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/* ----------------------------------------------------------------------------
@COPYRIGHT :
Copyright 1993,1994,1995 David MacDonald,
McConnell Brain Imaging Centre,
Montreal Neurological Institute, McGill University.
Permission to use, copy, modify, and distribute this
software and its documentation for any purpose and without
fee is hereby granted, provided that the above copyright
notice appear in all copies. The author and McGill University
make no representations about the suitability of this
software for any purpose. It is provided "as is" without
express or implied warranty.
---------------------------------------------------------------------------- */
#include <internal_volume_io.h>
#include <stdarg.h>
#define MAX_PRINT_STACK 100
typedef void (*print_function_type) ( STRING );
static print_function_type print_function[MAX_PRINT_STACK] = { NULL };
static int top_of_stack = 0;
static print_function_type print_error_function[MAX_PRINT_STACK] = { NULL };
static int top_of_error_stack = 0;
/* ----------------------------- MNI Header -----------------------------------
@NAME : set_print_function
@INPUT : function
@OUTPUT :
@RETURNS :
@DESCRIPTION: Sets the output function. If you use the function print()
everywhere, in place of printf, then by default it uses
printf to send output to stdout. However, you can call
the set_print_function() to tell it to use a different output
function, e.g. output to a GL or X window.
@METHOD :
@GLOBALS :
@CALLS :
@CREATED : 1993 David MacDonald
@MODIFIED :
---------------------------------------------------------------------------- */
VIOAPI void set_print_function( void (*function) ( STRING ) )
{
print_function[top_of_stack] = function;
}
/* ----------------------------- MNI Header -----------------------------------
@NAME : push_print_function
@INPUT :
@OUTPUT :
@RETURNS :
@DESCRIPTION: Save the current print function, so, for instance, you can
print to stdout temporarily.
@METHOD :
@GLOBALS :
@CALLS :
@CREATED : 1993 David MacDonald
@MODIFIED :
---------------------------------------------------------------------------- */
VIOAPI void push_print_function( void )
{
if( top_of_stack < MAX_PRINT_STACK - 1 )
{
++top_of_stack;
print_function[top_of_stack] = NULL;
}
else
handle_internal_error( "Stack overflow in push_print_function" );
}
/* ----------------------------- MNI Header -----------------------------------
@NAME : pop_print_function
@INPUT :
@OUTPUT :
@RETURNS :
@DESCRIPTION: Restore the print function.
@METHOD :
@GLOBALS :
@CALLS :
@CREATED : 1993 David MacDonald
@MODIFIED :
---------------------------------------------------------------------------- */
VIOAPI void pop_print_function( void )
{
if( top_of_stack > 0 )
--top_of_stack;
else
handle_internal_error( "Stack underflow in pop_print_function" );
}
/* ----------------------------- MNI Header -----------------------------------
@NAME : print
@INPUT : exactly same arguments as printf
@OUTPUT :
@RETURNS :
@DESCRIPTION: prints the arguments to a temporary string buffer, then either
printf's the or calls the user installed function to output
the string.
@METHOD :
@GLOBALS :
@CALLS :
@CREATED : 1993 David MacDonald
@MODIFIED :
---------------------------------------------------------------------------- */
/* VARARGS */
VIOAPI void print( STRING format, ... )
{
va_list ap;
char print_buffer[EXTREMELY_LARGE_STRING_SIZE];
va_start( ap, format );
(void) vsprintf( print_buffer, format, ap );
va_end( ap );
if( print_function[top_of_stack] == NULL )
(void) printf( "%s", print_buffer );
else
(*(print_function[top_of_stack])) ( print_buffer );
}
/* ----------------------------- MNI Header -----------------------------------
@NAME : set_print_error_function
@INPUT : function
@OUTPUT :
@RETURNS :
@DESCRIPTION: Sets the output function. If you use the function print_error()
everywhere, in place of printf, then by default it uses
printf to send output to stderr. However, you can call
the set_print_error_function() to tell it to use a different
output function, e.g. output to a GL or X window.
