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(c) JAZSOFT 1986 by Jack A. Zucker If you are interested in getting support for these routines or are just feeling plain guilty for using them without paying for them, feel free to send a donation of whatever you can afford. ($25.00 would be appreciated). My address is: JazSoft Jack A. Zucker 10318 Broom Lane Seabrook, Md. 20706 You may leave messages to me concerning problems, advice, etc on Robert Blacher's Computer Connections PCBoard in Washington, D.C. at (202) 547-2008 (2400/1200 baud). or if you are really desperate at my house at (301) 794-5950 or (301) 794-8763. If you get my answering machine, Please leave a message and your phone number, but be forewarned... I will not call you long distance unless you tell me to call collect. Sorry about this but I called one guy and spent a half hour talking to him then found out he lived in Ontario,Ca.!!!! Thanks, and I hope you enjoy. -Jaz DOS FUNCTIONS AND FILE HANDLING 1. JZCLSFIL Close a file handle This functions closes a previously opened file handle. werror = jzclsfil(whandle); int werror -1 if an error occurred, 0 if everything went according to plan. int whandle The opened file handle. 2. JZCPYFIL Copy a file This function copies one file spec to another file spec. Wildcards may also be used in the file spec. jzcpyfil(wsource,wdestin); char *wsource Source file specification char *wdestin Destination file specification 3. JZCRTFIL Create a file handle This function creates a file handle or truncates an existing one. werror = jzcrtfil(wname,wattr); int werror -1 if an error occurred, otherwise a valid dos file handle char *wname File spec to create/truncate int wattr File attribute to create file with. 0 or 32 is the normal file attribute. 4. JZDOSFLG Return the vector of the "in dos" flag. This function returns the address of the "in dos" flag. This is valuable in resident programs to determine whether or not dos commands can be run when a program is interupted. Normally, if the in dos flag <> 0 then a dos call is in progress and dos i/o may NOT be performed. jzdosflg(&wvector); TVECTOR wvector This struct is defined in JAZ.H and contains an segment and offset field. This can be converted to a far pointer and used to reference the in dos flag. EX. #include <jaz.h> TVECTOR wvector; jzdosflg(&wvector); if (memb(wvector.segment,wvector.offset)) printf("\nIn the middle of a dos function call."); 5. JZDOSVER Return the dos major and minor version. This function returns an integer equal to the dos version. The Low byte will be the major version and the High byte will be the minor version. wversion = jzdosver(); int wversion The version of dos you are running. i.e. 0A03 (hex) for dos 3.1 EX. int wversion; wversion = jzdosver(); /* get dos version */ /** ** exit this mythical program ** if the dos version is below 2.0 **/ if ((wversion & 0xFF) < 2) { printf("\nMust have 2.0 or greater to run this program."); exit(1); } 6. JZDSKFRE Return the free space remaining on the disk. This function returns file allocation table information regarding free space remaining on the specified disk. jzdskfre(&wfat,wdrive); TFAT wfat This structure is defined in JAZ.H. It contains fields for free, total, and used. int wdrive; This should be: 0 : default drive 1 : A: 2 : B: 3 : C: etc. EX. #include <jaz.h> TFAT wfat; jzdskfre(&wfat,0); /* get free space on default drive */ if (wfat.free < 360000L) printf("\nThis disk is not empty!"); 7. JZDSKSTS Return a disk status code Return a disk status code for the specified drive. This will not cause an "Abort , Retry, Ignore" error and is good for determining whether or not a disk is formatted or the drive door is open. wstatus = jzdsksts(wdrive); int wstatus $80 - Timeout $40 - Bad Seek $20 - Nec Controller failed $10 - Bad Crc $8 - Attempt to cross 64k boundry $4 - Sector not found $3 - write protect $2 - address mark not found $1 - bad command $0 - Succsessful int wdrive 0..3 for floppy diskette drives A,B,C,D $80..$83 for fixed disk drives C,D,E,F ETC. 8. JZFAT Get file allocation table information. Returns Sect/Allocation unit , total Clusters, bytes/sectors for the specified drive. wid = jzfat(wdrive,§_alloc,§_size,&cluster); char far *wid Far pointer to FAT id byte int wdrive 0 : Default drive 1 : Drive A 2 : Drive B 3 : Drive C etc unsigned int sect_alloc Sectors per allocation unit. (Sect/Cluster) unsigned int sect_size Bytes per sector unsigned int clusters Total Clusters on disk 9. JZFNDFST Find first matching file This function finds the first matching file given a file specification i.e. *.c werror = jzfndfst(wmask,wattr,&wdta); int werror returns 0 if a match was found, otherwise there are no files matching the mask specification. char *wmask File specification i.e. "*.DOC" int wattr Attribute to search for. 1 : Read Only 2 : Hidden 4 : System 8 : Volume Label 16 : Sub-Directory 32 : Archive These may be "OR"ed together to get combinations. Use 0 for normal files, 0xFF for ALL files TDIR wdta; Structure defined in jzdirect.h which defines the disk transfer address buffer, with various directory fields. 10. JZFNDNXT Find next matching file Find the next matching file after initially calling jzfndfst. werror = jzfndnxt(&wdta); int werror returns 0 if a match was found, otherwise ther are no more files matching the mask specification. TDIR wdta Structure defined in jzdirect.h which defines the disk transfer address buffer, with various directory fields. EX. #include <jzdirect.h> int werror; /* return error code */ TDIR wdta; /* disk directory buffer */ werror = jzfndfst("*.*",0,&wdta); /* list all files in directory */ while (werror == 0) { printf("\n%s",wdir.name); werror = jzfndnxt(&wdta); } 11. JZGETATR Get a files attribute Return the attribute for a given file. wattr = jzgetatr(wfilename); int wattr Attribute returned for file -1 : Error (Probably file not found) 1 : Read Only 2 : Hidden 4 : System 8 : Volume Label 16 : Sub-Directory 32 : Archive char *wfilename File name to return attribute for 12. JZGETDAT Return the system date Return the system date as a string. i.e. 01-25-1986 Make sure to reserve enough space for the entire date. at least 11 chars (including the null terminator) jzgetdat(wdate); char *wdate : date string returned here 13. JZGETDR Return the current working directory. Return the working sub-directory as a string.The string will not have a "\" char after it so if you want to use this for searches, you must concatenate a "\" to it, especially if you are in the root dir as it may return "". jzgetdr(wdir); char *wdir Current working sub-directory string on return 14. JZGETDRV Get logged drive Return the current logged drive. wdrive = jzgetdrv(); int wdrive 0 : Drive A 1 : Drive B 2 : Drive C etc.. 15. JZGETDTA Get the disk transfer address Return the current disk transfer address from Dos. This is needed by the directory routines which change the DTA. They save the address in a work variable , then change it for the directory call, then restore it. This is necessary 'cuz some of the high level file access routines use the DTA as the file buffer! jzgetdta(wofs,wseg); int wofs Offset of DTA address int wseg segment of DTA address 16. JZGETFCB Get an unopened FCB Return an unopened FCB record given a drive and file name. The unopened FCB contains detailed info on the file including the starting cluster number. See JZCHKDSK for info on where to use this routine. werror = jzgetfcb(&wfcb,wfilename,wdrive); int werror -1 if an error occurred, 0 if everything went according to plan. TFCB wfcb File control block record defined in JAZ.H char *wfilename File name to get FCB for. Paths are NOT allowed! int wdrive 1 : Drive A 2 : Drive B 3 : Drive C etc... 17. JZGETINT Get an interrupt vector Return the segment/offset address of a given interrupt number jzgetint(wint,&wvec); int wint Interrupt number to get address of TVEC wvec Segment offset record defined in JAZ.H 18. JZGETMEM Allocate memory Return a segment pointer to a block of free memory. werror = jzgetmem(wbytes,&wpointer); int werror -1 if an error occurred, 0 if everything went according to plan. unsigned int wbytes Number of bytes requested to allocate unsigned int wpointer Pointer to segment of free memory. 