/*
*******************************************************************************
*
* Copyright (C) 2003-2007, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: icuswap.cpp
* encoding: US-ASCII
* tab size: 8 (not used)
* indentation:4
*
* created on: 2003aug08
* created by: Markus W. Scherer
*
* This tool takes an ICU data file and "swaps" it, that is, changes its
* platform properties between big-/little-endianness and ASCII/EBCDIC charset
* families.
* The modified data file is written to a new file.
* Useful as an install-time tool for shipping only one flavor of ICU data
* and preparing data files for the target platform.
* Will not work with data DLLs (shared libraries).
*/
#include "unicode/utypes.h"
#include "unicode/putil.h"
#include "unicode/udata.h"
#include "cmemory.h"
#include "cstring.h"
#include "uinvchar.h"
#include "uarrsort.h"
#include "ucmndata.h"
#include "udataswp.h"
#include "swapimpl.h"
#include "toolutil.h"
#include "uoptions.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* definitions */
#define LENGTHOF(array) (int32_t)(sizeof(array)/sizeof((array)[0]))
#define DEFAULT_PADDING_LENGTH 15
static UOption options[]={
UOPTION_HELP_H,
UOPTION_HELP_QUESTION_MARK,
UOPTION_DEF("type", 't', UOPT_REQUIRES_ARG)
};
enum {
OPT_HELP_H,
OPT_HELP_QUESTION_MARK,
OPT_OUT_TYPE
};
static int32_t
fileSize(FILE *f) {
int32_t size;
fseek(f, 0, SEEK_END);
size=(int32_t)ftell(f);
fseek(f, 0, SEEK_SET);
return size;
}
/**
* Swap an ICU .dat package, including swapping of enclosed items.
*/
U_CFUNC int32_t U_CALLCONV
udata_swapPackage(const char *inFilename, const char *outFilename,
const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode);
U_CDECL_BEGIN
static void U_CALLCONV
printError(void *context, const char *fmt, va_list args) {
vfprintf((FILE *)context, fmt, args);
}
U_CDECL_END
static int
printUsage(const char *pname, UBool ishelp) {
fprintf(stderr,
"%csage: %s [ -h, -?, --help ] -tl|-tb|-te|--type=b|... infilename outfilename\n",
ishelp ? 'U' : 'u', pname);
if(ishelp) {
fprintf(stderr,
"\nOptions: -h, -?, --help print this message and exit\n"
" Read the input file, swap its platform properties according\n"
" to the -t or --type option, and write the result to the output file.\n"
" -tl change to little-endian/ASCII charset family\n"
" -tb change to big-endian/ASCII charset family\n"
" -te change to big-endian/EBCDIC charset family\n");
}
return !ishelp;
}
extern int
main(int argc, char *argv[]) {
FILE *in, *out;
const char *pname;
char *data;
int32_t length;
UBool ishelp;
int rc;
UDataSwapper *ds;
const UDataInfo *pInfo;
UErrorCode errorCode;
uint8_t outCharset;
UBool outIsBigEndian;
U_MAIN_INIT_ARGS(argc, argv);
fprintf(stderr, "Warning: icuswap is an obsolete tool and it will be removed in the next ICU release.\nPlease use the icupkg tool instead.\n");
/* get the program basename */
pname=strrchr(argv[0], U_FILE_SEP_CHAR);
if(pname==NULL) {
pname=strrchr(argv[0], '/');
}
if(pname!=NULL) {
++pname;
} else {
pname=argv[0];
}
argc=u_parseArgs(argc, argv, LENGTHOF(options), options);
ishelp=options[OPT_HELP_H].doesOccur || options[OPT_HELP_QUESTION_MARK].doesOccur;
if(ishelp || argc!=3) {
return printUsage(pname, ishelp);
