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i Generation Gap(TM) User's Guide ii Copyright 1991 By Damon M. Farris Joshua Tree, CA. 92252 All Rights Reserved iii TABLE OF CONTENTS Trade Marks v INTRODUCTION 1 Registration 1 Definition of Shareware 1 Disclaimer - Agreement 2 Audience 3 Requirements 3 Hardware 3 Memory 4 Overhead 4 Theory of Operation Overview 4 Dual File Operation 4 Single File Operation 5 File Size 5 About This Manual 5 Installation 5 Objective 5 Backup distribution diskette 6 Load files 6 General Operation Notes 7 Context Sensitive Help 7 Esc Sequence 7 File Selection from Default Directory Screen 7 Manual Entry of File Name 8 Select Function Menu 8 Help 8 Browse File 8 Comparing Files 9 Is-Was Block 9 Generated Line Numbers 10 File Inference Using Delta Mark 10 Composite and Delta Screen Description 10 Determination of Block Move 11 Loosing Its Way 11 Select Options 11 Skip Line Numbers 12 Expand Tabs 13 Significant Blanks 13 Case Sensitive for Compare 13 Split Screen Mode 13 Sound for Messages 14 Sound for Prompts 14 Save These Selections 14 Lines Max 14 Read Assumptions 15 Function Bar 15 Help Function 16 Index 22 iv File1/Composite 16 File2/Delta 16 Split 17 Option 17 Files 17 Print 17 Save 18 File Selection 18 Command Line 18 Dual file functions 18 Single file functions 18 Options 19 GGCL 19 Redirection of Output 19 View Output 20 GGCL Options and Switches 20 Response File 21 Execution Using Response File 21 v TRADEMARKS IBM PC, XT, AT, PS2 and PC DOS are trademarks of International Business Machines Corporation. MS DOS is a trademark of Microsoft Corporation Generation Gap is a trademark of Mutech vi 1 INTRODUCTION Registration Insure you receive all the free upgrades and latest versions of Generation Gap. Please print and fill out the register.doc file then remit $25.00 to register the complete package. You will receive: - the latest version of Generation Gap which does not display the shareware notice on start up - a complete detailed user's guide You may also register for the partial package of your choice by remitting $15.00 for either GenGap or GGCL where GenGap is the interactive version and GGCL is the Command Line version of Generation Gap. You will receive: - the latest version of the registered option which does not display the shareware notice on start up If the register.doc file does not exist on this diskette, please register by sending a note and the above amount to Mutech, POB 894 Joshua Tree, CA 92252 For further information, support, or to place an order call (818) 881-6112 Definition of Shareware Shareware distribution gives users a chance to try software before buying it. If you try a Shareware program and continue using it, you are expected to register. Individual programs differ on details -- some request registration while others require it, some specify a maximum trial period. With registration, you get anything from the simple right to continue using the software to an updated program with printed manual. Copyright laws apply to both Shareware and commercial software, and the copyright holder retains all rights, 2 with a few specific exceptions as stated below. Shareware authors are accomplished programmers, just like commercial authors, and the programs are of comparable quality. (In both cases, there are good programs and bad ones!) The main difference is in the method of distribution. The author specifically grants the right to copy and distribute the software, either to all and sundry or to a specific group. For example, some authors require written permission before a commercial disk vendor may copy their Shareware. Shareware is a distribution method, not a type of software. You should find software that suits your needs and pocketbook, whether it's commercial or Shareware. The Shareware system makes fitting your needs easier, because you can try before you buy. And because the overhead is low, prices are low also. Shareware has the ultimate money-back guarantee -- if you don't use the product, you don't pay for it. Disclaimer - Agreement Users of Generation Gap must accept this disclaimer of warranty: "Generation Gap is supplied as is. The author disclaims all warranties, expressed or implied, including, without limitation, the warranties of merchantability and of fitness for any purpose. The author assumes no liability for damages, direct or consequential, which may result from the use of Generation Gap." Generation Gap is a "shareware program" and is provided at no charge to the user for evaluation. Feel free to share it with your friends, but please do not give it away altered or as part of another system. The essence of "user-supported" software is to provide personal