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greg |
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/* Copyright (c) 1987 Regents of the University of California */ |
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/* SCCSid "$SunId$ LBL" */ |
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/* |
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* driver.h - header file for interactive device drivers. |
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* |
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* 2/2/87 |
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*/ |
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struct driver { /* driver functions */ |
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int (*close)(); /* close device */ |
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int (*clear)(); /* clear device */ |
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int (*paintr)(); /* paint rectangle */ |
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int (*getcur)(); /* get cursor position */ |
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int (*comout)(); /* command line output */ |
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int (*comin)(); /* command line input */ |
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int xsiz, ysiz; /* device size */ |
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int inpready; /* input ready on device */ |
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}; |
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extern int stderr_v(); /* error vectors */ |
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extern int (*wrnvec)(), (*errvec)(), (*cmdvec)(); |
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extern struct driver *comm_init(); /* stream interface */ |
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/* stream commands */ |
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#define COM_CLEAR 0 |
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#define COM_PAINTR 1 |
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#define COM_GETCUR 2 |
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#define COM_COMOUT 3 |
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#define COM_COMIN 4 |
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#define NREQUESTS 5 /* number of valid requests */ |
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struct device { /* interactive device */ |
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char *name; /* device name */ |
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char *descrip; /* description */ |
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struct driver *(*init)(); /* initialize device */ |
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}; |
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extern struct device devtable[]; /* supported devices */ |
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#define MB1 ('\n') /* mouse button 1 */ |
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#define MB2 ('\r') /* mouse button 2 */ |
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#define MB3 (' ') /* mouse button 3 */ |
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#define ABORT ('C'-'@') /* abort key */ |
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#define MAXRES 4000 /* preposterous display resolution */ |
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/* |
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* struct driver * |
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* dname_init(name) |
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* char *name; |
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* { |
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* Initialize device and return pointer to driver |
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* functions. Returns NULL if an error occurred. |
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* The name string is used to identify the client. |
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* A device can be open by at most one client. |
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* Be verbose in error reports; call stderr_v(). |
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greg |
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* If device has its own error output, set errvec, |
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* cmdvec and wrnvec. |
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greg |
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* } |
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* (*dev->close)() |
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* { |
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greg |
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* Close the device. Reset error vectors. |
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greg |
1.1 |
* } |
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* (*dev->clear)(xres, yres) |
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* int xres, yres; |
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* { |
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* Clear the device for xres by yres output. This call will |
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greg |
1.1 |
* be made prior to any output. |
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* } |
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* (*dev->paintr)(col, xmin, ymin, xmax, ymax) |
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* COLOR col; |
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* int xmin, ymin, xmax, ymax; |
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* { |
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* Paint a half-open rectangle from (xmin,ymin) to (xmax,ymax) |
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* with the color col. Can call repaint() if necessary. |
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* } |
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* (*dev->getcur)(xp, yp) |
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* int *xp, *yp; |
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* { |
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* Get the cursor position entered by the user via mouse, |
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* joystick, etc. Return the key hit by the user (usually |
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* MB1 or MB2). Return ABORT to cancel. |
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* Can be NULL for devices without this capability. |
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* } |
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* (*dev->comout)(out) |
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* char *out; |
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* { |
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* Print the string out on the device command line. If the |
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* string ends with '\n', the message is considered complete, |
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* and the next call can erase it. |
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* } |
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* (*dev->comin)(in) |
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* char *in; |
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* { |
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* Read an edited input string from the command line. If |
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* an unrecognized control character is entered, terminate |
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* input and return the string with only that character. |
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* The input string should not contain a newline. |
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* Must work in consort with comout. |
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* } |
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* xsiz, ysiz |
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* The maximum allowable x and y dimensions. If any |
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* size is allowable, these should be set to MAXRES. |
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* inpready |
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greg |
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* This variable should be made positive asynchronously |
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* when characters are ready on the input. (Often easiest |
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* to check for input during calls to paintr.) |
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greg |
1.1 |
*/ |
