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/* Copyright (c) 1987 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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|
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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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* 10/5/88 |
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*/ |
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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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editline(buf, c_get, s_put) /* edit input line */ |
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char *buf; |
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int (*c_get)(), (*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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} |
