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/* Copyright (C) 1997, 2000 Aladdin Enterprises. All rights reserved.
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This software is provided AS-IS with no warranty, either express or
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implied.
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This software is distributed under license and may not be copied,
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modified or distributed except as expressly authorized under the terms
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of the license contained in the file LICENSE in this distribution.
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For more information about licensing, please refer to
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http://www.ghostscript.com/licensing/. For information on
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commercial licensing, go to http://www.artifex.com/licensing/ or
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contact Artifex Software, Inc., 101 Lucas Valley Road #110,
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San Rafael, CA 94903, U.S.A., +1(415)492-9861.
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*/
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/* $Id: ifunc.h,v 1.10 2002/10/31 18:34:25 alexcher Exp $ */
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/* Internal interpreter interfaces for Functions */
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#ifndef ifunc_INCLUDED
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# define ifunc_INCLUDED
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#include "gsfunc.h"
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/* Define build procedures for the various function types. */
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#define build_function_proc(proc)\
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int proc(i_ctx_t *i_ctx_p, const ref *op, const gs_function_params_t *params, int depth,\
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gs_function_t **ppfn, gs_memory_t *mem)
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typedef build_function_proc((*build_function_proc_t));
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/* Define the table of build procedures, indexed by FunctionType. */
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typedef struct build_function_type_s {
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int type;
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build_function_proc_t proc;
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} build_function_type_t;
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extern const build_function_type_t build_function_type_table[];
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extern const uint build_function_type_table_count;
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/* Build a function structure from a PostScript dictionary. */
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int fn_build_function(i_ctx_t *i_ctx_p, const ref * op, gs_function_t ** ppfn,
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gs_memory_t *mem);
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int fn_build_sub_function(i_ctx_t *i_ctx_p, const ref * op, gs_function_t ** ppfn,
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int depth, gs_memory_t *mem);
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/*
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* Collect a heap-allocated array of floats. If the key is missing, set
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* *pparray = 0 and return 0; otherwise set *pparray and return the number
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* of elements. Note that 0-length arrays are acceptable, so if the value
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* returned is 0, the caller must check whether *pparray == 0.
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*/
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int fn_build_float_array(const ref * op, const char *kstr, bool required,
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bool even, const float **pparray,
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gs_memory_t *mem);
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/*
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* Similar to fn_build_float_array() except
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* - numeric parameter is accepted and converted to 1-element array
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* - number of elements is not checked for even/odd
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*/
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int
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fn_build_float_array_forced(const ref * op, const char *kstr, bool required,
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const float **pparray, gs_memory_t *mem);
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/*
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* If a PostScript object is a Function procedure, return the function
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* object, otherwise return 0.
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*/
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gs_function_t *ref_function(const ref *op);
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/*
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* Operator to execute a function.
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* <in1> ... <function_struct> %execfunction <out1> ...
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*/
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int zexecfunction(i_ctx_t *);
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#endif /* ifunc_INCLUDED */
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