45ce77df85
* libc/include/fcntl.h: Declare it. Add some fcntl defines. * libc/include/stdio.h: Remove fcntl defines, Declare g_stdout. * module/language/c99/compiler.mes (c99-input->ast): Define O_WRONLY, O_RDWR. * module/mes/guile.mes (with-output-to-file, with-output-to-port): New functions. * src/posix.c (current_output_port, open_output_file, set_current_output_port): New functions. * libc/mlibc.c (open): Add optional mode parameter. * module/mes/libc-i386.mes (i386:open): Forward third parameter. * scaffold/mini-mes.c (main): Init g_stdout. * src/mes.c (main): Likewise.
506 lines
8.2 KiB
C
506 lines
8.2 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
|
|
* Mes --- Maxwell Equations of Software
|
|
* Copyright © 2016,2017 Jan Nieuwenhuizen <janneke@gnu.org>
|
|
*
|
|
* This file is part of Mes.
|
|
*
|
|
* Mes is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* Mes is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Mes. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
char **g_environment = 0;
|
|
int g_stdin = 0;
|
|
|
|
#include <stdio.h>
|
|
#include <mlibc.h>
|
|
|
|
#if __GNUC__ && !POSIX
|
|
|
|
#include <stdlib.h>
|
|
|
|
void
|
|
exit (int code)
|
|
{
|
|
asm (
|
|
"movl %0,%%ebx\n\t"
|
|
"movl $1,%%eax\n\t"
|
|
"int $0x80"
|
|
: // no outputs "=" (r)
|
|
: "" (code)
|
|
);
|
|
// not reached
|
|
exit (0);
|
|
}
|
|
|
|
int
|
|
read (int fd, void* buf, size_t n)
|
|
{
|
|
int r;
|
|
//syscall (SYS_write, fd, s, n));
|
|
asm (
|
|
"movl %1,%%ebx\n\t"
|
|
"movl %2,%%ecx\n\t"
|
|
"movl %3,%%edx\n\t"
|
|
|
|
"movl $0x3,%%eax\n\t"
|
|
"int $0x80\n\t"
|
|
|
|
"mov %%eax,%0\n\t"
|
|
: "=r" (r)
|
|
: "" (fd), "" (buf), "" (n)
|
|
: "eax", "ebx", "ecx", "edx"
|
|
);
|
|
return r;
|
|
}
|
|
|
|
int
|
|
write (int fd, char const* s, int n)
|
|
{
|
|
int r;
|
|
//syscall (SYS_write, fd, s, n));
|
|
asm (
|
|
"mov %1,%%ebx\n\t"
|
|
"mov %2,%%ecx\n\t"
|
|
"mov %3,%%edx\n\t"
|
|
|
|
"mov $0x4, %%eax\n\t"
|
|
"int $0x80\n\t"
|
|
"mov %%eax,%0\n\t"
|
|
: "=r" (r)
|
|
: "" (fd), "" (s), "" (n)
|
|
: "eax", "ebx", "ecx", "edx"
|
|
);
|
|
return r;
|
|
}
|
|
|
|
int
|
|
open (char const *s, int flags, ...)
|
|
{
|
|
int mode;
|
|
asm (
|
|
"mov %%ebp,%%eax\n\t"
|
|
"add $0x10,%%eax\n\t"
|
|
"mov (%%eax),%%eax\n\t"
|
|
"mov %%eax,%0\n\t"
|
|
: "=mode" (mode)
|
|
: //no inputs ""
|
|
);
|
|
int r;
|
|
//syscall (SYS_open, mode));
|
|
asm (
|
|
"mov %1,%%ebx\n\t"
|
|
"mov %2,%%ecx\n\t"
|
|
"mov %3,%%edx\n\t"
|
|
"mov $0x5,%%eax\n\t"
|
|
"int $0x80\n\t"
|
|
"mov %%eax,%0\n\t"
|
|
: "=r" (r)
|
|
: "" (s), "" (flags), "" (mode)
|
|
: "eax", "ebx", "ecx", "edx"
|
|
);
|
|
return r;
|
|
}
|
|
|
|
int
|
|
access (char const *s, int mode)
|
|
{
|
|
int r;
|
|
//syscall (SYS_access, mode));
|
|
asm (
|
|
"mov %1,%%ebx\n\t"
|
|
"mov %2,%%ecx\n\t"
|
|
"mov $0x21,%%eax\n\t"
|
|
"int $0x80\n\t"
|
|
"mov %%eax,%0\n\t"
|
|
: "=r" (r)
|
|
: "" (s), "" (mode)
|
|
: "eax", "ebx", "ecx"
|
|
);
|
|
return r;
|
|
}
|
|
|
|
void *
|
|
brk (void *p)
|
|
{
|
|
void *r;
|
|
asm (
|
|
"mov %1,%%ebx\n\t"
|
|
|
|
"mov $0x2d,%%eax\n\t"
|
|
"int $0x80\n\t"
|
|
|
|
"mov %%eax,%0\n\t"
|
|
: "=r" (r)
|
|
: "" (p)
|
|
