有什么工具可以将C代码转换成Java代码吗？我有兴趣将此代码转换为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#include #include /***************************************************************************/ 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; }
James McNell.. 13
最好的办法是重写代码.
任何自动转换最多都会产生质量差且难以维护的代码.
最好的办法是重写代码.
任何自动转换最多都会产生质量差且难以维护的代码.
世界的C视图与世界的Java视图并不完美.如果您真的想要编译为Java可执行的表单,请查看NestedVM - http://nestedvm.ibex.org/ - 这是一个编译为MIPS方言的交叉编译器,然后可以轻松地"运行" Java可以通过解释或转换为反映原始MIPS指令的实际字节码.
我建议获得Java版本的代码.
曾经有一些名为Ephedra,Convert2Java和C2J ++的工具.但它们并没有真正起作用,不再可用.这使得三家公司在无法使用,有用和良好的范围内提供自动C到Java的翻译:
Novosoft,C2J:创建的Java代码需要认真的手动工作.C2J创建了一些不可读的代码(具有非常有限的指针支持)并且不支持无符号类型/ goto语句/本机库/宏/注释/ ...
有形软件解决方案,C++ 2Java:创建的Java代码需要一些手动工作.C++ 2Java不支持指针/无符号类型/ goto语句/本机库/宏/ ...(Sachin Bhansali发布了上面的uncm C代码的翻译)
mtSystems,Coot:创建功能等效的代码(通过完全支持指针,函数指针,无符号类型,goto语句,本机库,......)和可读代码(保留宏/注释,重命名标识符,应用各种优化,... ).
这里是mtSystems创建的类(未改变):
import static ch.mtsystems.coot.String8.cs8;
import static ch.mtsystems.coot.String8.nnc;
import ch.mtsystems.coot.String8;
import java.io.IOException;
import java.io.RandomAccessFile;
public class Unecm {
public static void banner() {
System.err.println("UNECM - Decoder for Error Code Modeler format v1.0\nCopyright (C) 2002 Neill Corlett\n");
}
/**
* LUTs used for computing ECC/EDC
*/
private static byte[] eccFLut_U = new byte[256];
private static byte[] eccBLut_U = new byte[256];
private static int[] edcLut_U = new int[256];
/**
* Init routine
*/
private static void eccedcInit() {
int j_U, edc_U;
for(int i_U = 0; Integer.compareUnsigned(i_U, 256) < 0; i_U++) {
j_U = i_U << 1 ^ ((i_U & 0x80) != 0 ? 0x11D : 0);
eccFLut_U[i_U] = (byte)j_U;
eccBLut_U[i_U ^ j_U] = (byte)i_U;
edc_U = i_U;
for(j_U = 0; Integer.compareUnsigned(j_U, 8) < 0; j_U++) {
edc_U = edc_U >>> 1 ^ ((edc_U & 1) != 0 ? 0xD8018001 : 0);
}
edcLut_U[i_U] = edc_U;
}
}
/**
* Compute EDC for a block
*/
public static int edcPartialComputeblock_U(int edc_U, String8 src_U, short size_U) {
while(size_U-- != 0) {
edc_U = edc_U >>> 8 ^ edcLut_U[(edc_U ^ Byte.toUnsignedInt((src_U = nnc(src_U).shift(1)).get(-1))) & 0xFF];
}
return edc_U;
}
public static void edcComputeblock(String8 src_U, short size_U, String8 dest_U) {
int edc_U = edcPartialComputeblock_U(0, src_U, size_U);
dest_U.set(0, (byte)(edc_U >>> 0 & 0xFF));
dest_U.set(1, (byte)(edc_U >>> 8 & 0xFF));
dest_U.set(2, (byte)(edc_U >>> 16 & 0xFF));
dest_U.set(3, (byte)(edc_U >>> 24 & 0xFF));
}
/**
* Compute ECC for a block (can do either P or Q)
*/
private static void eccComputeblock(String8 src_U, int majorCount_U, int minorCount_U, int majorMult_U, int minorInc_U, String8 dest_U) {
int size_U = majorCount_U * minorCount_U;
for(int major_U = 0; Integer.compareUnsigned(major_U, majorCount_U) < 0; major_U++) {
int index_U = (major_U >>> 1) * majorMult_U + (major_U & 1);
byte eccA_U = 0;
byte eccB_U = 0;
for(int minor_U = 0; Integer.compareUnsigned(minor_U, minorCount_U) < 0; minor_U++) {
