43 lines
882 B
C++
43 lines
882 B
C++
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#include <string>
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#include "contexthandler.h"
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ContextMatch ContextHandler::getContext(
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char *s,
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int len,
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char *origin,
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int context)
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{
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char *t, *u;
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int maxrange = context * 20;
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int range = context + 1, i = 0;
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for (t = s; t != origin; --t)
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if (*t == ' ' || *t == '\t' || *t == '\r' || *t == '\n')
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if (++i == range)
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{
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++t;
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break;
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}
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i = 0;
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for (u = s + len; *u; ++u)
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if (*u == ' ' || *u == '\t' || *u == '\r' || *u == '\n')
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if (++i == range)
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break;
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ContextMatch match;
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// prevent excessive context
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if ((s - t) < maxrange)
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match.prelog.assign(t, s - t);
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else
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match.prelog = "...";
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match.match.assign(s, len);
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if ((u - s) < maxrange)
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match.postlog.assign(s + len, u - (s + len));
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else
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match.postlog = "...";
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return match;
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}
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