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6bd673ab15
The reply struct's size can safely be determined by the sizeof() operator, so no need for using an extra define here. Making the code easier to read and also open the door for future convenience macros that might determine the buffer size on their own. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net> Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1665>
206 lines
6.9 KiB
C
206 lines
6.9 KiB
C
#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#ifndef __GLX_unpack_h__
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#define __GLX_unpack_h__
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/*
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* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
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* Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice including the dates of first publication and
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* either this permission notice or a reference to
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* http://oss.sgi.com/projects/FreeB/
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* shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Except as contained in this notice, the name of Silicon Graphics, Inc.
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* shall not be used in advertising or otherwise to promote the sale, use or
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* other dealings in this Software without prior written authorization from
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* Silicon Graphics, Inc.
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*/
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#define __GLX_PAD(s) (((s)+3) & (GLuint)~3)
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/*
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** Fetch the context-id out of a SingleReq request pointed to by pc.
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*/
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#define __GLX_GET_SINGLE_CONTEXT_TAG(pc) (((xGLXSingleReq*)pc)->contextTag)
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#define __GLX_GET_VENDPRIV_CONTEXT_TAG(pc) (((xGLXVendorPrivateReq*)pc)->contextTag)
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/*
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** Fetch a double from potentially unaligned memory.
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*/
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#ifdef __GLX_ALIGN64
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#define __GLX_MEM_COPY(dst,src,n) memmove(dst,src,n)
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#define __GLX_GET_DOUBLE(dst,src) __GLX_MEM_COPY(&dst,src,8)
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#else
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#define __GLX_GET_DOUBLE(dst,src) (dst) = *((GLdouble*)(src))
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#endif
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#define __GLX_BEGIN_REPLY(size) \
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reply.length = __GLX_PAD(size) >> 2; \
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reply.type = X_Reply; \
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reply.sequenceNumber = client->sequence;
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#define __GLX_SEND_HEADER() \
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WriteToClient (client, sizeof(xGLXSingleReply), &reply);
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#define __GLX_PUT_RETVAL(a) \
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reply.retval = (a);
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#define __GLX_PUT_SIZE(a) \
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reply.size = (a);
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/*
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** Get a buffer to hold returned data, with the given alignment. If we have
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** to realloc, allocate size+align, in case the pointer has to be bumped for
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** alignment. The answerBuffer should already be aligned.
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**
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** NOTE: the cast (long)res below assumes a long is large enough to hold a
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** pointer.
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*/
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#define __GLX_GET_ANSWER_BUFFER(res,cl,size,align) \
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if (size < 0) return BadLength; \
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else if ((size) > sizeof(answerBuffer)) { \
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int bump; \
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if ((cl)->returnBufSize < (size)+(align)) { \
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(cl)->returnBuf = (GLbyte*)realloc((cl)->returnBuf, \
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(size)+(align)); \
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if (!(cl)->returnBuf) { \
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return BadAlloc; \
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} \
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(cl)->returnBufSize = (size)+(align); \
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} \
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res = (char*)cl->returnBuf; \
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bump = (long)(res) % (align); \
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if (bump) res += (align) - (bump); \
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} else { \
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res = (char *)answerBuffer; \
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}
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#define __GLX_SEND_BYTE_ARRAY(len) \
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WriteToClient(client, __GLX_PAD((len)*__GLX_SIZE_INT8), answer)
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#define __GLX_SEND_SHORT_ARRAY(len) \
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WriteToClient(client, __GLX_PAD((len)*__GLX_SIZE_INT16), answer)
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#define __GLX_SEND_INT_ARRAY(len) \
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WriteToClient(client, (len)*__GLX_SIZE_INT32, answer)
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#define __GLX_SEND_FLOAT_ARRAY(len) \
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WriteToClient(client, (len)*__GLX_SIZE_FLOAT32, answer)
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#define __GLX_SEND_DOUBLE_ARRAY(len) \
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WriteToClient(client, (len)*__GLX_SIZE_FLOAT64, answer)
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#define __GLX_SEND_VOID_ARRAY(len) __GLX_SEND_BYTE_ARRAY(len)
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#define __GLX_SEND_UBYTE_ARRAY(len) __GLX_SEND_BYTE_ARRAY(len)
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#define __GLX_SEND_USHORT_ARRAY(len) __GLX_SEND_SHORT_ARRAY(len)
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#define __GLX_SEND_UINT_ARRAY(len) __GLX_SEND_INT_ARRAY(len)
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/*
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** PERFORMANCE NOTE:
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** Machine dependent optimizations abound here; these swapping macros can
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** conceivably be replaced with routines that do the job faster.