byte temp_U = src_U.get(index_U);
index_U += minorInc_U;
if(Integer.compareUnsigned(index_U, size_U) >= 0) {
index_U -= size_U;
}
eccA_U = (byte)(Byte.toUnsignedInt(eccA_U) ^ Byte.toUnsignedInt(temp_U));
eccB_U = (byte)(Byte.toUnsignedInt(eccB_U) ^ Byte.toUnsignedInt(temp_U));
eccA_U = eccFLut_U[Byte.toUnsignedInt(eccA_U)];
}
eccA_U = eccBLut_U[Byte.toUnsignedInt(eccFLut_U[Byte.toUnsignedInt(eccA_U)]) ^ Byte.toUnsignedInt(eccB_U)];
dest_U.set(major_U, eccA_U);
dest_U.set(major_U + majorCount_U, (byte)(Byte.toUnsignedInt(eccA_U) ^ Byte.toUnsignedInt(eccB_U)));
}
}
/**
* Generate ECC P and Q codes for a block
*/
private static void eccGenerate(String8 sector_U, int zeroaddress) {
byte[] address_U = new byte[4];
/* Save the address and zero it out */
if(zeroaddress != 0) {
for(byte i_U = 0; Byte.toUnsignedInt(i_U) < 4; i_U++) {
address_U[Byte.toUnsignedInt(i_U)] = sector_U.get(12 + Byte.toUnsignedInt(i_U));
sector_U.set(12 + Byte.toUnsignedInt(i_U), (byte)0);
}
}
/* Compute ECC P code */
eccComputeblock(nnc(sector_U).shift(0xC), 86, 24, 2, 86, nnc(sector_U).shift(0x81C));
/* Compute ECC Q code */
eccComputeblock(nnc(sector_U).shift(0xC), 52, 43, 86, 88, nnc(sector_U).shift(0x8C8));
/* Restore the address */
if(zeroaddress != 0) {
for(byte i_U = 0; Byte.toUnsignedInt(i_U) < 4; i_U++) {
sector_U.set(12 + Byte.toUnsignedInt(i_U), address_U[Byte.toUnsignedInt(i_U)]);
}
}
}
/**
* Generate ECC/EDC information for a sector (must be 2352 = 0x930 bytes)
* Returns 0 on success
*/
public static void eccedcGenerate(String8 sector_U, int type) {
switch(type) {
case 1: /* Mode 1 */
/* Compute EDC */
edcComputeblock(nnc(sector_U).shift(0x00), (short)0x810, nnc(sector_U).shift(0x810));
/* Write out zero bytes */
for(int i_U = 0; Integer.compareUnsigned(i_U, 8) < 0; i_U++) {
sector_U.set(0x814 + i_U, (byte)0);
}
/* Generate ECC P/Q codes */
eccGenerate(sector_U, 0);
break;
case 2: /* Mode 2 form 1 */
/* Compute EDC */
edcComputeblock(nnc(sector_U).shift(0x10), (short)0x808, nnc(sector_U).shift(0x818));
/* Generate ECC P/Q codes */
eccGenerate(sector_U, 1);
break;
case 3: /* Mode 2 form 2 */
/* Compute EDC */
edcComputeblock(nnc(sector_U).shift(0x10), (short)0x91C, nnc(sector_U).shift(0x92C));
break;
}
}
public static int mycounter_U;
public static int mycounterTotal_U;
public static void resetcounter(int total_U) {
mycounter_U = 0;
mycounterTotal_U = total_U;
}
public static void setcounter(int n_U) {
if(n_U >>> 20 != mycounter_U >>> 20) {
int a_U = Integer.divideUnsigned(n_U + 64, 128);
int d_U = Integer.divideUnsigned(mycounterTotal_U + 64, 128);
if(d_U == 0) {
d_U = 1;
}
System.err.printf("Decoding (%02d%%)\r", Integer.divideUnsigned(100 * a_U, d_U));
}
mycounter_U = n_U;
}
public static int unecmify(RandomAccessFile in, RandomAccessFile out) throws IOException {
final int posUneof = 1, posCorrupt = 2;
positionLoop:
for(int pos = 0; true;) switch(pos) {
default:
int checkedc_U = 0;
String8 sector_U = new String8(2_352);
