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Merge pull request #1844 from AhmedAbdellah19/adding_read_files_from_file_feature
Adding --file=FILE feature
This commit is contained in:
Yann Collet
GitHub
222
programs/util.c
222
programs/util.c
@ -187,6 +187,228 @@ U64 UTIL_getTotalFileSize(const char* const * const fileNamesTable, unsigned nbF
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return error ? UTIL_FILESIZE_UNKNOWN : total;
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}
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int UTIL_readLineFromFile(char* buf, size_t len, FILE* file) {
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char* fgetsCheck = NULL;
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if (feof(file)) {
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UTIL_DISPLAYLEVEL(1, "[ERROR] end of file reached and need to read\n");
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return -1;
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}
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fgetsCheck = fgets(buf, (int) len, file);
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if(fgetsCheck == NULL || fgetsCheck != buf) {
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UTIL_DISPLAYLEVEL(1, "[ERROR][UTIL_readLineFromFile] fgets has a problem check: %s buf: %s \n",
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fgetsCheck == NULL ? "NULL" : fgetsCheck, buf);
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return -1;
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}
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return (int) strlen(buf)-1; /* -1 to ignore '\n' character */
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}
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/* Warning: inputFileSize should be less than or equal buf capacity and buf should be initialized*/
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static int readFromFile(char* buf, size_t inputFileSize, const char* inputFileName) {
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FILE* inputFile = fopen(inputFileName, "r");
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int nbFiles = -1;
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unsigned pos = 0;
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if(!buf) {
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UTIL_DISPLAYLEVEL(1, "[ERROR][UTIL_readFileNamesTableFromFile] Can't create buffer.\n");
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return -1;
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}
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if(!inputFile) {
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UTIL_DISPLAYLEVEL(1, "[ERROR][UTIL_readFileNamesTableFromFile] Can't open file to read input file names.\n");
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return -1;
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}
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for(nbFiles=0; !feof(inputFile) ; ) {
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if(UTIL_readLineFromFile(buf+pos, inputFileSize, inputFile) > 0) {
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int len = (int) strlen(buf+pos);
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buf[pos+len-1] = '\0'; /* replace '\n' with '\0'*/
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pos += len;
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++nbFiles;
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}
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}
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fclose(inputFile);
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if(pos > inputFileSize) return -1;
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return nbFiles;
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}
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/*Note: buf is not freed in case function successfully created table because filesTable->fileNames[0] = buf*/
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FileNamesTable*
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UTIL_createFileNamesTable_fromFileName(const char* inputFileName) {
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U64 inputFileSize = 0;
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unsigned nbFiles = 0;
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int ret_nbFiles = -1;
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char* buf = NULL;
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size_t i = 0, pos = 0;
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FileNamesTable* filesTable = NULL;
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if(!UTIL_fileExist(inputFileName) || !UTIL_isRegularFile(inputFileName))
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return NULL;
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inputFileSize = UTIL_getFileSize(inputFileName) + 1; /* (+1) to add '\0' at the end of last filename */
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if(inputFileSize > MAX_FILE_OF_FILE_NAMES_SIZE)
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return NULL;
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buf = (char*) malloc((size_t) inputFileSize * sizeof(char));
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if(!buf) {
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UTIL_DISPLAYLEVEL(1, "[ERROR][UTIL_readFileNamesTableFromFile] Can't create buffer.\n");
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return NULL;
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}
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ret_nbFiles = readFromFile(buf, (size_t) inputFileSize, inputFileName);
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if(ret_nbFiles <= 0) {
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free(buf);
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return NULL;
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}
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nbFiles = ret_nbFiles;
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filesTable = UTIL_createFileNamesTable(NULL, NULL, 0);
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if(!filesTable) {
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free(buf);
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UTIL_DISPLAYLEVEL(1, "[ERROR][UTIL_readFileNamesTableFromFile] Can't create table for files.\n");
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return NULL;
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}
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filesTable->tableSize = nbFiles;
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filesTable->fileNames = (const char**) malloc((nbFiles+1) * sizeof(char*));
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for(i = 0, pos = 0; i < nbFiles; ++i) {
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filesTable->fileNames[i] = buf+pos;
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pos += strlen(buf+pos)+1;
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}
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if(pos > inputFileSize){
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UTIL_freeFileNamesTable(filesTable);
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if(buf) free(buf);
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return NULL;
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}