computer users with quality software without high prices, and yet to provide incentive for programmers to continue to develop new products. If you find this program useful and find that you are using Generation Gap and continue to use Generation Gap after a reasonable trial period, you must make a registration payment of $25.00, or $15.00 depending on option selected, to MuTech. The $25.00 or $15.00 registration fee will license one copy for use on any one computer at any one time. You must treat this software just like a book. An example is that this software may be used by any number of people and may be freely moved from one computer location to another, so long as there is no possibility of it being used at one location while it's being used at another. Just as a book cannot be read by two different persons at the same time. 3 Commercial users of Generation Gap must register and pay for their copies of Generation Gap within 30 days of first use or their license is withdrawn. Site- License arrangements may be made by contacting MuTech. Anyone distributing Generation Gap for any kind of remuneration must first contact MuTech at the above address for authorization. This authorization will be automatically granted to distributors recognized by the (ASP) as adhering to its guidelines for shareware distributors, and such distributors may begin offering Generation Gap immediately (However MuTech must still be advised so that the distributor can be kept up-to- date with the latest version of Generation Gap). You are encouraged to pass a copy of Generation Gap along to your friends for evaluation. Please encourage them to register their copy if they find that they can use it. All registered users will receive a copy of the latest version of the Generation Gap system. Audience There is one primary use of Generation Gap. That is to compare two related files to discover the changes made since the creation of the parent file and the evolution of the descendent file. This guide will refer to these files as the master and the semi-clone(1). While there are many disciplines that need to know these differences, computer programmers were the in- tended audience. However, the interest has expanded and the audience includes Logistic Engineers, Analysts, Secretaries and anyone else who maintains files of descending order. Requirements Hardware Generation Gap requires an IBM PC, XT, AT, PS2 or 100% compatible computer operating with PC DOS or MS DOS Version 3.0 or later. ____________________ 1 We use the term semi-clone here because the assumption is that it is a descendent of the master file with just a few differences. 4 Memory The minimum memory required for Generation Gap is 385K and may require up to 640K, depending on the number and the size of the records in the files to be tested. A rough idea of the requirement can be inferred using the following as a guide line. Notice that this is in addi- tion to the 146,000, or more, bytes required for the executable code that must occupy memory concurrently. For larger files, use GGCL(2) which is the COMMAND line version of Generation Gap. GGCL requires only about 86K to operate leaving more memory for data manipulation. Overhead The overhead(3) for each line in the file to be evalu- ated is as follows: Browse has no overhead. Compare is 24 bytes per record per file. Theory of Operation Overview Generation Gap performs operations on single or dual files. The dual file operations are the browse function and compare function while single file operation is only the browse function. Dual File Operation Browse loads two selected files and displays them in the desired display mode. This mode may be the second file entered overlaying the first file or using one of two Split Screen options, either vertical or horizontal. Compare loads two selected files and performs extensive tests on every line within each file to determine if the second file input has been changed, inserted, deleted or moved. Generation Gap assumes the two files are related and seeks out the lines that match. It uses these lines to maintain synchronization throughout the ____________________ 2 GGCL is the command line version of Generation Gap which requires less memory to operate. This leaves more Random Access Memory (RAM) for data processing. 