int type_U;
int num_U;
in.seek(in.length());
resetcounter((int)in.getFilePointer());
in.seek(0);
if(in.read() != 'E' || in.read() != 'C' || in.read() != 'M' || in.read() != 0x00) {
System.err.println("Header not found!");
pos = posCorrupt;
continue positionLoop;
}
for(;;) {
int c = in.read();
int bits = 5;
if(c == -1) {
pos = posUneof;
continue positionLoop;
}
type_U = c & 3;
num_U = c >> 2 & 0x1F;
while((c & 0x80) != 0) {
c = in.read();
if(c == -1) {
pos = posUneof;
continue positionLoop;
}
num_U |= (c & 0x7F) << bits;
bits += 7;
}
if(num_U == 0xFFFFFFFF) {
break;
}
num_U++;
if(Integer.compareUnsigned(num_U, 0x80000000) >= 0) {
pos = posCorrupt;
continue positionLoop;
}
if(type_U == 0) {
while(num_U != 0) {
int b = num_U;
if(b > 2_352) {
b = 2_352;
}
byte[] tmpBuf = new byte[b];
int readCount = Math.max(in.read(tmpBuf), 0);
sector_U.copyFrom(tmpBuf, readCount);
if(readCount != b) {
pos = posUneof;
continue positionLoop;
}
checkedc_U = edcPartialComputeblock_U(checkedc_U, sector_U, (short)b);
byte[] tmpBuf2 = new byte[b];
sector_U.copyTo(tmpBuf2);
out.write(tmpBuf2);
num_U -= b;
setcounter((int)in.getFilePointer());
}
} else {
while(num_U-- != 0) {
sector_U.fill(0, sector_U.size(), (byte)0);
sector_U.shift(1).fill(0, 10, (byte)0xFF);
switch(type_U) {
case 1:
sector_U.set(0x0F, (byte)0x01);
byte[] tmpBuf = new byte[0x003];
int readCount = Math.max(in.read(tmpBuf), 0);
nnc(sector_U.shift(0x00C)).copyFrom(tmpBuf, readCount);
if(readCount != 0x003) {
pos = posUneof;
continue positionLoop;
}
byte[] tmpBuf2 = new byte[0x800];
int readCount2 = Math.max(in.read(tmpBuf2), 0);
nnc(sector_U.shift(0x010)).copyFrom(tmpBuf2, readCount2);
if(readCount2 != 0x800) {
pos = posUneof;
continue positionLoop;
}
eccedcGenerate(sector_U, 1);
checkedc_U = edcPartialComputeblock_U(checkedc_U, sector_U, (short)2_352);
byte[] tmpBuf3 = new byte[2_352];
sector_U.copyTo(tmpBuf3);
out.write(tmpBuf3);
setcounter((int)in.getFilePointer());
break;
case 2:
sector_U.set(0x0F, (byte)0x02);
byte[] tmpBuf4 = new byte[0x804];
int readCount3 = Math.max(in.read(tmpBuf4), 0);
nnc(sector_U.shift(0x014)).copyFrom(tmpBuf4, readCount3);
if(readCount3 != 0x804) {
pos = posUneof;
continue positionLoop;
}
sector_U.set(0x10, sector_U.get(0x14));
sector_U.set(0x11, sector_U.get(0x15));
sector_U.set(0x12, sector_U.get(0x16));
sector_U.set(0x13, sector_U.get(0x17));
eccedcGenerate(sector_U, 2);
checkedc_U = edcPartialComputeblock_U(checkedc_U, sector_U.shift(0x10), (short)2_336);
byte[] tmpBuf5 = new byte[2_336];
sector_U.shift(0x10).copyTo(tmpBuf5);
out.write(tmpBuf5);
setcounter((int)in.getFilePointer());
break;
case 3:
sector_U.set(0x0F, (byte)0x02);
byte[] tmpBuf6 = new byte[0x918];
int readCount4 = Math.max(in.read(tmpBuf6), 0);
nnc(sector_U.shift(0x014)).copyFrom(tmpBuf6, readCount4);
if(readCount4 != 0x918) {
pos = posUneof;
continue positionLoop;
}
sector_U.set(0x10, sector_U.get(0x14));
sector_U.set(0x11, sector_U.get(0x15));
