255 regels
11 KiB
C
255 regels
11 KiB
C
//{
|
|
//(
|
|
// File abstraction class which slightly extends the C standard file handling routines
|
|
// to cm style error handling.
|
|
//)
|
|
//
|
|
#ifndef cmFile_h
|
|
#define cmFile_h
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
//(
|
|
enum
|
|
{
|
|
kOkFileRC = cmOkRC,
|
|
kInvalidFlagFileRC,
|
|
kOpenFailFileRC,
|
|
kCloseFailFileRC,
|
|
kReadFailFileRC,
|
|
kWriteFailFileRC,
|
|
kSeekFailFileRC,
|
|
kTellFailFileRC,
|
|
kPrintFailFileRC,
|
|
kObjAllocFailFileRC,
|
|
kHandleInvalidFileRC,
|
|
kStatFailFileRC,
|
|
kBufAllocFailFileRC,
|
|
kBufTooSmallFileRC,
|
|
kFileSysFailFileRC,
|
|
|
|
};
|
|
|
|
typedef unsigned cmFileRC_t;
|
|
typedef cmHandle_t cmFileH_t;
|
|
|
|
extern cmFileH_t cmFileNullHandle;
|
|
|
|
// Flags for use with cmFileOpen().
|
|
enum cmFileOpenFlags_t
|
|
{
|
|
kReadFileFl = 0x01, //< Open a file for reading
|
|
kWriteFileFl = 0x02, //< Create an empty file for writing
|
|
kAppendFileFl = 0x04, //< Open a file for writing at the end of the file.
|
|
kUpdateFileFl = 0x08, //< Open a file for reading and writing.
|
|
kBinaryFileFl = 0x10, //< Open a file for binary (not text) input/output.
|
|
kStdoutFileFl = 0x20, //< Ignore fn use 'stdout'
|
|
kStderrFileFl = 0x40, //< Ignore fn use 'stderr'
|
|
kStdinFileFl = 0x80, //< Ignore fn use 'stdin'
|
|
};
|
|
|
|
// Open or create a file.
|
|
// Equivalent to fopen().
|
|
// If *hp was not initalized by an earlier call to cmFileOpen() then it should
|
|
// be set to cmFileNullHandle prior to calling this function. If *hp is a valid handle
|
|
// then it is automatically finalized by an internal call to cmFileClose() prior to
|
|
// being re-iniitalized.
|
|
//
|
|
// If kStdoutFileFl, kStderrFileFl or kStdinFileFl are set then
|
|
// file name argument 'fn' is ignored.
|
|
cmFileRC_t cmFileOpen(
|
|
cmFileH_t* hp, // Pointer to a client supplied cmFileHandle_t to recieve the handle for the new object.
|
|
const cmChar_t* fn, // The name of the file to open or create.
|
|
enum cmFileOpenFlags_t flags, // See cmFileOpenFlags_t
|
|
cmRpt_t* rpt // The cmRpt_t to use for error reporting
|
|
);
|
|
|
|
// Close a file opened with Equivalent to fclose().
|
|
cmFileRC_t cmFileClose( cmFileH_t* hp );
|
|
|
|
// Return true if the file handle is associated with an open file.
|
|
bool cmFileIsValid( cmFileH_t h );
|
|
|
|
// Read a block bytes from a file. Equivalent to fread().
|
|
cmFileRC_t cmFileRead( cmFileH_t h, void* buf, unsigned bufByteCnt );
|
|
|
|
// Write a block of bytes to a file. Equivalent to fwrite().
|
|
cmFileRC_t cmFileWrite( cmFileH_t h, const void* buf, unsigned bufByteCnt );
|
|
|
|
enum cmFileSeekFlags_t
|
|
{
|
|
kBeginFileFl = 0x01,
|
|
kCurFileFl = 0x02,
|
|
kEndFileFl = 0x04
|
|
};
|
|
|
|
// Set the file position indicator. Equivalent to fseek().
|
|
cmFileRC_t cmFileSeek( cmFileH_t h, enum cmFileSeekFlags_t flags, int offsByteCnt );
|
|
|
|
// Return the file position indicator. Equivalent to ftell().
|
|
cmFileRC_t cmFileTell( cmFileH_t h, long* offsPtr );
|
|
|
|
// Return true if the file position indicator is at the end of the file.
|
|
// Equivalent to feof().
|
|
bool cmFileEof( cmFileH_t h );
|
|
|
|
// Return the length of the file in bytes
|
|
unsigned cmFileByteCount( cmFileH_t h );
|
|
cmFileRC_t cmFileByteCountFn( const cmChar_t* fn, cmRpt_t* rpt, unsigned* fileByteCntPtr );
|
|
|
|
// Set *isEqualPtr=true if the two files are identical.
|
|
cmFileRC_t cmFileCompare( const cmChar_t* fn0, const cmChar_t* fn1, cmRpt_t* rpt, bool* isEqualFlPtr );
|
|
|
|
// Return the file name associated with a file handle.
