lua 解析ffmpeg结构体时候用的正则表达式

local text="AVCodec ff_jpeg2000_decoder = {".."    .name           = \"j2k\",\n".."    .type           = AVMEDIA_TYPE_VIDEO,\n".."    .id             = CODEC_ID_JPEG2000,\n".."    .priv_data_size = sizeof(J2kDecoderContext),\n".."    .init           = j2kdec_init,\n".."    .close          = decode_end,\n".."    .decode         = decode_frame,\n".."    .capabilities = CODEC_CAP_EXPERIMENTAL,\n".."    .long_name = NULL_IF_CONFIG_SMALL(\"JPEG 2000\"),\n".."    .pix_fmts =\n".."        (const enum PixelFormat[]) {PIX_FMT_GRAY8, PIX_FMT_RGB24, PIX_FMT_NONE}\n".."};\n";local text2="".."    .name           = \"j2k\",\n".."    .type           = AVMEDIA_TYPE_VIDEO,\n".."    .id             = CODEC_ID_JPEG2000,\n".."    .priv_data_size = sizeof(J2kDecoderContext),\n".."    .init           = j2kdec_init,\n".."    .close          = decode_end,\n".."    .decode         = decode_frame,\n".."    .capabilities = CODEC_CAP_EXPERIMENTAL,\n".."    .long_name = NULL_IF_CONFIG_SMALL(\"JPEG 2000\"),\n".."    .pix_fmts =\n".."        (const enum PixelFormat[]) {PIX_FMT_GRAY8, PIX_FMT_RGB24, \n\nPIX_FMT_NONE}\n";local szreg= "(%.%s-[%w_]+%s-=%s-%s-[^%b{}]-%s-[,}])";local szreg2="(%.%s-[%w_]+%s-=%s-%b()%s-%b{}%s-[,}])"--"(%b()%s-%b{})-"local szreg3="(%.%s-[%w_]+%s-=%s-".."(%s-[^%b{}]-)((%b()%s-%b{})-)" .."%s-[,}])";for index,value in string.gmatch(text,szreg3) doprint("index\t",index,"\tvalue",value);endlocal tmp="%.%s-[%w_]+%s-=[%s-[%s%w_%b{}\"%[%]%(%)]+]?[%s-[%w_%b()\"]+]?[,}]";local tmp2="%.%s-[%w_]+%s-=[%s-[%s%w_\"%[%]%(%)]+[%b{}]-]?[%s-[%w_%b()\",}]+]?";local tmp3="[%.%s-[%w_=]+]?[[%s-[%s%w_\"%[%]%(%)]+[%b{}]-]?[%s-[%w_%b()\"]+[,}]]?]-";local tmp4="[%.%s-[%w_=]+]?[[%s-[%s%w_\"%[%]%(%)]+[%b{}]-]?[%b{}]?[%s-[%w_%b()\"]+[,}]]?]-";local tmp5="(%.%s-[%w_]+%s-)=(%s-(%b()%s-%b{})([%w_()]+)%s-[,}])";--[[for index,value in string.gmatch(text2,"([%.]?%s-[%w_%b()%b{}%[%]\"%s]+%s-)") doprint("index\t",index,"\tvalue",value);end]]--local text3="#if( FF_API_OLD_METADATA2)||\n1\n".."    const AVMetadataConv *metadata_conv;\n".."#elif \nsssss\n".."#if (FF_API_OLD_METADATA2) \n".."#endif\n".."#elif \n".."#endif";local text4=".name           = \"video4linux,v4l\","print(string.sub(text4,string.find(text4,"%b\"\"")))

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源自:http://blog.csdn.net/weinyzhou/article/details/7533187