scsh-0.5/main-original.c

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1995-10-13 23:34:21 -04:00
/* Copyright (c) 1993, 1994 Richard Kelsey and Jonathan Rees.
See file COPYING. */
#include <stdio.h>
#if !defined(DEFAULT_HEAP_SIZE)
/* 1.5 megacell = 6 megabytes (3 meg per semispace) */
#define DEFAULT_HEAP_SIZE 1500000L
#endif
#if !defined(DEFAULT_STACK_SIZE)
/* 2500 cells = 10000 bytes */
#define DEFAULT_STACK_SIZE 2500L
#endif
#if defined(STATIC_AREAS)
#define DEFAULT_IMAGE_NAME NULL
#else
/* DEFAULT_IMAGE_NAME should be defined using the -D switch to cc. */
#if !defined(DEFAULT_IMAGE_NAME)
#define DEFAULT_IMAGE_NAME "s48.image"
#endif
#endif /* STATIC_AREAS */
char *object_file; /* specified via a command line argument */
char *reloc_file; /* dynamic loading will set this */
main(argc, argv)
int argc; char **argv;
{
char *image_name = DEFAULT_IMAGE_NAME;
long heap_size = DEFAULT_HEAP_SIZE; /* in numbers of cells */
long stack_size = DEFAULT_STACK_SIZE; /* in numbers of cells */
int errors = 0;
long return_value;
extern void sysdep_init();
extern long required_init_space();
extern void initialize_vm();
extern long call_startup_procedure();
extern long check_image_header();
extern long read_image();
extern void register_static_areas();
void *heap, *stack;
long required_heap_size, startup_proc;
#if defined(STATIC_AREAS)
extern long entry;
extern long p_count, *p_areas[], p_sizes[];
extern long i_count, *i_areas[], i_sizes[];
#endif
long vm_argc = 0;
char *me = *argv; /* Save program name. */
object_file = reloc_file = NULL;
argv++; argc--; /* Skip program name. */
for (; argc > 0; argc--, argv++)
if (argv[0][0] == '-')
switch (argv[0][1]) {
case 'h':
argc--; argv++;
if (argc == 0) { errors++; break; }
heap_size = atoi(*argv);
if (heap_size <= 0) errors++;
break;
case 's':
argc--; argv++;
if (argc == 0) { errors++; break; }
stack_size = atoi(*argv);
if (stack_size <= 0) errors++;
break;
case 'i':
argc--; argv++;
if (argc == 0) { errors++; break; }
image_name = *argv;
break;
case 'a':
argc--;
vm_argc = argc; /* remaining args are passed to the VM */
argc = 0;
break;
case 'o':
argc--; argv++;
if (argc == 0) { errors++; break; }
object_file = *argv;
break;
default:
fprintf(stderr, "Invalid argument: %s\n", *argv);
errors++;
}
else
if (argv[0][0] != '\0')
{ fprintf(stderr, "Invalid argument: %s\n", *argv);
errors++; }
if (errors != 0) {
fprintf(stderr,
"Usage: %s [options] [-a arguments]\n\
Options: -h <total heap size in words>\n\
-s <stack buffer size in words>\n\
-i <image file name>\n\
-o <object file name>\n",
me);
return 1;
}
sysdep_init();
scheme48_init();
if (image_name == NULL)
required_heap_size = 0;
else {
/* check_image_header returns number of bytes; required_heap_size
is number of cells. */
required_heap_size = check_image_header(image_name) >> 2;
if (-1 == required_heap_size) {
fprintf(stderr, "image file %s is unusable\n", image_name);
return 1; }
}
required_heap_size += required_init_space(argv, vm_argc);
/* two semi-spaces, plus we want some room to maneuver */
if (heap_size < 4 * required_heap_size) {
fprintf(stderr, "heap size %ld is too small, using %ld\n",
heap_size, 4 * required_heap_size);
heap_size = 4 * required_heap_size; }
heap = (void *) malloc(heap_size * sizeof(long));
stack = (void *) malloc(stack_size * sizeof(long));
if (!heap || !stack) {
fprintf(stderr, "system is out of memory\n");
return 1; }
initialize_vm(heap, heap_size, stack, stack_size);
#if defined(STATIC_AREAS)
if (image_name == NULL) {
register_static_areas(p_count, p_areas, p_sizes,
i_count, i_areas, i_sizes);
startup_proc = entry;
} else
startup_proc = read_image(image_name, 0L);
#else
startup_proc = read_image(image_name, 0L);
#endif
return_value = call_startup_procedure(startup_proc, argv, vm_argc);
if (reloc_file != NULL)
if (0 != unlink(reloc_file))
fprintf(stderr, "unable to delete file %s\n", reloc_file);
return(return_value);
}