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// MIT License, Copyright (c) 2020 Marvin Borner
#include <arg.h>
#include <assert.h>
#include <conv.h>
#include <def.h>
#include <mem.h>
#include <str.h>
#define RED "\x1B[1;31m"
#define GRN "\x1B[1;32m"
#define YEL "\x1B[1;33m"
#define BLU "\x1B[1;34m"
#define MAG "\x1B[1;35m"
#define CYN "\x1B[1;36m"
#define WHT "\x1B[1;37m"
#define RES "\x1B[0m"
int vsnprintf(char *str, u32 size, const char *format, va_list ap)
{
u32 length = 0;
int temp_int;
char temp_ch;
char *temp_str;
f64 temp_double;
char buffer[64] = { 0 };
char ch;
while ((ch = *format++)) {
if (ch == '%') {
switch (*format++) {
case '%':
str[length++] = '%';
break;
case 'c':
temp_ch = va_arg(ap, int);
str[length++] = temp_ch;
break;
case 's':
temp_str = va_arg(ap, char *);
length += strlcpy(&str[length], temp_str, size - length);
break;
case 'd':
temp_int = va_arg(ap, int);
itoa(temp_int, buffer, 10);
length += strlcpy(&str[length], buffer, size - length);
break;
case 'x':
temp_int = va_arg(ap, int);
itoa(temp_int, buffer, 16);
length += strlcpy(&str[length], buffer, size - length);
break;
case 'f':
temp_double = va_arg(ap, double);
ftoa(temp_double, buffer, 5);
length += strlcpy(&str[length], buffer, size - length);
break;
default:
print("Unknown printf format\n");
}
} else {
str[length++] = ch;
}
}
return length;
}
int snprintf(char *str, u32 size, const char *format, ...)
{
va_list ap;
va_start(ap, format);
int len = vsnprintf(str, size, format, ap);
va_end(ap);
return len;
}
#ifdef USER
#include <sys.h>
int vprintf(const char *format, va_list ap)
{
return viprintf(IO_LOGGER, format, ap);
}
int vfprintf(const char *path, const char *format, va_list ap)
{
char buf[1024] = { 0 };
int len = vsnprintf(buf, sizeof(buf), format, ap);
return write(path, buf, 0, len);
}
int viprintf(enum io_type io, const char *format, va_list ap)
{
char buf[1024] = { 0 };
int len = vsnprintf(buf, sizeof(buf), format, ap);
return io_write(io, buf, 0, len);
}
int fprintf(const char *path, const char *format, ...)
{
va_list ap;
va_start(ap, format);
int len = vfprintf(path, format, ap);
va_end(ap);
return len;
}
int iprintf(enum io_type io, const char *format, ...)
{
va_list ap;
va_start(ap, format);
int len = viprintf(io, format, ap);
va_end(ap);
return len;
}
int printf(const char *format, ...)
{
va_list ap;
va_start(ap, format);
int len = vprintf(format, ap);
va_end(ap);
return len;
}
int log(const char *format, ...)
{
va_list ap;
va_start(ap, format);
int len = viprintf(IO_LOGGER, format, ap);
va_end(ap);
return len;
}
NORETURN void err(int code, const char *format, ...)
{
if (errno != EOK)
log("ERRNO: %d (%s)\n", errno, strerror(errno));
va_list ap;
va_start(ap, format);
viprintf(IO_LOGGER, format, ap);
va_end(ap);
exit(code);
}
int print(const char *str)
{
return io_write(IO_LOGGER, str, 0, strlen(str));
}
#else
// The kernel prints everything into the serial console
#include <drivers/cpu.h>
#include <drivers/serial.h>
#include <mm.h>
#include <proc.h>
static void print_kernel(const char *str)
{
serial_print(RED);
serial_print("[KER] ");
serial_print(str);
serial_print(RES);
}
int vprintf(const char *format, va_list ap)
{
char buf[1024] = { 0 };
int len = vsnprintf(buf, sizeof(buf), format, ap);
print_kernel(buf);
return len;
}
int printf(const char *format, ...)
{
va_list ap;
va_start(ap, format);
int len = vprintf(format, ap);
va_end(ap);
return len;
}
int print_prefix(void)
{
char buf[64] = { 0 };
snprintf(buf, sizeof(buf), CYN "[LOG] to %s (%d): ", proc_current()->name,
proc_current()->pid);
serial_print(buf);
return 1;
}
int print(const char *str)
{
print_kernel(str);
return strlen(str);
}
void print_trace(u32 count)
{
struct frame {
struct frame *ebp;
u32 eip;
} * stk;
__asm__ volatile("movl %%ebp, %0;" : "=r"(stk));
print("EBP\tEIP\n");
for (u32 i = 0; stk && memory_readable(stk) && i < count; i++) {
if (!stk->ebp || !stk->eip)
break;
printf("0x%x\t0x%x\n", stk->ebp, stk->eip);
stk = stk->ebp;
}
}
#endif
void panic(const char *format, ...)
{
char buf[1024] = { 0 };
va_list ap;
va_start(ap, format);
vsnprintf(buf, sizeof(buf), format, ap);
va_end(ap);
#ifdef KERNEL
print("--- DON'T PANIC! ---\n");
print(buf);
print_trace(10);
while (1)
__asm__ volatile("cli\nhlt");
#else
err(1, buf);
#endif
}
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