@METHOD :
@GLOBALS :
@CALLS :
@CREATED : 1993 David MacDonald
@MODIFIED :
---------------------------------------------------------------------------- */
VIOAPI void set_print_error_function( void (*function) ( char [] ) )
{
print_error_function[top_of_error_stack] = function;
}
/* ----------------------------- MNI Header -----------------------------------
@NAME : push_print_error_function
@INPUT :
@OUTPUT :
@RETURNS :
@DESCRIPTION: Save the current print error function, so, for instance, you can
print to stdout temporarily.
@METHOD :
@GLOBALS :
@CALLS :
@CREATED : 1993 David MacDonald
@MODIFIED :
---------------------------------------------------------------------------- */
VIOAPI void push_print_error_function( void )
{
if( top_of_error_stack < MAX_PRINT_STACK - 1 )
{
++top_of_error_stack;
print_error_function[top_of_error_stack] = NULL;
}
else
handle_internal_error( "Stack overflow in push_print_error_function" );
}
/* ----------------------------- MNI Header -----------------------------------
@NAME : pop_print_error_function
@INPUT :
@OUTPUT :
@RETURNS :
@DESCRIPTION: Restore the print_error function.
@METHOD :
@GLOBALS :
@CALLS :
@CREATED : 1993 David MacDonald
@MODIFIED :
---------------------------------------------------------------------------- */
VIOAPI void pop_print_error_function( void )
{
if( top_of_error_stack > 0 )
--top_of_error_stack;
else
handle_internal_error( "Stack underflow in pop_print_error_function" );
}
/* ----------------------------- MNI Header -----------------------------------
@NAME : print_error
@INPUT : exactly same arguments as printf
@OUTPUT :
@RETURNS :
@DESCRIPTION: prints the arguments to a temporary string buffer, then either
fprintf's to stderr or calls the user installed function to
output the string.
@METHOD :
@GLOBALS :
@CALLS :
@CREATED : 1993 David MacDonald
@MODIFIED :
---------------------------------------------------------------------------- */
/* VARARGS */
VIOAPI void print_error( char format[], ... )
{
va_list ap;
char print_buffer[EXTREMELY_LARGE_STRING_SIZE];
va_start( ap, format );
(void) vsprintf( print_buffer, format, ap );
va_end( ap );
if( print_error_function[top_of_error_stack] == NULL )
(void) fprintf( stderr, "%s", print_buffer );
else
(*(print_error_function[top_of_error_stack])) ( print_buffer );
}
/* ----------------------------- MNI Header -----------------------------------
@NAME : handle_internal_error
@INPUT : str
@OUTPUT :
@RETURNS :
@DESCRIPTION: Prints the error string and tries to get users permission to
abort.
@METHOD :
@GLOBALS :
@CALLS :
@CREATED : 1993 David MacDonald
@MODIFIED :
---------------------------------------------------------------------------- */
VIOAPI void handle_internal_error( char str[] )
{
print_error( "Internal error: %s\n", str );
abort_if_allowed();
}
/* ----------------------------- MNI Header -----------------------------------
@NAME : abort_if_allowed
@INPUT :
@OUTPUT :
@RETURNS :
@DESCRIPTION: Checks if the user wants to abort.
@METHOD :
@GLOBALS :
@CALLS :
@CREATED : David MacDonald
@MODIFIED :
---------------------------------------------------------------------------- */
VIOAPI void abort_if_allowed( void )
{
char ch;
if( ENV_EXISTS( "ABORT_FLAG" ) )
{
print_error( "Do you wish to abort (y/n): " );
do
{
ch = (char) getchar();
}
while( ch != 'y' && ch != 'n' );
while( getchar() != '\n' )
{
}
if( ch == 'y' )
{
abort();
}
}
}
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