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#ifndef ioutil_h
#define ioutil_h
/*
* Copyright (c) 2000, 2001, 2002, 2003, 2004, 2012 by Martin C. Shepherd.
*
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, and/or sell copies of the Software, and to permit persons
* to whom the Software is furnished to do so, provided that the above
* copyright notice(s) and this permission notice appear in all copies of
* the Software and that both the above copyright notice(s) and this
* permission notice appear in supporting documentation.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
* OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
* INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Except as contained in this notice, the name of a copyright holder
* shall not be used in advertising or otherwise to promote the sale, use
* or other dealings in this Software without prior written authorization
* of the copyright holder.
*/
/*.......................................................................
* Callback functions of the following type can be registered to write
* to a terminal, when the default blocking writes to a local terminal
* aren't appropriate. In particular, if you don't want gl_get_line()
* to block, then this function should return before writing the
* specified number of characters if doing otherwise would involve
* waiting.
*
* Input:
* data void * The anonymous data pointer that was registered with
* this callback function.
* s const char * The string to be written. Beware that this string
* may not have a terminating '\0' character.
* n int The length of the prefix of s[] to attempt to
* write.
* Output:
* return int The number of characters written from s[]. This
* should normally be a number in the range 0 to n.
* To signal that an I/O error occurred, return -1.
*/
#define GL_WRITE_FN(fn) int (fn)(void *data, const char *s, int n)
typedef GL_WRITE_FN(GlWriteFn);
/*
* The following output callback function requires a (FILE *) callback
* data argument, and writes to this stream using the fwrite stdio
* function.
*/
GL_WRITE_FN(_io_write_stdio);
/*
* Left justify text within the bounds of the terminal adding optional
* indentation, prefixes and suffixes to each line if requested.
*/
int _io_display_text(GlWriteFn *write_fn, void *data, int indentation,
const char *prefix, const char *suffix, int fill_char,
int term_width, int start, const char *string);
#endif
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