sector_U.set(0x12, sector_U.get(0x16));
sector_U.set(0x13, sector_U.get(0x17));
eccedcGenerate(sector_U, 3);
checkedc_U = edcPartialComputeblock_U(checkedc_U, sector_U.shift(0x10), (short)2_336);
byte[] tmpBuf7 = new byte[2_336];
sector_U.shift(0x10).copyTo(tmpBuf7);
out.write(tmpBuf7);
setcounter((int)in.getFilePointer());
break;
}
}
}
}
byte[] tmpBuf = new byte[4];
int readCount = Math.max(in.read(tmpBuf), 0);
sector_U.copyFrom(tmpBuf, readCount);
if(readCount != 4) {
pos = posUneof;
continue positionLoop;
}
System.err.println("Decoded " + in.getFilePointer() + " bytes -> " + out.getFilePointer() + " bytes");
if(Byte.toUnsignedInt(sector_U.get(0)) != (checkedc_U >>> 0 & 0xFF) || Byte.toUnsignedInt(sector_U.get(1)) != (checkedc_U >>> 8 & 0xFF) || Byte.toUnsignedInt(sector_U.get(2)) != (checkedc_U >>> 16 & 0xFF) || Byte.toUnsignedInt(sector_U.get(3)) != (checkedc_U >>> 24 & 0xFF)) {
System.err.printf("EDC error (%08X, should be %02X%02X%02X%02X)\n", checkedc_U, Byte.toUnsignedInt(sector_U.get(3)), Byte.toUnsignedInt(sector_U.get(2)), Byte.toUnsignedInt(sector_U.get(1)), Byte.toUnsignedInt(sector_U.get(0)));
pos = posCorrupt;
continue positionLoop;
}
System.err.println("Done; file is OK");
return 0;
case posUneof:
System.err.println("Unexpected EOF!");
case posCorrupt:
System.err.println("Corrupt ECM file!");
return 1;
}
}
public static void main(String[] args) throws IOException {
RandomAccessFile fin, fout;
String8 infilename;
String8 outfilename;
banner();
/*
** Initialize the ECC/EDC tables
*/
eccedcInit();
/*
** Check command line
*/
if(args.length != 1 && args.length != 2) {
System.err.println("usage: " + Unecm.class.getSimpleName() + " ecmfile [outputfile]");
System.exit(1);
}
/*
** Verify that the input filename is valid
*/
infilename = cs8(args[0]);
if(Integer.compareUnsigned(infilename.length(), 5) < 0) {
System.err.println("filename '" + infilename + "' is too short");
System.exit(1);
}
if(!nnc(infilename).shift(infilename.length() - 4).equalsIgnoreCase(".ecm")) {
System.err.println("filename must end in .ecm");
System.exit(1);
}
/*
** Figure out what the output filename should be
*/
if(args.length == 2) {
outfilename = cs8(args[1]);
} else {
outfilename = new String8(true, infilename.length() - 3);
nnc(outfilename).copyFrom(infilename, infilename.length() - 4);
outfilename.set(infilename.length() - 4, (byte)0);
}
System.err.println("Decoding " + infilename + " to " + outfilename + ".");
/*
** Open both files
*/
try {
fin = new RandomAccessFile(infilename.toString(), "r");
} catch(IOException ex) {
fin = null;
ex.printStackTrace();
System.exit(1);
}
try {
fout = new RandomAccessFile(outfilename.toString(), "rw");
fout.setLength(0);
} catch(IOException ex) {
fout = null;
ex.printStackTrace();
fin.close();
System.exit(1);
}
/*
** Decode
*/
unecmify(fin, fout);
/*
** Close everything
*/
fout.close();
fin.close();
}
}
您是否考虑过使用JNI而不是费心去做从C到Java的翻译？
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