+++ /dev/null
-/*
- Additional tools for Minizip
- Code: Xavier Roche '2004
- License: Same as ZLIB (www.gzip.org)
-*/
-
-/* Code */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "zlib.h"
-#include "unzip.h"
-
-#define READ_8(adr) ((unsigned char)*(adr))
-#define READ_16(adr) ( READ_8(adr) | (READ_8(adr+1) << 8) )
-#define READ_32(adr) ( READ_16(adr) | (READ_16((adr)+2) << 16) )
-
-#define WRITE_8(buff, n) do { \
- *((unsigned char*)(buff)) = (unsigned char) ((n) & 0xff); \
-} while(0)
-#define WRITE_16(buff, n) do { \
- WRITE_8((unsigned char*)(buff), n); \
- WRITE_8(((unsigned char*)(buff)) + 1, (n) >> 8); \
-} while(0)
-#define WRITE_32(buff, n) do { \
- WRITE_16((unsigned char*)(buff), (n) & 0xffff); \
- WRITE_16((unsigned char*)(buff) + 2, (n) >> 16); \
-} while(0)
-
-extern int ZEXPORT unzRepair(file, fileOut, fileOutTmp, nRecovered, bytesRecovered)
-const char* file;
-const char* fileOut;
-const char* fileOutTmp;
-uLong* nRecovered;
-uLong* bytesRecovered;
-{
- int err = Z_OK;
- FILE* fpZip = fopen(file, "rb");
- FILE* fpOut = fopen(fileOut, "wb");
- FILE* fpOutCD = fopen(fileOutTmp, "wb");
- if (fpZip != NULL && fpOut != NULL) {
- int entries = 0;
- uLong totalBytes = 0;
- char header[30];
- char filename[1024];
- char extra[1024];
- int offset = 0;
- int offsetCD = 0;
- while ( fread(header, 1, 30, fpZip) == 30 ) {
- int currentOffset = offset;
-
- /* File entry */
- if (READ_32(header) == 0x04034b50) {
- unsigned int version = READ_16(header + 4);
- unsigned int gpflag = READ_16(header + 6);
- unsigned int method = READ_16(header + 8);
- unsigned int filetime = READ_16(header + 10);
- unsigned int filedate = READ_16(header + 12);
- unsigned int crc = READ_32(header + 14); /* crc */
- unsigned int cpsize = READ_32(header + 18); /* compressed size */
- unsigned int uncpsize = READ_32(header + 22); /* uncompressed sz */
- unsigned int fnsize = READ_16(header + 26); /* file name length */
- unsigned int extsize = READ_16(header + 28); /* extra field length */
- filename[0] = extra[0] = '\0';
-
- /* Header */
- if (fwrite(header, 1, 30, fpOut) == 30) {
- offset += 30;
- } else {
- err = Z_ERRNO;
- break;
- }
-
- /* Filename */
- if (fnsize > 0) {
- if (fnsize < sizeof(filename)) {
- if (fread(filename, 1, fnsize, fpZip) == fnsize) {
- if (fwrite(filename, 1, fnsize, fpOut) == fnsize) {
- offset += fnsize;
- } else {
- err = Z_ERRNO;
- break;
- }
- } else {
- err = Z_ERRNO;
- break;
- }
- } else {
- err = Z_ERRNO;
- break;
- }
- } else {
- err = Z_STREAM_ERROR;
- break;
- }
-
- /* Extra field */
- if (extsize > 0) {
- if (extsize < sizeof(extra)) {
- if (fread(extra, 1, extsize, fpZip) == extsize) {
- if (fwrite(extra, 1, extsize, fpOut) == extsize) {
- offset += extsize;
- } else {
- err = Z_ERRNO;
- break;
- }
- } else {
- err = Z_ERRNO;
- break;
- }
- } else {
- err = Z_ERRNO;
- break;
- }
- }
-
- /* Data */
- {
- int dataSize = cpsize;
- if (dataSize == 0) {
- dataSize = uncpsize;
- }
- if (dataSize > 0) {
- char* data = malloc(dataSize);
- if (data != NULL) {
- if ((int)fread(data, 1, dataSize, fpZip) == dataSize) {
- if ((int)fwrite(data, 1, dataSize, fpOut) == dataSize) {
- offset += dataSize;
- totalBytes += dataSize;
- } else {
- err = Z_ERRNO;
