187 lines
2.7 KiB
C
187 lines
2.7 KiB
C
#include "b.h"
|
|
#include <stdarg.h>
|
|
#include <string.h>
|
|
#include <limits.h>
|
|
|
|
extern intptr_t i_main(intptr_t argc, const char* argv[]);
|
|
|
|
FILE* input_unit;
|
|
FILE* output_unit;
|
|
|
|
static intptr_t i_char(intptr_t s, intptr_t n)
|
|
{
|
|
const char* p = (const char*)(s<<SHIFT);
|
|
return p[n];
|
|
}
|
|
|
|
static intptr_t i_lchar(intptr_t s, intptr_t n, intptr_t c)
|
|
{
|
|
char* p = (char*)(s<<SHIFT);
|
|
p[n] = c;
|
|
return c;
|
|
}
|
|
|
|
static intptr_t i_getchar(void)
|
|
{
|
|
return fgetc(input_unit);
|
|
}
|
|
|
|
static intptr_t i_putchar(intptr_t c)
|
|
{
|
|
fputc(c, output_unit);
|
|
return c;
|
|
}
|
|
|
|
static intptr_t i_putstr(intptr_t s)
|
|
{
|
|
char* p = (char*)(s<<SHIFT);
|
|
char c;
|
|
|
|
while ((c = *p++) != END)
|
|
fputc(c, output_unit);
|
|
|
|
return s;
|
|
}
|
|
|
|
static intptr_t i_getstr(intptr_t s)
|
|
{
|
|
char* p = (char*)(s<<SHIFT);
|
|
|
|
for (;;)
|
|
{
|
|
int c = fgetc(input_unit);
|
|
if ((c == -1) || (c == '\n'))
|
|
break;
|
|
*p++ = c;
|
|
}
|
|
|
|
*p++ = END;
|
|
return s;
|
|
}
|
|
|
|
static void i_flush(void)
|
|
{
|
|
fflush(output_unit);
|
|
}
|
|
|
|
static int tochar(int n)
|
|
{
|
|
if (n <= 9)
|
|
return n + '0';
|
|
return n - 10 + 'a';
|
|
}
|
|
|
|
static void putnum(intptr_t value, int base)
|
|
{
|
|
int i;
|
|
char s[32];
|
|
|
|
if (value < 0)
|
|
{
|
|
fputc('-', output_unit);
|
|
value = -value;
|
|
}
|
|
|
|
i = 0;
|
|
do
|
|
s[i++] = tochar(value % base);
|
|
while ((value /= base) > 0);
|
|
|
|
do
|
|
fputc(s[--i], output_unit);
|
|
while (i > 0);
|
|
}
|
|
|
|
static void i_printf(intptr_t s, ...)
|
|
{
|
|
char* p = (char*)(s<<SHIFT);
|
|
char c;
|
|
|
|
va_list ap;
|
|
va_start(ap, s);
|
|
|
|
while ((c = *p++) != END)
|
|
{
|
|
switch (c)
|
|
{
|
|
case '%':
|
|
{
|
|
intptr_t ss = va_arg(ap, intptr_t);
|
|
|
|
switch ((c = *p++))
|
|
{
|
|
case 's':
|
|
i_putstr(ss);
|
|
break;
|
|
|
|
case 'd':
|
|
putnum(ss, 10);
|
|
break;
|
|
|
|
case 'o':
|
|
putnum(ss, 8);
|
|
break;
|
|
|
|
case 'x':
|
|
putnum(ss, 16);
|
|
break;
|
|
|
|
case 'c':
|
|
fputc(ss, output_unit);
|
|
break;
|
|
|
|
default:
|
|
fputc('?', output_unit);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
fputc(c, output_unit);
|
|
break;
|
|
}
|
|
}
|
|
|
|
va_end(ap);
|
|
}
|
|
|
|
uintptr_t b_char = (uintptr_t)i_char;
|
|
uintptr_t b_lchar = (uintptr_t)i_lchar;
|
|
uintptr_t b_getchar = (uintptr_t)i_getchar;
|
|
uintptr_t b_putchar = (uintptr_t)i_putchar;
|
|
uintptr_t b_putstr = (uintptr_t)i_putstr;
|
|
uintptr_t b_getstr = (uintptr_t)i_getstr;
|
|
uintptr_t b_flush = (uintptr_t)i_flush;
|
|
uintptr_t b_printf = (uintptr_t)i_printf;
|
|
|
|
static uintptr_t* bmodule_stdlib[] =
|
|
{
|
|
&b_char,
|
|
&b_lchar,
|
|
&b_getchar,
|
|
&b_putchar,
|
|
&b_putstr,
|
|
&b_getstr,
|
|
&b_flush,
|
|
&b_printf,
|
|
0
|
|
};
|
|
|
|
void patch_addresses(uintptr_t** p)
|
|
{
|
|
while (*p)
|
|
{
|
|
uintptr_t* q = *p++;
|
|
*q >>= SHIFT;
|
|
}
|
|
}
|
|
|
|
int main(int argc, const char* argv[])
|
|
{
|
|
patch_addresses(bmodule_stdlib);
|
|
binit();
|
|
input_unit = stdin;
|
|
output_unit = stdout;
|
|
return i_main(argc, NULL);
|
|
}
|