3 Overhead is the number of bytes GG requires to operate in the particular option chosen in addition to the raw data loaded into memory from the file. 5 process. Using the divide and conquer technique it then operates on the undefined smaller blocks between the matched lines. Single File Operation Browse is the only single file operation. If a single file operation is to be selected, press and hold the Alt key and then press the F10 key. File Size All processing is done within RAM so the size of the files Generation Gap can process is between 70 and 80K for each file, depending on the number of lines contained in each file. A limiting factor is the overhead used by each line. About This Manual There are times within this guide when the terms option and function are used interchangeably. Actually we try to identify the functions as: - Compare - Browse with certain options available when these are executed. We use the term MODE when the options provide alternate results. Generation Gap requires no complex procedures to oper- ate so this user's guide is restricted to showing only examples of accessing the functions and options. If there is a requirement for the user to enter data, the example input is shown inside the symbols "<" ">". i.e., <TYPE MANUAL.DOC | MORE> Installation We will announce the objective such that users who al- ready have everything down can go ahead and load the files where and how they wish then skip to General Operation Notes on page five. Objective Using the DOS commands, make a backup of the distribu- tion diskette. 6 Load all files from the distribution disk into the same subdirectory and in the current path on the hard drive. Ensure that GenGap.prf is in the same subdirectory as GenGap.exe. Please refer to your system manuals, if necessary, and resolve any conflicts between the directions in this guide and your DOS. Backup distribution diskette Insert the diskette into drive A and either enter <diskcopy a: x:> or <xcopy a:g*.* x:> where x is either a or b and the term enter means type the characters and then press the Enter key. Load files If you have a favorite subdirectory for tools and util- ities, then change directories to it. <cd filespec> where filespec is the name of the subdirectory. Other- wise make a subdirectory <md filespec> then <cd filespec> now load the files by entering <xcopy a:g*.*> We assume the backup diskette is in drive a. If it is in drive b, then of course use b: instead of a:. Now refer to the DOS manual and insert or append this new subdirectory to the PATH in the AUTOEXEC.BAT. After the modification is complete, update the PATH by entering <autoexec> and Generation Gap should be ready to operate. 7 If there is a readme.doc on the distribution diskette, read it now by entering <TYPE a:readme.doc | more> This ensures the latest information not in the user's guide is conveyed. You are now free to start Generation Gap and explore as you refer to this guide or read on. If you're in a hurry to get output, refer to the topics on GGCL. Start Generation Gap by entering <gengap> General Operation Notes Context Sensitive Help GG (Generation Gap) provides help at the current function or screen level. For example, when at the Select Function menu and the cursor is located on the Compare File function, press- ing F1 will initialize the help screen filled with text which pertains to that function. This remains true even if the cursor is on the Help function line when F1 is pressed. Esc Sequence Generation Gap uses the Esc key to back out of each screen and return to the previous screen. This con- tinues all the way to the return to DOS. Press Esc if an error occurs or if any doubt about the circum- stances. File Selection from Default Directory Screen The following actions are taken if a function is chosen which requires the selection of a file. GG loads the default directory and presents it for viewing with the ability to select a file for operation. Selection may be accomplished by moving around the screen with the cursor arrows, tab key & back tab, or the name of the file may be typed into the data entry field. Location of the cursor is noted by the highlight of the complete file name. The name of the file is also posted in the data entry field which is 8 updated with every new cursor location. When the proper name is in the data entry field, press Enter to submit the file for type verification. If it is a valid DOS ASCII(4) type, the selection is complete. If is isn't, try again. Manual Entry of File Name When an alphanumeric key is pressed instead of one of the cursor keys, the selection process goes into the manual entry mode. The cursor jumps to the first loca- tion whose leading character matches the key pressed. As the second key is pressed, the cursor seeks a more qualified location if it exists. This seeking contin- ues until the final key is pressed. Pressing Enter will select this file for the operation. If the file is a valid type, the selection is complete as before. When a function is selected that requires two file names, both names must be entered prior to leaving the