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60 lines
1.0 KiB
60 lines
1.0 KiB
// operator>>.
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// General includes.
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#include "cl_sysdep.h"
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// Specification.
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#include "cln/string.h"
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// Implementation.
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#include "cln/io.h"
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#include "cl_spushstring.h"
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#include <cctype>
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namespace cln {
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std::istream& operator>> (std::istream& stream, cl_string& str)
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{
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var cl_spushstring buffer;
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var int n = stream.width();
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// Handling of eofp is tricky: EOF is reached when (!stream.good()) || (stream.get()==EOF).
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int c;
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// Skip whitespace.
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while (stream.good()) {
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c = stream.get();
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if (c==EOF)
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break;
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if (!isspace(c)) {
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if (--n == 0) {
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// stream.width()==1, means no characters.
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stream.unget();
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break;
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}
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// If stream.width()==0, n gets negative and never 0.
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goto nonws;
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}
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}
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goto done;
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// Read non-whitespace.
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while (stream.good()) {
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c = stream.get();
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if (c==EOF)
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break;
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if (isspace(c)) {
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stream.unget();
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break;
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}
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nonws:
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buffer.push(c);
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if (--n == 0)
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break;
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}
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done:
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str = buffer.contents();
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stream.width(0);
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return stream;
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}
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} // namespace cln
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