}
/* parse the output type option */
data=(char *)options[OPT_OUT_TYPE].value;
if(data[0]==0 || data[1]!=0) {
/* the type must be exactly one letter */
return printUsage(pname, FALSE);
}
switch(data[0]) {
case 'l':
outIsBigEndian=FALSE;
outCharset=U_ASCII_FAMILY;
break;
case 'b':
outIsBigEndian=TRUE;
outCharset=U_ASCII_FAMILY;
break;
case 'e':
outIsBigEndian=TRUE;
outCharset=U_EBCDIC_FAMILY;
break;
default:
return printUsage(pname, FALSE);
}
in=out=NULL;
data=NULL;
/* open the input file, get its length, allocate memory for it, read the file */
in=fopen(argv[1], "rb");
if(in==NULL) {
fprintf(stderr, "%s: unable to open input file \"%s\"\n", pname, argv[1]);
rc=2;
goto done;
}
length=fileSize(in);
if(length<DEFAULT_PADDING_LENGTH) {
fprintf(stderr, "%s: empty input file \"%s\"\n", pname, argv[1]);
rc=2;
goto done;
}
/*
* +15: udata_swapPackage() may need to add a few padding bytes to the
* last item if charset swapping is done,
* because the last item may be resorted into the middle and then needs
* additional padding bytes
*/
data=(char *)malloc(length+DEFAULT_PADDING_LENGTH);
if(data==NULL) {
fprintf(stderr, "%s: error allocating memory for \"%s\"\n", pname, argv[1]);
rc=2;
goto done;
}
/* set the last 15 bytes to the usual padding byte, see udata_swapPackage() */
uprv_memset(data+length-DEFAULT_PADDING_LENGTH, 0xaa, DEFAULT_PADDING_LENGTH);
if(length!=(int32_t)fread(data, 1, length, in)) {
fprintf(stderr, "%s: error reading \"%s\"\n", pname, argv[1]);
rc=3;
goto done;
}
fclose(in);
in=NULL;
/* swap the data in-place */
errorCode=U_ZERO_ERROR;
ds=udata_openSwapperForInputData(data, length, outIsBigEndian, outCharset, &errorCode);
if(U_FAILURE(errorCode)) {
fprintf(stderr, "%s: udata_openSwapperForInputData(\"%s\") failed - %s\n",
pname, argv[1], u_errorName(errorCode));
rc=4;
goto done;
}
ds->printError=printError;
ds->printErrorContext=stderr;
/* speculative cast, protected by the following length check */
pInfo=(const UDataInfo *)((const char *)data+4);
if( length>=20 &&
pInfo->dataFormat[0]==0x43 && /* dataFormat="CmnD" */
pInfo->dataFormat[1]==0x6d &&
pInfo->dataFormat[2]==0x6e &&
pInfo->dataFormat[3]==0x44
) {
/*
* swap the .dat package
* udata_swapPackage() needs to rename ToC name entries from the old package
* name to the new one.
* We pass it the filenames, and udata_swapPackage() will extract the
* package names.
*/
length=udata_swapPackage(argv[1], argv[2], ds, data, length, data, &errorCode);
udata_closeSwapper(ds);
if(U_FAILURE(errorCode)) {
fprintf(stderr, "%s: udata_swapPackage(\"%s\") failed - %s\n",
pname, argv[1], u_errorName(errorCode));
rc=4;
goto done;
}
} else {
/* swap the data, which is not a .dat package */
length=udata_swap(ds, data, length, data, &errorCode);
udata_closeSwapper(ds);
if(U_FAILURE(errorCode)) {
fprintf(stderr, "%s: udata_swap(\"%s\") failed - %s\n",
pname, argv[1], u_errorName(errorCode));
rc=4;
goto done;
}
}
out=fopen(argv[2], "wb");
if(out==NULL) {
fprintf(stderr, "%s: unable to open output file \"%s\"\n", pname, argv[2]);
rc=5;
goto done;
}
if(length!=(int32_t)fwrite(data, 1, length, out)) {
fprintf(stderr, "%s: error writing \"%s\"\n", pname, argv[2]);
rc=6;
goto done;
}
fclose(out);
