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) do print("index\t",index,"\tvalue",value); end local 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-)") do print("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