- }
- } else {
- err = Z_ERRNO;
- }
- free(data);
- if (err != Z_OK) {
- break;
- }
- } else {
- err = Z_MEM_ERROR;
- break;
- }
- }
- }
-
- /* Central directory entry */
- {
- char header[46];
- char* comment = "";
- int comsize = (int) strlen(comment);
- WRITE_32(header, 0x02014b50);
- WRITE_16(header + 4, version);
- WRITE_16(header + 6, version);
- WRITE_16(header + 8, gpflag);
- WRITE_16(header + 10, method);
- WRITE_16(header + 12, filetime);
- WRITE_16(header + 14, filedate);
- WRITE_32(header + 16, crc);
- WRITE_32(header + 20, cpsize);
- WRITE_32(header + 24, uncpsize);
- WRITE_16(header + 28, fnsize);
- WRITE_16(header + 30, extsize);
- WRITE_16(header + 32, comsize);
- WRITE_16(header + 34, 0); /* disk # */
- WRITE_16(header + 36, 0); /* int attrb */
- WRITE_32(header + 38, 0); /* ext attrb */
- WRITE_32(header + 42, currentOffset);
- /* Header */
- if (fwrite(header, 1, 46, fpOutCD) == 46) {
- offsetCD += 46;
-
- /* Filename */
- if (fnsize > 0) {
- if (fwrite(filename, 1, fnsize, fpOutCD) == fnsize) {
- offsetCD += fnsize;
- } else {
- err = Z_ERRNO;
- break;
- }
- } else {
- err = Z_STREAM_ERROR;
- break;
- }
-
- /* Extra field */
- if (extsize > 0) {
- if (fwrite(extra, 1, extsize, fpOutCD) == extsize) {
- offsetCD += extsize;
- } else {
- err = Z_ERRNO;
- break;
- }
- }
-
- /* Comment field */
- if (comsize > 0) {
- if ((int)fwrite(comment, 1, comsize, fpOutCD) == comsize) {
- offsetCD += comsize;
- } else {
- err = Z_ERRNO;
- break;
- }
- }
-
-
- } else {
- err = Z_ERRNO;
- break;
- }
- }
-
- /* Success */
- entries++;
-
- } else {
- break;
- }
- }
-
- /* Final central directory */
- {
- int entriesZip = entries;
- char header[22];
- char* comment = ""; // "ZIP File recovered by zlib/minizip/mztools";
- int comsize = (int) strlen(comment);
- if (entriesZip > 0xffff) {
- entriesZip = 0xffff;
- }
- WRITE_32(header, 0x06054b50);
- WRITE_16(header + 4, 0); /* disk # */
- WRITE_16(header + 6, 0); /* disk # */
- WRITE_16(header + 8, entriesZip); /* hack */
- WRITE_16(header + 10, entriesZip); /* hack */
- WRITE_32(header + 12, offsetCD); /* size of CD */
- WRITE_32(header + 16, offset); /* offset to CD */
- WRITE_16(header + 20, comsize); /* comment */
-
- /* Header */
- if (fwrite(header, 1, 22, fpOutCD) == 22) {
-
- /* Comment field */
- if (comsize > 0) {
- if ((int)fwrite(comment, 1, comsize, fpOutCD) != comsize) {
- err = Z_ERRNO;
- }
- }
-
- } else {
- err = Z_ERRNO;
- }
- }
-
- /* Final merge (file + central directory) */
- fclose(fpOutCD);
- if (err == Z_OK) {
- fpOutCD = fopen(fileOutTmp, "rb");
- if (fpOutCD != NULL) {
- int nRead;
- char buffer[8192];
- while ( (nRead = (int)fread(buffer, 1, sizeof(buffer), fpOutCD)) > 0) {
- if ((int)fwrite(buffer, 1, nRead, fpOut) != nRead) {
- err = Z_ERRNO;
- break;
- }
- }
- fclose(fpOutCD);
- }
- }
-
- /* Close */
- fclose(fpZip);
- fclose(fpOut);
-
- /* Wipe temporary file */
- (void)remove(fileOutTmp);
-
- /* Number of recovered entries */
- if (err == Z_OK) {
- if (nRecovered != NULL) {
- *nRecovered = entries;
- }
- if (bytesRecovered != NULL) {
- *bytesRecovered = totalBytes;
- }
- }
- } else {
- err = Z_STREAM_ERROR;
- }
- return err;
-}
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