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#ifndef lint
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static const char RCSid[] = "$Id: fgetword.c,v 2.8 2017/08/10 19:10:44 greg Exp $";
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#endif
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/*
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* Read white space separated words from stream
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*
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* External symbols declared in rtio.h
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*/
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#include "copyright.h"
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#include "rtio.h"
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#include <ctype.h>
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#define isquote(c) (((c) == '"') | ((c) == '\''))
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char *
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fgetword( /* get (quoted) word up to n-1 characters */
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char *s,
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int n,
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FILE *fp
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)
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{
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int quote = '\0';
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char *cp;
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int c;
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/* sanity checks */
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if ((s == NULL) | (n < 2))
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return(NULL);
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/* skip initial white space */
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do
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c = getc(fp);
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while (isspace(c));
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/* check for quote */
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if (isquote(c)) {
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quote = c;
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c = getc(fp);
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}
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cp = s; /* get actual word */
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while (c != EOF) {
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if (c == quote) /* end quote? */
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quote = '\0';
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else if (!quote && isquote(c))
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quote = c; /* started new quote */
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else {
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if (!quote && isspace(c))
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break; /* end of word */
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if (--n <= 0)
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break; /* hit length limit */
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*cp++ = c;
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}
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c = getc(fp); /* get next character */
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}
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*cp = '\0';
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if ((c == EOF) & (cp == s)) /* hit end-of-file? */
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return(NULL);
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return(s);
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}
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