out=NULL;
/* all done */
rc=0;
done:
if(in!=NULL) {
fclose(in);
}
if(out!=NULL) {
fclose(out);
}
if(data!=NULL) {
free(data);
}
return rc;
}
/* swap .dat package files -------------------------------------------------- */
static int32_t
extractPackageName(const UDataSwapper *ds, const char *filename,
char pkg[], int32_t capacity,
UErrorCode *pErrorCode) {
const char *basename;
int32_t len;
if(U_FAILURE(*pErrorCode)) {
return 0;
}
basename=findBasename(filename);
len=(int32_t)uprv_strlen(basename)-4; /* -4: subtract the length of ".dat" */
if(len<=0 || 0!=uprv_strcmp(basename+len, ".dat")) {
udata_printError(ds, "udata_swapPackage(): \"%s\" is not recognized as a package filename (must end with .dat)\n",
basename);
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
if(len>=capacity) {
udata_printError(ds, "udata_swapPackage(): the package name \"%s\" is too long (>=%ld)\n",
(long)capacity);
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
uprv_memcpy(pkg, basename, len);
pkg[len]=0;
return len;
}
struct ToCEntry {
uint32_t nameOffset, inOffset, outOffset, length;
};
U_CDECL_BEGIN
static int32_t U_CALLCONV
compareToCEntries(const void *context, const void *left, const void *right) {
const char *chars=(const char *)context;
return (int32_t)uprv_strcmp(chars+((const ToCEntry *)left)->nameOffset,
chars+((const ToCEntry *)right)->nameOffset);
}
U_CDECL_END
U_CFUNC int32_t U_CALLCONV
udata_swapPackage(const char *inFilename, const char *outFilename,
const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode) {
const UDataInfo *pInfo;
int32_t headerSize;
const uint8_t *inBytes;
uint8_t *outBytes;
uint32_t itemCount, offset, i;
int32_t itemLength;
const UDataOffsetTOCEntry *inEntries;
UDataOffsetTOCEntry *outEntries;
ToCEntry *table;
char inPkgName[32], outPkgName[32];
int32_t inPkgNameLength, outPkgNameLength;
/* udata_swapDataHeader checks the arguments */
headerSize=udata_swapDataHeader(ds, inData, length, outData, pErrorCode);
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
return 0;
}
/* check data format and format version */
pInfo=(const UDataInfo *)((const char *)inData+4);
if(!(
pInfo->dataFormat[0]==0x43 && /* dataFormat="CmnD" */
pInfo->dataFormat[1]==0x6d &&
pInfo->dataFormat[2]==0x6e &&
pInfo->dataFormat[3]==0x44 &&
pInfo->formatVersion[0]==1
)) {
udata_printError(ds, "udata_swapPackage(): data format %02x.%02x.%02x.%02x (format version %02x) is not recognized as an ICU .dat package\n",
pInfo->dataFormat[0], pInfo->dataFormat[1],
pInfo->dataFormat[2], pInfo->dataFormat[3],
pInfo->formatVersion[0]);
*pErrorCode=U_UNSUPPORTED_ERROR;
return 0;
}
/*
* We need to change the ToC name entries so that they have the correct
* package name prefix.
* Extract the package names from the in/out filenames.
*/
inPkgNameLength=extractPackageName(
ds, inFilename,
inPkgName, (int32_t)sizeof(inPkgName),
pErrorCode);
outPkgNameLength=extractPackageName(
ds, outFilename,
outPkgName, (int32_t)sizeof(outPkgName),
pErrorCode);
if(U_FAILURE(*pErrorCode)) {
return 0;
}
/*
* It is possible to work with inPkgNameLength!=outPkgNameLength,
* but then the length of the data file would change more significantly,
* which we are not currently prepared for.
