logging.c

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#include <sys/param.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
 
#include "logging.h"
#include "csm_all.h"
 
 
int sm_debug_write_flag = 0;
 
const char * sm_program_name = 0;
 
void sm_debug_write(int flag) {
        sm_debug_write_flag = flag;
}
 
char sm_program_name_temp[256];
void sm_set_program_name(const char*name) {
        my_basename_no_suffix(name, sm_program_name_temp);
        sm_program_name = sm_program_name_temp;
}
 
int checked_for_xterm_color = 0;
int xterm_color_available = 0;
 
 
void check_for_xterm_color() {
        if(checked_for_xterm_color) return;
        checked_for_xterm_color = 1;
        
        const char * term = getenv("TERM");
        if(!term) term = "unavailable";
        xterm_color_available = !strcmp(term, "xterm-color") || !strcmp(term, "xterm") 
                || !strcmp(term, "rxvt");
/*      sm_info("Terminal type: '%s', colors: %d\n", term, xterm_color_available); */
}
 
#define XTERM_COLOR_RED "\e[1;37;41m"
#define XTERM_COLOR_RESET "\e[0m"
 
#define XTERM_ERROR XTERM_COLOR_RED
#define XTERM_DEBUG "\e[1;35;40m"
 
void sm_write_context();
 
void sm_error(const char *msg, ...)
{
        check_for_xterm_color();
        if(xterm_color_available)
                fprintf(stderr, XTERM_ERROR);
                
        if(sm_program_name) 
                fprintf(stderr, "%s: ", sm_program_name);
        
        sm_write_context();
        
        if(!xterm_color_available) 
                fputs(":err: ", stderr);
 
        va_list ap;
        va_start(ap, msg);
        vfprintf(stderr, msg, ap);
        
        if(xterm_color_available)
                fprintf(stderr, XTERM_COLOR_RESET);
}
 
void sm_info(const char *msg, ...)
{
        check_for_xterm_color();
        
        if(sm_program_name) 
                fprintf(stderr, "%s: ", sm_program_name);
        
        sm_write_context();
        
        if(!xterm_color_available) 
                fputs(":inf: ", stderr);
        
        va_list ap;
        va_start(ap, msg);
        vfprintf(stderr, msg, ap);
}
 
void sm_debug(const char *msg, ...)
{
        if(!sm_debug_write_flag) return;
        
        check_for_xterm_color();
        
        if(xterm_color_available)
                fprintf(stderr, XTERM_DEBUG);
        
        if(sm_program_name) 
                fprintf(stderr, "%s: ", sm_program_name);
 
        sm_write_context();
 
        if(!xterm_color_available) 
                fputs(":dbg: ", stderr);
        
        va_list ap;
        va_start(ap, msg);
        vfprintf(stderr, msg, ap);
        
        
        if(xterm_color_available)
                fprintf(stderr, XTERM_COLOR_RESET);
}
 
#define MAX_CONTEXTS 1000
const char * sm_log_context_name[MAX_CONTEXTS] = {""};
int sm_log_context = 0;
 
void sm_log_push(const char*cname) {
        if(sm_debug_write_flag) {
                char message[1024]; sprintf(message, "  ___ %s \n", cname);
                sm_debug(message);
        }
 
        assert(sm_log_context<MAX_CONTEXTS-1);
        sm_log_context++;
        sm_log_context_name[sm_log_context] = cname;
}
 
 
void sm_log_pop() {
        assert(sm_log_context>0);
        sm_log_context--;
}
 
void sm_write_context() {
        for(int i=0;i<sm_log_context;i++)
                fprintf(stderr, "   ");
        
}