|
|
const cmChar_t* cmFileName( cmFileH_t h );
|
|
|
|
// Write a buffer to a file.
|
|
cmFileRC_t cmFileFnWrite( const cmChar_t* fn, cmRpt_t* rpt, const void* buf, unsigned bufByteCnt );
|
|
|
|
// Allocate and fill a buffer from the file.
|
|
// Set *bufByteCntPtr to count of bytes read into the buffer.
|
|
// 'bufByteCntPtr' is optional - set it to NULL if it is not required by the caller.
|
|
// It is the callers responsibility to delete the returned buffer with a
|
|
// call to cmMemFree()
|
|
cmChar_t* cmFileToBuf( cmFileH_t h, unsigned* bufByteCntPtr );
|
|
|
|
// Same as cmFileToBuf() but accepts a file name argument.
|
|
// 'rpt' is the report object to use for error reporting.
|
|
cmChar_t* cmFileFnToBuf( const cmChar_t* fn, cmRpt_t* rpt, unsigned* bufByteCntPtr );
|
|
|
|
|
|
// Copy the file named in srcDir/srcFn/srcExt to a file named dstDir/dstFn/dstExt.
|
|
// Note that srcExt/dstExt may be set to NULL if the file extension is included
|
|
// in srcFn/dstFn. Likewise srcFn/dstFn may be set to NULL if the file name
|
|
// is included in srcDir/dstDir.
|
|
cmFileRC_t cmFileCopy(
|
|
const cmChar_t* srcDir,
|
|
const cmChar_t* srcFn,
|
|
const cmChar_t* srcExt,
|
|
const cmChar_t* dstDir,
|
|
const cmChar_t* dstFn,
|
|
const cmChar_t* dstExt,
|
|
cmErr_t* err);
|
|
|
|
|
|
// This function creates a backup copy of the file 'fn' by duplicating it into
|
|
// a file named fn_#.ext where # is an integer which makes the file name unique.
|
|
// The integers chosen with zero and are incremented until an
|
|
// unused file name is found in the same directory as 'fn'.
|
|
// If the file identified by 'fn' is not found then the function returns quietly.
|
|
cmFileRC_t cmFileBackup( const cmChar_t* dir, const cmChar_t* name, const cmChar_t* ext, cmErr_t* err );
|
|
|
|
// Allocate and fill a zero terminated string from a file.
|
|
// Set *bufByteCntPtr to count of bytes read into the buffer.=
|
|
// (the buffer memory size is one byte larger to account for the terminating zero)
|
|
// 'bufByteCntPtr' is optional - set it to NULL if it is not required by the caller.
|
|
// It is the callers responsibility to delete the returned buffer with a
|
|
// call to cmMemFree()
|
|
cmChar_t* cmFileToStr( cmFileH_t h, unsigned* bufByteCntPtr );
|
|
|
|
// Same as cmFileToBuf() but accepts a file name argument.
|
|
// 'rpt' is the report object to use for error reporting.
|
|
cmChar_t* cmFileFnToStr( const cmChar_t* fn, cmRpt_t* rpt, unsigned* bufByteCntPtr );
|
|
|
|
// Return the count of lines in a file.
|
|
cmFileRC_t cmFileLineCount( cmFileH_t h, unsigned* lineCntPtr );
|
|
|
|
// Read the next line into buf[bufByteCnt].
|
|
// Consider using cmFileGetLineAuto() as an alternative to this function
|
|
// to avoid having to use a buffer with an explicit size.
|
|
//
|
|
// If buf is not long enough to hold the entire string then
|
|
//
|
|
// 1. The function returns kFileBufTooSmallRC
|
|
// 2. *bufByteCntPtr is set to the size of the required buffer.
|
|
// 3. The internal file position is left unchanged.
|
|
//
|
|
// If the buffer is long enough to hold the entire line then
|
|
// *bufByteCntPtr is left unchanged.
|
|
// See cmFileGetLineTest() in cmProcTest.c or cmFileGetLineAuto()
|
|
// in cmFile.c for examples of how to use this function to a
|
|
// achieve proper buffer sizing.
|
|
cmFileRC_t cmFileGetLine( cmFileH_t h, cmChar_t* buf, unsigned* bufByteCntPtr );
|
|
|
|
// A version of cmFileGetLine() which eliminates the need to handle buffer
|
|
// sizing.
|
|
//
|
|
// Example usage:
|
|
//
|
|
// cmChar_t* buf = NULL;
|
|
// unsigned bufByteCnt = 0;
|
|
// while(cmFileGetLineAuto(h,&buf,&bufByteCnt)==kOkFileRC)
|
|
// proc(buf);
|
|
// cmMemPtrFree(buf);
|
|
//
|
|
// On the first call to this function *bufPtrPtr must be set to NULL and
|
|
// *bufByteCntPtr must be set to 0.