*/
if(inPkgNameLength!=outPkgNameLength) {
udata_printError(ds, "udata_swapPackage(): the package names \"%s\" and \"%s\" must have the same length\n",
inPkgName, outPkgName);
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
inBytes=(const uint8_t *)inData+headerSize;
inEntries=(const UDataOffsetTOCEntry *)(inBytes+4);
if(length<0) {
/* preflighting */
itemCount=ds->readUInt32(*(const uint32_t *)inBytes);
if(itemCount==0) {
/* no items: count only the item count and return */
return headerSize+4;
}
/* read the last item's offset and preflight it */
offset=ds->readUInt32(inEntries[itemCount-1].dataOffset);
itemLength=udata_swap(ds, inBytes+offset, -1, NULL, pErrorCode);
if(U_SUCCESS(*pErrorCode)) {
return headerSize+offset+(uint32_t)itemLength;
} else {
return 0;
}
} else {
/* check that the itemCount fits, then the ToC table, then at least the header of the last item */
length-=headerSize;
if(length<4) {
/* itemCount does not fit */
offset=0xffffffff;
itemCount=0; /* make compilers happy */
} else {
itemCount=ds->readUInt32(*(const uint32_t *)inBytes);
if(itemCount==0) {
offset=4;
} else if((uint32_t)length<(4+8*itemCount)) {
/* ToC table does not fit */
offset=0xffffffff;
} else {
/* offset of the last item plus at least 20 bytes for its header */
offset=20+ds->readUInt32(inEntries[itemCount-1].dataOffset);
}
}
if((uint32_t)length<offset) {
udata_printError(ds, "udata_swapPackage(): too few bytes (%d after header) for a .dat package\n",
length);
*pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
return 0;
}
outBytes=(uint8_t *)outData+headerSize;
/* swap the item count */
ds->swapArray32(ds, inBytes, 4, outBytes, pErrorCode);
if(itemCount==0) {
/* no items: just return now */
return headerSize+4;
}
/* swap the item name strings */
offset=4+8*itemCount;
itemLength=(int32_t)(ds->readUInt32(inEntries[0].dataOffset)-offset);
udata_swapInvStringBlock(ds, inBytes+offset, itemLength, outBytes+offset, pErrorCode);
if(U_FAILURE(*pErrorCode)) {
udata_printError(ds, "udata_swapPackage() failed to swap the data item name strings\n");
return 0;
}
/* keep offset and itemLength in case we allocate and copy the strings below */
/* swap the package names into the output charset */
if(ds->outCharset!=U_CHARSET_FAMILY) {
UDataSwapper *ds2;
ds2=udata_openSwapper(TRUE, U_CHARSET_FAMILY, TRUE, ds->outCharset, pErrorCode);
ds2->swapInvChars(ds2, inPkgName, inPkgNameLength, inPkgName, pErrorCode);
ds2->swapInvChars(ds2, outPkgName, outPkgNameLength, outPkgName, pErrorCode);
udata_closeSwapper(ds2);
if(U_FAILURE(*pErrorCode)) {
udata_printError(ds, "udata_swapPackage() failed to swap the input/output package names\n");
}
}
/* change the prefix of each ToC entry name from the old to the new package name */
{
char *entryName;
for(i=0; i<itemCount; ++i) {
entryName=(char *)inBytes+ds->readUInt32(inEntries[i].nameOffset);
if(0==uprv_memcmp(entryName, inPkgName, inPkgNameLength)) {
uprv_memcpy(entryName, outPkgName, inPkgNameLength);
} else {
udata_printError(ds, "udata_swapPackage() failed: ToC item %ld does not have the input package name as a prefix\n",
(long)i);
*pErrorCode=U_INVALID_FORMAT_ERROR;
return 0;
}
}
}
/*
* Allocate the ToC table and, if necessary, a temporary buffer for
* pseudo-in-place swapping.
*
* We cannot swap in-place because:
*
* 1. If the swapping of an item fails mid-way, then in-place swapping
* has destroyed its data.
* Out-of-place swapping allows us to then copy its original data.
*
* 2. If swapping changes the charset family, then we must resort
* not only the ToC table but also the data items themselves.
* This requires a permutation and is best done with separate in/out
* buffers.
*
* We swapped the strings above to avoid the malloc below if string swapping fails.
*/
if(inData==outData) {
/* +15: prepare for extra padding of a newly-last item */
table=(ToCEntry *)uprv_malloc(itemCount*sizeof(ToCEntry)+length+DEFAULT_PADDING_LENGTH);
if(table!=NULL) {
outBytes=(uint8_t *)(table+itemCount);
/* copy the item count and the swapped strings */
uprv_memcpy(outBytes, inBytes, 4);
uprv_memcpy(outBytes+offset, inBytes+offset, itemLength);
}
} else {
table=(ToCEntry *)uprv_malloc(itemCount*sizeof(ToCEntry));
}
if(table==NULL) {
udata_printError(ds, "udata_swapPackage(): out of memory allocating %d bytes\n",
inData==outData ?
