mirror of
https://github.com/Unidata/netcdf-c.git
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190 lines
3.7 KiB
C
190 lines
3.7 KiB
C
/*********************************************************************
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* Copyright 2010, UCAR/Unidata
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* See netcdf/COPYRIGHT file for copying and redistribution conditions.
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* $Header$
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*********************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <string.h>
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#include "nclog.h"
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#define PREFIXLEN 8
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#define MAXTAGS 256
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#define NCTAGDFALT "Log";
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static int ncinitlog = 0;
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static int nclogging = 0;
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static char* nclogfile = NULL;
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static FILE* nclogstream = NULL;
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static int nctagsize = 0;
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static char** nctagset = NULL;
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static char* nctagdfalt = NULL;
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static char* nctagsetdfalt[] = {"Warning","Error","Note","Debug"};
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static char* nctagname(int tag);
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void
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ncloginit(void)
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{
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ncinitlog = 1;
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ncsetlogging(0);
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nclogfile = NULL;
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nclogstream = NULL;
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/* Use environment variables to preset nclogging state*/
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/* I hope this is portable*/
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if(getenv(ENVFLAG) != NULL) {
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const char* file = getenv(ENVFLAG);
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ncsetlogging(1);
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nclogopen(file);
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}
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nctagdfalt = NCTAGDFALT;
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nctagset = nctagsetdfalt;
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}
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void
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ncsetlogging(int tf)
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{
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if(!ncinitlog) ncloginit();
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nclogging = tf;
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}
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void
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nclogopen(const char* file)
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{
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if(!ncinitlog) ncloginit();
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if(nclogfile != NULL) {
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fclose(nclogstream);
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free(nclogfile);
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nclogfile = NULL;
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}
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if(file == NULL || strlen(file) == 0) {
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/* use stderr*/
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nclogstream = stderr;
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nclogfile = NULL;
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} else if(strcmp(file,"stdout") == 0) {
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/* use stdout*/
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nclogstream = stdout;
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nclogfile = NULL;
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} else if(strcmp(file,"stderr") == 0) {
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/* use stderr*/
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nclogstream = stderr;
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nclogfile = NULL;
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} else {
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int fd;
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nclogfile = strdup(file);
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nclogstream = NULL;
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/* We need to deal with this file carefully
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to avoid unauthorized access*/
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fd = open(nclogfile,O_WRONLY|O_APPEND|O_CREAT,0600);
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if(fd >= 0) {
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nclogstream = fdopen(fd,"a");
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} else {
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free(nclogfile);
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nclogfile = NULL;
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ncsetlogging(0);
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}
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}
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}
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void
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nclogclose(void)
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{
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if(nclogfile != NULL && nclogstream != NULL) {
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fclose(nclogstream);
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nclogstream = NULL;
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if(nclogfile != NULL) free(nclogfile);
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nclogfile = NULL;
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}
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}
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void
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nclog(int tag, const char* fmt, ...)
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{
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va_list args;
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char* prefix;
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if(!nclogging || nclogstream == NULL) return;
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prefix = nctagname(tag);
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fprintf(nclogstream,"%s:",prefix);
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if(fmt != NULL) {
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va_start(args, fmt);
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vfprintf(nclogstream, fmt, args);
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va_end( args );
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}
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fprintf(nclogstream, "\n" );
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fflush(nclogstream);
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}
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#ifdef IGNORE
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void
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nclogtext(int tag, const char* text)
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{
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char line[1024];
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size_t delta = 0;
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const char* eol = text;
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if(!nclogging || nclogstream == NULL) return;
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while(*text) {
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eol = strchr(text,'\n');
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if(eol == NULL)
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delta = strlen(text);
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else
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delta = (eol - text);
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if(delta > 0) memcpy(line,text,delta);
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line[delta] = '\0';
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fprintf(nclogstream," %s\n",line);
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text = eol+1;
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}
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}
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#endif
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void
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nclogtext(int tag, const char* text)
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{
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nclogtextn(tag,text,strlen(text));
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}
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void
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nclogtextn(int tag, const char* text, size_t count)
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{
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if(!nclogging || nclogstream == NULL) return;
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fwrite(text,1,count,nclogstream);
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fflush(nclogstream);
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}
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/* The tagset is null terminated */
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void
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nclogsettags(char** tagset, char* dfalt)
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{
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nctagdfalt = dfalt;
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if(tagset == NULL) {
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nctagsize = 0;
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} else {
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int i;
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char** p = tagset;
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while(*p && i < MAXTAGS) {i++;}
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nctagsize = i;
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}
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nctagset = tagset;
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}
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static char*
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nctagname(int tag)
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{
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if(tag < 0 || tag >= nctagsize) {
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return nctagdfalt;
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} else {
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return nctagset[tag];
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}
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}
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