2 files changed, 92 insertions, 0 deletions
diff --git a/lib/logger/log.c b/lib/logger/log.c
new file mode 100644
index 0000000..9348f01
--- /dev/null
+++ b/lib/logger/log.c
@@ -0,0 +1,79 @@
+#define FOOLOS_MODULE_NAME "log"
+
+#include <stdarg.h>
+#include <stdbool.h>
+
+#include "log.h"
+
+#include "kernel/kernel.h"
+#include "kernel/config.h"
+#include "terminal/vt52.h"
+#include "kernel/timer.h"
+
+
+static char buffer[LOG_BUF_SIZE];
+static int first=0;
+static int last=0;
+static bool init=true;// 
+
+
+static void log_string(char *str)
+{
+    while(*str!=0)
+    {
+	fifo_put(&get_fool()->fifo_stdout,*(str++));
+    }
+}
+
+void log(char *module_name, int log_level, char *format_string, ...)
+{
+
+    #ifdef FOOLOS_LOG_OFF
+    return;
+    #endif
+
+    if(log_level<FOOLOS_LOG_INFO)return;
+
+    char buf_info[256];
+    char buf_log[256];
+    char buf_time[20];
+
+    uint32_t t=timer_get_ticks();
+    uint32_t s=t/25;
+    uint32_t ms=t*1000/25-1000*s;
+
+    tfp_sprintf(buf_time,"[%3d.%05d]",s,ms);
+
+    va_list va;
+    va_start(va,format_string);
+    tfp_vsprintf(buf_info,format_string,va);
+    va_end(va);
+
+    tfp_sprintf(buf_log,"%s %s: %s\n",buf_time,module_name,buf_info);
+
+    if(init)log_string(buf_log);
+
+    for(int i=0;buf_log[i]!=0;i++)
+    {
+	buffer[last]=buf_log[i];
+	last=(last+1)%LOG_BUF_SIZE;
+	if(first<last)if(last-first>=LOG_BUF_SIZE)first=(first+1)%LOG_BUF_SIZE;
+	if(last>first)if(LOG_BUF_SIZE-last+first>=LOG_BUF_SIZE)first=(first+1)%LOG_BUF_SIZE;
+    }
+
+
+}
+
+void panic(char *module_name,  char *message)
+{
+    char buf_log[256];
+    tfp_sprintf(buf_log,"KERNEL PANIC !! %s: %s\n",module_name,message);
+    log_string(buf_log);
+
+    while(1)
+    {
+        asm volatile("cli");
+	asm volatile("hlt");
+    }
+
+}
diff --git a/lib/logger/log.h b/lib/logger/log.h
new file mode 100644
index 0000000..38f1219
--- /dev/null
+++ b/lib/logger/log.h
@@ -0,0 +1,13 @@
+#ifndef FOOLOS_LOG_H
+#define FOOLOS_LOG_H
+
+#define FOOLOS_LOG_ERROR 5
+#define FOOLOS_LOG_WARNING 4
+#define FOOLOS_LOG_INFO 3
+#define FOOLOS_LOG_DEBUG 2
+#define FOOLOS_LOG_FINE 1
+
+void log(char *module_name, int prio, char *format_string, ...);
+void panic(char *module_name, char *format_string);
+
+#endif