libcaca file IO(3caca)

NAME
libcaca file IO -

  Functions
__extern caca_file_t * caca_file_open (char const *, const char *)
Open a file for reading or writing.
__extern int caca_file_close (caca_file_t *)
Close a file handle.
__extern uint64_t caca_file_tell (caca_file_t *)
Return the position in a file handle.
__extern size_t caca_file_read (caca_file_t *, void *, size_t)
Read data from a file handle.
__extern size_t caca_file_write (caca_file_t *, const void *, size_t)
Write data to a file handle.
__extern char * caca_file_gets (caca_file_t *, char *, int)
Read a line from a file handle.
__extern int caca_file_eof (caca_file_t *)
Tell whether a file handle reached end of file.

Detailed Description

These functions allow to read and write files in a platform-independent way.

Function Documentation

  __extern caca_file_t* caca_file_open (char const *path, const char *mode)
Create a caca file handle for a file. If the file is zipped, it is decompressed on the fly.

If an error occurs, NULL is returned and errno is set accordingly:

•   ENOSTS Function not implemented.

•   EINVAL File not found or permission denied.

Parameters:
    path The file path
    mode The file open mode

Returns:
    A file handle to path.

Referenced by caca_import_canvas_from_file().

  __extern int caca_file_close (caca_file_t *fp)
Close and destroy the resources associated with a caca file handle.

This function is a wrapper for fclose() or, if available, gzclose().

Parameters:
    fp The file handle

Returns:
    The return value of fclose() or gzclose().

Referenced by caca_import_canvas_from_file().

  __extern uint64_t caca_file_tell (caca_file_t *fp)
Return the file handle position, in bytes.

Parameters:
    fp The file handle

Returns:
    The current offset in the file handle.

  __extern size_t caca_file_read (caca_file_t *fp, void *ptr, size_tsize)
Read data from a file handle and copy them into the given buffer.

Parameters:
    fp The file handle
    ptr The destination buffer
    size The number of bytes to read

Returns:
    The number of bytes read

Referenced by caca_import_canvas_from_file().

  __extern size_t caca_file_write (caca_file_t *fp, const void *ptr, size_tsize)
Write the contents of the given buffer to the file handle.

Parameters:
    fp The file handle
    ptr The source buffer
    size The number of bytes to write

Returns:
    The number of bytes written

  __extern char* caca_file_gets (caca_file_t *fp, char *s, intsize)
Read one line of data from a file handle, up to one less than the given number of bytes. A trailing zero is appended to the data.

Parameters:
    fp The file handle
    s The destination buffer
    size The maximum number of bytes to read

Returns:
    The number of bytes read, including the trailing zero

  __extern int caca_file_eof (caca_file_t *fp)
Return the end-of-file status of the file handle.

This function is a wrapper for feof() or, if available, gzeof().

Parameters:
    fp The file handle

Returns:
    1 if EOF was reached, 0 otherwise

Referenced by caca_import_canvas_from_file().

Author

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