19. JZGETTIM Get the system time Return the system time as a string: 19:05:22 . Make sure to allocate at least 9 chars for the string length. jzgettim(wtime); char *wtime Time string to be returned. 20. JZGETVOL Get the volume label of a drive Get the volume label for the specified drive; wptr = jzgetvol(wdrive,wvolume); char *wptr Pointer to wvolume argument for using in expressions. Null pointer if error occured. wdrive 0 : Drive A 1 : Drive B 2 : Drive C etc. char *wvolume String for volume label. Make sure to allocate at least 13 chars for this string. 21. JZLOGDRV Change the logged drive. Set the current logged drive. wnumdrives = jzlogdrv(wdrive); int wnumdrives Returns the number of drives in the system int wdrive 0 : Drive A 1 : Drive B 2 : Drive C etc 22. JZOPNFIL Open a file handle Open a file handle for read/write access werror = jzopnfil(wname,wmode); int werror -1 if an error occurred, otherwise a valid dos file handle char *wname File name to open int wmode 0 : read only 1 : write only 2 : read/write et. al. 23. JZPOPDIR Pop a directory Pop a directory from the directory stack and change the current logged directory to it. jzpopdir(&whead,wpopdrive); TSTKHEAD whead Head of stack structure defined in JAZ.H int wpopdrive 1 : Pop the drive as well as the directory 0 : Don't pop the drive, Only the directory. 24. JZPSHDIR Push a directory Push a directory and drive onto the directory stack for subsequent use by jzpopdir. jzpshdir(&whead); TSTKHEAD whead Head of stack structure defined in JAZ.H 25. JZREDFIL Read from a file handle. Read data from a file handle into a buffer. This is a fairly high speed disk access method, very useful for copying files and such. wnum = jzredfil(whandle,wbuf,wamt); unsigned int wnum Actual number of bytes read from the file. A value of < wamt (or 0) means end of file. int whandle The handle of the previously opened file from a call to jzopnfil/jzcrtfil char *wbuf Buffer to read the data into. Usually an array or pointer to char. unsigned int wamt The number of bytes requested to read. 26. JZSEKFIL Seek into a file. Seek to a position into a file. (Random Access). There are 3 methods of seeking: 0 : Seek relative to beginning of file. 1 : Seek relative to Current file position 2 : Seek relative to End of File Note that negative offsets are not allowed !. wpos = jzsekfil(whandle,woffset,wmethod); long wpos Position of the file pointer in bytes relative to the beginning of the file. int whandle The handle of the previously opened file from a call to jzopnfil/jzcrtfil unsigned int woffset Offset of bytes to seek from one of the methods specified in wmethod. int wmethod 0 : Seek relative to beginning of file. 1 : Seek relative to Current file position 2 : Seek relative to End of File EX. /* how to seek to the end of the file minus one */ /* difficult 'cuz negative offsets not allowed */ int whandle; long fsize,jzsekfil(); . . . . . /* assume file was already opened at this point */ fsize = jzsekfil(whandle,0L,2); /* seek to end of file */ if (fsize) { fsize --; /* subtract 1 from size */ jzsekfil(whandle,fsize,0); /* seek to eof - 1 */ } 27. JZSETATR Set a files attributes Set the attributes of a given file . werror = jzsetatr(wname,wattr); int werror -1 if an error occurred, 0 if everything went according to plan. char *wname File name with which to set attributes int wattr Attribute used to set for file. These may be *or* ed together. 1 : Read Only 2 : Hidden 4 : System 8 : Volume Label 16 : Sub-Directory 32 : Archive 28. JZSETDTA Set the disk transfer address This function sets the disk transfer address to the given buffer (relative to DS). Used internally for jzfndfst & jzfndnxt. jzsetdta(&wdta); TDTA wdta Disk transfer structure to point DTA to. 29. JZSETINT Set an interrupt vector Set the vector for a particular interrupt of your specification. Useful for redirecting interrupts to your routines. jzsetint(wint,wvec); int wint Interrupt vector number to set. TVECTOR wvec Structure where segment and offset fields are already filled in. EX. TVECTOR wvec; int prtsc(); wvec.segment = getcs(); wvec.offset = prtsc; /* get address of new print screen */ jzsetint(5,wvec); 30. JZTRMRES Terminate and stay resident Terminate the current process but leaving the program resident in memory. jztrmres(); 31. JZUNQFIL Return a unique file handle/name. This routine is functionally equivalent to JZOPNFIL except it returns a handle pointing to a file name that does not already exist. Very useful for temp files. whandle = jzunqfil(wpath,wattr); int whandle -1 if an error occurred, otherwise a valid dos file handle. char *wpath String containing the path to put the unique file. This must end in a "\" and must be a variable as the file name will be placed in this variable. int wattr Attribute used to create the unique file name 1 : Read Only 2 : Hidden 4 : System 8 : Volume Label 16 : Sub-Directory 32 : Archive 32. JZWRTFIL Write data to a file handle. Write data from a buffer to a file handle. Like jzredfil, this routine is useful for high speed data transfer. wnum = jzwrtfil(whandle,wbuf,wamt); unsigned int wnum Actual number of bytes written to the file. int whandle The handle of the previously opened file from a call to jzopnfil/jzcrtfil char *wbuf Buffer to write the data from. Usually an array or pointer to char. unsigned int wamt The number of bytes requested to write. 33. TRUNCATE Truncate a file. Truncate a file to a certain size. werror = truncate(wname,wsize); int werror -1 if an error occurred, 0 if everything went according to plan. char *wname File name to truncate long wsize New Size of the file. STRING HANDLING 1. INDEX Return the index of a character in a string. Return the index position of the occurance of a character in a substring or -1 if the character was not found. wpos = index(wsource,wch); int wpos index of occurance of character wch in the string wsource. Returns -1 if no occurance. char *wsource Pointer to the source string to search. int wch Character to do the search for. 2. JZCHRPOS Return the index of a character in a string. Return the index position of the occurance of a character in a substring or -1 if the character was not found. wpos = jzchrpos(wsource,wch); int wpos index of occurance of character wch in the string wsource. Returns -1 if no occurance. char *wsource Pointer to the source string to search. int wch Character to do the search for. 3. JZCHRSTR Concatenate a character onto a string This function performs the task of appending a single char to a string (which strcat will not do). It appends a null terminating character to the end of the source string to maintain string compatibility. jzchrstr(wsource,wch); char *wsource Source string to concatenate character to int wch Character to concatenate to wsource. 4. JZCNTSTR Return a centered string. This function returns a string padded with blanks to be centered in a give field width. Note that the maximum limit on string size for this routine is 255. The routine itself does NO range checking so it is up to the application itself to insure that this does not happen. This routine uses a static buffer for the pointer to return so subsequent calls to the routine destroy the previous contents of the returned pointer! wptr = jzcntstr(wsource,wnum); char *wptr pointer to centered string. char *wsource String to have centered. wnum Width of field to center on. 5. JZDLTSTR Delete a substring from another string. Give a starting and ending position, this routine will remove a portion of a string. wnum = jzdltstr(wsource,wfrom,fto); int wnum Number of chars actually deleted. char *wsource String to delete chars from. int wfrom Starting index to delete from int wto Ending index to delete to 6. JZGETPCE Get delimited piece of substring This routine returns the "n"th piece of a delimited string. i.e. Jaz;10318 Broom Lane;Seabrook;Md;20706 the 3rd ";" piece of the string is "Seabrook" wptr = jzgetpce(wsource,wdestin,wdel,wnum); char *wptr Pointer to wdestin, the destination piece. char *wsource The source string with delimiters char *wdestin The destination string. int wdel The character used as a delimiter int wnum Which piece do you want? 7. JZINSSTR Insert a string into another string. This routine does a string insert of one string into another at a given starting position. Note that if wstart is > than the length of the source string, blanks will be appended. jzinsstr(wdestin,wsource,wstart); char *wdestin Pointer to destination string (to be inserted). char *wsource Pointer to string to insert int wstart Index of position to start inserting. 