directory screen. Select Function Menu Help Move the cursor to the function under consideration and press F1 or the number 1. Browse File The ability to browse a file is sometimes necessary af- ter initializing GG. The number of files that can be accessed at one function call is two. The first file selected to browse is loaded into the Composite Window while the second is placed into the Delta Window. If only one file is desired, then press Alt F10 to com- plete the selection otherwise, select the second file. As with all screens in Generation Gap, pressing Esc will cancel the immediate screen and return to the pre- ____________________ 4 ASCII TYPE, for our purpose, is a text line using the American Standard Code for Information Interchange (ASCII) delimited by a Carriage Return and Line Feed. Some operating systems, i.e., UNIX, does not include the carriage return character in the text file. Other files may be of the text type but have embedded control characters. Still others may be binary files such as the executable code and many other variations of the above. 9 vious one. In this case, if Esc is pressed GG will re- turn to the Select Function menu. Press F2, the number 2, or move the cursor to the active line and press en- ter to Browse. Comparing Files The ability to compare two files which are related is the primary function of Generation Gap. The usefulness of the output is directly proportional to the relation of the files. Here are two extreme examples. An example of the output from two files which are not related will be a Delta Screen that contains all deleted lines from the master file and all inserted lines from the semi-clone file. The Composite Screen will contain the same data. An example of the output from two files which are iden- tical will consist of a Delta Screen that contains the notice "There Are No Differences in These Files" while the Composite Screen contains the semi-clone or, in this case, the clone with no embedded markers. In between these extremes, useful information may be gleaned depending on how far the relation is removed. A notice is given as the two files retreat from being related. Press F3, the number 3, or move the cursor to active line and press enter to Compare. Is-Was Block The algorithm to determine whither or not a line is only changed instead of inserted or deleted can be ex- haustive. To keep the program from bogging down, the default for an unidentifiable block of text is 5 records. This may be overridden in GGCL but is not an option in the interactive version of Generation Gap. When this block is very large, GG spends most of its time search- ing for records that have a high probability of being related. That is; every word contained in every line of the clone file is checked against every word in every line of the semi-clone file within the block to verify the change. When this block is output it can really be scrambled. If the unidentified block exceeds this default value, the block is treated as a cohesion of deletes or in- serts. These marks appear to contain more meaningful 10 information than a mixed block of lines marked as Is- Was with embedded Inserts and Deletes. Generation Gap will always take the easy way out to re- solve an ambiguous problem. Even if it requires the marking of an unrelated pair of lines with an Ins-Del combination which may really mean no change has oc- curred. This action on the data implies a line or block of text has moved and not detected with MF and MT. Generated Line Numbers As each file is loaded, Generation Gap identifies the lines and the file where it belongs. This I.D. tag is a line number relative to the first line in the file. This information can be used to locate lines or blocks which have been modified since generation of the master file. File Inference Using Delta Mark GG considers the first file entered as the master file and the second file entered as the semi-clone. There- fore, the present tense "Is" implies the line number of the current file or semi-clone and the past tense "Was" indicates the line number of the master file. "Del" also indicates deleted from the master file and "Ins" implies this is the line number inserted into the semi- clone. Composite and Delta Screen Description The Composite screen contains all records of the semi- clone file that are identical to the records in the master file plus all of the differences between the files. This accounts for extra lines you will notice inserted in the screen. A line may change positions within the file because of other records having been changed, inserted, moved, or deleted. The Delta screen contains only the records that have been changed, added, relocated, or removed. When