/*
** Copyright 1995-2095, Silicon Graphics, Inc.
** All Rights Reserved.
**
** This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
** the contents of this file may not be disclosed to third parties, copied or
** duplicated in any form, in whole or in part, without the prior written
** permission of Silicon Graphics, Inc.
**
** RESTRICTED RIGHTS LEGEND:
** Use, duplication or disclosure by the Government is subject to restrictions
** as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
** and Computer Software clause at DFARS 252.227-7013, and/or in similar or
** successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -
** rights reserved under the Copyright Laws of the United States.
*/

#include "glslib.h"

GLSopcode __glsMapOpcode(GLSopcode inOpcode) {
    GLint i;
    const GLint page = __GLS_OPCODE_PAGE(inOpcode);

    if (page < __GLS_OPCODE_PAGE_MAPPED0) return inOpcode;
    #if __GLS_MAPPED_OPCODE_PAGE_COUNT
        for (i = 0 ; i < __GLS_MAPPED_OPCODE_PAGE_COUNT ; ++i) {
            if (page == __glsOpPageMap[i]) return (
                __GLS_OPCODE(
                    __GLS_OPCODE_PAGE_MAPPED0 + i,
                    __GLS_OPCODE_OFFSET(inOpcode)
                )
            );
        }
    #endif /* __GLS_MAPPED_OPCODE_PAGE_COUNT */
    return GLS_NONE;
}

GLSenum __glsOpcodeAPI(GLSopcode inOpcode) {
    switch (__GLS_OPCODE_PAGE(inOpcode)) {
        case __GLS_OPCODE_PAGE_GLS0:
        case __GLS_OPCODE_PAGE_GLS1:
        case __GLS_OPCODE_PAGE_GLS2:
            return (
                __glsOpcodeString[__glsMapOpcode(inOpcode)] ?
                GLS_API_GLS :
                GLS_NONE
            );
        case __GLS_OPCODE_PAGE_GL0:
        case __GLS_OPCODE_PAGE_GL1:
        case __GLS_OPCODE_PAGE_GL2:
        case __GLS_OPCODE_PAGE_GL3:
        case __GLS_OPCODE_PAGE_GL4:
        case __GLS_OPCODE_PAGE_GL5:
        case __GLS_OPCODE_PAGE_GL6:
        case __GLS_OPCODE_PAGE_GL7:
        case __GLS_OPCODE_PAGE_GL8:
        case __GLS_OPCODE_PAGE_GL9:
        case __GLS_OPCODE_PAGE_GL10:
        case __GLS_OPCODE_PAGE_GL11:
        case __GLS_OPCODE_PAGE_GL12:
        case __GLS_OPCODE_PAGE_GL13:
        case __GLS_OPCODE_PAGE_GL14:
        case __GLS_OPCODE_PAGE_GL15:
        case __GLS_OPCODE_PAGE_GL16:
        case __GLS_OPCODE_PAGE_GL17:
        case __GLS_OPCODE_PAGE_GL18:
        case __GLS_OPCODE_PAGE_GL19:
        // DrewB - 1.1
        case __GLS_OPCODE_PAGE_GL20:
        case __GLS_OPCODE_PAGE_GL_SGI0:
        case __GLS_OPCODE_PAGE_GL_SGI1:
        case __GLS_OPCODE_PAGE_GL_SGI2:
        case __GLS_OPCODE_PAGE_GL_SGI3:
        case __GLS_OPCODE_PAGE_GL_SGI4:
        // DrewB - ColorSubTable
        case __GLS_OPCODE_PAGE_GL_MSFT0:
            return (
                __glsOpcodeString[__glsMapOpcode(inOpcode)] ?
                GLS_API_GL :
                GLS_NONE
            );
    }
    return GLS_NONE;
}

GLSopcode __glsUnmapOpcode(GLSopcode inOpcode) {
    GLint i;
    const GLint page = __GLS_OPCODE_PAGE(inOpcode);

    if (page < __GLS_OPCODE_PAGE_MAPPED0) return inOpcode;
    #if __GLS_MAPPED_OPCODE_PAGE_COUNT
        for (i = 0 ; i < __GLS_MAPPED_OPCODE_PAGE_COUNT ; ++i) {
            if (page == __GLS_OPCODE_PAGE_MAPPED0 + i) return (
                __GLS_OPCODE(__glsOpPageMap[i], __GLS_OPCODE_OFFSET(inOpcode))
            );
        }
    #endif /* __GLS_MAPPED_OPCODE_PAGE_COUNT */
    return GLS_NONE;
}

GLboolean __glsValidateOpcode(GLSopcode inOpcode) {
    if (!__glsOpcodeAPI(inOpcode)) {
        __GLS_RAISE_ERROR(GLS_UNSUPPORTED_COMMAND);
        return GL_FALSE;
    }
    return GL_TRUE;
}