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#include "pk.h"
#include "file.h"
#include "frontend.h"
#include <stdint.h>
#include <stdarg.h>
#include <stdbool.h>
#include <string.h>
int vsnprintf(char* out, size_t n, const char* s, va_list vl)
{
bool format = false;
bool longarg = false;
size_t pos = 0;
for( ; *s; s++)
{
if(format)
{
switch(*s)
{
case 'l':
longarg = true;
break;
case 'p':
longarg = true;
if (++pos < n) out[pos-1] = '0';
if (++pos < n) out[pos-1] = 'x';
case 'x':
{
long num = longarg ? va_arg(vl, long) : va_arg(vl, int);
for(int i = 2*(longarg ? sizeof(long) : sizeof(int))-1; i >= 0; i--) {
int d = (num >> (4*i)) & 0xF;
if (++pos < n) out[pos-1] = (d < 10 ? '0'+d : 'a'+d-10);
}
longarg = false;
format = false;
break;
}
case 'd':
{
long num = longarg ? va_arg(vl, long) : va_arg(vl, int);
if (num < 0) {
num = -num;
if (++pos < n) out[pos-1] = '-';
}
long digits = 1;
for (long nn = num; nn /= 10; digits++)
;
for (int i = digits-1; i >= 0; i--) {
if (pos + i + 1 < n) out[pos + i] = '0' + (num % 10);
num /= 10;
}
pos += digits;
longarg = false;
format = false;
break;
}
case 's':
{
const char* s2 = va_arg(vl,const char*);
while(*s2)
if (++pos < n) out[pos-1] = *s2++;
longarg = false;
format = false;
break;
}
case 'c':
{
if (++pos < n) out[pos-1] = (char)va_arg(vl,int);
longarg = false;
format = false;
break;
}
default:
panic("bad fmt");
}
}
else if(*s == '%')
format = true;
else
if (++pos < n) out[pos-1] = *s;
}
if (pos < n)
out[pos] = 0;
else if (n)
out[n-1] = 0;
return pos;
}
static void vprintk(const char* s, va_list vl)
{
char out[256]; // XXX
int res = vsnprintf(out, sizeof(out), s, vl);
file_write(stderr, out, res < sizeof(out) ? res : sizeof(out));
}
void printk(const char* s, ...)
{
va_list vl;
va_start(vl, s);
vprintk(s, vl);
va_end(vl);
}
int snprintf(char* out, size_t n, const char* s, ...)
{
va_list vl;
va_start(vl, s);
int res = vsnprintf(out, n, s, vl);
va_end(vl);
return res;
}
void dump_tf(trapframe_t* tf)
{
static const char* regnames[] = {
"z ", "ra", "sp", "gp", "tp", "t0", "t1", "t2",
"s0", "s1", "a0", "a1", "a2", "a3", "a4", "a5",
"a6", "a7", "s2", "s3", "s4", "s5", "s6", "s7",
"s8", "s9", "sA", "sB", "t3", "t4", "t5", "t6"
};
tf->gpr[0] = 0;
for(int i = 0; i < 32; i+=4)
{
for(int j = 0; j < 4; j++)
printk("%s %lx%c",regnames[i+j],tf->gpr[i+j],j < 3 ? ' ' : '\n');
}
printk("pc %lx va %lx insn %x sr %lx\n", tf->epc, tf->badvaddr,
(uint32_t)tf->insn, tf->status);
}
void do_panic(const char* s, ...)
{
va_list vl;
va_start(vl, s);
vprintk(s, vl);
die(-1);
va_end(vl);
}
void kassert_fail(const char* s)
{
register uintptr_t ra asm ("ra");
do_panic("assertion failed @ %p: %s\n", ra, s);
}
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