segment

Segment prefix when using pointers as function parameters

由 我的梦境 提交于 2019-12-24 03:09:06
问题 I have an assembler/c question. I just read about segment prefixes, for example ds:varX and so on. The prefix is important for the calculation of the logical address. I read too, that default is "ds" and as soon as you use the ebp register to calculate an address, "ss" is used. For code "cs" is default. That all makes sense. Now I have the following in c: int x; // some static var in ds void test(int *p){ ... *p =5; } ... main(){ test(&x); //now x is 5 } If you now think about the

Assembly Language Absolute addresses and segment registers

由 梦想与她 提交于 2019-12-24 02:51:36
问题 a review problem lists these registers in hex: cs = ???? sp = 0300 ax = a66a ip = 01cf ds = 4100 bp = 0003 bx = 1234 ss = 48ee si = 0100 cx = 00ff es = 4cee di = 1000 dx = 0000 The absolute address of the next instruction to be executed is 40f0f. 40f0f -01cf _____ 40d40 / 10 = 40d4 = cs Is the size of the data segment in bytes always equal to the stack segment minus the data segment * 10? 48ee - 4100 = 7ee0. Likewise, is the code segment in bytes always equal to the data segment minus the

Fill out custom field with used coupon code WooCommerce

由 不羁岁月 提交于 2019-12-23 05:18:07
问题 Right now I'm working with a mailchimp plugin that needs a custom field for validating/segmenting. For this segment I want to check what kind of coupon is used. So I scavenged the following code that should fill my custom field with the used coupons: add_action( 'woocommerce_checkout_update_order_meta', 'my_custom_checkout_field_update_order_meta' ); function my_custom_checkout_field_update_order_meta( $order_id ) { if ( empty( $_POST['my_field_name'] ) ) { $coupons = $order->get_used_coupons

How do I use gstreamer to make an audio clip from a segment of a longer source?

由 烈酒焚心 提交于 2019-12-21 20:49:42
问题 I would like to use gstreamer to save an arbitrary clip from one audio file to a new file. For example, a segment from 1 minute to 2 minutes in the original. How do I do it? 回答1: You need gnonlin. See http://www.jonobacon.org/2006/12/27/using-gnonlin-with-gstreamer-and-python/ You won't need a gnlcomposition because you only want one segment. Use a gnlfilesource with its start and duration set to 0, 1 minute, and media-start and media-duration set to 1 minute, 1 minute. All times and

ORA-01652:unable to extend temp segment by num in tablespace name

由 混江龙づ霸主 提交于 2019-12-21 07:13:08
ORA-01652:unable to extend temp segment by num in tablespace name　 产生原因：ORACLE临时段表空间不足，因为ORACLE总是尽量分配连续空间，一但没有足够的可分配空间或者分配不连续就会出现上述的现象。 　　 　　解决方法：我们知道由于ORACLE将表空间作为逻辑结构-单元，而表空间的物理结构是数据文件，数据文件在磁盘上物理地创建，表空间的所有对象也存在于磁盘上，为了给表空间增加空间，就必须增加数据文件。先查看一下指定表空间的可用空间，使用视图SYS.DBA_FREE_SPACE，视图中每条记录代表可用空间的碎片大小： 　　 　　 SQL>Select file_id,block_id,blocks,bytes from sys.dba_free_space where tablespace_name=’’; 　　 　　 返回的信息可初步确定可用空间的最大块，看一下它是否小于错误信息中提到的尺寸，再查看一下缺省的表空间参数： 　　 　 　SQL>SELECT INITIAL_EXTENT,NEXT_EXTENT,MIN_EXTENTS,PCT_INCREASE FROM SYS.DBA_TABLESPACES WHERE TABLESPACE_NAME=name; 　　 　　

What are segments in Lucene?

由 自闭症网瘾萝莉.ら 提交于 2019-12-20 09:55:10
问题 What are segments in Lucene ? What are the benefits of segments? 回答1: The Lucene index is split into smaller chunks called segments. Each segment is its own index. Lucene searches all of them in sequence. A new segment is created when a new writer is opened and when a writer commits or is closed. The advantages of using this system are that you never have to modify the files of a segment once it is created. When you are adding new documents in your index, they are added to the next segment.

Storing Business Logic in Database

由 可紊 提交于 2019-12-20 08:10:08
问题 We want to write some business logic rules that work on top of certain data to build reports. Not sure which is the best to store them in the database MySQL. It can have a chain of the rules and then a statement for the result as shown above. 回答1: For building reports you can convert business logic in any programming language. And use database data for generating reports. Against of business logic stored in database I place a high value on the power of expression, and I don't find the SQL

Undo Segment/Undo Retention

由 自作多情 提交于 2019-12-20 07:14:51
undo_retention简单定义，就是最多数据的最少保留时间。AUM模式下，undo_retention参数用于事务commit后undo数据保留的时间。单位为秒。这是个no guarantee的限制。也就是，若空间足够，他只是个‘花瓶’；当可用空间不足而又有事务需要回滚空间，则这些数据依然会被覆盖。这个行为可能会导致ORA-01555错误，这些数据被记忆的时间可用v$undostat里面的字段TUNED_UNDORETENTION来查询。 UNDO主要用于以下方面： 1.在执行rollback语句的时候rollback事物 2.恢复数据库 3.提供读一致性 4.为oracle flashback query提供支持 5.使用oracle flashback特性恢复数据库逻辑失败 一般来讲事物的undo信息存储在回滚段中，事物的undo信息一直存在，直到一个commit或者rollback语句执行。自动回滚段管理允许DBA指定oracle数据库保留多久的commit之后的undo信息。防止在长时间的查询产生ora-01555：snapshot too old.通过设置UNDO_RETENTION参数来达到这个目的，默认是900s(15min).可以设置这个参数保证数据库保留undo日志的时间.设置UNDO_MANAGEMENT = AUTO参数就可以设置自动管理回滚段特性。

Why am I getting an unexpected `0xcc` byte when loading nearby code bytes? Is it because of segment register %es?

由 醉酒当歌 提交于 2019-12-20 06:41:14
问题 I got some inconsistent result of instruction. I don't know why this happens, so I suspect %es register is doing something weird, but I'm not sure. Look at below code snippet. 08048400 <main>: 8048400: bf 10 84 04 08 mov $HERE,%edi 8048405: 26 8b 07 mov %es:(%edi),%eax # <----- Result 1 8048408: bf 00 84 04 08 mov $main,%edi 804840d: 26 8b 07 mov %es:(%edi),%eax # <----- Result 2 08048410 <HERE>: 8048410: 11 11 adc %edx,(%ecx) 8048412: 11 11 adc %edx,(%ecx) Result 1: %eax : 0x11111111 Seeing

R plot undo line segment?

由 会有一股神秘感。 提交于 2019-12-20 03:12:51
问题 Is there a quick and easy function to undo a segment or remove it from your plot? p1 <- locator(1) p2 <- locator(1) segments(p1$x, p1$y, p2$x, p2$y, col = 'pink') //Undo segments What I mean to say is, is it possible to store the line segment (color/intensity of each pixel) you are about to erase, and then later on add that line segment where the pink one was to in effect undo the pink segment draw. How would one accomplish this? 回答1: You can do it with Grid graphics, library(grid) ll =
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