the number of records exceed the allocated size of the window, a collision notice is presented and the excess records are ignored. There are small fields identified by "More" which has horizontal arrows on the left and right of the status line. These fields indicate that more information is in that direction and pressing the corresponding arrow will bring it into view. 11 Determination of Block Move If a block of text has been relocated, say moved from lines 50 thru 65 to lines 30 thru 45, GG must synchronize the records after identifying the moved block. Sometimes the output must be massaged to convey meaningful information. There will be instances when the moved block will be shown as a Moved From (MF) block from one location and a Moved To (MT) block in another. Then there will be instances where the block will not be marked but the area above and below will be shown as moved. The objective is to show as little movement as possible, so the criterion is to move the smallest block of text. In the case above we could argue that lines 46 thru 49 actually moved while 50 thru 65 remained stationary. Since the outcome is the same, GG indicates the smaller of the two moved--a lot cleaner. Loosing Its Way When the relation of the two files is too far removed, there just are not enough hooks to maintain reliable synchronization. When synchronization is lost, or in doubt, GG will look for the next occurrence of an unam- biguous(5) match between two records in the files. If it finds, them it marks the unknown block as Deletes and Inserts. If it doesn't find them, it marks the block from the last known unambiguous match to the end of the files as Deletes and Inserts. Select Options The following options are available with the default selection active: << Input Sensitive >> Skip Line Numbers On Expand Tabs On Significant Blanks Off Case Sensitive for Compare On ____________________ 5 Unambiguous match is the instant when one and only one record in the current file matches one and only one record in the opposite file. If more than one record has a match in the same file, it is an ambiguous match. 12 << Display Sensitive >> Split Screen Vertical I Horiz I II Sound For Messages On Sound For Prompts On Save These Selections Yes Lines Max Off Note: The Lines Max option is shown only if the display is capable of this option. The options are selected by pressing the space bar when the cursor is on the option under consideration. This toggles the option from its current state, i.e., if it's On then it gets turned Off and vis-a-vis, Off when On. Skip Line Numbers This option is included with the computer programmer in mind. There are several languages which require, or in the past have required, line numbers. These numbers may be resequenced or renumbered without any or few changes to the text itself. However, as far as Generation Gap is concerned, the lines don't match and a change is recorded. To prevent these unreal differences in the files, Skip Line Numbers must be turned on. GG then steps over the number and continues with its task as if they weren't there. CAUTION The previous statement must be restricted to the programmer's arena only or used with extreme care. An example of the wrong use of Skip Line Numbers is when two inventory files are compared. For this purpose, say the first field contains part numbers that evaluate to a numeric. This field is skipped and therefore not included in the test of the record. These conditions provide output that is not very useful and sometimes downright confusing. 13 Expand Tabs There may be instances when a line of text hasn't re- ally been changed except for some reason the tabs have been expanded in one of the files and not the other. When this is suspected, turn on Expand Tabs. The expan- sion requires just a little more time to operate on each line, but not much. When Expand Tabs is toggled from Off to On, the tab stops must be entered. If the boundary is eight, either enter 8 or press Enter and the default overrides. Oth- erwise the range of the boundary is 1 thru 8. Significant Blanks There are instances when the blank lines within a file have meaning. If the need to know when these lines have been inserted, deleted, or changed (expanded or shortened), toggle Significant Blanks On. Otherwise they are ignored. Case Sensitive for Compare There are instances when a character may be in either upper or lower case with the results not being affected. However, there are many times when it is quite significant. For C programmers it may be very important while for Basic programmers it may not be. For other documents it may also be either significant or not. If is important to detect whither or not a meaningful