8. JZLFTSTR Return the left n chars from a string This routine returns the left n chars of a given string. note that this routine uses a static 255 byte buffer for the pointer to return so subsequent calls to the routine destroy the previous contents of the returned pointer! wptr = jzlftstr(wstr,wnum); char *wptr Pointer to static buffer containing the left string. char *wstr Source string int wnum The number of chars you want from the source string. 9. JZMIDSTR Return the middle n chars from a string. Given a starting position and a length, return the mid chars from a given string. note that this routine uses a static 255 byte buffer for the pointer to return so subsequent calls to the routine destroy the previous contents of the returned pointer! wptr = jzmidstr(wstr,wstart,wlen); char *wptr pointer to static buffer containing the sub string char *wstr Source string int wstart Starting index of sub string int wlen Length of substring. 10. JZPAD Pad a string This routine pads a given string with a given char. Note that this routine uses a static 255 byte buffer for the pointer to return so subsequent calls to the routine destroy the previous contents of the returned pointer! wptr = jzpad(wstr,wch); char *wptr Pointer to static buffer containing padded string. char *wstr Source string to pad. int wch Character to pad with. 11. JZPRSFIL Parse a path\file This routine parses a path name into a seperate file name and path name with the path name ending in a "\". jzprsfil(wfull,wpath,wfile); char *wfull Full path. i.e. "\\MSC\\JAZ\\JZSEARCH.EXE" char *wpath Returned Path portion of wfull char *wfile Returned file name portion of wfull 12. JZRGTJST Right justify a string This routine right justifies a given string. Effectively padding to the right. Note that this routine uses a static 255 byte buffer for the pointer to return so subsequent calls to the routine destroy the previous contents of the returned pointer! wptr = jzrgtjst(wstr,wnum); char *wptr Pointer to static buffer containing padded string. char *wstr Source string to pad. int wch Character to pad with. 13. JZRGTSTR Return the right n chars of a string This routine returns the rightmost n chars of a given string. Note that this routine uses a static 255 byte buffer for the pointer to return so subsequent calls to the routine destroy the previous contents of the returned pointer! wptr = jzrgtstr(wstr,wnum); char *wptr Pointer to static buffer containing the left string. char *wstr Source string int wnum The number of chars you want from the source string. 14. JZRPLSTR Replace chars in a string. This routine replaces characters in a string with a given substring. jzrplstr(wdestin,wsource,wstart,wlen); char *wdestin Destination string to insert into. char *wsource Source string to insert. int wstart Starting index to replace. int wlen Length of chars to insert. 15. JZSTRCAT Concatenate multiple strings This routine concatenates multiple strings together in one shot. jzstrcat(wsource,wstr1,wstr2,NULL); char *wsource String to concatenate onto char *wstr1 Strings to concatenate *wstr2 etc... char NULL The Routine stops when it detects a null string. You may use 0 here but it's less portable. 16. JZSTRPOS Return a pointer to a substring Returns a pointer to a substring within another string or null if not found. wptr = jzstrpos(wobject,wtarget); char *wptr Pointer to occurance of wobject in wtarget or null if not found. char *wobject String we are searching for char *wtarget String we are searching. 17. JZWLDCRD Wild card file search This routine implements a very simplistic wild card match on two strings. wmatch = jzwldcrd(wsource,wwild); int wmatch 1 : if match 0 : if no match char *wsource Source string we are checking char *wwild Wild card string 18. LITERAL Parse a user string Convert a user string with escape sequences to an internal string. /**/ delineate comments \x1b translates to char(0x1b) \27 translates to char(27) \" translates to " \' translates to ' \\ translates to \ literal(wsource,wdestin); char *wsource Original string with esc sequences char *wdestin Destination string with expansions. 19. RINDEX Return the rear index of a char in a string. Return the last occurance of a char within a string or -1 if not found. wpos = rindex(wsource,wch); int wpos index position of occurance of last wch in wsource or -1 if wch was not found. char *wsource String to do the search on int wch Char we are searching for. 20. TABTOSP Convert tabs to spaces Expand tab chars in a string to spaces given that the default tabs are 1,9,17,25,33,41 etc. wptr = tabtosp(wsource,wdestin); char *wptr Returned Pointer to wdestin. char *wsource Source string with tabs in it. char *wdestin Destination string without tabs. LOW LEVEL OPERATING SYSTEM ROUTINES 1. CLI Clear interrupts Clear the interrupt flag disabling interrupts cls(); 2. DISKINFO Get low level disk info This routine gets low level disk info directly from the boot sector. This will NOT work on a ram disk. It will work only on MSDOS diskettes version 2.0 and above may not work on some variations of MSDOS. werror = diskinfo(&wdiskblk,wdrive); int werror Dos disk error code. Anything <> 0 means some kind of error occured. TDISKBLK wdiskblk Disk block structure defined in JAZ.H . This record contains fields for many low level disk paramters. int wdrive 0 : Drive A 1 : Drive B 2 : Drive C etc. 3. DOSREADS Read disk sectors Directly read sectors from the disk. This routine bypasses the Abort, Retry, Ignore message that you usually get from dos so you can use it as a disk status check. werror = dosreads(wdrive,wsector,wamt,wbuf); int werror Dos error code for read. It will be 0 if no error occurred, otherwise a dos error code. int wdrive 0 : Drive A 1 : Drive B 2 : Drive C etc. int wsector Starting sector number. int wamt Number of sectors to read char *wbuf Buffer to read data into. 4. DOSWRITS Write Disk Sectors Directly write sectors to the disk. This routine bypasses the Abort, Retry, Ignore message that you usually get from dos so you can use it as a disk status check. werror = doswrits(wdrive,wsector,wamt,wbuf); int werror Dos error code for write. It will be 0 if no error occurred, otherwise a dos error code. int wdrive 0 : Drive A 1 : Drive B 2 : Drive C etc. int wsector Starting sector number. int wamt Number of sectors to write char *wbuf Buffer to write data from 5. GETCS Get the code segment value Return the segment value for the code segment. wcode = getcs(); int wcode Value to be returned for the code segment 6. GETDS Get the data segment value Return the segment value for the data segment. wcode = getds(); int wcode Value to be returned for the data segment 7. GETES Get the extra segment value Return the segment value for the extra segment. wcode = getes(); int wcode Value to be returned for the extra segment 8. GETSS Get the stack segment value Return the segment value for the stack segment. wcode = getss(); int wcode Value to be returned for the extra segment 9. INSINT24 Install a critical error handler This routine installs the critical error handler in place of the normal one, eliminating those pesky abort, retry, ignore messages. Note that you must call int24err() after every i/o call or you run the risk of hanging your system on a critical error. insint24(); 10. INT24ERR Return an int 24 error code This routine fetches the error code (if any) after an i/o call after. The insint24 routine must have been previously called. werror = int24err(); int werror 0 if No i/o error otherwise a dos error code. Check the Dos Ref Manual for a description of error codes and thier meanings. 