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Annotation of researchv9/X11/src/X.V11R1/lib/X/XGetProp.c, revision 1.1

1.1     ! root        1: #include "copyright.h"
        !             2: 
        !             3: /* $Header: XGetProp.c,v 11.10 87/09/11 08:04:23 toddb Exp $ */
        !             4: /* Copyright    Massachusetts Institute of Technology    1986  */
        !             5: 
        !             6: #define NEED_REPLIES
        !             7: #include "Xlibint.h"
        !             8: 
        !             9: int
        !            10: XGetWindowProperty(dpy, w, property, offset, length, delete, 
        !            11:        req_type, actual_type, actual_format, nitems, bytesafter, prop)
        !            12:     register Display *dpy;
        !            13:     Window w;
        !            14:     Atom property;
        !            15:     Bool delete;
        !            16:     Atom req_type;
        !            17:     Atom *actual_type;
        !            18:     int *actual_format;  /* 8, 16, or 32 */
        !            19:     long offset, length;
        !            20:     unsigned long *nitems;  /* # of 8-, 16-, or 32-bit entities */
        !            21:     long *bytesafter;
        !            22:     unsigned char **prop;
        !            23:     {
        !            24:     int errorstatus;
        !            25:     xGetPropertyReply reply;
        !            26:     register xGetPropertyReq *req;
        !            27:     LockDisplay(dpy);
        !            28:     GetReq (GetProperty, req);
        !            29:     req->window = w;
        !            30:     req->property = property;
        !            31:     req->type = req_type;
        !            32:     req->delete = delete;
        !            33:     req->longOffset = offset;
        !            34:     req->longLength = length;
        !            35:     
        !            36:     if (!(errorstatus = _XReply (dpy, (xReply *) &reply, 0, xFalse))) {
        !            37:        UnlockDisplay(dpy);
        !            38:        return (errorstatus);
        !            39:        }       
        !            40:     *actual_type = reply.propertyType;
        !            41:     *actual_format = reply.format;
        !            42:     *nitems = reply.nItems;
        !            43:     *bytesafter = reply.bytesAfter;
        !            44: 
        !            45:     *prop = NULL;
        !            46:     if (*nitems) switch (reply.format) {
        !            47:       long nbytes;
        !            48:       /* 
        !            49:        * One extra byte is malloced than is needed to contain the property
        !            50:        * data, but this last byte is null terminated and convenient for 
        !            51:        * returing string properties, so the client doesn't then have to 
        !            52:        * recopy the string to make it null terminated. 
        !            53:        */
        !            54:       case 8:
        !            55:        *prop = (unsigned char *) Xmalloc ((unsigned)reply.nItems + (unsigned)1);
        !            56:         _XReadPad (dpy, (char *) *prop, (long) reply.nItems);
        !            57:        (*prop)[reply.nItems] = '\0';
        !            58:         break;
        !            59: 
        !            60:       case 16:
        !            61:         /* XXX needs rethinking for BIGSHORTS */
        !            62:         nbytes = (long)reply.nItems << 1;
        !            63:         *prop = (unsigned char *) Xmalloc ((unsigned)nbytes + 1);
        !            64:         _XReadPad (dpy, (char *) *prop, nbytes);
        !            65:        (*prop)[nbytes] = '\0';
        !            66:         break;
        !            67: 
        !            68:       case 32:
        !            69:         nbytes = (long)reply.nItems << 2;
        !            70:         *prop = (unsigned char *) Xmalloc ((unsigned)nbytes + 1);
        !            71:         _XRead (dpy, (char *) *prop, (long)nbytes);
        !            72:        (*prop)[nbytes] = '\0';
        !            73:         break;
        !            74: 
        !            75:       default:
        !            76:        /*
        !            77:         * This part of the code should never be reached.  If it is, the server
        !            78:         * send back a property with an invalid format.  This is a
        !            79:         * BadImplementation error. 
        !            80:         */
        !            81: 
        !            82:         {
        !            83:            xError error;
        !            84: 
        !            85:            error.sequenceNumber = dpy->request;
        !            86:            error.type = X_Error;
        !            87:            error.majorCode = X_GetProperty;
        !            88:            error.minorCode = 0;
        !            89:            error.errorCode = BadImplementation;
        !            90:        
        !            91:            _XError(dpy, &error);
        !            92:        }
        !            93:        break;
        !            94:       }
        !            95:     UnlockDisplay(dpy);
        !            96:     SyncHandle();
        !            97:     return(Success);
        !            98: 
        !            99:     }
        !           100: 

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