Convertir de .c en .java
Tous les outils pour convertir le code C en code Java? Je suis intéressé à convertir ce code en Java:
***************************************************************************/
/*
** UNECM - Decoder for ECM (Error Code Modeler) format.
** Version 1.0
** Copyright (C) 2002 Neill Corlett
**
** This program is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License
** as published by the Free Software Foundation; either version 2
** of the License, or (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/***************************************************************************/
/*
** Portability notes:
**
** - Assumes a 32-bit or higher integer size
** - No assumptions about byte order
** - No assumptions about struct packing
** - No unaligned memory access
*/
/***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/***************************************************************************/
void banner(void) {
fprintf(stderr,
"UNECM - Decoder for Error Code Modeler format v1.0\n"
"Copyright (C) 2002 Neill Corlett\n\n"
);
}
/***************************************************************************/
/* Data types */
#define ecc_uint8 unsigned char
#define ecc_uint16 unsigned short
#define ecc_uint32 unsigned
/* LUTs used for computing ECC/EDC */
static ecc_uint8 ecc_f_lut[256];
static ecc_uint8 ecc_b_lut[256];
static ecc_uint32 edc_lut[256];
/* Init routine */
static void eccedc_init(void) {
ecc_uint32 i, j, edc;
for(i = 0; i < 256; i++) {
j = (i << 1) ^ (i & 0x80 ? 0x11D : 0);
ecc_f_lut[i] = j;
ecc_b_lut[i ^ j] = i;
edc = i;
for(j = 0; j < 8; j++) edc = (edc >> 1) ^ (edc & 1 ? 0xD8018001 : 0);
edc_lut[i] = edc;
}
}
/***************************************************************************/
/*
** Compute EDC for a block
*/
ecc_uint32 edc_partial_computeblock(
ecc_uint32 edc,
const ecc_uint8 *src,
ecc_uint16 size
) {
while(size--) edc = (edc >> 8) ^ edc_lut[(edc ^ (*src++)) & 0xFF];
return edc;
}
void edc_computeblock(
const ecc_uint8 *src,
ecc_uint16 size,
ecc_uint8 *dest
) {
ecc_uint32 edc = edc_partial_computeblock(0, src, size);
dest[0] = (edc >> 0) & 0xFF;
dest[1] = (edc >> 8) & 0xFF;
dest[2] = (edc >> 16) & 0xFF;
dest[3] = (edc >> 24) & 0xFF;
}
/***************************************************************************/
/*
** Compute ECC for a block (can do either P or Q)
*/
static void ecc_computeblock(
ecc_uint8 *src,
ecc_uint32 major_count,
ecc_uint32 minor_count,
ecc_uint32 major_mult,
ecc_uint32 minor_inc,
ecc_uint8 *dest
) {
ecc_uint32 size = major_count * minor_count;
ecc_uint32 major, minor;
for(major = 0; major < major_count; major++) {
ecc_uint32 index = (major >> 1) * major_mult + (major & 1);
ecc_uint8 ecc_a = 0;
ecc_uint8 ecc_b = 0;
for(minor = 0; minor < minor_count; minor++) {
ecc_uint8 temp = src[index];
index += minor_inc;
if(index >= size) index -= size;
ecc_a ^= temp;
ecc_b ^= temp;
ecc_a = ecc_f_lut[ecc_a];
}
ecc_a = ecc_b_lut[ecc_f_lut[ecc_a] ^ ecc_b];
dest[major ] = ecc_a;
dest[major + major_count] = ecc_a ^ ecc_b;
}
}
/*
** Generate ECC P and Q codes for a block
*/
static void ecc_generate(
ecc_uint8 *sector,
int zeroaddress
) {
ecc_uint8 address[4], i;
/* Save the address and zero it out */
if(zeroaddress) for(i = 0; i < 4; i++) {
address[i] = sector[12 + i];
sector[12 + i] = 0;
}
/* Compute ECC P code */
ecc_computeblock(sector + 0xC, 86, 24, 2, 86, sector + 0x81C);
/* Compute ECC Q code */
