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#ifndef lint
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static const char RCSid[] = "$Id$";
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#endif
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/*
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* editline.c - routine for editing raw input for rview.
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*
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* External symbols declared in driver.h
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*/
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#include "copyright.h"
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#include "color.h"
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#include "driver.h"
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#define iscntrl(c) ((c) < ' ')
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#define isblank(c) ((c) == ' ')
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#define iserase(c) ((c) == '\b' || (c) == 127)
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#define iswerase(c) ((c) == 'W'-'@')
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#define iskill(c) ((c) == 'U'-'@' || (c) == 'X'-'@')
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void
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editline(buf, c_get, s_put) /* edit input line */
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char *buf;
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int (*c_get)();
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void (*s_put)();
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{
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static char erases[] = "\b \b";
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static char obuf[4];
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register int i;
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register int c;
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i = 0;
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while ((c = (*c_get)()&0177) != '\n' && c != '\r')
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if (iserase(c)) { /* single char erase */
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if (i > 0) {
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(*s_put)(erases);
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--i;
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}
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} else if (iswerase(c)) { /* word erase */
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while (i > 0 && isblank(buf[i-1])) {
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(*s_put)(erases);
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--i;
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}
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while (i > 0 && !isblank(buf[i-1])) {
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(*s_put)(erases);
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--i;
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}
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} else if (iskill(c)) { /* kill line */
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while (i > 0) {
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(*s_put)(erases);
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--i;
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}
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} else if (iscntrl(c)) { /* control char */
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i = 0;
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buf[i++] = c;
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obuf[0] = '^'; obuf[1] = c|0100; obuf[2] = '\0';
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(*s_put)(obuf);
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break;
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} else { /* regular char */
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buf[i++] = c;
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obuf[0] = c; obuf[1] = '\0';
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(*s_put)(obuf);
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}
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buf[i] = '\0';
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(*s_put)("\n");
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}
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static char mybuf[512];
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void
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tocombuf(b, d) /* add command(s) to my buffer */
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register char *b;
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register struct driver *d;
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{
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register char *cp;
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char *comstart;
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for (cp = mybuf; *cp; cp++)
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;
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comstart = cp;
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while (*cp++ = *b)
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if (cp >= mybuf+sizeof(mybuf)) {
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*comstart = '\0';
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return; /* what should I do about this? */
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} else if (*b++ == '\n') {
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d->inpready++;
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comstart = cp;
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}
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}
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int
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fromcombuf(b, d) /* get command from my buffer */
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char *b;
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struct driver *d;
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{
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register char *cp;
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/* get next command */
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for (cp = mybuf; *cp != '\n'; cp++)
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if (!*cp)
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return(0);
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*cp++ = '\0';
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#ifdef DEBUG
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(*d->comout)(mybuf); /* echo my command */
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(*d->comout)("\n");
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#endif
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/* send it as reply */
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strcpy(b, mybuf);
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d->inpready--;
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/* advance commands */
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strcpy(mybuf, cp);
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return(1);
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}
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