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/*

  syscalls.c -- Hardware-dependent functions for CodeSourcery libraries.

  These are just stubs meant to keep the compiler happy. Once I find out how

  to exclude newlib stuff from the compilation, thses functions will be

  removed.

*/

#include <sys/stat.h>

int close(int file){

    return -1;

}

int fstat(int file, struct stat *st){

    st->st_mode = S_IFCHR;

    return 0;

}

int isatty(int file){

    return 1;

}

int lseek(int file, int ptr, int dir){

    return 0;

}

int open(const char *name, int flags, int mode){

    return -1;

}

int read(int file, char *ptr, int len){

    /* use gets() to read from console */

    return 0;

}

char *heap_end = 0;

/* Stub -- broken -- do not use */

caddr_t sbrk(int incr){

    //extern char heap_low; /* Defined by the linker */

    //extern char heap_top; /* Defined by the linker */

    char *prev_heap_end;

    if (heap_end == 0){

        heap_end = (char *)0x00010000; //&heap_low;

    }

    prev_heap_end = heap_end;

    if ((unsigned)(heap_end + incr) > 0x00020000 /*&heap_top */){

        /* Heap and stack collision */

        return (caddr_t)0;

    }

    heap_end += incr;

    return (caddr_t) prev_heap_end;

}

int write(int file, char *ptr, int len){

    puts(ptr);

}