11. INT24HND Critical error dispatcher This is the internal low level critical error dispatcher. The file name is INT24HND.ASM 12. INTR Interrupt Gate This routine provides a way to make bios and dos calls in a similar fashion to Turbo Pascal (Tm). See also MSDOS (under MISC MACROS). intr(&wreg); TREG wreg Register structure for passing to dos or bios. 13. JZBIGFAT Determine FAT SIZE Return 1 if FAT is 16 bit, otherwise, return 0 See JZCHKDSK.DMO for ideas on this one wbig = jzbigfat(wtotalsect,wsectsize); int wbig Returns 1 : 16 bit fat 0 : 12 bit fat int wtotalsect : This must be the total sectors on disk. int wsectsize : This must be the amount of bytes/sector on disk. 14. JZFATEOF Determine if at end of cluster chain for file Return true if at the end of a files cluster chain. See JZCHKDSK.DMO for ideas on this one weof = jzfateof(wcluster,wbig); int weof Returns: 1 : End of file cluster chain 0 : More to go. unsigned int wcluster Cluster number we are currently looking at int wbig 1 : 16 bit fat 0 : 12 bit fat 15. JZGETCLS Convert Fat index to Cluster number Given a FAT array, return the cluster number for a particular index. See JZCHKDSK.DMO for ideas on this one wcluster = jzgetcls(wfat,wcluster,wbig); int wcluster Returned cluster number char *wfat Buffer of file allocation stuff int wcluster Current cluster number int wbig 1 : 16 bit fat 0 : 12 bit fat 16. JZGETDIR Get a pointer to the disk directories Return pointer to disk directories and the number of root directory entires. jzgetdir(&wdir,wdrive,&wnum); TDIR *wdir Pointer to low level directory information. Note that we must supply the routine a pointer to a pointer. int wdrive 0 : Drive A 1 : Drive B 2 : Drive C int wnum Returned Number of root directory entries. 17. JZGETFAT Get a pointer to the FAT Return a pointer to the file allocation for the specified disk drive. jzgetfat(&wfat,wdrive); char *wfat Returned pointer to a file allocation table. Note that this argument is a pointer to a pointer. int wdrive 0 : Drive A 1 : Drive B 2 : Drive C 18. JZINSINT Install a generic interrupt handler This routine installs an interrupt into the generic interrupt handler routine: JZINTHND. jzinsint(wint,wfunction); int wint Interrupt number to define/redefine int wfunction() Address of function to call when this interrupt vector is invoked. EX. #include <jaz.h> #include <jzscreen.h> int clock(); int gcount = 17; /* clock tic counter */ #define TIMER 0x1C main() { jzinsint(TIMER,clock); /* install the new timer interrupt */ jztrmres(); /* terminate but stay resident */ } clock() { char wstr[9]; /* clock tics 18.2 times a second */ if (gcount >= 17) { jzbiostm(wstr); jzscrprn(wstr,0,72,RED); gcount = 0; } else gcount ++; } 19. JZINTHND Generic Interrupt Dispatcher This routine handles the low level pushes, pops, and stack manipulation for a generic interrupt handler. The file name is JZINTHND.ASM 20. READSECT Read sectors from bios This routine uses bios to directly read sectors from the disk. It bypasses dos so you don't get the abort, retry, ignore messages. werror = readsect(wnum,wtrack,wsector,whead,wdrive,wbuf) int werror 0 if no error occurred, otherwise one of the following error codes: $80 - Timeout $40 - Bad Seek $20 - Nec Controller failed $10 - Bad Crc $8 - Attempt to cross 64k boundry $4 - Sector not found $3 - write protect $2 - address mark not found $1 - bad command int wnum Number of sectors to read 0..255 int wtrack Starting Track number int wsector Starting Sector number int whead Head number int wdrive Should be set to one of the following: 0..3 for floppy diskette drives A,B,C,D $80..$83 for fixed disk drives C,D,E,F ETC. char *wbuf Buffer to read data into. Make sure it is at least wnum * wsectorsize bytes long. 21. STI Set the interrupt flag Set the interrupt flag, enabling interrupts. sti(); UTILITY ROUTINES 1. GETCRC Get a crc code for a buffer This routine returns a Cyclic Redundancy Check code for a given buffer. wcrc = getcrc(wbuf,wlen); unsigned int wcrc Crc Code returned from function. char *wbuf Pointer to data buffer to check. int wlen sizeof (wbuf) 2. JZBEEP Sound a beep to the console This routine sounds a slightly more pleasant beep to the console then the standard printf("%c",7); jzbeep(); 3. JZBIOSTM Return a "bios" time string. This routine returns a time string using the bios tic count instead of the dos function. This is handy during interrupt handlers where we cannot make dos calls. jzbiostm(wtime); char *wtime Time string returned in the form HH:MM:SS 4. JZDELAY Delay program execution Delay the current program for the specified number of clock tics. jzdelay(wtics); long wtics Number of tics to delay. There are about 18 clock tics in a second. Make sure you use a long value here or the high word may cause you to "hang" for a long time. (No Pun Intended) 5. JZINTDIR Initialize the directory stack. This routine initializes the directory head structure in preperation for a call to jzpshdir. jzintdir(&wdirhead); TDIRHEAD wdirhead Head of directory structure defined in JAZ.H 6. JZINTSTK Initialize user stack This routine initializes the user stack in preperation for a call to jzpush jzintstk(&whead); TSTKHEAD whead Record containing information pertaining to the user stack 7. JZPOP Pop data from the user stack This routine allows data from the user stack to be "popped" into a variable. This is useful because data type is not a consideration and therefore variables can be popped to variables of other types. jzpop(&whead,wdata,wsize); TSTKHEAD whead Record containing information pertaining to the user stack. char *wdata This can actually be a pointer to any type of data. If type checking is enabled, you may have to use a cast. unsigned int wsize Set this argument to 0 to receive the default size, which was specified when jzpush was called. Setting this value to something other than 0 will override the default and the number of bytes specified. Note that this does not pop other items off the stack, but merely takes more (or less) contiguous memory and places it in wdata. 8. JZPRNPTR Print data from any data type This function allows byte by byte printing of a struct useful usually for debugging purposes. jzprnptr(wptr,wctrl,wlength); char *wptr This can be any type of pointer to a structure, not just char. You may have to use a cast if you use strong type checking. char *wctrl This is the control string for the print. i.e. "\n%0004X" or "%c " or "%d " etc. int wlength The length of the data object to print. Typically it would be sizeof(wptr); 9. JZPUSH Push data onto the user stack This routine is used to push data onto the local stack where it can be popped off later. jzpush(&whead,wdata,wsize); TSTKPTR whead Record containing information pertaining to the user stack. char *wdata This can actually be a pointer to any type of data. If type checking is enabled, you may have to use a cast. unsigned int wsize Set this argument to sizeof(wdata) usually unless you want more or less bytes to be saved on the stack. 