|
|
// Following the last call to this function call cmMemPtrFree(bufPtrptr)
|
|
// to be sure the line buffer is fully released. Note this step is not
|
|
// neccessary if the last call does not return kOkFileRC.
|
|
cmFileRC_t cmFileGetLineAuto( cmFileH_t h, cmChar_t** bufPtrPtr, unsigned* bufByteCntPtr );
|
|
|
|
// Binary Array Reading Functions
|
|
// Each of these functions reads a block of binary data from a file.
|
|
// The advantage to using these functions over cmFileRead() is only that they are type specific.
|
|
cmFileRC_t cmFileReadChar( cmFileH_t h, char* buf, unsigned cnt );
|
|
cmFileRC_t cmFileReadUChar( cmFileH_t h, unsigned char* buf, unsigned cnt );
|
|
cmFileRC_t cmFileReadShort( cmFileH_t h, short* buf, unsigned cnt );
|
|
cmFileRC_t cmFileReadUShort( cmFileH_t h, unsigned short* buf, unsigned cnt );
|
|
cmFileRC_t cmFileReadLong( cmFileH_t h, long* buf, unsigned cnt );
|
|
cmFileRC_t cmFileReadULong( cmFileH_t h, unsigned long* buf, unsigned cnt );
|
|
cmFileRC_t cmFileReadInt( cmFileH_t h, int* buf, unsigned cnt );
|
|
cmFileRC_t cmFileReadUInt( cmFileH_t h, unsigned int* buf, unsigned cnt );
|
|
cmFileRC_t cmFileReadFloat( cmFileH_t h, float* buf, unsigned cnt );
|
|
cmFileRC_t cmFileReadDouble( cmFileH_t h, double* buf, unsigned cnt );
|
|
cmFileRC_t cmFileReadBool( cmFileH_t h, bool* buf, unsigned cnt );
|
|
|
|
// Binary Array Writing Functions
|
|
// Each of these functions writes an array to a binary file.
|
|
// The advantage to using functions rather than cmFileWrite() is only that they are type specific.
|
|
cmFileRC_t cmFileWriteChar( cmFileH_t h, const char* buf, unsigned cnt );
|
|
cmFileRC_t cmFileWriteUChar( cmFileH_t h, const unsigned char* buf, unsigned cnt );
|
|
cmFileRC_t cmFileWriteShort( cmFileH_t h, const short* buf, unsigned cnt );
|
|
cmFileRC_t cmFileWriteUShort( cmFileH_t h, const unsigned short* buf, unsigned cnt );
|
|
cmFileRC_t cmFileWriteLong( cmFileH_t h, const long* buf, unsigned cnt );
|
|
cmFileRC_t cmFileWriteULong( cmFileH_t h, const unsigned long* buf, unsigned cnt );
|
|
cmFileRC_t cmFileWriteInt( cmFileH_t h, const int* buf, unsigned cnt );
|
|
cmFileRC_t cmFileWriteUInt( cmFileH_t h, const unsigned int* buf, unsigned cnt );
|
|
cmFileRC_t cmFileWriteFloat( cmFileH_t h, const float* buf, unsigned cnt );
|
|
cmFileRC_t cmFileWriteDouble( cmFileH_t h, const double* buf, unsigned cnt );
|
|
cmFileRC_t cmFileWriteBool( cmFileH_t h, const bool* buf, unsigned cnt );
|
|
|
|
// Write a string to a file as <N> <char0> <char1> ... <char(N-1)>
|
|
// where N is the count of characters in the string.
|
|
cmFileRC_t cmFileWriteStr( cmFileH_t h, const cmChar_t* s );
|
|
|
|
// Read a string back from a file as written by cmFileWriteStr().
|
|
// Note that the string will by string will be dynamically allocated
|
|
// and threfore must eventually be released via cmMemFree().
|
|
// If maxCharN is set to zero then the default maximum string
|
|
// length is 16384. Note that this limit is used to prevent
|
|
// corrupt files from generating excessively long strings.
|
|
cmFileRC_t cmFileReadStr( cmFileH_t h, cmChar_t** sRef, unsigned maxCharN );
|
|
|
|
// Formatted Text Output Functions:
|
|
// Print formatted text to a file.
|
|
cmFileRC_t cmFilePrint( cmFileH_t h, const cmChar_t* text );
|
|
cmFileRC_t cmFilePrintf( cmFileH_t h, const cmChar_t* fmt, ... );
|
|
cmFileRC_t cmFileVPrintf( cmFileH_t h, const cmChar_t* fmt, va_list vl );
|
|
|
|
|
|
cmFileRC_t cmFileLastRC( cmFileH_t h );
|
|
cmFileRC_t cmFileSetRC( cmFileH_t h, cmFileRC_t rc );
|
|
|
|
//)
|
|
//}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
|
|
#endif
|