mirror of
https://github.com/rfivet/uemacs.git
synced 2024-11-15 17:16:48 -05:00
Renaud Fivet
50b727bf7f
Emphasize which one always return TRUE. Use mloutfail() to introduce consistency when a function fails with error message.
705 lines
17 KiB
C
705 lines
17 KiB
C
/* input.c -- implements input.h */
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#include "input.h"
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/* Various input routines
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*
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* written by Daniel Lawrence 5/9/86
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* modified by Petri Kutvonen
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "bind.h"
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#include "estruct.h"
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#include "bindable.h"
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#include "display.h" /* rubout(), echos(), echoc(), update() */
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#include "exec.h"
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#include "isa.h"
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#include "mlout.h"
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#include "names.h"
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#include "terminal.h"
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#include "utf8.h"
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#include "wrapper.h"
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#if PKCODE && UNIX
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#define COMPLC 1
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#else
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#define COMPLC 0
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#endif
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#define NKBDM 256 /* # of strokes, keyboard macro */
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int kbdm[ NKBDM] ; /* Macro */
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int *kbdptr ; /* current position in keyboard buf */
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int *kbdend = &kbdm[0] ; /* ptr to end of the keyboard */
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kbdstate kbdmode = STOP ; /* current keyboard macro mode */
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int lastkey = 0 ; /* last keystoke */
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int kbdrep = 0 ; /* number of repetitions */
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int metac = CTL_ | '[' ; /* current meta character */
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int ctlxc = CTL_ | 'X' ; /* current control X prefix char */
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int reptc = CTL_ | 'U' ; /* current universal repeat char */
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int abortc = CTL_ | 'G' ; /* current abort command char */
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const int nlc = CTL_ | 'J' ; /* end of input char */
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void ue_system( const char *cmd) {
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int ret ;
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ret = system( cmd) ;
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if( ret == -1) {
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/* some actual handling needed here */
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}
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}
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/*
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* Ask a yes or no question in the message line. Return either TRUE, FALSE, or
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* ABORT. The ABORT status is returned if the user bumps out of the question
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* with a ^G. Used any time a confirmation is required.
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*/
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int mlyesno( const char *prompt)
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{
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int c ; /* input character */
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for (;;) {
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/* prompt the user */
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mloutfmt( "%s (y/n)? ", prompt) ;
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/* get the response */
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c = get1key() ;
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if( c == abortc) /* Bail out! */
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return ABORT;
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if (c == 'y' || c == 'Y')
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return TRUE;
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if (c == 'n' || c == 'N')
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return FALSE;
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}
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}
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/*
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* newnextarg:
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* get the next argument
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*
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* char **outbufref ; buffer to put token into
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* const char *prompt ; prompt to use if we must be interactive
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* int size ; size of the buffer
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* int terminator ; terminating char to be used on interactive fetch
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*/
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static int newnextarg( char **outbufref, const char *prompt, int size,
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int terminator) {
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int status ;
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char *buf ;
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/* if we are interactive, go get it! */
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if( clexec == FALSE) {
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if( size <= 1) {
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size = term.t_ncol - strlen( prompt) + 1 ;
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if( size < 24)
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size = 24 ;
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}
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buf = malloc( size) ;
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if( buf == NULL)
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status = FALSE ;
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else {
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status = getstring( prompt, buf, size, terminator) ;
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if( TRUE != status) {
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free( buf) ;
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buf = NULL ;
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}
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}
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} else {
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buf = getnewtokval() ;
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status = (buf == NULL) ? FALSE : TRUE ;
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}
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*outbufref = buf ;
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return status ;
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}
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/*
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* Write a prompt into the message line, then read back a response. Keep
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* track of the physical position of the cursor. If we are in a keyboard
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* macro throw the prompt away, and return the remembered response. This
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* lets macros run at full speed. The reply is always terminated by a carriage
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* return. Handle erase, kill, and abort keys.
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*/
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int newmlarg( char **outbufref, const char *prompt, int size) {
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return newnextarg( outbufref, prompt, size, nlc) ;
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}
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int newmlargt( char **outbufref, const char *prompt, int size) {
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return newnextarg( outbufref, prompt, size, metac) ;
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}
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/*
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* ectoc:
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* expanded character to character
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* collapse the CTL_ and SPEC flags back into an ascii code
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*/
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int ectoc( int c) {
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if( c & CTL_)
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c ^= CTL_ | 0x40 ;
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if( c & SPEC)
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c &= 255 ;
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return c ;
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}
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/*
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* get a command name from the command line. Command completion means
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* that pressing a <SPACE> will attempt to complete an unfinished command
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* name if it is unique.
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*/
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nbind_p getname( void) {
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int cpos; /* current column on screen output */
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nbind_p ffp; /* first ptr to entry in name binding table */
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nbind_p cffp; /* current ptr to entry in name binding table */
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nbind_p lffp; /* last ptr to entry in name binding table */
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char buf[NSTRING]; /* buffer to hold tentative command name */
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/* starting at the beginning of the string buffer */
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cpos = 0;
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/* if we are executing a command line get the next arg and match it */
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if (clexec) {
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if( TRUE != gettokval( buf, sizeof buf))
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return NULL;
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return fncmatch( buf) ;
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}
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/* build a name string from the keyboard */
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while (TRUE) {
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int c ;
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c = tgetc();
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/* if we are at the end, just match it */
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if (c == 0x0d) {
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buf[cpos] = 0;
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/* and match it off */
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return fncmatch( buf) ;
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} else if( c == ectoc(abortc)) { /* Bell, abort */
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ctrlg( FALSE, 1) ;
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TTflush() ;
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return NULL ;
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} else if (c == 0x7F || c == 0x08) { /* rubout/erase */
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if (cpos != 0) {
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rubout() ;
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--cpos;
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TTflush();
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}
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} else if (c == 0x15) { /* C-U, kill */
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while (cpos != 0) {
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rubout() ;
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--cpos;
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}
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TTflush();
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} else if (c == ' ' || c == 0x1b || c == 0x09) {
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/* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */
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/* attempt a completion */
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buf[ cpos] = 0 ; /* terminate it for us */
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int buflen = strlen( buf) ;
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/* scan for matches */
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for( ffp = names ; ffp->n_func != NULL ; ffp++) {
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if( strncmp( buf, bind_name( ffp), buflen) == 0) {
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/* a possible match! More than one? */
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if( (ffp + 1)->n_func == NULL ||
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(strncmp( buf, bind_name( ffp + 1), buflen) != 0)) {
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/* no...we match, print it */
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echos( &bind_name( ffp)[ cpos]) ;
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TTflush() ;
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return ffp ;
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} else {
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/* << << << << << << << << << << << << << << << << << */
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/* try for a partial match against the list */
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/* first scan down until we no longer match the
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* current input */
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for( lffp = ffp + 1 ; (lffp + 1)->n_func != NULL ;
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lffp++)
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if( strncmp( buf, bind_name( lffp + 1),
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buflen) != 0)
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break ;
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/* and now, attempt to partial complete the string,
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* one char at a time */
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while (TRUE) {
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/* add the next char in */
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buf[ cpos] = bind_name( ffp)[ cpos] ;
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/* scan through the candidates */
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for( cffp = ffp + 1 ; cffp <= lffp ; cffp++)
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if( bind_name( cffp)[ cpos] != buf[ cpos])
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goto onward ;
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/* add the character */
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echoc( buf[ cpos++]) ;
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}
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/* << << << << << << << << << << << << << << << << << */
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}
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}
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}
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/* no match.....beep and onward */
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TTbeep();
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onward:
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TTflush();
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/* <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< */
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} else {
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if( cpos < NSTRING - 1 && (islower( c) || c == '-')) {
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buf[cpos++] = c;
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echoc( c) ;
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TTflush();
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}
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}
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}
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}
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/* tgetc: Get a key from the terminal driver, resolve any keyboard
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macro action */
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int tgetc(void)
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{
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int c; /* fetched character */
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/* if we are playing a keyboard macro back, */
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if (kbdmode == PLAY) {
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/* if there is some left... */
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if (kbdptr < kbdend)
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return (int) *kbdptr++;
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/* at the end of last repetition? */
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if (--kbdrep < 1) {
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kbdmode = STOP;
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#if VISMAC == 0
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/* force a screen update after all is done */
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update(FALSE);
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#endif
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} else {
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/* reset the macro to the begining for the next rep */
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kbdptr = &kbdm[0];
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return (int) *kbdptr++;
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}
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}
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/* fetch a character from the terminal driver */
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c = TTgetc();
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/* record it for $lastkey */
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lastkey = c;
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/* save it if we need to */
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if (kbdmode == RECORD) {
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*kbdptr++ = c;
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kbdend = kbdptr;
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/* don't overrun the buffer */
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if (kbdptr == &kbdm[NKBDM - 1]) {
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kbdmode = STOP;
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TTbeep();
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}
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}
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/* and finally give the char back */
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return c;
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}
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/* GET1KEY: Get one keystroke. The only prefixes legal here are the SPEC
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and CTL_ prefixes. */
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static int get1unicode( int *up) {
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/* Accept UTF-8 sequence */
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int bytes ;
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int c = tgetc() ;
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if( c > 0xC1 && c <= 0xF4) {
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char utf[ 4] ;
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char cc ;
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utf[ 0] = c ;
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utf[ 1] = cc = tgetc() ;
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if( (c & 0x20) && ((cc & 0xC0) == 0x80)) { /* at least 3 bytes and a valid encoded char */
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utf[ 2] = cc = tgetc() ;
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if( (c & 0x10) && ((cc & 0xC0) == 0x80)) /* at least 4 bytes and a valid encoded char */
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utf[ 3] = tgetc() ;
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}
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bytes = utf8_to_unicode( utf, 0, sizeof utf, (unicode_t *) up) ;
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} else {
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if( (c >= 0x00 && c <= 0x1F) || c == 0x7F) /* C0 control -> C- */
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c ^= CTL_ | 0x40 ;
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*up = c ;
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bytes = 1 ;
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}
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return bytes ;
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}
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/* Terminal sequences need up to 7 read ahead characters */
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#define STACKSIZE 7
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static int keystack[ STACKSIZE] ;
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static int *stackptr = &keystack[ STACKSIZE] ;
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#define KPUSH( c) *(--stackptr) = (c)
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int get1key( void) {
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int c ;
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/* fetch from queue if any were pushed back */
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if( stackptr != &keystack[ STACKSIZE])
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return *(stackptr++) ;
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/* fetch from keyboard */
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get1unicode( &c) ;
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return c ;
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}
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/* GETCMD: Get a command from the keyboard. Process all applicable prefix
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keys. Handle alted and controlled FNx, not shifted.
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*/
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int getcmd( void) {
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int prefix = 0 ; /* prefixes M- or ^X */
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int keyread[ STACKSIZE] ; /* room to process sequences like ^[[24;2~ */
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int *kptr = keyread ;
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int c ;
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for( ;;) {
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c = *(kptr++) = get1key() ;
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if( c == 0x9B)
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goto foundCSI ;
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else if( c == (CTL_ | '[')) {
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/* fetch terminal sequence */
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c = *(kptr++) = get1key() ;
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if( c == 'O') { /* F1 .. F4 */
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c = *(kptr++) = get1key() ;
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if( c >= 'P' && c <= 'S')
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return c | SPEC | prefix ;
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} else if( c == '[') {
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int v1, v ; /* ^[[v1;v~ or ^[[v~ */
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foundCSI:
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v1 = v = 0 ;
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while( kptr < &keyread[ STACKSIZE]) {
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c = *(kptr++) = get1key() ;
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if( (c == '~')
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|| (c >= 'A' && c <= 'Z')
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|| (c >= 'a' && c <= 'z')) {
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/* Found end of sequence */
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int mask = prefix ;
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if( v1) { /* Handle ALT/CTL, not SHFT */
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if( (v - 1) & 2)
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mask = META ;
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if( (v - 1) & 4)
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mask |= CTL_ ;
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v = v1 ;
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}
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if( c == '~') {
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if( v)
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c = v + ((v <= 9) ? '0' : 'a' - 10) ;
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else
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break ;
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}
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return c | SPEC | mask ;
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} else if( c == ';') { /* Start of SHFT/ALT/CTL state */
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v1 = v ;
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v = 0 ;
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} else if( c >= '0' && c <= '9')
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v = v * 10 + c - '0' ;
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else
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break ;
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}
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}
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/* not a match, unget the keys read so far */
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while( kptr > keyread)
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KPUSH( *(--kptr)) ;
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c = get1key() ;
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} else
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kptr-- ;
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if( c == metac) {
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prefix = META ;
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} else if( c == ctlxc) {
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if( prefix)
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break ; /* ^X^X or M-^X */
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else
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prefix = CTLX ;
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} else
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break ;
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}
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if( prefix && islower( c))
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c = flipcase( c) ;
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return c | prefix ;
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}
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/* A more generalized prompt/reply function allowing the caller
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to specify the proper terminator. If the terminator is not
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a return ('\n') it will echo as "<NL>"
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*/
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static void echov( int c) {
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/* verbose echo of a character */
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if( c == '\n') /* put out <NL> for <ret> */
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echos( "<NL>") ;
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else {
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if( c < ' ' || c == 0x7F) {
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echoc( '^') ;
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c ^= 0x40 ;
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}
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echoc( c) ;
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}
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}
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static void rubc( int c) {
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rubout() ;
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if( (c >= 0 && c < ' ') || c == 0x7F) {
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/* ^x range */
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rubout() ;
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if( c == '\n') { /* <NL> */
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rubout() ;
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rubout() ;
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}
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} else if( utf8_width( c) == 2)
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rubout() ;
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}
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int getstring( const char *prompt, char *buf, int nbuf, int eolchar)
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{
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int cpos; /* current character position in string */
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int c;
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boolean quote_f ; /* are we quoting the next char? */
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int retval ; /* TRUE, FALSE, ABORT */
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#if COMPLC
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boolean file_f ;
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int ocpos, nskip = 0, didtry = 0;
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#if MSDOS
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struct ffblk ffblk;
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char *fcp;
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#endif
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#if UNIX
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static char tmp[] = "/tmp/meXXXXXX";
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FILE *tmpf = NULL;
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#endif
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/* Look for "find-file: ", "View file: ", "Insert file: ", "Write file: ",
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** "Read file: ", "Execute file: " */
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file_f = NULL != strstr( prompt, "file: ") ;
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#endif
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cpos = 0;
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quote_f = FALSE;
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/* prompt the user for the input string */
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mloutstr( prompt);
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for (;;) {
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#if COMPLC
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if (!didtry)
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nskip = -1;
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didtry = 0;
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#endif
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/* get a character from the user */
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int bytes = get1unicode( &c) ;
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/* Quoting? Store as it is */
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if( quote_f == TRUE) {
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quote_f = FALSE ;
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if( cpos < nbuf - bytes) {
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c = ectoc( c) ;
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cpos += unicode_to_utf8( c, &buf[ cpos]) ;
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echov( c) ;
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TTflush() ;
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}
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continue ;
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}
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/* If it is a <ret>, change it to a <NL> */
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if( c == (CTL_ | 'M'))
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c = CTL_ | 0x40 | '\n' ;
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if( c == eolchar) {
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/* if they hit the line terminator, wrap it up */
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buf[ cpos] = 0 ;
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/* clear the message line */
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mloutstr( "") ;
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/* if we default the buffer, return FALSE */
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retval = cpos != 0 ;
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break ;
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} else if( c == abortc) {
|
|
/* Abort the input? */
|
|
retval = ctrlg( FALSE, 1) ;
|
|
break ;
|
|
}
|
|
|
|
/* change from command form back to character form */
|
|
c = ectoc( c) ;
|
|
|
|
if( c == 0x7F || c == 0x08) {
|
|
/* rubout/erase */
|
|
if (cpos != 0) {
|
|
int c ;
|
|
|
|
cpos -= 1 ;
|
|
cpos -= utf8_revdelta( (unsigned char *) &buf[ cpos], cpos) ;
|
|
utf8_to_unicode( &buf[ cpos], 0, 4, (unicode_t *) &c) ;
|
|
rubc( c) ;
|
|
TTflush();
|
|
}
|
|
} else if( c == 0x15) {
|
|
/* C-U, kill */
|
|
mloutstr( prompt) ;
|
|
cpos = 0 ;
|
|
#if COMPLC
|
|
} else if( (c == 0x09 || c == ' ') && file_f) {
|
|
/* TAB, complete file name */
|
|
char ffbuf[255];
|
|
#if MSDOS
|
|
char sffbuf[128];
|
|
int lsav = -1;
|
|
#endif
|
|
int n, iswild = 0;
|
|
|
|
didtry = 1;
|
|
ocpos = cpos;
|
|
mloutstr( prompt) ;
|
|
while( cpos != 0) {
|
|
c = buf[ --cpos] ;
|
|
if( c == '*' || c == '?') {
|
|
iswild = 1 ;
|
|
cpos = 0 ;
|
|
break ;
|
|
}
|
|
}
|
|
|
|
if (nskip < 0) {
|
|
buf[ocpos] = 0;
|
|
#if UNIX
|
|
if (tmpf != NULL) {
|
|
fclose(tmpf);
|
|
tmpf = NULL ;
|
|
unlink( tmp) ;
|
|
}
|
|
|
|
strcpy( tmp, "/tmp/meXXXXXX") ;
|
|
xmkstemp( tmp) ;
|
|
if( strlen( buf) < sizeof ffbuf - 26 - 1)
|
|
sprintf( ffbuf, "echo %s%s >%s 2>&1", buf,
|
|
!iswild ? "*" : "", tmp) ;
|
|
else
|
|
sprintf( ffbuf, "echo ERROR >%s 2>&1", tmp) ;
|
|
|
|
ue_system( ffbuf) ;
|
|
tmpf = fopen(tmp, "r");
|
|
#endif
|
|
#if MSDOS
|
|
strcpy(sffbuf, buf);
|
|
if (!iswild)
|
|
strcat(sffbuf, "*.*");
|
|
#endif
|
|
nskip = 0;
|
|
}
|
|
#if UNIX
|
|
c = ' ';
|
|
for (n = nskip; n > 0; n--)
|
|
while ((c = getc(tmpf)) != EOF
|
|
&& c != ' ');
|
|
#endif
|
|
#if MSDOS
|
|
if (nskip == 0) {
|
|
strcpy(ffbuf, sffbuf);
|
|
c = findfirst(ffbuf, &ffblk,
|
|
FA_DIREC) ? '*' : ' ';
|
|
} else if (nskip > 0)
|
|
c = findnext(&ffblk) ? 0 : ' ';
|
|
#endif
|
|
nskip++;
|
|
|
|
if (c != ' ') {
|
|
TTbeep();
|
|
nskip = 0;
|
|
}
|
|
#if UNIX
|
|
while ((c = getc(tmpf)) != EOF && c != '\n'
|
|
&& c != ' ' && c != '*')
|
|
#endif
|
|
#if MSDOS
|
|
if (c == '*')
|
|
fcp = sffbuf;
|
|
else {
|
|
strncpy(buf, sffbuf, lsav + 1);
|
|
cpos = lsav + 1;
|
|
fcp = ffblk.ff_name;
|
|
}
|
|
while (c != 0 && (c = *fcp++) != 0 && c != '*')
|
|
#endif
|
|
{
|
|
if (cpos < nbuf - 1)
|
|
buf[cpos++] = c;
|
|
}
|
|
#if UNIX
|
|
if (c == '*')
|
|
TTbeep();
|
|
#endif
|
|
|
|
for( n = 0 ; n < cpos ; ) {
|
|
n += utf8_to_unicode( buf, n, nbuf, (unicode_t *) &c) ;
|
|
echov( c) ;
|
|
}
|
|
|
|
TTflush() ;
|
|
#if UNIX
|
|
rewind(tmpf);
|
|
#endif
|
|
#endif
|
|
|
|
} else if( c == 0x11 || c == 0x16)
|
|
/* ^Q or ^V */
|
|
quote_f = TRUE ;
|
|
else {
|
|
/* store as it is */
|
|
if( cpos + bytes < nbuf) {
|
|
cpos += unicode_to_utf8( c, &buf[ cpos]) ;
|
|
echov( c) ;
|
|
TTflush() ;
|
|
}
|
|
}
|
|
}
|
|
|
|
TTflush() ;
|
|
if( tmpf != NULL) {
|
|
fclose( tmpf) ;
|
|
unlink( tmp) ;
|
|
}
|
|
|
|
return retval ;
|
|
}
|
|
|
|
/* end of input.c */
|