itemCount*sizeof(ToCEntry)+length+DEFAULT_PADDING_LENGTH :
itemCount*sizeof(ToCEntry));
*pErrorCode=U_MEMORY_ALLOCATION_ERROR;
return 0;
}
outEntries=(UDataOffsetTOCEntry *)(outBytes+4);
/* read the ToC table */
for(i=0; i<itemCount; ++i) {
table[i].nameOffset=ds->readUInt32(inEntries[i].nameOffset);
table[i].inOffset=ds->readUInt32(inEntries[i].dataOffset);
if(i>0) {
table[i-1].length=table[i].inOffset-table[i-1].inOffset;
}
}
table[itemCount-1].length=(uint32_t)length-table[itemCount-1].inOffset;
if(ds->inCharset==ds->outCharset) {
/* no charset swapping, no resorting: keep item offsets the same */
for(i=0; i<itemCount; ++i) {
table[i].outOffset=table[i].inOffset;
}
} else {
/* charset swapping: resort items by their swapped names */
/*
* Before the actual sorting, we need to make sure that each item
* has a length that is a multiple of 16 bytes so that all items
* are 16-aligned.
* Only the old last item may be missing up to 15 padding bytes.
* Add padding bytes for it.
* Since the icuswap main() function has already allocated enough
* input buffer space and set the last 15 bytes there to 0xaa,
* we only need to increase the total data length and the length
* of the last item here.
*/
if((length&0xf)!=0) {
int32_t delta=16-(length&0xf);
length+=delta;
table[itemCount-1].length+=(uint32_t)delta;
}
/* Save the offset before we sort the TOC. */
offset=table[0].inOffset;
/* sort the TOC entries */
uprv_sortArray(table, (int32_t)itemCount, (int32_t)sizeof(ToCEntry),
compareToCEntries, outBytes, FALSE, pErrorCode);
/*
* Note: Before sorting, the inOffset values were in order.
* Now the outOffset values are in order.
*/
/* assign outOffset values */
for(i=0; i<itemCount; ++i) {
table[i].outOffset=offset;
offset+=table[i].length;
}
}
/* write the output ToC table */
for(i=0; i<itemCount; ++i) {
ds->writeUInt32(&outEntries[i].nameOffset, table[i].nameOffset);
ds->writeUInt32(&outEntries[i].dataOffset, table[i].outOffset);
}
/* swap each data item */
for(i=0; i<itemCount; ++i) {
/* first copy the item bytes to make sure that unreachable bytes are copied */
uprv_memcpy(outBytes+table[i].outOffset, inBytes+table[i].inOffset, table[i].length);
/* swap the item */
udata_swap(ds, inBytes+table[i].inOffset, (int32_t)table[i].length,
outBytes+table[i].outOffset, pErrorCode);
if(U_FAILURE(*pErrorCode)) {
if(ds->outCharset==U_CHARSET_FAMILY) {
udata_printError(ds, "warning: udata_swapPackage() failed to swap item \"%s\"\n"
" at inOffset 0x%x length 0x%x - %s\n"
" the data item will be copied, not swapped\n\n",
(char *)outBytes+table[i].nameOffset,
table[i].inOffset, table[i].length, u_errorName(*pErrorCode));
} else {
udata_printError(ds, "warning: udata_swapPackage() failed to swap an item\n"
" at inOffset 0x%x length 0x%x - %s\n"
" the data item will be copied, not swapped\n\n",
table[i].inOffset, table[i].length, u_errorName(*pErrorCode));
}
/* reset the error code, copy the data item, and continue */
*pErrorCode=U_ZERO_ERROR;
uprv_memcpy(outBytes+table[i].outOffset, inBytes+table[i].inOffset, table[i].length);
}
}
if(inData==outData) {
/* copy the data from the temporary buffer to the in-place buffer */
uprv_memcpy((uint8_t *)outData+headerSize, outBytes, length);
}
uprv_free(table);
return headerSize+length;
}
}
/*
* Hey, Emacs, please set the following:
*
* Local Variables:
* indent-tabs-mode: nil
* End:
*
*/