNum, message);
if ( message[0] == '\0' ) return;
printf("module %hu number %hu message=\"%s\"\n",
modnum, errnum, message);
return;
}
/****************************************************************
* ERRSYMTEST
****************************************************************/
#ifdef __STDC__
void errSymTest(unsigned short modnum, unsigned short begErrNum, unsigned short endErrNum)
#else
void errSymTest(modnum, begErrNum, endErrNum)
unsigned short modnum;
unsigned short begErrNum;
unsigned short endErrNum;
#endif /* __STDC__ */
{
long errNum;
unsigned short errnum;
if (modnum < 501)
return;
/* print range of error messages */
for (errnum = begErrNum; errnum <= endErrNum; errnum++) {
errNum = modnum << 16;
errNum |= (errnum & 0xffff);
errSymTestPrint(errNum);
}
}