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*/
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#define __GLX_DECLARE_SWAP_VARIABLES \
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GLbyte sw
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#define __GLX_DECLARE_SWAP_ARRAY_VARIABLES \
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GLbyte *swapPC; \
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GLbyte *swapEnd
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#define __GLX_SWAP_INT(pc) \
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sw = ((GLbyte *)(pc))[0]; \
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((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[3]; \
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((GLbyte *)(pc))[3] = sw; \
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sw = ((GLbyte *)(pc))[1]; \
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((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[2]; \
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((GLbyte *)(pc))[2] = sw;
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#define __GLX_SWAP_SHORT(pc) \
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sw = ((GLbyte *)(pc))[0]; \
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((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[1]; \
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((GLbyte *)(pc))[1] = sw;
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#define __GLX_SWAP_DOUBLE(pc) \
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sw = ((GLbyte *)(pc))[0]; \
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((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[7]; \
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((GLbyte *)(pc))[7] = sw; \
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sw = ((GLbyte *)(pc))[1]; \
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((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[6]; \
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((GLbyte *)(pc))[6] = sw; \
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sw = ((GLbyte *)(pc))[2]; \
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((GLbyte *)(pc))[2] = ((GLbyte *)(pc))[5]; \
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((GLbyte *)(pc))[5] = sw; \
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sw = ((GLbyte *)(pc))[3]; \
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((GLbyte *)(pc))[3] = ((GLbyte *)(pc))[4]; \
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((GLbyte *)(pc))[4] = sw;
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#define __GLX_SWAP_FLOAT(pc) \
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sw = ((GLbyte *)(pc))[0]; \
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((GLbyte *)(pc))[0] = ((GLbyte *)(pc))[3]; \
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((GLbyte *)(pc))[3] = sw; \
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sw = ((GLbyte *)(pc))[1]; \
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((GLbyte *)(pc))[1] = ((GLbyte *)(pc))[2]; \
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((GLbyte *)(pc))[2] = sw;
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#define __GLX_SWAP_INT_ARRAY(pc, count) \
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swapPC = ((GLbyte *)(pc)); \
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swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_INT32;\
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while (swapPC < swapEnd) { \
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__GLX_SWAP_INT(swapPC); \
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swapPC += __GLX_SIZE_INT32; \
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}
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#define __GLX_SWAP_SHORT_ARRAY(pc, count) \
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swapPC = ((GLbyte *)(pc)); \
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swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_INT16;\
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while (swapPC < swapEnd) { \
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__GLX_SWAP_SHORT(swapPC); \
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swapPC += __GLX_SIZE_INT16; \
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}
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#define __GLX_SWAP_DOUBLE_ARRAY(pc, count) \
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swapPC = ((GLbyte *)(pc)); \
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swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_FLOAT64;\
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while (swapPC < swapEnd) { \
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__GLX_SWAP_DOUBLE(swapPC); \
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swapPC += __GLX_SIZE_FLOAT64; \
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}
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#define __GLX_SWAP_FLOAT_ARRAY(pc, count) \
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swapPC = ((GLbyte *)(pc)); \
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swapEnd = ((GLbyte *)(pc)) + (count)*__GLX_SIZE_FLOAT32;\
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while (swapPC < swapEnd) { \
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__GLX_SWAP_FLOAT(swapPC); \
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swapPC += __GLX_SIZE_FLOAT32; \
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}
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#define __GLX_SWAP_REPLY_HEADER() \
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__GLX_SWAP_SHORT(&reply.sequenceNumber); \
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__GLX_SWAP_INT(&reply.length);
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#define __GLX_SWAP_REPLY_RETVAL() \
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__GLX_SWAP_INT(&reply.retval)
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#define __GLX_SWAP_REPLY_SIZE() \
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__GLX_SWAP_INT(&reply.size)
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#endif /* !__GLX_unpack_h__ */
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