sohara@lamont.ldgo.columbia.edu (suzanne ohara) (10/17/90)
I am learning to program with motif and have run into what seems a very simple problem. I have not been able to find a way to convert a motif XmString to a regular C char string. Is this possible? I would appreciate any suggestions. Thank you, Suzanne O'Hara
bazavan@hpcilzb.HP.COM (Valentin Bazavan) (10/17/90)
Use XmStringGetLtoR. For instance:
char *s;
XmString xmstr;
/* Create a compound string */
xmstr = XmStringCreateLtoR("Hello", XmSTRING_DEFAULT_CHARSET);
/* Get the text segment of the compound string */
XmStringGetLtoR(xmstr, XmSTRING_DEFAULT_CHARSET, &s);
Valentin Bazavanjordan@morgan.COM (Jordan Hayes) (10/17/90)
Suzanne O'Hara <sohara@lamont.ldgo.columbia.edu> asks:
I am learning to program with motif and have run into what
seems a very simple problem. I have not been able to find a way
to convert a motif XmString to a regular C char string.
This should work:
----- cut here -----
#include <Xm/Xm.h>
char *
XmStringGet(w, str)
Widget w; /* widget that owns the XmString */
XmString str; /* the XmString itself */
{
char *text, *buf;
Boolean sep;
XmStringContext context;
XmStringDirection dir;
XmStringCharSet set;
if (XmStringInitContext(&context, str) == FALSE) {
XtAppWarning(XtWidgetToApplicationContext(w),
"couldn't initialize context!\n");
return((char *)NULL);
}
buf = (char *)NULL;
while (XmStringGetNextSegment(context, &text, &set, &dir, &sep)) {
if (sep)
break;
if (text == (char *)NULL || *text == (char)NULL)
continue;
if (buf) {
buf = XtRealloc(buf, strlen(buf) + strlen(text) + 2);
(void)strcat(buf, text);
} else
buf = XtNewString(text);
}
XmStringFreeContext(context);
return(buf);
}
----- cut here -----
/jordanachan@sparkle.nec.com (Amy Chan) (10/17/90)
In article <2863@lamont.ldgo.columbia.edu> sohara@lamont.ldgo.columbia.edu (suzanne ohara) writes: >I am learning to program with motif and have run into what >seems a very simple problem. I have not been able to find >a way to convert a motif XmString to a regular C char string. >Is this possible? I would appreciate any suggestions. > A function called XmStringGetLtoR will search for a text segment in the input compound string that matches the given character set identifier. Amy Chan achan@tdd.sj.nec.com
nazgul@alphalpha.com (Kee Hinckley) (10/18/90)
In article <2863@lamont.ldgo.columbia.edu> sohara@lamont.ldgo.columbia.edu (suzanne ohara) writes: >seems a very simple problem. I have not been able to find >a way to convert a motif XmString to a regular C char string. XmStringGetLtoR(). Don't free the value - it's a pointer to the internal representation. -- Alphalpha Software, Inc. | motif-request@alphalpha.com nazgul@alphalpha.com |----------------------------------- 617/646-7703 (voice/fax) | Proline BBS: 617/641-3722 I'm not sure which upsets me more; that people are so unwilling to accept responsibility for their own actions, or that they are so eager to regulate everyone else's.