10. JZPUTPRN Put Data to the LPT1 device This routine writes chars to LPT1 using bios. It returns the printer status word. wstatus = jzputprn(wch); int wstatus Printer status word. See the bios tech ref manual for details about how to read this word. int wch Character to write to the printer 11. JZREBOOT Reboot the computer This routine allows you to either perform a warm boot or a cold boot of the machine. The warm boot simulates a Ctrl-Alt-Del, and the cold boot simulates a power on with a memory and diagnostics check. jzreboot(wcode); int wcode 1 : cold boot 0 : warm boot 12. JZTIMER Time an event This routine performs a timing of an event in seconds. This routine uses a static variable to store the bios tic count. Because of this it needs to be called once to initialize the tic count. welapse = jztimer(); unsigned int welapse Returned seconds since the last call to this routine. EX. main() { unsigned int w; jztimer(); /* initialize the timer */ for (w = 0 ; w < 0xFFFF ; w ++) /* loop for nothin' */ ; printf("Execution of this loop took %d seconds!",jztimer()); } 13. MEMB Return a byte of memory This function returns a byte of memory, given a segment,offset pair. wch = memb(wseg,wofs); int wch Char returned from memory wseg Segment value to read from wofs Offset value to read from EX. if (memb(0x40,0x49) == 3) printf("I detect a color card in this computer!"); 14. MEMW Return a word of memory This function returns a word of memory, given a segment pair. wch = memw(wseg,wofs); int wch word returned from memory wseg Segment value to read from wofs Offset value to read from EX. wkeystatus = memw(0x40,0x17); /* get keyboard status word */ 15. MEML Return a long of memory This function returns a long of memory, given a segment pair. wlong = meml(wseg,wofs); long wch long returned from memory wseg Segment value to read from wofs Offset value to read from 16. MODEMSTS Return the modem status register This function returns the modem status word from bios. wstatus = modemsts(wport); int wstatus Returned modem status word. Consult the bios tech ref manual for details. int wport 1 : port 1 2 : port 2 17. MOVE Move bytes from one location to another. This routine does a block move in memory of two variables. It does not handle overlap. This routine only handles near objects in the small model compiler. move(wdestin,wsource,wnum); char *wdestin Pointer to destin buffer. It can be any type of pointer. char *wsource Pointer to source buffer, It can be any type of pointer. unsigned int wnum Number of chars to move. 18. POKEB Poke a byte into memory This routine pokes a single byte into a specified memory location by segment,offset. poke(wseg,wofs,wch); int wseg Segment value to poke into int wofs Offset value to poke into int wch Character to poke into memory 19. POKEW Poke a word into memory This routine pokes a single word into a specified memory location by segment,offset. poke(wseg,wofs,wch); int wseg Segment value to poke into int wofs Offset value to poke into int wch Word to poke into memory 20. RSPLIST Create a list from response file This routine creates a linked list of data given a response file on the command line. whead = rsplist(wname); THEAD *whead Pointer to head of structure. Data type defined in JAZ.H char *wname File name to create the list from. 21. SOUNDOFF Turn the speaker off This routine turns the sound off after a call to soundon() soundoff(); 22. SOUNDON Turn the speaker on This routine "Plays" the speaker at a specific frequency. soundon(whertz); int whertz Frequency of pitch. 440 = A VIDEO/SCREEN/WINDOWING ROUTINES (ibm or close compatibles only) 1. CLS Clear the display screen This function clears the display screen to a specified video attribute. This function does not home the cursor. The bit maps for an attribute can be determined based on the following bit pattern: BITS: 7 6 5 4 3 2 1 0 BLINK,RED,GREEN,BLUE,INTENSITY,RED,GREEN,BLUE The left nibble except for bit 7, pertains to the background, and the right nibble except for bit 3, pertains to the foregound color. These can be combined for any combination. cls(wattribute); int wattribute The color attribute we want the screen cleared to. EX. cls(7); /* clear the screen to normal color */ 2. COLOR Change the global color parameters This allows you to change the global foreground and background colors which are used by many of the windowing related routines. You will find various colors defined in JZSCREEN.H The are: BLACK 0 BLUE 1 GREEN 2 CYAN 3 RED 4 MAGENTA 5 BROWN 6 LIGHTGRAY 7 DARKGRAY 8 LIGHTBLUE 9 LIGHTGREEN 10 LIGHTCYAN 11 LIGHTRED 12 LIGHTMAGENTA 13 YELLOW 14 WHITE 15 BLINK 128 color(wfore,wback); int wfore The foreground color you wish to set int wback The background color you wish to set 3. JZAPPEND Append a window to the window list This routine allows you to add a window onto the window list. It does not matter if the list is empty. savescreen = jzappend(&g_header,wattr,y1,x1,y2,x2,wnum); TWINDOW *savescreen Returned pointer will point to the window structure which contains the dimensions of the window, colors contents, et al. THEADER g_header This is the header record for the list. It is initialized in gscreen.h. If you want to use more than one window list, you must create your own header record and initialize it yourself. int wattr This is the color attribute stored for the window. int y1 Upper left row axis int x1 Upper left column axis int y2 Lower right row axis int x2 Lower right column axis int wnum This is an arbitrary number you assign to the window. After creating the window list, you can do searches on the list by number so it would be a good idea to have a unique number for each window. 4. JZBIGLTR Draw big letters on the screen This routine draws big letters 8 * 8 chars on the screen using the bit mapped character set in rom at address: 0xF000:FA6E. It prints the characters directly to the screen memory for speed. jzbigltr(wch,wrow,wcol,wdrawchr,wattr); int wch This is the character you want to draw to the screen. int wrow Row position to write to . 0..24 int wcol Column position to write to 0..79 int wdrawchr This is the character you want to use when drawing. For example, a good char to use on an IBM is 178 which appears on the screen as '▓'. int wattr Color attribute for the screen write. 5. JZBIGSTR Draw a big string to the screen This routine calls jzbigltr to draw a string to the screen. jzbigstr(wstr,wrow,wcol,wdrawchr,wattr); char *wstr String we want to display on the screen. There is room for 10 characters on a line. int wrow Row position to write to . 0..24 int wcol Column position to write to 0..79 int wdrawchr This is the character you want to use when drawing. For example, a good char to use on an IBM is 178 which appears on the screen as '▓'. int wattr Color attribute for the screen write. 6. JZCLREOL Clear to the end of the line This routine clears the line from the given position to the end of the line. jzclreol(wrow,wcol,wattr); int wrow Row position to clear from int wcol Column position to clear from int wattr Attribute to clear line with 7. JZCLRSCR Clear the current screen WINDOW This routine clears the ACTIVE window with the colors contained in the global color parameters . (You can change these with a call to color()) jzclrscr(); 8. JZCLRWND Change the color of a window This routine allows you to change a windows colors without changing it's contents. jzclrwnd(wwindow,wattr); TWINDOW *wwindow Pointer to window to change color of. Use wsearch() to return the pointer of a specified window #. int wattr The new color attribute you wish to change the window to. 9. JZCLSWND Close the current window Close a window, restore it's previous contents, and free up the memory taken up by the window struct and it's window buffer. wfound = jzclswnd(wnum); int wfound Returns 1 if window was found, 0 if not found. int wnum Number of the window to close. 10. JZCPYWND Copy one window to another. This procedure simply copies the window from the specified window number to the destination window. wcopy = jzcpywnd(worig,wnum); TWINDOW *wcopy Returns pointer to which a new copy of a window is assigned. Null if wnum was not found. TWINDOW *worig Original window to copy. wnum Window number to assign the copy. 11. JZDELETE Delete a window from the list. Delete the specified window number from the list. jzdelete(wnum); int wnum The number of the window which you wish to delete. 