: "eax", "ebx"
|
|
);
|
|
return r;
|
|
}
|
|
|
|
int
|
|
fsync (int fd)
|
|
{
|
|
int r;
|
|
//syscall (SYS_fsync, fd));
|
|
asm (
|
|
"mov %1,%%ebx\n\t"
|
|
|
|
"mov $0x76, %%eax\n\t"
|
|
"int $0x80\n\t"
|
|
"mov %%eax,%0\n\t"
|
|
: "=r" (r)
|
|
: "" (fd)
|
|
: "eax", "ebx"
|
|
);
|
|
return r;
|
|
}
|
|
|
|
int
|
|
fputc (int c, int fd)
|
|
{
|
|
write (fd, (char*)&c, 1);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
putchar (int c)
|
|
{
|
|
write (STDOUT, (char*)&c, 1);
|
|
return 0;
|
|
}
|
|
|
|
void *g_malloc_base = 0;
|
|
|
|
void *
|
|
malloc (size_t size)
|
|
{
|
|
void *p = brk (0);
|
|
if (!g_malloc_base) g_malloc_base = p;
|
|
brk (p+size);
|
|
return p;
|
|
}
|
|
|
|
void *
|
|
realloc (void *p, size_t size)
|
|
{
|
|
(void)p;
|
|
brk (g_malloc_base + size);
|
|
return g_malloc_base;
|
|
}
|
|
|
|
void
|
|
free (void *p)
|
|
{
|
|
int *n = (int*)p-1;
|
|
//munmap ((void*)p, *n);
|
|
}
|
|
|
|
size_t
|
|
strlen (char const* s)
|
|
{
|
|
int i = 0;
|
|
while (s[i]) i++;
|
|
return i;
|
|
}
|
|
|
|
int
|
|
strcmp (char const* a, char const* b)
|
|
{
|
|
while (*a && *b && *a == *b) {a++;b++;}
|
|
return *a - *b;
|
|
}
|
|
|
|
char *
|
|
strcpy (char *dest, char const *src)
|
|
{
|
|
char *p = dest;
|
|
while (*src) *p++ = *src++;
|
|
*p = 0;
|
|
return dest;
|
|
}
|
|
|
|
int
|
|
eputs (char const* s)
|
|
{
|
|
int i = strlen (s);
|
|
write (STDERR, s, i);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
fputs (char const* s, int fd)
|
|
{
|
|
int i = strlen (s);
|
|
write (fd, s, i);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
puts (char const* s)
|
|
{
|
|
int i = strlen (s);
|
|
write (STDOUT, s, i);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
assert_fail (char* s)
|
|
{
|
|
eputs ("assert fail: ");
|
|
eputs (s);
|
|
eputs ("\n");
|
|
*((int*)0) = 0;
|
|
}
|
|
|
|
#define assert(x) ((x) ? (void)0 : assert_fail (#x))
|
|
|
|
int ungetc_char = -1;
|
|
char ungetc_buf[2];
|
|
|
|
int
|
|
getchar ()
|
|
{
|
|
char c;
|
|
int i;
|
|
if (ungetc_char == -1)
|
|
{
|
|
int r = read (g_stdin, &c, 1);
|
|
if (r < 1) return -1;
|
|
i = c;
|
|
}
|
|
else
|
|
i = ungetc_buf[ungetc_char--];
|
|
|
|
if (i < 0) i += 256;
|
|
|
|
return i;
|
|
}
|
|
|
|
int
|
|
ungetc (int c, int fd)
|
|
{
|
|
assert (ungetc_char < 2);
|
|
ungetc_buf[++ungetc_char] = c;
|
|
return c;
|
|
}
|
|
|
|
char const* itoa (int);
|
|
|
|
int
|
|
strncmp (char const* a, char const* b, size_t length)
|
|
{
|
|
while (*a && *b && *a == *b && --length) {a++;b++;}
|
|
return *a - *b;
|
|
}
|
|
|
|
char const*
|
|
getenv (char const* s)
|
|
{
|
|
char **p = g_environment;
|
|
int length = strlen (s);
|
|
while (*p)
|
|
{
|
|
if (!strncmp (s, *p, length) && *(*p + length) == '=') return (*p + length + 1);
|
|
p++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
isdigit (int c)
|
|
{
|
|
return (c>='0') && (c<='9');
|
|
}
|
|
|
|
int
|
|
atoi (char const *s)
|
|
{
|
|
int i = 0;
|
|
int sign = 1;
|
|
if (*s && *s == '-')
|
|
{
|
|
sign = -1;
|
|
s++;
|
|
}
|
|
while (isdigit (*s))
|
|
{
|
|
i *= 10;
|
|
i += (*s - '0');
|
|
s++;
|
|
}
|
|
return i * sign;
|
|
}
|
|
|
|
int
|
|
printf (char const* format, ...)
