source: trunk/minix/commands/i386/asmconv/asmconv.c@ 20

/*      asmconv 1.11 - convert 80X86 assembly           Author: Kees J. Bot
 *                                                              24 Dec 1993
 */
static char version[] = "1.11";

#define nil 0
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include "asmconv.h"
#include "asm86.h"
#include "languages.h"

void fatal(char *label)
{
        fprintf(stderr, "asmconv: %s: %s\n", label, strerror(errno));
        exit(EXIT_FAILURE);
}

void *allocate(void *mem, size_t size)
/* A checked malloc/realloc().  Yes, I know ISO C allows realloc(NULL, size). */
{
        mem= mem == nil ? malloc(size) : realloc(mem, size);
        if (mem == nil) fatal("malloc()");
        return mem;
}

void deallocate(void *mem)
/* Free a malloc()d cell.  (Yes I know ISO C allows free(NULL) */
{
        if (mem != nil) free(mem);
}

char *copystr(const char *s)
{
        char *c;

        c= allocate(nil, (strlen(s) + 1) * sizeof(s[0]));
        strcpy(c, s);
        return c;
}

int isanumber(const char *s)
/* True if s can be turned into a number. */
{
        char *end;

        (void) strtol(s, &end, 0);
        return end != s && *end == 0;
}

/* "Invisible" globals. */
int asm_mode32= (sizeof(int) == 4);
int err_code= EXIT_SUCCESS;

int main(int argc, char **argv)
{
        void (*parse_init)(char *file);
        asm86_t *(*get_instruction)(void);
        void (*emit_init)(char *file, const char *banner);
        void (*emit_instruction)(asm86_t *instr);
        char *lang_parse, *lang_emit, *input_file, *output_file;
        asm86_t *instr;
        char banner[80];

        if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'm') {
                if (strcmp(argv[1], "-mi86") == 0) {
                        set_use16();
                } else
                if (strcmp(argv[1], "-mi386") == 0) {
                        set_use32();
                } else {
                        fprintf(stderr, "asmconv: '%s': unknown machine\n",
                                argv[1]+2);
                }
                argc--;
                argv++;
        }

        if (argc < 3 || argc > 5) {
                fprintf(stderr,
"Usage: asmconv <input-type> <output-type> [input-file [output-file]]\n");
                exit(EXIT_FAILURE);
        }

        lang_parse= argv[1];
        lang_emit= argv[2];
        input_file= argc < 4 ? nil : argv[3];
        output_file= argc < 5 ? nil : argv[4];

        /* Choose the parsing routines. */
        if (strcmp(lang_parse, "ack") == 0) {
                /* Standard ACK. */
                parse_init= ack_parse_init;
                get_instruction= ack_get_instruction;
        } else
        if (strcmp(lang_parse, "ncc") == 0) {
                /* ACK Xenix assembly, a black sheep among ACK assemblies. */
                parse_init= ncc_parse_init;
                get_instruction= ncc_get_instruction;
        } else
        if (strcmp(lang_parse, "gnu") == 0) {
                /* GNU assembly.  Parser by R.S. Veldema. */
                parse_init= gnu_parse_init;
                get_instruction= gnu_get_instruction;
        } else
        if (strcmp(lang_parse, "bas") == 0) {
                /* Bruce Evans' assembler. */
                parse_init= bas_parse_init;
                get_instruction= bas_get_instruction;
        } else {
                fprintf(stderr, "asmconv: '%s': unknown input language\n",
                        lang_parse);
                exit(EXIT_FAILURE);
        }

        /* Choose the output language. */
        if (strcmp(lang_emit, "ack") == 0) {
                /* Standard ACK. */
                emit_init= ack_emit_init;
                emit_instruction= ack_emit_instruction;
        } else
        if (strcmp(lang_emit, "ncc") == 0) {
                /* ACK Xenix assembly, can be read by BAS and the 8086 ACK
                 * ANSI C compiler.  (Allows us to compile the Boot Monitor.)
                 */
                emit_init= ncc_emit_init;
                emit_instruction= ncc_emit_instruction;
        } else
        if (strcmp(lang_emit, "gnu") == 0) {
                /* GNU assembler.  So we can assemble the ACK stuff among the
                 * kernel sources and in the library.
                 */
                emit_init= gnu_emit_init;
                emit_instruction= gnu_emit_instruction;
        } else {
                fprintf(stderr, "asmconv: '%s': unknown output language\n",
                        lang_emit);
                exit(EXIT_FAILURE);
        }

        sprintf(banner, "Translated from %s to %s by asmconv %s",
                                        lang_parse, lang_emit, version);

        (*parse_init)(input_file);
        (*emit_init)(output_file, banner);
        for (;;) {
                instr= (*get_instruction)();
                (*emit_instruction)(instr);
                if (instr == nil) break;
                del_asm86(instr);
        }
        exit(err_code);
}