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filesTable->buf = buf;
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return filesTable;
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}
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FileNamesTable*
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UTIL_createFileNamesTable(const char** filenames, char* buf, size_t tableSize){
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FileNamesTable* table = (FileNamesTable*) malloc(sizeof(FileNamesTable));
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if(!table) {
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return NULL;
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}
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table->fileNames = filenames;
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table->buf = buf;
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table->tableSize = tableSize;
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return table;
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}
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void UTIL_freeFileNamesTable(FileNamesTable* table) {
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if(table) {
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if(table->fileNames) {
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free((void*)table->fileNames);
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}
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if(table && table->buf) {
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free(table->buf);
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}
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free(table);
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}
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}
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static size_t getTotalTableSize(FileNamesTable* table) {
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size_t i = 0, totalSize = 0;
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for(i = 0 ; i < table->tableSize && table->fileNames[i] ; ++i) {
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totalSize += strlen(table->fileNames[i]) + 1; /* +1 to add '\0' at the end of each fileName */
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}
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return totalSize;
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}
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FileNamesTable*
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UTIL_concatenateTwoTables(FileNamesTable* table1, FileNamesTable* table2) {
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unsigned newTableIdx = 0, idx1 = 0, idx2 = 0;
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size_t i = 0, pos = 0;
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size_t newTotalTableSize = 0;
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FileNamesTable* newTable = NULL;
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char* buf = NULL;
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newTable = UTIL_createFileNamesTable(NULL, NULL, 0);
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if(!newTable) {
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UTIL_DISPLAYLEVEL(1, "[ERROR][UTIL_concatenateTwoTables] Can't create new table for concatenation output.\n");
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return NULL;
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}
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newTotalTableSize = getTotalTableSize(table1) + getTotalTableSize(table2);
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buf = (char*) malloc(newTotalTableSize * sizeof(char));
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if(!buf) {
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UTIL_freeFileNamesTable(newTable);
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UTIL_DISPLAYLEVEL(1, "[ERROR][UTIL_concatenateTwoTables] Can't create buf for concatenation output.\n");
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return NULL;
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}
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for(i = 0; i < newTotalTableSize ; ++i) buf[i] = '\0';
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newTable->tableSize = table1->tableSize + table2->tableSize;
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newTable->fileNames = (const char **) malloc(newTable->tableSize * sizeof(char*));
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if(!newTable->fileNames) {
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UTIL_freeFileNamesTable(newTable);
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if(buf) free(buf);
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UTIL_DISPLAYLEVEL(1, "[ERROR][UTIL_concatenateTwoTables] Can't create new table for concatenation output.\n");
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return NULL;
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}
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for (i = 0; i < newTable->tableSize; ++i)
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newTable->fileNames[i] = NULL;
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for( ; idx1 < table1->tableSize && table1->fileNames[idx1] && pos < newTotalTableSize; ++idx1, ++newTableIdx) {
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size_t curLen = strlen(table1->fileNames[idx1]);
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memcpy(buf+pos, table1->fileNames[idx1], curLen);
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newTable->fileNames[newTableIdx] = buf+pos;
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pos += curLen+1;
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}
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for( ; idx2 < table2->tableSize && table2->fileNames[idx2] && pos < newTotalTableSize ; ++idx2, ++newTableIdx) {
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size_t curLen = strlen(table2->fileNames[idx2]);
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memcpy(buf+pos, table2->fileNames[idx2], curLen);
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newTable->fileNames[newTableIdx] = buf+pos;
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pos += curLen+1;
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}
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if(pos > newTotalTableSize) {
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UTIL_freeFileNamesTable(newTable);
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if(buf) free(buf);
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return NULL;
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}
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newTable->buf = buf;
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UTIL_freeFileNamesTable(table1);
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UTIL_freeFileNamesTable(table2);
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return newTable;
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}
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#ifdef _WIN32
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int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks)
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{
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