case change has occurred, turn this option on. When Case Sensitive for Compare is Off, all text is output in upper case. Split Screen Mode Split Screen has two modes of operation. Vertical which places the Composite Screen beside the Delta Screen and Horizontal II which places the Composite Screen physi- cally above the Delta Screen. In the Horizontal mode the Delta screen will overlay the Composite screen if the Composite data fills the monitor. Both of the screens grow to fit the available text to be displayed. If the size exceeds the capability of the monitor to display all lines, the screens limit the growth to fit the monitor. The text 14 can be scrolled up/down or left/right and paged up or down when it is too large for the view. The current location of the cursor is highlighted to give a higher level of concentration while reading the text content of the line. The Composite screen grows downward from monitor line 3 while the Delta grows upward from monitor line 24 or line 42, depending on the current screen mode of the monitor. The Horizontal mode is useful when trying to determine the difference between the lines that changed. In the Vertical I mode, the field view of each screen is narrowed and is setup side-by-side. The criterion for screen growth is the same as above except the Delta screen now begins on monitor line 3 and grows downward. The cursor action is also available. The Vertical mode is useful when trying to verify the location of the line or block changes within the two files. Sound for Messages GG generates a couple of attention getting tones when there is an important message displayed. This may be turned off. Sound for Prompts The tones generated for the prompts are slightly dif- ferent from the message tones. Since there are many prompts, these sounds may become a nuisance and can also be turned off. Save These Selections Simple. It does just that. So the next time GG is in- voked, the options don't have to be reset unless de- sired to do so. Lines Max Some hardware allows display of more than 25 lines on the monitor. GG determines if 43 or 50 lines can be displayed and includes Lines Max to be selected if the hardware is capable of the option. This is very useful if the document contains many lines of text. 15 Due to a problem with the ANSI driver in MS-DOS 4.01, the mode at time of invocation will be maintained if other than 25 lines are displayed. Read Assumptions Generation Gap takes the liberty to assume certain at- tributes about the files presented. If there is a deviation from this assumption, then the following consequence will occur: In the case of: line numbers: the Skip Line Numbers option is considered to be in the correct mode or undetermined output is presented. relativity: they are closely related or the output is meaningless. ASCII types: the file must be DOS ASCII or the file name selection is not allowed. Function Bar The Function Bar is the menu selected as an alternative to Pull Down Menus. The operational complexity of Gen- eration Gap is minimum and requires few function keys to facilitate the complete function list. The functions may be exercised by: moving the cursor arrows up or down and then pressing Enter. pressing the corresponding number key. pressing the corresponding Function key. The ease of access depends on the type keyboard and personal preference. 16 Help Function Help on Help is accomplished by placing the cursor on the Help line and pressing the F1 key. If the cursor is located on any other line when the Help access key is pressed, the help screen is invoked for that particular function. File1/Composite The Composite screen represents both the master file and the changes that have been made to it using the current file as an updated version. This screen contains original lines and the marked elements: Is The current contents of the line. Was The old contents of the line. Ins A new line that has been inserted or appended to the master file. Del An old line that has been deleted from the master file MF The original location of a line that has been moved. (Moved From) MT The new location of a line that has been moved. (Moved To) The File1 title is used for the screen when the Browse function is exercised. The content of the screen is the first file loaded into Generation Gap. Press F2 or use either of the other access methods to display the File1/Composite screen File2/Delta The Delta screen represents only the differences be- tween the master file and the current generation. Each line is identified as above. The File2 title is used for the screen when the Browse function is exercised. The content of the screen is the second file loaded into Generation Gap if the second file is selected to browse. Press F3 or use either of the other access methods to display the File2/Delta screen. 