ecc_computeblock(sector + 0xC, 52, 43, 86, 88, sector + 0x8C8);
/* Restore the address */
if(zeroaddress) for(i = 0; i < 4; i++) sector[12 + i] = address[i];
}
/***************************************************************************/
/*
** Generate ECC/EDC information for a sector (must be 2352 = 0x930 bytes)
** Returns 0 on success
*/
void eccedc_generate(ecc_uint8 *sector, int type) {
ecc_uint32 i;
switch(type) {
case 1: /* Mode 1 */
/* Compute EDC */
edc_computeblock(sector + 0x00, 0x810, sector + 0x810);
/* Write out zero bytes */
for(i = 0; i < 8; i++) sector[0x814 + i] = 0;
/* Generate ECC P/Q codes */
ecc_generate(sector, 0);
break;
case 2: /* Mode 2 form 1 */
/* Compute EDC */
edc_computeblock(sector + 0x10, 0x808, sector + 0x818);
/* Generate ECC P/Q codes */
ecc_generate(sector, 1);
break;
case 3: /* Mode 2 form 2 */
/* Compute EDC */
edc_computeblock(sector + 0x10, 0x91C, sector + 0x92C);
break;
}
}
/***************************************************************************/
unsigned mycounter;
unsigned mycounter_total;
void resetcounter(unsigned total) {
mycounter = 0;
mycounter_total = total;
}
void setcounter(unsigned n) {
if((n >> 20) != (mycounter >> 20)) {
unsigned a = (n+64)/128;
unsigned d = (mycounter_total+64)/128;
if(!d) d = 1;
fprintf(stderr, "Decoding (%02d%%)\r", (100*a) / d);
}
mycounter = n;
}
int unecmify(
FILE *in,
FILE *out
) {
unsigned checkedc = 0;
unsigned char sector[2352];
unsigned type;
unsigned num;
fseek(in, 0, SEEK_END);
resetcounter(ftell(in));
fseek(in, 0, SEEK_SET);
if(
(fgetc(in) != 'E') ||
(fgetc(in) != 'C') ||
(fgetc(in) != 'M') ||
(fgetc(in) != 0x00)
) {
fprintf(stderr, "Header not found!\n");
goto corrupt;
}
for(;;) {
int c = fgetc(in);
int bits = 5;
if(c == EOF) goto uneof;
type = c & 3;
num = (c >> 2) & 0x1F;
while(c & 0x80) {
c = fgetc(in);
if(c == EOF) goto uneof;
num |= ((unsigned)(c & 0x7F)) << bits;
bits += 7;
}
if(num == 0xFFFFFFFF) break;
num++;
if(num >= 0x80000000) goto corrupt;
if(!type) {
while(num) {
int b = num;
if(b > 2352) b = 2352;
if(fread(sector, 1, b, in) != b) goto uneof;
checkedc = edc_partial_computeblock(checkedc, sector, b);
fwrite(sector, 1, b, out);
num -= b;
setcounter(ftell(in));
}
} else {
while(num--) {
memset(sector, 0, sizeof(sector));
memset(sector + 1, 0xFF, 10);
switch(type) {
case 1:
sector[0x0F] = 0x01;
if(fread(sector + 0x00C, 1, 0x003, in) != 0x003) goto uneof;
if(fread(sector + 0x010, 1, 0x800, in) != 0x800) goto uneof;
eccedc_generate(sector, 1);
checkedc = edc_partial_computeblock(checkedc, sector, 2352);
fwrite(sector, 2352, 1, out);
setcounter(ftell(in));
break;
case 2:
sector[0x0F] = 0x02;
if(fread(sector + 0x014, 1, 0x804, in) != 0x804) goto uneof;
sector[0x10] = sector[0x14];
sector[0x11] = sector[0x15];
sector[0x12] = sector[0x16];
sector[0x13] = sector[0x17];
eccedc_generate(sector, 2);
checkedc = edc_partial_computeblock(checkedc, sector + 0x10, 2336);
fwrite(sector + 0x10, 2336, 1, out);
setcounter(ftell(in));
break;
case 3:
sector[0x0F] = 0x02;
if(fread(sector + 0x014, 1, 0x918, in) != 0x918) goto uneof;
sector[0x10] = sector[0x14];
sector[0x11] = sector[0x15];
sector[0x12] = sector[0x16];
sector[0x13] = sector[0x17];
eccedc_generate(sector, 3);
checkedc = edc_partial_computeblock(checkedc, sector + 0x10, 2336);
fwrite(sector + 0x10, 2336, 1, out);
setcounter(ftell(in));
break;
}
}
}
}
if(fread(sector, 1, 4, in) != 4) goto uneof;
fprintf(stderr, "Decoded %ld bytes -> %ld bytes\n", ftell(in), ftell(out));
