136 lines
3.2 KiB
C
136 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2015, Intel Corporation.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1) Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* 2) Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* 3) Neither the name of Intel Corporation nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <sys/stat.h>
|
|
|
|
#define HEAP_SIZE 4096
|
|
unsigned char heap[HEAP_SIZE];
|
|
unsigned int heap_sz = 0;
|
|
|
|
static int _stdout_hook_default(int c) {
|
|
(void)(c); /* Prevent warning about unused argument */
|
|
|
|
return EOF;
|
|
}
|
|
|
|
static int (*_stdout_hook)(int) = _stdout_hook_default;
|
|
|
|
void __stdout_hook_install(int (*hook)(int)) {
|
|
_stdout_hook = hook;
|
|
}
|
|
|
|
static unsigned char _stdin_hook_default(void) {
|
|
return 0;
|
|
}
|
|
|
|
static unsigned char (*_stdin_hook)(void) = _stdin_hook_default;
|
|
|
|
void __stdin_hook_install(unsigned char (*hook)(void)) {
|
|
_stdin_hook = hook;
|
|
}
|
|
|
|
int read( int fd, char *buf, int nbytes) {
|
|
int i = 0;
|
|
|
|
for (i = 0; i < nbytes; i++) {
|
|
*(buf + i) = _stdin_hook();
|
|
if ((*(buf + i) == '\n') || (*(buf + i) == '\r')) {
|
|
i++;
|
|
break;
|
|
}
|
|
}
|
|
return (i);
|
|
}
|
|
|
|
int write(int fd, char *buf, int nbytes) {
|
|
int i;
|
|
|
|
for (i = 0; i < nbytes; i++) {
|
|
if (*(buf + i) == '\n') {
|
|
_stdout_hook ('\r');
|
|
}
|
|
_stdout_hook (*(buf + i));
|
|
}
|
|
return (nbytes);
|
|
}
|
|
|
|
int fstat( int fd, struct stat *buf) {
|
|
buf->st_mode = S_IFCHR; /* Always pretend to be a tty */
|
|
buf->st_blksize = 0;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int isatty(int file) {
|
|
return 1;
|
|
}
|
|
|
|
|
|
int kill(int i, int j) {
|
|
return 0;
|
|
}
|
|
|
|
int getpid() {
|
|
return 0;
|
|
}
|
|
|
|
int _fstat(int file, struct stat *st) {
|
|
st->st_mode = S_IFCHR;
|
|
return 0;
|
|
}
|
|
|
|
|
|
void exit(int status) {
|
|
write(1, "exit", 4);
|
|
while (1) {
|
|
;
|
|
}
|
|
}
|
|
|
|
int close(int file) {
|
|
return -1;
|
|
}
|
|
|
|
int lseek(int file, int ptr, int dir) {
|
|
return 0;
|
|
}
|
|
|
|
void *sbrk(int count) {
|
|
void *ptr = heap + heap_sz;
|
|
if ((heap_sz + count) <= HEAP_SIZE) {
|
|
heap_sz += count;
|
|
return ptr;
|
|
} else {
|
|
return (void *)-1;
|
|
}
|
|
}
|