17 Split Split selects both of the above screens to be dis- played. The current option mode determines the method of display, vertical or horizontal. The vertical mode shows each screen side-by-side with the Composite on the left and the Delta on the right. The horizontal mode shows the Composite above the Delta. Press F4 or use either of the other access methods to display the screens in the Split mode. Option Option displays the Option menu. This panel allows the selection of options used while viewing the results of the selected process through the use of switches. The selection may be saved for future interrogation. Three of the options are active during the load process and must be considered before the selection of a function. These three are: Case Sensitive for Compare Default is on Skip Line Numbers Default is on Expand Tabs Default is on The other five may be changed before or after the pro- cess is selected and were discussed earlier. Press F5 or use either of the other access methods to display the Options menu. Files Files allow access to the printer and disk drive for printing or saving the screens. They may be selected individually or all at one time for the action under consideration. Press F6 to display the file menu. Print Using the cursor arrows, move the highlight to "Print" and press Enter, or press "P" to display the query of the file (screen) to print. Use any of the previous techniques to make a selection. Select the printer ad- dress. 18 If an error occurs, you will be queried to retry or abort the print process otherwise, the file is printed. Save Using the cursor arrows, move the highlight to Save and press Enter, or press "S" to display the query of the file (screen) to save. Use any of the previous tech- niques to make a selection. File Selection The extension of "CMP" is appended to the name of the master file when saving the Composite screen. The extension of "DLT" is appended to the name of the semi-clone when saving the Delta screen. If the file exists, you will be queried to overwrite. An answer of yes will overwrite the file. Press Esc to enter a new file name. Enter the name of the file for the save. Command Line To by-pass entering the file at the directory screen, the file names and functions may be entered on the command line when invoking Generation Gap. Usage is: "GENGAP filespec1 [filespec2][/option1]...[/option2]" where filespec1 is the name of the master file and filespec2 is the name of the semi-clone file. The square brackets indicate the entry is optional and not part of the input line. The options are any of the following functions/options. If an option or function is entered, it must follow a forward slash. Dual file functions Browse Files BR Compare Files C Single file functions Browse Files BR 19 Options Not Case Sensitive NC Skip Line Numbers On L Display Max Lines LI Expand Tabs Ex Where x is the tab stop. Default is 8 columns. GGCL Generation Gap Command Line(GGCL) is the command line version of Generation Gap that requires less memory than GG. The output is to the screen or can be redi- rected to a file using the redirection symbol. For example: To compare two files and print the Composite and Delta screens to the monitor enter GGCL filenam1 filenam2/c/d where filenam1 and filenam2 are the file names of your choice. Redirection of Output That works fine for small files; but when the input and the output are large, it is more useful to send the output to another file. The data can be viewed with your editor or by using the TYPE COMMAND and PIPING it to MORE. Example: <GGCL filenam1 filenam2/c/d > filenam3> where filenam3 is the file name where to save the out- put and the switches /c and /d tell GGCL to list the Composite file and the Delta file. The /c must be entered when the /d option is selected if the Composite is desired. CAUTION: There is no test of the output file name to determine if it already exists. If there is another file with the same name, it will be overwritten. 