12. JZDRWBOX Draw a box to the display screen. This procedure draws a box on the screen like so... ┌────────────────────────────────────────────────────────────────────────────┐ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ └────────────────────────────────────────────────────────────────────────────┘ jzdrwbox(wrow,wcol,wlen,wwidth,wattr); int wrow Starting row position of upper left corner of box int wcol Starting column position of upper left corner of box int wlen Length of horizontal axis int wwidth Width of vertical axis int wattr Color attribute of the window box. 13. JZDSPFLD Display a field on the screen This routine displays a field at a given row,column position and a given color attribute with a given field width. If the string to be displayed has a length of less than the width, then the string is padded to the right with blanks. jzdspfld(wstr,wlen,wrow,wcol,wattr); char *wstr String to display in the field. int wlen Max length of the field. int wrow Row position of the field int wcol Column position of the field. int wattr Color attribute of the field. 14. JZGETCUR Get cursor size and position Return the cursor starting and ending scan lines as well as it's absolute position on the screen. jzgetcur(&wrow,&wcol,&wstart,&wend); int wrow Pointer to returned row position int wcol Pointer to returned col position int wstart Pointer to starting scan line of cursor int wend Pointer to ending scan line of cursor 15. JZGETMOD Get the current screen mode Return the current screen mode. wmode = jzgetmod(); int wmode The returned mode of the screen. 16. JZINSTR Edit a string with editing keys. This routine provides a formatted editing for a field. It is similar in style to DBASE or WORDSTAR. wkey = instr(wstr,wlen,wrow,wcol,wattr,wtime,wkeystr); int wkey This is the key that was pressed to end the input. It is usually the return key, but if you have activated other keys using wkeystr, it would be the scan code of an active key. int wlen Max length of the field. int wrow Starting row of field edit. int wcol Starting col of field edit. int wattr Color attribute of edit field. long wtime Maximum amount of time with no keys being pressed. Edit will time out after wtime worth of inactivity and a return key is returned. char *wkeystr String of scan codes to terminate the read on. i.e. If you want to activate the F1 key which would be "\x3B" EX. #define cESC "\001" #define ESCSCAN 1 /* scan code for escape code */ main() { int w = 1,wch; char name[31],street[31],city[16],state[3],zip[6],phone[13]; name[0] = 0; street[0] = 0; city[0] = 0; state[0] = 0; zip[0] = 0; phone[0] = 0; do { switch(w) { case 1 : wch = jzinstr(name,30,5,8,(CYAN << 4) + BLUE,60L,cESC); break; case 2 : wch = jzinstr(street,30,6,8,(CYAN << 4) + BLUE,60L,cESC); break; case 3 : wch = jzinstr(city,15,7,8,(CYAN << 4) + BLUE,60L,cESC); break; case 4 : wch = jzinstr(state,2,8,8,(CYAN << 4) + BLUE,60L,cESC); break; case 5 : wch = jzinstr(zip,5,9,8,(CYAN << 4) + BLUE,60L,cESC); break; case 6 : wch = jzinstr(phone,12,10,8,(CYAN << 4) + BLUE,60L,cESC); break; } switch (wch) { case CTRL_X : case CTRL_M : w = min(LAST,w+1); break; case CTRL_E : w = max(FIRST,w-1); break; case PGDN : w = LAST; break; case PGUP : w = FIRST; break; case ESCSCAN: return; } } while (-1); } 17. JZINTWND Initialize global window parms Initialize the various window parameters: jzintwnd(wrow1,wcol1,wrow2,wcol2,wattr) int wrow1 Set global upper left row position int wcol1 Set global upper right column position int wrow2 Set global lower right row position int wcol2 Set global lower right column position int wattr Color attribute to set the window to. 18. JZLOCCUR Position the cursor This function positions the cursor on the display screen. It is an absolute cursor positioning, independant of window dimension. jzloccur(wrow,wcol); int wrow Row position to set cursor to . 0..24 int wcol Column position to set cursor to . 0..79 19. JZMENU Display a menu on the screen. This routine displays a menu and returns the users choice. The style of menu is similar to the lotus menus where you use the arrow keys to scroll through the choices and select an item by pressing <enter> when that item is highlighted. This routine saves the users screen so that when the item is selected, the screen is restored to it's previous contents and the cursor is brought back to it's original position. wchoice = jzmenu(wlist,wfore,wback,wkeys) int wchoice Returned value of the choice. 0 = option 1 1 = option 2 2 = option 3 etc.. char **wlist Pointer to a pointer of strings to display on the menu. int wfore Foreground color of menu int wback Background color of menu EX. char *wlist[] = { "THIS IS A TEST", "OF THE EMERGENCY", "BROADCAST SYSTEM", "IF THIS WERE A", "REAL EMERGENCY" , "YOU WOULD HAVE", "BEEN NOTIFIED..." , "WHY AM I TYPING THIS?", "" }; #include <jzscreen.h> #include <gscreen.h> #define wkeystr "\x3B\x01" /* scan codes for F1 and ESC */ #define ESC 1 /* scan code for ESC */ #define F1 0x3b /* scan code for F1 */ main() { int wchoice; wchoice = jzmenu(wlist,WHITE,BLUE,wkeystr); switch(wchoice) { case ESC : printf("\nThe Esc key was pressed"); break; case F1 : printf("\nThe F1 key was pressed"); break; default : printf("\nYou picked item %d",wchoice); break; } } 20. JZMOVWND Move a window on the screen. This routine moves a windows position on the screen. It does NOT restore the previous contents of the original position. jzmovwnd(wptr,wrow,wcol); TWINDOW *wptr Pointer to window structure to move. wrow Row position to move window to wcol Col position to move window to. 21. JZOPNWND Open a window on the screen This routine opens a screen window, drawing the box around the window, clearing the window screen to the selected attributes, and adding the window structure to the window list. wwindow = jzopnwnd(wnum,wrow,wcol,wlen,wwidth,wfore,wback); TWINDOW *wwindow Returned pointer to window structure just created int wnum Number to save for this window. This can be set to any number but you should have a unique number for each window you create. int wrow Starting upper left row position of window. int wcol Starting upper left col position of window int wwidth Horizontal length of window int wlen Vertical Length of window int wfore Foreground color of window int wback Background color of window 22. JZPGECLR Clear the given page This routine clears the given page to the specified color attribute. jzpgeclr(wpage,wattr); int wpage A valid page number. On the CGA adapter card, this would be 0..3. There is only one page on the Mono card. int wattr Color attribute to clear the screen to. 23. JZPGEPRN Print directly to a page This routine prints a string directly to video memory on the specified page number. This should not be used on a monochrome adapter. jzpgeprn(wstr,wrow,wcol,wattr,wpage); char *wstr String pointer to print to the given page int wrow Row position relative to page top to print to int wcol Col position relative to page top to print to int wattr Color attribute use when printing. int wpage A valid page number. 0..3 24. JZPLOT Plot a dot to the graphics screen This function plots a pixal to the color graphics screen. jzplot(wrow,wcol,wattr); int wrow Row position of pixel to plot int wcol Col position of pixel to plot int wattr Color attribute to plot dot with 25. JZREDCHR Read a char and attribute from screen This function reads a character and attribute from the current cursor position jzredchr(&wch,&wattr); int wch Pointer to the returned character. int wattr Pointer to the returned attribute 26. JZREDSCR Read a string from the screen. This function returns a string from a given screen position. It does not return attributes. jzredscr(wstr,wrow,wcol,wlen); char *wstr Pointer to the string to be returned. int wrow Starting row position to read from screen. int wcol Starting col position to read from screen. int wlen Length of string to read from screen. 