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fseek(f, 0, SEEK_END); // seek to end of file. size = ftell(f); // get current file pointer. fseek(f, 0, SEEK_SET); // seek back to beginning of file. // proceed with allocating memory and reading the file.
6 cze 2023 · fseek() is used to move the file pointer associated with a given file to a specific position. Syntax of fseek() The fseek() syntax is: int fseek(FILE *pointer, long int offset, int position); Parameters. pointer: It is the pointer to a FILE object that identifies the stream. offset: It is the number of bytes to offset from the position
10 maj 2018 · fgetpos() goes with fsetpos(). And ftell() goes with fseek(). fgetpos() looks practically like ftell() because both take a FILE* parameter, and both return some kind of position in the file, albeit with a slightly different style.
14 maj 2024 · For text streams, the only valid values of offset are 0 (applicable to any origin) and a value returned by an earlier call to ftell (only applicable to SEEK_SET). POSIX allows seeking beyond the existing end of file. If an output is performed after this seek, any read from the gap will return zero bytes.
The ftell() function obtains the current value of the file position indicator for the stream pointed to by stream. The rewind () function sets the file position indicator for the stream pointed to by stream to the beginning of the file.
The fseek function is used to change the file position of the stream stream. The value of whence must be one of the constants SEEK_SET, SEEK_CUR, or SEEK_END, to indicate whether the offset is relative to the beginning of the file, the current file position, or the end of the file, respectively.
14 maj 2024 · int fseek (std:: FILE * stream, long offset, int origin ); Sets the file position indicator for the file stream stream . If the stream is open in binary mode, the new position is exactly offset bytes measured from the beginning of the file if origin is SEEK_SET , from the current file position if origin is SEEK_CUR , and from the end of the ...
