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92eb0760 1/*
2 * $Source$
3 * $Author$
4 * $Header$
5 *
6 * Copyright (C) 1987 by the Massachusetts Institute of Technology
babbc197 7 * For copying and distribution information, please see the file
8 * <mit-copyright.h>.
83e80378 9 *
92eb0760 10 */
11
12#ifndef lint
13static char *rcsid_sms_query_c = "$Header$";
14#endif lint
15
babbc197 16#include <mit-copyright.h>
8defc06b 17#include "mr_private.h"
8fd777cf 18#include <string.h>
92eb0760 19
83e80378 20/*
8defc06b 21 * This routine is the primary external interface to the mr library.
83e80378 22 *
23 * It builds a new argument vector with the query handle prepended,
8defc06b 24 * and calls mr_query_internal.
83e80378 25 */
4bff4d9d 26int level = 0;
83e80378 27
8defc06b 28int mr_query(name, argc, argv, callproc, callarg)
83e80378 29 char *name; /* Query name */
30 int argc; /* Arg count */
31 char **argv; /* Args */
32 int (*callproc)(); /* Callback procedure */
33 char *callarg; /* Callback argument */
92eb0760 34{
83e80378 35 register char **nargv = (char **)malloc(sizeof(char *) * (argc+1));
36 register int status = 0;
37 nargv[0] = name;
8fd777cf 38 memcpy((char *)(nargv+1), (char *)argv, sizeof(char *) * argc);
8defc06b 39 status = mr_query_internal(argc+1, nargv, callproc, callarg);
83e80378 40 free(nargv);
41 return status;
42}
43/*
8defc06b 44 * This routine makes an MR query.
83e80378 45 *
46 * argv[0] is the query name.
47 * argv[1..argc-1] are the query arguments.
48 *
49 * callproc is called once for each returned value, with arguments
50 * argc, argv, and callarg.
51 * If it returns a non-zero value, further calls to it are not done, and
52 * all future data from the server is ignored (there should be some
53 * way to send it a quench..)
54 */
92eb0760 55
8defc06b 56int mr_query_internal(argc, argv, callproc, callarg)
83e80378 57 int argc; /* Arg count */
58 char **argv; /* Args */
59 int (*callproc)(); /* Callback procedure */
60 char *callarg; /* Callback argument */
61{
62 int status;
8defc06b 63 mr_params params_st;
64 register mr_params *params = NULL;
65 mr_params *reply = NULL;
83e80378 66 int stopcallbacks = 0;
4bff4d9d 67
8defc06b 68 if (level) return MR_QUERY_NOT_REENTRANT;
83e80378 69
70 CHECK_CONNECTED;
d0dbd4ea 71 level++;
92eb0760 72
89371417 73 params = &params_st;
8defc06b 74 params->mr_version_no = sending_version_no;
75 params->mr_procno = MR_QUERY;
76 params->mr_argc = argc;
77 params->mr_argl = NULL;
78 params->mr_argv = argv;
92eb0760 79
8defc06b 80 if ((status = mr_do_call(params, &reply)))
83e80378 81 goto punt;
92eb0760 82
8defc06b 83 while ((status = reply->mr_status) == MR_MORE_DATA) {
83e80378 84 if (!stopcallbacks)
85 stopcallbacks =
8defc06b 86 (*callproc)(reply->mr_argc, reply->mr_argv, callarg);
87 mr_destroy_reply(reply);
83e80378 88 reply = NULL;
89
8defc06b 90 initialize_operation(_mr_recv_op, mr_start_recv, &reply,
83e80378 91 (int (*)())NULL);
8defc06b 92 queue_operation(_mr_conn, CON_INPUT, _mr_recv_op);
83e80378 93
8defc06b 94 mr_complete_operation(_mr_recv_op);
95 if (OP_STATUS(_mr_recv_op) != OP_COMPLETE) {
96 mr_disconnect();
97 status = MR_ABORTED;
4bff4d9d 98 goto punt_1;
92eb0760 99 }
83e80378 100 }
101punt:
8defc06b 102 mr_destroy_reply(reply);
4bff4d9d 103punt_1:
104 level--;
83e80378 105 return status;
92eb0760 106}
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