27. JZRSTWND Restore a windows contents This routine restores a windows contents without removing the window from the window list. jzrstwnd(wwindow); TWINDOW *wwindow Pointer to window to restore contents of 28. JZSAVWND Save a windows contents Save a windows contents into an existing window structure. The window buffer is NOT resized so if you change sizes of windows, be careful to realloc() the window buffer before calling this routine. This routine is useful during window moves. jzsavwnd(wwindow); TWINDOW *wwindow Pointer to existing window struct to save. 29. JZSCRLDN Scroll a window down This routine calls bios to scroll a window down on the screen. jzscrldn(wyx1,wyx2,wnum,wattr); int wyx1 This integer contains the upper left row position of the window in the high byte and the upper left column position in the low byte. int wyx2 This integer contains the lower right row position of the window in the high byte and the lower right column position in the low byte. int wnum Number of lines to scroll. At maximum, this number should be Y2 - Y1. Specify 0 to scroll the whole window, effectively clearing it. Specifying : Y2 - Y1 + 1, which is the actual number of lines in the window will garble up the screen on an IBM pc. 30. JZSCRLUP Scroll a window up This routine calls bios to scroll a window up on the screen. jzscrlup(wyx1,wyx2,wnum,wattr); int wyx1 This integer contains the upper left row position of the window in the high byte and the upper left column position in the low byte. int wyx2 This integer contains the lower right row position of the window in the high byte and the lower right column position in the low byte. int wnum Number of lines to scroll. At maximum, this number should be Y2 - Y1. Specify 0 to scroll the whole window, effectively clearing it. Specifying : Y2 - Y1 + 1, which is the actual number of lines in the window will garble up the screen on an IBM pc. 31. JZSCROFF Disable the video screen (DO NOT USE WITH HERCULES CARDS) This disables the video signal to the screen, blanking (but not clearing) the display screen. This routine has been known to cause hardware damage to certain non - ibm video cards. I am not responsible if this happens to you! jzscroff(); 32. JZSCRON Enable the video screen (DO NOT USE WITH HERCULES CARDS) This routine enables the video signal to the screen. Restoring it's previous contents. it's previous contents. This routine has been known to cause hardware damage to certain non - ibm video cards. I am not responsible if this happens to you! jzscron(); 33. JZSCRPRN Print directly to video memory This routine allows you to print directly to video memory specifying row,column and color. It also avoids snow on the ibm CGA card. It is a very fast routine, about 10 times faster than printf(). jzscrprn(wstr,wrow,wcol,wattr); char *wstr String to print to screen. int wrow Row to print to int wcol Column to print to int wattr Color attribute to use when printing. 34. JZSETCUR Set the cursors size This routine allows you to adjust the cursors starting and ending scan lines. The cursor is mapped as follows: Default Scan Monochrome Color 1 . . . . . . . . . . . . . . . . 2 . . . . . . . . . . . . . . . . 3 . . . . . . . . . . . . . . . . 4 . . . . . . . . . . . . . . . . 5 . . . . . . . . . . . . . . . . 6 . . . . . . . . . . . . . . . . 7 . . . . . . . . Start ▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ 8 . . . . . . . . End ▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ 9 . . . . . . . . 10 . . . . . . . . Start 11 ▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ End 12 ▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ jzsetcur(wstart,wend); int wstart Starting scan line of cursor int wend Ending scan line of cursor 35. JZSETMDE Set the screen mode Set the current screen mode. jzsetmde(wmode); int wmode Valid screen mode. 36. JZSETPGE Activate a page This function activates a page of video memory. jzsetpge(wpage); int wpage A page of CGA memory to activate. 0..3 37. JZWNDASN Assign values to a window structure This internal routine (used by jzappend) is a convenient way of assigning values to a window structure. jzwndasn(wwindow,wrow,wcol,wattr,wnum,wy1,wx1,wy2,wx2); TWINDOW *wwindow Pointer to window to assign values to wrow Row position to assign wcol Col position to assign wattr Attribute to assign wnum Window number to assign wy1 Upper left row to assign wx1 Upper left col to assign wy2 Lower right row to assign wx2 Lower right col to assign 38. JZWRITE Write to the current window This function writes a string to the current window in the using the global color and window parameters. jzwrite(fstr); char *wstr String to write 39. JZWRTCHR Write a char to the screen using bios This function writes a char to the screen using bios. jzwrtchr(wch,wattr,wnum); int wch Character to write int wattr Color attribute of char int wnum Number of copies to write 40. JZWRTSTR Write a string using bios This routine writes a string to the screen using the bios jzwrtchr call. jzwrtstr(wstr,wrow,wcol,wattr); char *wstr String to write to screen. int wrow Row to write to int wcol Column to write to int wattr Color attribute to use when writing. 41. LOCATE Position the cursor in the window This routine positions the cursor relative to the active window. locate(wrow,wcol); int wrow Row position of cursor in the window int wcol Col position of cursor in the window 42. MOVEATTR Move attributes to a screen window This routine move attributes only to a screen window which allows you to change the color of a window without affecting it's contents and avoiding snow. moveattr(wscreenseg,woffset,wnumrows,wnumcols,wattr); int wscreenseg Segment address of active screen. Should be 0xb800 for color, 0xb000 for mono. int woffset Offset of screen position. Computed by row * 160 + (col << 1) int wnumrows Number of rows in window int wnumcols Number of cols in window int wattr Attribute color of window 43. MOVEB Move a screen window to a buffer Internal routine (see jzsavwnd) to move screen memory to a buffer avoiding snow. moveb(wscreenseg,woffset,wbufseg,wbufofs,wnumrows,wnumcols); int wscreenseg Segment address of active screen. Should be 0xb800 for color, 0xb000 for mono. int woffset Offset of screen position. Computed by row * 160 + (col << 1) int wbufseg Segment address of destination buffer. getds() can be used here usually. int wbufofs Offset address of buffer. int wnumrows Number of rows in window int wnumcols Number of cols in window 44. MOVES Move a buffer to screen memory This routine moves a buffer to a screen window avoiding snow. moves(wbufseg,wbufofs,wscreenseg,woffset,wnumrows,wnumcols); int wbufseg Segment address of destination buffer. getds() can be used here usually. int wbufofs Offset address of buffer. int wscreenseg Segment address of active screen. Should be 0xb800 for color, 0xb000 for mono. int woffset Offset of screen position. Computed by row * 160 + (col << 1) int wnumrows Number of rows in window int wnumcols Number of cols in window 45. WINDOW Set the window dimensions This routine allows you to set the global window dimensions which are used for the various window write, and cursor positioning routines. window(wrow1,wcol1,wrow2,wcol2); int wrow1 Value to set upper left row int wcol1 Value to set upper left col int wrow2 Value to set lower right row int wcol2 Value to set lower right col 46. WPRINTF Printf function relative to window This routine provides for a printf that allows color and relativity to the current window dimension. It handles all data types except float. It does not allow redirection. wprintf("\n%d %c %s",wint,wchar,wstring); int wint Sample integer int wchar Sample char int wstring Sample string 47. WSEARCH Search for a window Search for a specified window number and return it's pointer wptr = wsearch(wnum); TWINDOW *wptr Returned pointer to window structure. Should be checked for null in case window is not found int wnum Number of the window to search for. KEYBOARD ROUTINES 1. JZINKEY Return the char and scan code of a key This routine waits until a key is pressed and returns it's character and scan code. The character can be examined and if it is 0, the key was one of the special function keys, cursor keys, alt sequences, or shift sequences. wch = jzinkey(&wscan); int wch Returned character that was pressed int wscan Scan code of character that was pressed. 