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#ifndef lint |
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static const char RCSid[] = "$Id: editline.c,v 2.6 2003/06/30 19:04:29 greg Exp $"; |
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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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|
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#include "copyright.h" |
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|
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#include <stdio.h> |
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|
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#include "color.h" |
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|
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#include "driver.h" |
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|
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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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|
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|
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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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|
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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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|
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|
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static char mybuf[512]; |
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|
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|
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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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|
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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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|
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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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} |
