sgl: src/log.c annotate

sgl

sortof made the ios backend to compile and run ... sortof

author	John Tsiombikas <nuclear@member.fsf.org>
date	Thu, 28 Jun 2012 03:42:26 +0300
parents	0570e27e5ebc
children

rev	line source
nuclear@4	1 #include <stdio.h>
nuclear@4	2 #include <stdlib.h>
nuclear@31	3 #include <string.h>
nuclear@31	4 #include <errno.h>
nuclear@4	5 #include <stdarg.h>
nuclear@4	6 #include "log.h"
nuclear@4	7
nuclear@4	8 void sgl_log(const char *fmt, ...)
nuclear@4	9 {
nuclear@31	10 static int first_run = 1;
nuclear@4	11 va_list ap;
nuclear@4	12 const char *logfile;
nuclear@4	13 FILE *fp;
nuclear@4	14
nuclear@31	15 if((logfile = getenv("SGL_LOG"))) {
nuclear@31	16 if(first_run) {
nuclear@31	17 remove(logfile);
nuclear@31	18 first_run = 0;
nuclear@31	19 }
nuclear@31	20 if(!(fp = fopen(logfile, "a"))) {
nuclear@31	21 fprintf(stderr, "failed to open logfile: %s: %s\n", logfile, strerror(errno));
nuclear@31	22 fp = stderr;
nuclear@31	23 }
nuclear@31	24 } else {
nuclear@4	25 fp = stderr;
nuclear@4	26 }
nuclear@4	27
nuclear@4	28 va_start(ap, fmt);
nuclear@4	29 vfprintf(fp, fmt, ap);
nuclear@4	30 va_end(ap);
nuclear@4	31
nuclear@5	32 if(fp != stderr) {
nuclear@5	33 fclose(fp);
nuclear@5	34 }
nuclear@4	35 }