/* test.c tests out viewbrowser interface. two critical functions: Get_Subjects() --- gets a list of up to 4096 subjects and their corresponding transaction numbers. got everything working!!!! -- ukim */ #include #include #include "lucy.h" #include "params.h" #define False 0 #define True 1 typedef int Boolean; extern tfile unix_tfile(); struct browse_struct { char subject[LINE_SIZE]; int tnum; /* transaction number */ } browser[BROWSER_MAX]; /* up to 4096 possible transactions handled */ int num_browser = 0; /* keeps track of how many subjects are in the browser */ void Get_Subjects() /* works */ { int i; Boolean exit_flag; int cur_tnum, next_tnum; /* current and next transaction numbers */ ltrn *tran_info; /* transaction info structure */ int err_code; /* error code */ /* initialize luc_init() to get in touch with the browser meeting.*/ luc_init(); /* initialize lucy discuss meetings */ luv_curmtgp = &luv_bmtg; /* the current meeting will be the browser */ /* luv_curmtgp is a virtual constant after this point */ /* algo: get 1st transaction using luc_next(). and also get trn number for each transaction. iterate until no more transactions or browser is full */ /* am assuming that an error indicates that no more transactions are available */ num_browser = 0; /* initialize */ next_tnum = 0; /* next transaction number */ exit_flag = False; while (exit_flag == False) { cur_tnum = next_tnum; luc_next(luv_curmtgp, cur_tnum, &next_tnum); if (next_tnum != 0) { luc_trn_info(luv_curmtgp, next_tnum, &tran_info); /* assign data to browser */ strncpy(browser[num_browser].subject, tran_info->subject, 128); browser[num_browser].tnum = next_tnum; num_browser++; } else { /* no more transactions available */ #ifdef DEBUG_LUCY fprintf(stderr, "Get_Subjects: no more transactions available.\n"); #endif exit_flag = True; } if (num_browser == BROWSER_MAX) { #ifdef DEBUG_LUCY fprintf(stderr, "Get_Subjects: Browser is full.\n"); #endif exit_flag = True; } } /* end while */ } /* end Get_Subject() */ void Get_Transaction(int tnum, char buffer[], int buflen) /* retries the contents of a transaction, given the transaction number. buflen should be maximum size of buffer being passed. Be sure to call Get_Subjects() to initialize lucy meetings beforehand. */ { char tmpfname[LINE_SIZE]; /* name of temporary file */ FILE *tempfile; /* temporary file */ tfile tf; /* need a tfile store contents of transaction in */ int terror; /* place to hold error numbers that meetings server might return */ /* creat a tfile : create a temporary file, and open it. use unix_tfile to translate it into a tfile. call get_trn, then read the temporary file to output to fprintf */ tmpnam(tmpfname); /* create a temporary file name */ tempfile = freopen(tmpfname, "w+", stdout); if (tempfile == NULL) { #ifdef DEBUG_LUCY fprintf(stderr, "could not create a temporary file.\n"); #endif exit(1); } #ifdef DEBUG_LUCY fprintf(stderr, "creating unix wrapper \n"); #endif tf = unix_tfile(1); /* put a tfile wrapper around the tempfile */ #ifdef DEBUG_LUCY fprintf(stderr, "finished creating unix wrapper \n"); #endif dsc_get_trn(&(luv_curmtgp->nb), tnum, tf, &terror); #ifdef DEBUG_LUCY fprintf(stderr, "get_trn returned error code %d \n", terror); #endif tdestroy(tf); /* free the memory allocated to the tfile */ fclose(tempfile); /* flush out to disk before reading it back in */ /* need to close the file, to flush out the data, so that we can read it back in. */ /* read from buffer */ tempfile = fopen(tmpfname, "r"); fread(buffer, sizeof(char), buflen, tempfile); /* display transaction contents */ #ifdef DEBUG_LUCY fprintf(stderr, "Contents of transaction are \n%s\n--End of File--\n", buffer); #endif fclose(tempfile); unlink(tmpfname); /* get rid of our temporary file */ } /* end of get_transaction() */ prev_obsolete_code() { ltrn *tran_info; /* transaction info structure */ char subject[LINE_SIZE]; /* subject of transaction */ int next; int tnum; /* transaction number */ tfile tf; /* need a tfile store contents of transaction in */ int terror; /* place to hold error numbers that meetings server might return */ char buffer[QUESTION_SIZE]; /* place to hold contents of transaction */ char text[QUESTION_SIZE]; /* buffer for tfile */ char tmpfname[LINE_SIZE]; /* name of temporary file */ FILE *tempfile; /* temporary file */ luc_init(); /* initialize lucy discuss meetings */ luv_curmtgp = &luv_bmtg; /* the current meeting will be the browser */ luc_next(luv_curmtgp, 0, &next); /* get first (next) transaction. */ luc_trn_info(luv_curmtgp, next, &tran_info); strcpy(subject, tran_info->subject); tnum = tran_info->current; /* transaction number of current transaction */ #ifdef DEBUG_LUCY fprintf(stderr, "Subject of transaction: %s \n", subject); fprintf(stderr, "Transaction # is %d \n", tnum); #endif /* creat a tfile : create a temporary file, and open it. use unix_tfile to translate it into a tfile. call get_trn, then read the temporary file to output to fprintf */ tmpnam(tmpfname); /* create a temporary file name */ tempfile = freopen(tmpfname, "w+", stdout); if (tempfile == NULL) { #ifdef DEBUG_LUCY fprintf(stderr, "could not create a temporary file.\n"); #endif exit(1); } #ifdef DEBUG_LUCY fprintf(stderr, "creating unix wrapper \n"); #endif tf = unix_tfile(1); /* put a tfile wrapper around the tempfile */ #ifdef DEBUG_LUCY fprintf(stderr, "finished creating unix wrapper \n"); #endif dsc_get_trn(&(luv_curmtgp->nb), tnum, tf, &terror); #ifdef DEBUG_LUCY fprintf(stderr, "get_trn returned error code %d \n", terror); #endif tdestroy(tf); /* free the memory allocated to the tfile */ fclose(tempfile); /* flush out to disk before reading it back in */ /* need to close the file, to flush out the data, so that we can read it back in. */ /* read from buffer */ tempfile = fopen(tmpfname, "r"); fread(buffer, sizeof(char), 1024, tempfile); /* display transaction contents */ #ifdef DEBUG_LUCY fprintf(stderr, "Contents of transaction are \n%s\n--End of File--\n", buffer); #endif fclose(tempfile); unlink(tmpfname); /* get rid of our temporary file */ } /* main() { int i; int tnum; char buffer[QUESTION_SIZE]; Get_Subjects(); for (i=0; i %s\n", browser[i].tnum, browser[i].subject); #endif } i = 1; while (i != 0) { printf("Enter Transaction #: "); scanf("%d", &tnum); Get_Transaction(tnum, buffer, 1024); } } */