2. JZKEYPRS Return 1 if a key is waiting This routine determines whether a key was pressed by calling a bios function to see whether a key is in the keyboard buffer. wkeypressed = jzkeyprs(); int wkeypressed Returns 1 if a key is pressed, otherwise 0 3. JZKEYSTS Return the keyboard status record This routine returns a keyboard status record which can be looked at to determine which special keys are down such as insert, caps-lock, num-lock etc. jzkeysts(&wkey); TKEY wkey Pointer to record containing key status info. EX. #include <jaz.h> main() { KEYSTATE wkey; jzkeysts(&wkey); /* get key status */ if (wkey.s.capslock) printf("\nCaps lock is on!"); } 4. JZPUTKBD Write chars to the keyboard buffer This function is capable of writing a string to the keyboard buffer. A maximum of 16 chars will be written. jzputkbd(wstr); char *wstr String of chars to be written. If an extended char is to be written to the buffer, proceed it's scan code with a \xFF. i.e. jzputkbd("\xFF\x3B") would put the F1 key in the buffer. (0x3b is the scan code for the F1 key) MISC MACROS 1. LPOINTER Gain access to far memory locations. (JAZ.H) This macro allows access to far memory locations for useful in hardware intensize applications. wch = LPOINTER(char , wseg , wofs); char *wch Pointer to whatever type is specified type char This would be any valid type int wseg Segment value to get pointer for int wofs Offset value to get pointer for 2. MEMB Gain access to far char locations (JAZ.H) This macro allows access to far memory locations. wch = MEMB(wseg,wofs); int wch Value returned from pointer int wseg Segment value to point to int wofs Offset value to point to 3. MEMW Gain access to far word locations (JAZ.H) This macro allows access to far memory locations. wch = MEMW(wseg,wofs); int wch Value returned from pointer int wseg Segment value to point to int wofs Offset value to point to 4. MEML Gain access to far long locations (JAZ.H) This macro allows access to far memory locations. wch = MEML(wseg,wofs); long wch Value returned from pointer int wseg Segment value to point to int wofs Offset value to point to 5. SCROFS Convert row and column position to a screen offset (JZSCREEN.H) This macro converts row and column to an absolute screen offset. wofs = SCROFS(wrow,wcol); int wofs Returned offset int wrow row position int wcol Column position 6. MKATTR Make a color attribute given fore and back ground. (JZSCREEN.H) This macro converts a foreground and background color to a video attribute useful in many of the screen functions. wattr = MKATTR(wback,wfore); int wattr Returned video attribute int wback Background color int wfore Foreground color 7. CNTCOL Centering fields (JZSCREEN.H) This macro returns a column position with which to center a string in a given width. wcol = CNTCOL(wstr,wwidth); int wcol Returned centered column char *wstr String to provide centered column for int wwidth Width of field. 8. CLEARKBD Clear the keyboard buffer (KEYS.H) This macro clears the keyboard buffer CLEARKBD 9. MSDOS Provide an msdos function. (JAZ.H) This macro simulates the msdos call like in Turbo Pascal. MSDOS(&wreg); TREG wreg Pointer to structure of a register record. DEMO PROGRAMS Note: When compiling and linking these routines, make sure to use a compile spec similar to this : \msc\msc /Ox /Ze /Zp /I c:\msc\jaz %1/DLINT_ARGS; The "/Ze","/Zp" are absolutely neccessary for many of these programs. The link spec is not as critical (see link.bat) but many of the routines require a larger stack than the default. (Especially the interrupt handlers) Failure to use a large enough stack will result in the system hanging in many cases. -Jaz 1. BADSECT Check and List bad sectors on A: 2. COPYFILE Copy one file to another. Wildcards are supported. The syntax is COPYFILE <source spec> <destin spec> 3. DIRLST Demonstration of a disk directory places in a binary tree and printed out. Use "/st:12000" when linking 4. JAZPRINT Print multiple files with formatting. Demo of directory routines as well as buffer stream printing. formatting options. -d specifies double strike printing -e specifies emphasized printing -t specifies title of document + time and date -w specifies wide (compressed) listing -n specifies to number the lines -u specifies user chars to send (in hex). i.e jazprint *.* -u 1b471b45 -mn specifies multiple copies where n is the number of copies 5. JZBACKGR This program plays a dumb tune in the background of a DBASE like editing screen. It is a good demo of interrupt handlers, Input screens, and the sound routines. 6. JZBIGLTR Demonstration of big printing. 7. JZCHKDSK Program is similar to chkdsk but with many option. It will report on contiguous files/non contiguous files, bad sectors, etc. Link with "/ST:12000" Usage: JZCHKDSK <Options> <Path> Options: -c List contiguous files -n List non - contiguous files only -q Quiet mode. Don't list files at all -b List Bad Sectors 8. JZCLOCK This program puts a resident clock on the screen in the upper right hand corner. It takes up a LOT of memory but is mainly a demo just to prove it can be done in MS-C. When I have 4.0, I will probably be able to significantly reduce the size of the resident code. Must be linked with "/ST:12000" 9. JZDIR Incomplete demo of directly reading disk directory sectors. 10. JZDIRLST Demo of sorted directory with binary tree. Link with "/st:12000" 11. JZEDTCHR Demonstration of how to access the character set in rom. This routine allows you to edit and change the upper 128 characters and install a pointer to your buffer. Use font.chr (a sample script char set) and have fun. Link with "/st:12000" 12. JZFIND This program finds files across sub-directories. It supports wild-cards in the file searches. i.e. jzfind *.doc 13. JZMENU Incomplete demo of menu routines and menu drivers. 14. MENU Simple demo of the jzmenu() function. 15. JZPSHDIR Demonstration of the jzpshdir,jzpopdir. This routine expects an A drive, B drive and C drive with the b:drive having a subdirectory named test. This routine simply does a few directory changes , pushing the dirs beforehand and poping them back to change directories and drives. 16. JZPUSH Simple demo of data conversion using jzpush and jzpop. 17. JZPUTKBD Demonstration of the jzputkbd routine allowing characters to be "written" to the keyboard buffer on IBM and close compatibles. 18. JZSCREEN Demo of big letters. Prints command line on screen. 19. JZSEARCH Search multiple files for the occurance of strings. Usage JZSEARCH [-uwcr] [filespec] [search string\\replace string] Options are as follows:\n"); -u Uppercase (Ignores case on search) -c Display files on console -w Whole words only. "MEM" won't be found in "MEMORY" -r Replace string if found. Syntax for this is:" -p Prompt for change before replacing 20. JZSETATR Allows setting attributes of files. Supports wildcards. Syntax is JZSETATR <file spec> <attribute> 21. POPDIR Stand alone popdir program. Uses a virtual stack technique. 22. PUSHDIR Stand alone pushdir program. Uses a virtual stack technique. 23. RENFILE Allows renaming of files across subdirecties. Allows wildcards. This one is not thouroghly tested yet so make sure you have a backup before proceeding here! USAGE: renfile <old path\\old name> <new path> 24. SCREEN Demo of various screen and window related functions. This program is obsolete. Do NOT compile it. Run only if you received the executable along with the source. Calling conventions of many of the routines have changed since this was written. 25. TRUNCFIL Demo program to truncate a file. You specify the file name, the original size, and the new size. 26. VIEW This is a read only edit that saves the users screen before running. This means when you exit, your screen will appear just as it did before this program was run. 27. WINDOW This program demonstrates many of the screen and windowing functions available in the system. However the window moving is not very smooth at this point. I will be working on that very soon.