56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/*
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* Copyright (c) 1993 by the University of Southern California
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*
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* For copying and distribution information, please see the file
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* <usc-license.h>
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*/
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#include <usc-license.h>
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#include <ardp.h>
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#include <pfs.h>
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#include <pparse.h>
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#include <ctype.h> /* For isascii */
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/* isascii() is not provided in POSIX, so we just do it here. */
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#ifndef isascii
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#define isascii(c) ((unsigned)(c)<=0177)
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#endif
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/* XXX Assumes that the longest possible word we could read in is
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ARDP_PTXT_LEN_R. This is actually a bogus assumption; one can trigger the
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assertion by sending a packet with a first word longer than that.
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We don't cache the value returned from in_nextline() so it's safe to use
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static data. Keywords (1st word in a line) are never quoted; this is safe
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then.
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*/
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/* This function returns a pointer to internal data which will be overwritten
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on the next call to in_nextline().
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This function is used for lookahead in the parsing, and could be replaced
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with other routines to do that.
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*/
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char *
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in_nextline(INPUT oldin)
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{
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INPUT_ST in_st;
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INPUT in = &in_st;
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AUTOSTAT_CHARPP(bufp);
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char *cp; /* Pointer into the buffer*/
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int c;
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if (!*bufp) *bufp = stalloc(ARDP_PTXT_LEN_R);
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cp = *bufp;
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input_copy(oldin, in);
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if((c = in_readc(in)) == EOF) /* test for EOF */
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return NULL;
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while ((c != EOF) && isascii(c) && !isspace(c)) {
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*(cp++) = c;
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in_incc(in);
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c = in_readc(in);
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assert(cp - *bufp < p__bstsize(*bufp));
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}
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*cp = '\0';
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return *bufp;
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}
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