|
|
{
|
|
int va_arg = 0;
|
|
int va;
|
|
char const *p = format;
|
|
while (*p)
|
|
if (*p != '%')
|
|
putchar (*p++);
|
|
else
|
|
{
|
|
p++;
|
|
char c = *p;
|
|
switch (c)
|
|
{
|
|
case '%': {putchar (*p); break;}
|
|
case 'c':
|
|
{
|
|
asm (
|
|
"mov -0xc(%%ebp),%%eax\n\t"
|
|
"shl $0x2,%%eax\n\t"
|
|
"add %%ebp,%%eax\n\t"
|
|
"add $0xc,%%eax\n\t"
|
|
"mov (%%eax),%%eax\n\t"
|
|
//"mov %%eax,%0\n\t"
|
|
: "=va" (va)
|
|
: //no inputs ""
|
|
);
|
|
putchar ((char)va);
|
|
va_arg++;
|
|
break;
|
|
}
|
|
case 'd': {
|
|
asm (
|
|
"mov -0xc(%%ebp),%%eax\n\t"
|
|
"shl $0x2,%%eax\n\t"
|
|
"add %%ebp,%%eax\n\t"
|
|
"add $0xc,%%eax\n\t"
|
|
"mov (%%eax),%%eax\n\t"
|
|
//"mov %%eax,%0\n\t"
|
|
: "=va" (va)
|
|
: //no inputs ""
|
|
);
|
|
puts (itoa ((int)va));
|
|
va_arg++;
|
|
break;
|
|
}
|
|
case 's': {
|
|
asm (
|
|
"mov -0xc(%%ebp),%%eax\n\t"
|
|
"shl $0x2,%%eax\n\t"
|
|
"add %%ebp,%%eax\n\t"
|
|
"add $0xc,%%eax\n\t"
|
|
"mov (%%eax),%%eax\n\t"
|
|
//"mov %%eax,%0\n\t"
|
|
: "=va" (va)
|
|
: //no inputs ""
|
|
);
|
|
puts ((char*)va);
|
|
va_arg++;
|
|
break;
|
|
}
|
|
default: putchar (*p);
|
|
}
|
|
p++;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
char itoa_buf[10];
|
|
|
|
char const*
|
|
itoa (int x)
|
|
{
|
|
//static char itoa_buf[10];
|
|
//char *p = buf+9;
|
|
char *p = itoa_buf;
|
|
p += 9;
|
|
*p-- = 0;
|
|
|
|
//int sign = x < 0;
|
|
int sign;
|
|
sign = x < 0;
|
|
if (sign)
|
|
x = -x;
|
|
|
|
do
|
|
{
|
|
*p-- = '0' + (x % 10);
|
|
x = x / 10;
|
|
} while (x);
|
|
|
|
if (sign)
|
|
*p-- = '-';
|
|
|
|
return p+1;
|
|
}
|
|
|
|
#if POSIX
|
|
#define _GNU_SOURCE
|
|
#include <assert.h>
|
|
#include <fcntl.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#endif // POSIX
|
|
|
|
int
|
|
fdputs (char const* s, int fd)
|
|
{
|
|
int i = strlen (s);
|
|
write (fd, s, i);
|
|
return 0;
|
|
}
|
|
|
|
#if POSIX
|
|
|
|
int
|
|
fdputc (int c, int fd)
|
|
{
|
|
write (fd, (char*)&c, 1);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
putchar (int c)
|
|
{
|
|
write (STDOUT, (char*)&c, 1);
|
|
return 0;
|
|
}
|
|
|
|
int ungetc_char = -1;
|
|
char ungetc_buf[2];
|
|
|
|
int
|
|
getchar ()
|
|
{
|
|
char c;
|
|
int i;
|
|
if (ungetc_char == -1)
|
|
{
|
|
int r = read (g_stdin, &c, 1);
|
|
if (r < 1) return -1;
|
|
i = c;
|
|
}
|
|
else
|
|
i = ungetc_buf[ungetc_char--];
|
|
|
|
if (i < 0) i += 256;
|
|
|
|
return i;
|
|
}
|
|
|
|
int
|
|
fdungetc (int c, int fd)
|
|
{
|
|
assert (ungetc_char < 2);
|
|
ungetc_buf[++ungetc_char] = c;
|
|
return c;
|
|
}
|
|
|
|
#endif // POSIX
|