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/* Copyright (c) 1989 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* fgetline.c - read line with escaped newlines |
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* fgetline.c - read line with escaped newlines. |
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* |
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* 10/4/89 |
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* External symbols declared in rtio.h |
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*/ |
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#include <stdio.h> |
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#include "copyright.h" |
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#include "rtio.h" |
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char * |
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fgetline(s, n, fp) /* read in line with escapes, elide final newline */ |
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char *s; |
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register int n; |
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FILE *fp; |
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int n; |
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register FILE *fp; |
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{ |
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register char *cp; |
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register int c; |
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register char *cp = s; |
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register int c = EOF; |
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|
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cp = s; |
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while (--n > 0 && (c = getc(fp)) != EOF && c != '\n') { |
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if (c == '\\') { |
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if ((c = getc(fp)) == EOF) |
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break; |
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} |
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while (--n > 0 && (c = getc(fp)) != EOF) { |
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if (c == '\r') |
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continue; |
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if (c == '\n' && (cp == s || cp[-1] != '\\')) |
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break; |
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*cp++ = c; |
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} |
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if (cp == s) |
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if (cp == s && c == EOF) |
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return(NULL); |
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*cp++ = '\0'; |
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*cp = '\0'; |
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return(s); |
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} |
