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/*
* tkTableCmd.c --
*
* This module implements command structure lookups.
*
* Copyright (c) 1997,1998 Jeffrey Hobbs
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
*/
#include "tkTableCmd.h"
/*
* Functions for handling custom options that use Cmd_Structs
*/
int
Cmd_OptionSet(ClientData clientData, Tcl_Interp *interp,
Tk_Window unused, char *value, char *widgRec, int offset)
{
Cmd_Struct *p = (Cmd_Struct *)clientData;
int mode = Cmd_GetValue(p,value);
if (!mode) {
Cmd_GetError(interp,p,value);
return TCL_ERROR;
}
*((int*)(widgRec+offset)) = mode;
return TCL_OK;
}
char *
Cmd_OptionGet(ClientData clientData, Tk_Window unused,
char *widgRec, int offset, Tcl_FreeProc **freeProcPtr)
{
Cmd_Struct *p = (Cmd_Struct *)clientData;
int mode = *((int*)(widgRec+offset));
return Cmd_GetName(p,mode);
}
/*
* Options for bits in an int
* This will set/clear one bit in an int, the specific bit
* being passed in clientData
*/
int
Cmd_BitSet(ClientData clientData, Tcl_Interp *interp,
Tk_Window unused, char *value, char *widgRec, int offset)
{
int mode;
if (Tcl_GetBoolean(interp, value, &mode) != TCL_OK) {
return TCL_ERROR;
}
if (mode) {
*((int*)(widgRec+offset)) |= (int)clientData;
} else {
*((int*)(widgRec+offset)) &= ~((int)clientData);
}
return TCL_OK;
}
char *
Cmd_BitGet(ClientData clientData, Tk_Window unused,
char *widgRec, int offset, Tcl_FreeProc **freeProcPtr)
{
return (*((int*)(widgRec+offset)) & (int) clientData)?"1":"0";
}
/*
* simple Cmd_Struct lookup functions
*/
char *
Cmd_GetName(const Cmd_Struct *cmds, int val)
{
for(;cmds->name && cmds->name[0];cmds++) {
if (cmds->value==val) return cmds->name;
}
return NULL;
}
int
Cmd_GetValue(const Cmd_Struct *cmds, const char *arg)
{
int len=strlen(arg);
for(;cmds->name && cmds->name[0];cmds++) {
if (!strncmp(cmds->name,arg,len)) return cmds->value;
}
return 0;
}
void
Cmd_GetError(Tcl_Interp *interp, const Cmd_Struct *cmds, const char *arg)
{
int i;
Tcl_AppendResult(interp, "bad option \"", arg, "\" must be ", (char *) 0);
for(i=0;cmds->name && cmds->name[0];cmds++,i++) {
Tcl_AppendResult(interp, (i?", ":""), cmds->name, (char *) 0);
}
}
/*
* Parses a command string passed in an arg comparing it with all the
* command strings in the command array. If it finds a string which is a
* unique identifier of one of the commands, returns the index . If none of
* the commands match, or the abbreviation is not unique, then it sets up
* the message accordingly and returns 0
*/
int
Cmd_Parse (Tcl_Interp *interp, Cmd_Struct *cmds, const char *arg)
{
int len = (int)strlen(arg);
Cmd_Struct *matched = (Cmd_Struct *) 0;
int err = 0;
Cmd_Struct *next = cmds;
while (*(next->name)) {
if (strncmp (next->name, arg, len) == 0) {
/* have we already matched this one if so make up an error message */
if (matched) {
if (!err) {
Tcl_AppendResult(interp, "ambiguous option \"", arg,
"\" could be ", matched->name, (char *) 0);
matched = next;
err = 1;
}
Tcl_AppendResult(interp, ", ", next->name, (char *) 0);
} else {
matched = next;
/* return on an exact match */
if (len == (int)strlen(next->name))
return matched->value;
}
}
next++;
}
/* did we get multiple possibilities */
if (err) return 0;
/* did we match any at all */
if (matched) {
return matched->value;
} else {
Tcl_AppendResult(interp, "bad option \"", arg, "\" must be ",
(char *) NULL);
next = cmds;
while (1) {
Tcl_AppendResult(interp, next->name, (char *) NULL);
/* the end of them all ? */
if (!*((++next)->name)) return 0;
/* or the last one at least */
if (*((next + 1)->name))
Tcl_AppendResult(interp, ", ", (char *) NULL);
else
Tcl_AppendResult(interp, " or ", (char *) NULL);
}
}
}
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