marbru@auto-trol.UUCP (Martin Brunecky) (10/18/90)
In article <2863@lamont.ldgo.columbia.edu> sohara@lamont.ldgo.columbia.edu (suzanne ohara) writes: >I am learning to program with motif and have run into what >seems a very simple problem. I have not been able to find >a way to convert a motif XmString to a regular C char string. >Is this possible? I would appreciate any suggestions. > No, it should NOT be possible, as XmString may contain multibyte characters, i.e. potential imbeded NUL characters. In practice, however, you could do it assuming that you only have 8bit characters, or your multibyte characters don't have any NUL bytes ... Then, also note there is XConsortium document defining Compound Strings, and that is what XmString (in my naivity) should become (but I am not sure it already happened). -- =*= Opinions presented here are solely of my own and not those of Auto-trol =*= Martin Brunecky [BORN TO BASH UIL] marbru@auto-trol.COM (303) 252-2499 {...}ncar!ico!auto-trol!marbru Auto-trol Technology Corp. 12500 North Washington St., Denver, CO 80241-2404
dbrooks@osf.osf.org (David Brooks) (10/18/90)
Suzanne O'Hara <sohara@lamont.ldgo.columbia.edu> asks: I am learning to program with motif and have run into what seems a very simple problem. I have not been able to find a way to convert a motif XmString to a regular C char string. If you are interested only in left-to-right segments, you can use: result = XmStringGetLtoR(cstring, charset, &charp); Remember to XtFree(charp) when you no longer need it. -- David Brooks dbrooks@osf.org Systems Engineering, OSF uunet!osf.org!dbrooks
mago@delphi.it (Giovanni Beani) (10/18/90)
In some article, i2unix!lamont!sohara (suzanne ohara) writes: >I am learning to program with motif and have run into what >seems a very simple problem. I have not been able to find >a way to convert a motif XmString to a regular C char string. >Is this possible? I would appreciate any suggestions. >Thank you, >Suzanne O'Hara This is a way to do that: ----- Begin Included Message ----- static char *xm_string_to_string(cs) XmString cs; { XmStringContext context; XmStringCharSet charset; XmStringDirection direction; Boolean separator; static char *primitive_string; XmStringInitContext (&context,cs); XmStringGetNextSegment (context,&primitive_string, &charset,&direction,&separator); XmStringFreeContext (context); return ((char *) primitive_string); } ----- End Included Message ----- Bye Bye Giovanni ----- Giovanni Beani DELPHI S.p.A. "Research Engineering Phone: +39 (584)395225 EMail: gbeani@delphi.uucp & Development Division" Fax : +39 (584)395366 Via Vetraia 11 - 55049 Tlx : 501542 DELPHI I Viareggio (LUCCA) ITALY
nazgul@alphalpha.com (Kee Hinckley) (10/18/90)
In article <15121@paperboy.OSF.ORG> dbrooks@osf.org (David Brooks) writes: > result = XmStringGetLtoR(cstring, charset, &charp); > >Remember to XtFree(charp) when you no longer need it. Whoops. I said exactly the opposite. David's right, I'm wrong. -- Alphalpha Software, Inc. | motif-request@alphalpha.com nazgul@alphalpha.com |----------------------------------- 617/646-7703 (voice/fax) | Proline BBS: 617/641-3722 I'm not sure which upsets me more; that people are so unwilling to accept responsibility for their own actions, or that they are so eager to regulate everyone else's.
jordan@morgan.COM (Jordan Hayes) (10/19/90)
Suzanne O'Hara <sohara@lamont.ldgo.columbia.edu> asks:
I am learning to program with motif and have run into what
seems a very simple problem. I have not been able to find a way
to convert a motif XmString to a regular C char string.
To which David Brooks <dbrooks@osf.org> writes:
If you are interested only in left-to-right segments, you can use:
result = XmStringGetLtoR(cstring, charset, &charp);
I have always seen this defined as
Boolean
XmStringGetLtoR(string, charset, text)
XmString string;
XmStringCharSet charset;
char **text;
My understanding of XmStringGetLtoR is used to search `string' to see
if there is a segment that matches `text' and if so, returns TRUE. I
believe she wanted the "opposite" of XmStringCreate ... if this (when
*text == (char *)NULL) *is* the equivalent of what I posted yesterday,
please document it better!
/jordannazgul@alphalpha.com (Kee Hinckley) (10/20/90)
In article <9010191623.AA03058@s6.Morgan.COM> jordan@morgan.COM (Jordan Hayes) writes: >XmStringGetLtoR(string, charset, text) > XmString string; > XmStringCharSet charset; > char **text; > >My understanding of XmStringGetLtoR is used to search `string' to see >if there is a segment that matches `text' and if so, returns TRUE. I No, it searches the string and returns a pointer to the first segment that matches charset. Note that since \n is represented by a separator this means it only returns the first line, so your solution (looping through the segments) is actually more generically correct if you don't know whether the value is multi-line or single line (or multi-font). However it assumes that you know what the charset is (or don't care). -kee -- Alphalpha Software, Inc. | motif-request@alphalpha.com nazgul@alphalpha.com |----------------------------------- 617/646-7703 (voice/fax) | Proline BBS: 617/641-3722 I'm not sure which upsets me more; that people are so unwilling to accept responsibility for their own actions, or that they are so eager to regulate everyone else's.