mirror of
https://github.com/moses-smt/mosesdecoder.git
synced 2024-08-16 15:00:33 +03:00
524109e2ca
The purpose of this effort is to have options local to the individual translation task, so that they can be changed in the running system in a multi-threaded system.
53 lines
1.3 KiB
C++
53 lines
1.3 KiB
C++
#include "ContextParameters.h"
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#include "moses/Util.h"
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namespace Moses
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{
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ContextParameters::
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ContextParameters()
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: look_ahead(0), look_back(0)
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{ }
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bool
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ContextParameters::
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init(Parameter const& params)
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{
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look_back = look_ahead = 0;
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params.SetParameter(context_string, "context-string", std::string(""));
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std::string context_window;
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params.SetParameter(context_window, "context-window", std::string(""));
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if (context_window == "")
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return true;
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if (context_window.substr(0,3) == "all")
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{
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look_back = look_ahead = std::numeric_limits<size_t>::max();
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return true;
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}
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size_t p = context_window.find_first_of("0123456789");
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if (p == 0)
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look_back = look_ahead = atoi(context_window.c_str());
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if (p == 1) {
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if (context_window[0] == '-')
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look_back = atoi(context_window.substr(1).c_str());
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else if (context_window[0] == '+')
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look_ahead = atoi(context_window.substr(1).c_str());
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else
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UTIL_THROW2("Invalid specification of context window.");
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}
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if (p == 2) {
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if (context_window.substr(0,2) == "+-" ||
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context_window.substr(0,2) == "-+")
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look_back = look_ahead = atoi(context_window.substr(p).c_str());
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else
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UTIL_THROW2("Invalid specification of context window.");
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}
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return true;
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}
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}
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