20 View Output To view filenam3 using the TYPE COMMAND, enter <TYPE filenam3 | MORE> and the output file will be displayed one screen at a time while waiting for any key to be pressed. See the PC-MS DOS user's guide for more details. The entry is not case sensitive. The upper case is shown to indicate the DOS command only. The vertical bar is the DOS symbol to PIPE the output of TYPE (text of filenam3) to the input of MORE. Using TYPE without the pipe and MORE will just print to the monitor and you must fight the keys to pause the screen. You may also pipe the output directly to MORE by entering <GGCL filenam1 filenam2/c/d | MORE> However the file is only temporary and can't be viewed later. GGCL Options and Switches Option Switch List Composite /c List Delta /d Line Numbers On /l Expand Tabs /ex where x is the tab stop...default is 8 Not Case Sensitive /NC default is Case Sensitive No Extended ASCII /NE default is Extended Change Block /Bx where x is the maximum size of the block to test for changes... See Is-Was for a detailed description and rationale No Extended ASCII characters is necessary when the printer will not print the characters or the printer font does not contain the IBM graphics characters set. 21 Response File When it is necessary to interrogate many files for changes, GGCL will accept a response file. Create the response file with your editor, and ensure only one process per line. Each line must meet the same requirements as if it were entered from the command line with the exception of the output. It is not necessary to redirect the output to a file. GGCL creates its own files by using the first file name input and then generating an extension beginning at AAA and incrementing one character per process. All errors encountered during the process are also written to the current active file. These files may then be viewed as before. Execution Using Response File Invoke GGCL by entering <GGCL @ResponseFileName> The @ character must precede the file name. The line numbers and markings have the same meaning as in GG. If you need reminding of the usage, enter GGCL without any parameters at the COMMAND line and it will print a brief description to the display. For example, enter <GGCL> GGCL gives the error message that no file name was en- tered, but we already knew that. It's the other stuff we're after. If there are any errors entered on the COMMAND line, GGCL will post the error message and dis- play the proper usage. 22 INDEX Agreement 2 Errors 21 Arrows 7, 10, 15, 17, 18 Esc 7, 9, 18 ASCII 8, 15 key 7 Extended 20 Ex 19, 20 ASP 3 Expand Tabs 11, 13, 17, Attributes 15 19, 20 Audience 3 Extended ASCII 20 Basic 13 F1 7, 8, 16 Block 9, 10, 11, 14, 20 F2 9, 16 Boundary 13 F3 9, 16 BR 18 F4 17 Browse 4, 5, 8, 9, 16, 18 F5 17 C F6 17 compare 18 File 10 programmers 13 master 9 Cancel 9 Selection 7 Care 12 File Inference 10 Case Sensitive 11, 13, File menu 17 17, 19, 20 File Selection 18 CAUTION 12, 19 File1 16 Changes 3, 12, 14, 16, 21 File1/Composite 16 Clone 9 File2/Delta 16 Command 19, 20 Filespec1 18 Line 1, 18, 21 Filespec2 18 COMMAND line 4, 18, 21 Function 4, 5, 7, 8, 15, Compare 3, 4, 5, 9, 11, 16, 17, 18 13, 17, 19 keys 15 Files 18 Function Bar 15 Compare File 7 Functions 5, 15, 18 Composite 8, 9, 13, 14, Functions/options 18 16, 17, 19, 20 Generated 14 Screen 10, 13, 18 Generation Gap 9, 18 Consideration 8, 12, 17 Generation Gap Context Sensitive 7 Command Line 19 Current 6, 7, 12, 14, 16, Gengap 7 17, 21 GG 7, 8, 9, 11, 12, 14, file 10 19, 21 Cursor 7, 8, 12, 14, 15, GGCL 1, 4, 7, 9, 19, 20, 16, 17, 18 21 Data entry field 7, 8 Hardware 3, 14 Del 10, 16 Help 7, 8 Deletes 10, 11 Highlight 7, 17, 18 Delta 8, 10, 13, 14, 16, Horizontal 4, 13, 14, 17 17, 19, 20 I.D. tag 10 Screen 9, 10, 16, 18 Input Sensitive 11 Description 20, 21 Ins 10 Differences 3, 9, 10, 12, Insert 6 16 Interactive 1, 9 Directory 7 Is-Was 9, 10 screen 8, 18 Key 5, 6, 7, 8, 15, 16, Disclaimer 2 20 Display Max Lines 19 LI 19 Display Sensitive 12 License 3 Error 7, 18, 21 Line number 10 23 Line Numbers 10, 12, 15, Read Assumptions 15 17, 20, 21 Redirection 19 Lines Max 12, 14 Registration 1, 3 Loosing Its Way 11 Relation 9, 11 Mark 10 Relative 10 Master 3, 9, 10, 16, 18 Relativity 15 file 10, 16 Requirements 3, 21 Master file 10 Save 18, 19 Memory 4, 19 Save These Selections 12, Message 14, 21 14 Messages 12, 14 Screen 4, 7, 8, 9, 10, MF 11, 16 13, 14, 16, 17, 18, Mode 4, 5, 8, 13, 14, 15, 19, 20 17 help 16 More 4, 5, 7, 8, 10, 13, See Is-Was 20 14, 19, 20 Select Function 7, 9 Move 8, 9, 11, 17, 18 Select Options 11 Moved from 11, 16 Selected 4, 5, 8, 12, 14, Moved To 11, 16 15, 16, 17, 19 MT 11, 16 Selection 7, 8, 11, 15, Operation 4, 5, 7, 8, 13 17, 18 Option 1, 5, 9, 12, 13, Semi-clone 3, 9, 10, 18 14, 15, 17, 18, 19, file 9 20 Shareware 1, 2 menu 17 distribution 1 mode 17 Significant Blanks 11, 13 Options 4, 5, 11, 12, 14, Single file 4, 5, 18 17, 18, 19, 20 Skip 5, 12, 17 Overhead 4 Skip Line Numbers 11, 12, PIPE 20 15, 19 PIPING 19 Sound 12, 14 Primary function 9 Split 17 Print 1, 17, 18, 19, 20, Screen 4, 12, 13 21 Switch 20 Printed 18 Synchronize 11 Programmer 12 Test 12, 19, 20 Programmers 3, 13 TYPE 5, 6, 7, 8, 15, 19, Prompts 12, 14 20 Pull Down Menus 15 Unambiguous match 11 Query 17, 18 Vertical 4, 12, 13, 14, 17, 20 Window 8