if(
(sector[0] != ((checkedc >> 0) & 0xFF)) ||
(sector[1] != ((checkedc >> 8) & 0xFF)) ||
(sector[2] != ((checkedc >> 16) & 0xFF)) ||
(sector[3] != ((checkedc >> 24) & 0xFF))
) {
fprintf(stderr, "EDC error (%08X, should be %02X%02X%02X%02X)\n",
checkedc,
sector[3],
sector[2],
sector[1],
sector[0]
);
goto corrupt;
}
fprintf(stderr, "Done; file is OK\n");
return 0;
uneof:
fprintf(stderr, "Unexpected EOF!\n");
corrupt:
fprintf(stderr, "Corrupt ECM file!\n");
return 1;
}
/***************************************************************************/
int main(int argc, char **argv) {
FILE *fin, *fout;
char *infilename;
char *outfilename;
banner();
/*
** Initialize the ECC/EDC tables
*/
eccedc_init();
/*
** Check command line
*/
if((argc != 2) && (argc != 3)) {
fprintf(stderr, "usage: %s ecmfile [outputfile]\n", argv[0]);
return 1;
}
/*
** Verify that the input filename is valid
*/
infilename = argv[1];
if(strlen(infilename) < 5) {
fprintf(stderr, "filename '%s' is too short\n", infilename);
return 1;
}
if(strcasecmp(infilename + strlen(infilename) - 4, ".ecm")) {
fprintf(stderr, "filename must end in .ecm\n");
return 1;
}
/*
** Figure out what the output filename should be
*/
if(argc == 3) {
outfilename = argv[2];
} else {
outfilename = malloc(strlen(infilename) - 3);
if(!outfilename) abort();
memcpy(outfilename, infilename, strlen(infilename) - 4);
outfilename[strlen(infilename) - 4] = 0;
}
fprintf(stderr, "Decoding %s to %s.\n", infilename, outfilename);
/*
** Open both files
*/
fin = fopen(infilename, "rb");
if(!fin) {
perror(infilename);
return 1;
}
fout = fopen(outfilename, "wb");
if(!fout) {
perror(outfilename);
fclose(fin);
return 1;
}
/*
** Decode
*/
unecmify(fin, fout);
/*
** Close everything
*/
fclose(fout);
fclose(fin);
return 0;
}source d'informationauteur Aymon Fournier
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Avez-vous envisagé d'utiliser JNI au lieu de prendre la peine de faire la traduction de C à Java?
Votre meilleur pari est de réécrire le code.
Toute conversion automatisée serait, au mieux, de rendement, de qualité médiocre et difficile à maintenir le code.
Le C vision du monde ne se mélange pas bien avec le Java de voir le monde. Si vous voulez vraiment les compiler en une forme exécutable par Java, jetez un oeil à NestedVM - http://nestedvm.ibex.org/ - qui est un cross compilateur compilation pour un MIPS-dialecte qui peut ensuite être facilement "exécuter" en Java, soit par le biais de l'interprétation ou par la conversion réelle bytecode reflétant l'original MIPS-instructions.
Je recommande d'obtenir une version Java du code.
La question est de se demander "un outil?", voici donc un outil.
Merci de ne pas downvote juste parce que vous n'aimez pas les outils.
J'ai essayé un C-à-Java outil de conversion appelé "Novosoft C2J". Verdict:
J'ai réussi à convertir un fichier C avec peu de dépendances, mais il a dû "pré-traiter" par copier-coller le contenu de l'en-tête des fichiers d'en-têtes, parce que C2J ne me laisse pas le sélectionner .h les fichiers d'inclusion dans un projet.
Traduit le code est statique, avec d'étranges "nextlevel()" et "prevlevel()" appels.
Certains traduits code du travail manuel, par exemple:
UndefFcs.cisnan([...])Conclusion: Buggy outil, mais il se peut qu'il n'y a pas de meilleur outil.
J'ai réalisé que je n'ai jamais posté ma solution
Dans Android Activité:
Dans unecm.c ajouter: