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726 lines
14 KiB
C
726 lines
14 KiB
C
/* input.c -- implements input.h */
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#include "input.h"
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/* input.c
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*
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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 <unistd.h>
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#include "estruct.h"
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#include "edef.h"
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#include "efunc.h"
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#include "wrapper.h"
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#if PKCODE
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#if MSDOS && TURBO
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#include <dir.h>
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#endif
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#endif
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#if PKCODE && (UNIX || (MSDOS && TURBO))
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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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/*
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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(char *prompt)
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{
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char c; /* input character */
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char buf[NPAT]; /* prompt to user */
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for (;;) {
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/* build and prompt the user */
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strcpy(buf, prompt);
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strcat(buf, " (y/n)? ");
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mlwrite(buf);
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/* get the responce */
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c = tgetc();
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if (c == ectoc(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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* 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 mlreply(char *prompt, char *buf, int nbuf)
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{
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return nextarg(prompt, buf, nbuf, ctoec('\n'));
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}
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int mlreplyt(char *prompt, char *buf, int nbuf, int eolchar)
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{
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return nextarg(prompt, buf, nbuf, eolchar);
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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 CONTROL and SPEC flags back into an ascii code
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*/
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int ectoc(int c)
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{
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if (c & CONTROL)
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c = c & ~(CONTROL | 0x40);
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if (c & SPEC)
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c = c & 255;
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return c;
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}
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/*
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* ctoec:
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* character to extended character
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* pull out the CONTROL and SPEC prefixes (if possible)
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*/
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int ctoec(int c)
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{
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if (c >= 0x00 && c <= 0x1F)
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c = CONTROL | (c + '@');
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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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fn_t getname(void)
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{
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int cpos; /* current column on screen output */
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int c;
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char *sp; /* pointer to string for output */
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struct name_bind *ffp; /* first ptr to entry in name binding table */
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struct name_bind *cffp; /* current ptr to entry in name binding table */
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struct name_bind *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 (macarg(buf) != TRUE)
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return NULL;
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return fncmatch(&buf[0]);
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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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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[0]);
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} else if (c == ectoc(abortc)) { /* Bell, abort */
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ctrlg(FALSE, 0);
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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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TTputc('\b');
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TTputc(' ');
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TTputc('\b');
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--ttcol;
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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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TTputc('\b');
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TTputc(' ');
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TTputc('\b');
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--cpos;
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--ttcol;
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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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ffp = &names[0]; /* scan for matches */
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while (ffp->n_func != NULL) {
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if (strncmp(buf, ffp->n_name, strlen(buf))
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== 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
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(buf, (ffp + 1)->n_name,
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strlen(buf)) != 0)) {
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/* no...we match, print it */
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sp = ffp->n_name + cpos;
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while (*sp)
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TTputc(*sp++);
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TTflush();
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return ffp->n_func;
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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 current input */
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lffp = (ffp + 1);
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while ((lffp +
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1)->n_func !=
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NULL) {
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if (strncmp
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(buf,
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(lffp +
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1)->n_name,
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strlen(buf))
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!= 0)
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break;
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++lffp;
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}
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/* and now, attempt to partial complete the string, 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] =
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ffp->
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n_name[cpos];
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/* scan through the candidates */
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cffp = ffp + 1;
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while (cffp <=
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lffp) {
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if (cffp->
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n_name
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[cpos]
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!=
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buf
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[cpos])
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goto onward;
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++cffp;
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}
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/* add the character */
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TTputc(buf
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[cpos++]);
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}
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/* << << << << << << << << << << << << << << << << << */
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}
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}
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++ffp;
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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 && c > ' ') {
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buf[cpos++] = c;
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TTputc(c);
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}
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++ttcol;
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TTflush();
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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 repitition? */
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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 prefixs legal here
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are the SPEC and CONTROL prefixes.
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*/
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int get1key(void)
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{
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int c;
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/* get a keystroke */
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c = tgetc();
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#if MSDOS
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if (c == 0) { /* Apply SPEC prefix */
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c = tgetc();
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if (c >= 0x00 && c <= 0x1F) /* control key? */
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c = CONTROL | (c + '@');
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return SPEC | c;
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}
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#endif
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if (c >= 0x00 && c <= 0x1F) /* C0 control -> C- */
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c = CONTROL | (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
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prefix keys
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*/
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int getcmd(void)
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{
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int c; /* fetched keystroke */
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#if VT220
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int d; /* second character P.K. */
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int cmask = 0;
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#endif
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/* get initial character */
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c = get1key();
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#if VT220
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proc_metac:
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#endif
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if (c == 128+27) /* CSI */
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goto handle_CSI;
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/* process META prefix */
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if (c == (CONTROL | '[')) {
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c = get1key();
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#if VT220
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if (c == '[' || c == 'O') { /* CSI P.K. */
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handle_CSI:
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c = get1key();
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if (c >= 'A' && c <= 'D')
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return SPEC | c | cmask;
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if (c >= 'E' && c <= 'z' && c != 'i' && c != 'c')
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return SPEC | c | cmask;
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d = get1key();
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if (d == '~') /* ESC [ n ~ P.K. */
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return SPEC | c | cmask;
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switch (c) { /* ESC [ n n ~ P.K. */
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case '1':
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c = d + 32;
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break;
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case '2':
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c = d + 48;
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break;
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case '3':
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c = d + 64;
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break;
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default:
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c = '?';
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break;
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}
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if (d != '~') /* eat tilde P.K. */
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get1key();
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if (c == 'i') { /* DO key P.K. */
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c = ctlxc;
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goto proc_ctlxc;
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} else if (c == 'c') /* ESC key P.K. */
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c = get1key();
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else
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return SPEC | c | cmask;
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}
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#endif
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#if VT220
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if (c == (CONTROL | '[')) {
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cmask = META;
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goto proc_metac;
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}
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#endif
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if (islower(c)) /* Force to upper */
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c ^= DIFCASE;
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if (c >= 0x00 && c <= 0x1F) /* control key */
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c = CONTROL | (c + '@');
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return META | c;
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}
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#if PKCODE
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else if (c == metac) {
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c = get1key();
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#if VT220
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if (c == (CONTROL | '[')) {
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cmask = META;
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goto proc_metac;
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}
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#endif
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if (islower(c)) /* Force to upper */
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c ^= DIFCASE;
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if (c >= 0x00 && c <= 0x1F) /* control key */
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c = CONTROL | (c + '@');
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return META | c;
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}
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#endif
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#if VT220
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proc_ctlxc:
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#endif
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/* process CTLX prefix */
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if (c == ctlxc) {
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c = get1key();
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#if VT220
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if (c == (CONTROL | '[')) {
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cmask = CTLX;
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goto proc_metac;
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}
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#endif
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if (c >= 'a' && c <= 'z') /* Force to upper */
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c -= 0x20;
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if (c >= 0x00 && c <= 0x1F) /* control key */
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c = CONTROL | (c + '@');
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return CTLX | c;
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}
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/* otherwise, just return it */
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return c;
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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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int getstring(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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int quotef; /* are we quoting the next char? */
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#if COMPLC
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int ffile, 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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ffile = (strcmp(prompt, "Find file: ") == 0
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|| strcmp(prompt, "View file: ") == 0
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|| strcmp(prompt, "Insert file: ") == 0
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|| strcmp(prompt, "Write file: ") == 0
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|| strcmp(prompt, "Read file: ") == 0
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|| strcmp(prompt, "File to execute: ") == 0);
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#endif
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cpos = 0;
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quotef = FALSE;
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/* prompt the user for the input string */
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mlwrite(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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c = get1key();
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/* If it is a <ret>, change it to a <NL> */
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#if PKCODE
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if (c == (CONTROL | 0x4d) && !quotef)
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#else
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if (c == (CONTROL | 0x4d))
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#endif
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c = CONTROL | 0x40 | '\n';
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/* if they hit the line terminate, wrap it up */
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if (c == eolchar && quotef == FALSE) {
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buf[cpos++] = 0;
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/* clear the message line */
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mlwrite("");
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TTflush();
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/* if we default the buffer, return FALSE */
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if (buf[0] == 0)
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return FALSE;
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return TRUE;
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}
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/* change from command form back to character form */
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c = ectoc(c);
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if (c == ectoc(abortc) && quotef == FALSE) {
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/* Abort the input? */
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ctrlg(FALSE, 0);
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TTflush();
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return ABORT;
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} else if ((c == 0x7F || c == 0x08) && quotef == FALSE) {
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/* rubout/erase */
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if (cpos != 0) {
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outstring("\b \b");
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--ttcol;
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if (buf[--cpos] < 0x20) {
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outstring("\b \b");
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--ttcol;
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}
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if (buf[cpos] == '\n') {
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outstring("\b\b \b\b");
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ttcol -= 2;
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}
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TTflush();
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}
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} else if (c == 0x15 && quotef == FALSE) {
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/* C-U, kill */
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while (cpos != 0) {
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outstring("\b \b");
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--ttcol;
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if (buf[--cpos] < 0x20) {
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outstring("\b \b");
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--ttcol;
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}
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if (buf[cpos] == '\n') {
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outstring("\b\b \b\b");
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ttcol -= 2;
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}
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}
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TTflush();
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#if COMPLC
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} else if ((c == 0x09 || c == ' ') && quotef == FALSE
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&& ffile) {
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/* TAB, complete file name */
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char ffbuf[255];
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#if MSDOS
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char sffbuf[128];
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int lsav = -1;
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#endif
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int n, iswild = 0;
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didtry = 1;
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ocpos = cpos;
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while (cpos != 0) {
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outstring("\b \b");
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--ttcol;
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if (buf[--cpos] < 0x20) {
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outstring("\b \b");
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--ttcol;
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}
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if (buf[cpos] == '\n') {
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outstring("\b\b \b\b");
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ttcol -= 2;
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}
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if (buf[cpos] == '*' || buf[cpos] == '?')
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iswild = 1;
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#if MSDOS
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if (lsav < 0 && (buf[cpos] == '\\' ||
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buf[cpos] == '/' ||
|
|
buf[cpos] == ':'
|
|
&& cpos == 1))
|
|
lsav = cpos;
|
|
#endif
|
|
}
|
|
TTflush();
|
|
if (nskip < 0) {
|
|
buf[ocpos] = 0;
|
|
#if UNIX
|
|
if (tmpf != NULL)
|
|
fclose(tmpf);
|
|
strcpy(tmp, "/tmp/meXXXXXX");
|
|
strcpy(ffbuf, "echo ");
|
|
strcat(ffbuf, buf);
|
|
if (!iswild)
|
|
strcat(ffbuf, "*");
|
|
strcat(ffbuf, " >");
|
|
xmkstemp(tmp);
|
|
strcat(ffbuf, tmp);
|
|
strcat(ffbuf, " 2>&1");
|
|
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++) {
|
|
c = buf[n];
|
|
if ((c < ' ') && (c != '\n')) {
|
|
outstring("^");
|
|
++ttcol;
|
|
c ^= 0x40;
|
|
}
|
|
|
|
if (c != '\n') {
|
|
if (disinp)
|
|
TTputc(c);
|
|
} else { /* put out <NL> for <ret> */
|
|
outstring("<NL>");
|
|
ttcol += 3;
|
|
}
|
|
++ttcol;
|
|
}
|
|
TTflush();
|
|
#if UNIX
|
|
rewind(tmpf);
|
|
unlink(tmp);
|
|
#endif
|
|
#endif
|
|
|
|
} else if ((c == quotec || c == 0x16) && quotef == FALSE) {
|
|
quotef = TRUE;
|
|
} else {
|
|
quotef = FALSE;
|
|
if (cpos < nbuf - 1) {
|
|
buf[cpos++] = c;
|
|
|
|
if ((c < ' ') && (c != '\n')) {
|
|
outstring("^");
|
|
++ttcol;
|
|
c ^= 0x40;
|
|
}
|
|
|
|
if (c != '\n') {
|
|
if (disinp)
|
|
TTputc(c);
|
|
} else { /* put out <NL> for <ret> */
|
|
outstring("<NL>");
|
|
ttcol += 3;
|
|
}
|
|
++ttcol;
|
|
TTflush();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* output a string of characters
|
|
*
|
|
* char *s; string to output
|
|
*/
|
|
void outstring(char *s)
|
|
{
|
|
if (disinp)
|
|
while (*s)
|
|
TTputc(*s++);
|
|
}
|
|
|
|
/*
|
|
* output a string of output characters
|
|
*
|
|
* char *s; string to output
|
|
*/
|
|
void ostring(char *s)
|
|
{
|
|
if (discmd)
|
|
while (*s)
|
|
TTputc(*s++);
|
|
}
|