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WN_GINT.C
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C/C++ Source or Header
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1991-01-14
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7KB
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152 lines
/*
** The Window BOSS's Data Clerk
** Copyright (c) 1988 - Philip A. Mongelluzzo
** All rights reserved.
**
** wn_gint - get integer from window with validation
**
** Copyright (c) 1988 - Philip A. Mongelluzzo
** All rights reserved.
**
*/
#include "windows.h" /* standard stuff */
/*
***********
* wn_gint *
***********
*/
/*
** wn_gint(fun,frm,fld,wn,row,col,prmpt,atrib,fill,value,fwidth,low,high,ubuff,hlpmsg,errmsg)
**
** int fun - fucntion code (SET || XEQ)
** (WIFORM) frm - form pointer (actual || NFRM)
** int fld - field # in form (actual || NFLD)
** (WINDOWPTR) wn - window pointer
** int row - row in window where data input begins
** int col - col in window where data input begins
** (char *) prmpt - field promt (call with NSTR for none)
** unsigned atrib - field (not prompt) atributes
** char fill - field fill character
** (int *) value - pointer to int for return value (low-high)
** int fwidth - width of mask (maximum # of digits is 6 with sign)
** int low - minimum value (lower limit of value)
** int high - maximum value (upper limit of value)
** (char *) ubuff - pointer to char array of 10 bytes for editing
** (char *)hlpmsg - pointer to help message (call with NSTR for none)
** (char *)errmsg - pointer to err message (call with NSTR) for none)
**
** RETURNS:
**
** VALUE via pointer.
**
** NULL if error, else the non zero value returned from wn_input.
**
** NOTES:
**
** FUN - fun can only be SET for form setup, or XEQ for immediate
** execution. When called with SET, valid arguements for both
** "frm" and "fld" must be specfied. frm is the field pointer
** returned from frmopn(), and fld is the field sequence number
** in the form for this field. When called with XEQ frm must
** be NFRM and fld must NFLD.
**
** UBUFF - Editing buffer. Must be of sufficent size to hold the
** data as it is entered. Typical value is the length
** of the mask + 2 bytes (strlen(mask)+2).
**
** On entry, the first byte of ubuff should be
** a null, otherwise wn_input assumes there is valid
** data there and will enter edit mode. This can be
** handy if there is a need for prefilled but editable
** fields. In actual pratice, wn_input uses this
** buffer for both initial character data entry and
** subsequent editing.
**
** On return, ubuff contains the actual data entered in
** character format with fill and mask characters as
** spaces (e.g. "-24000").
**
** Calls wn_input to perform data entry.
**
** Data must satisfy validation checks for function to return.
**
** Calls wn_iemsg(errmsg) when vaildation fails.
*/
wn_gint(fun,frm,fld,wn,row,col,prmpt,atrib,fill,value,fwidth,low,high,ubuff,hlpmsg,errmsg)
int fun; /* SET or XEQ */
WIFORM frm; /* form pointer or NFRM */
int fld; /* field number or NFLD */
WINDOWPTR wn; /* window to use */
int row, col; /* position of input field */
char *prmpt; /* prompt string */
unsigned atrib; /* data entry atribute */
char fill; /* fill char */
int *value, low, high; /* the int, limits: low & high */
int fwidth; /* field width */
char *ubuff; /* returns "value" */
char *hlpmsg,*errmsg; /* help & error messages */
{
long lv; /* temp value */
int v; /* ditto */
char mask[10]; /* single precision */
unsigned int r; /* sscanf return value */
int rv; /* return value */
if(fun != SET && fun != XEQ) /* saftey check */
if(frm[fld]->pself != (char *)frm[fld])
wns_ierr("wn_gint"); /* die if memory is mangled */
if(fun == SET) { /* set up */
if(frm[fld]->pself != (char *)frm[fld])
return(NULL);
frm[fld]->wn = wn; /* set window */
frm[fld]->row = row; /* set row */
frm[fld]->col = col; /* set col */
frm[fld]->prmpt = prmpt; /* set prompt */
frm[fld]->atrib = atrib; /* set attribute */
frm[fld]->fill = fill; /* set fill character */
frm[fld]->fcode = GINT; /* function code */
frm[fld]->v1.vip = value; /* &value */
frm[fld]->v2.vi = fwidth; /* fwidth */
frm[fld]->v3.vi = low; /* lower limit */
frm[fld]->v4.vi = high; /* upper limit */
frm[fld]->v5.vcp = ubuff; /* &ubuff */
frm[fld]->v6.vcp = hlpmsg; /* &hlpmsg */
frm[fld]->v7.vcp = errmsg; /* &errmsg */
return(TRUE);
}
strcpy(mask,"#######"); /* set mask */
if(fwidth > 6) { /* dont allow foolishness */
*ubuff = NUL; /* indicate error */
return(NULL); /* and return */
}
mask[fwidth] = NUL; /* set length */
begin:
if(!(rv=wn_input(wn,row,col,prmpt,mask,fill,atrib,ubuff,hlpmsg))) {
*ubuff= NUL; /* indicate error */
return(NULL); /* indicate error */
}
if(wni_frmflg) return(TRUE); /* wn_frmget in progress */
if(wns_escape) return(rv); /* escape pressed ?? */
r = sscanf(ubuff, "%ld", &lv); /* convert to long */
if(r == EOF || r == 0) lv = 0l; /* no data entered */
if(lv < -32768l || lv > 32767l) { /* range check data type */
wn_iemsg(errmsg); /* do error thing */
goto begin; /* start over */
}
v = (int)lv; /* convert to int */
if(v < low || v > high) { /* bad int */
wn_iemsg(errmsg); /* do error thing */
goto begin; /* and start over */
}
*value = v; /* load user value */
return(rv); /* all is well.. in gross sense */
}
/* End */