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#include <stdio.h>
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2
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#include <string.h>
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3
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#include <getopt.h>
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#include "mem.h"
#include "stack.h"
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#include "disasm.h"
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7
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8
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uint32_t load_program(const char* path)
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{
FILE *fp = fopen(path,"r");
fseek(fp, 0L, SEEK_END);
long file_size = ftell(fp);
rewind(fp);
fread(mem,1,(size_t)file_size,fp);
fclose(fp);
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16
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return (uint32_t)file_size/2;
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17
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}
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18
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19
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void initializevm(char *program)
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{
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initialize_stack();
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memset(regs,0x00,sizeof(uint16_t)*NUM_REGISTERS);
memset(mem,0x00,sizeof(uint16_t)*MEMSIZE);
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load_program(program);
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}
void startvm(char *program)
{
initializevm(program);
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start_execution();
free_stack();
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}
void disasm(char *program)
{
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stderr = stdout;
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disassemble_program(load_program(program));
}
void debug(char *program)
{
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initializevm(program);
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debug_program();
free_stack();
}
int main(int argc, char** argv)
{
uint8_t debug_flag = 0;
uint8_t disasm_flag = 0;
uint8_t err = 0;
char c;
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char *program = NULL;
while ((c = (char)getopt(argc, argv, "s:d:")) != -1)
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{
switch(c)
{
case 'd':
debug_flag = 1;
program = optarg;
break;
case 's':
disasm_flag = 1;
program = optarg;
break;
case '?':
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67
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default:
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err = 1;
break;
}
}
if(err)
{
fprintf(stderr,"Error parsing arguments\n");
return 1;
}
else if(debug_flag && disasm_flag)
{
fprintf(stderr,"-d and -s are mutually exclusive\n");
return 1;
}
else if(!(debug_flag || disasm_flag))
{
if(argc != 2)
{
fprintf(stderr,"No program specified\n");
return 1;
}
startvm(argv[1]);
}
else if(debug_flag)
{
debug(program);
}
else if(disasm_flag)
{
disasm(program);
}
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99
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return 0;
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100
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}
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