95 lines
2.1 KiB
C++
95 lines
2.1 KiB
C++
/*
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* \brief Log output service for Core
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* \author Norman Feske
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* \date 2006-09-15
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*/
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/*
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* Copyright (C) 2006-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _CORE__INCLUDE__LOG_SESSION_COMPONENT_H_
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#define _CORE__INCLUDE__LOG_SESSION_COMPONENT_H_
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#include <util/string.h>
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#include <base/printf.h>
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#include <base/rpc_server.h>
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#include <log_session/log_session.h>
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namespace Genode {
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class Log_session_component : public Rpc_object<Log_session>
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{
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public:
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enum { LABEL_LEN = 64 };
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private:
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char _label[LABEL_LEN];
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public:
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/**
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* Constructor
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*/
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Log_session_component(const char *label) {
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strncpy(_label, label, sizeof(_label)); }
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/*****************
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** Log session **
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*****************/
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size_t write(String const &string_buf)
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{
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if (!(string_buf.is_valid_string())) {
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PERR("corrupted string");
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return 0;
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}
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char const *string = string_buf.string();
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size_t len = strlen(string);
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/*
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* Heuristic: The Log console implementation flushes
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* the output preferably in front of escape
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* sequences. If the line contains only
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* the escape sequence, we skip the printing
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* of the label and cut the line break (last
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* character).
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*/
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enum { ESC = 27 };
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if ((string[0] == ESC) && (len == 5) && (string[4] == '\n')) {
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char buf[5];
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strncpy(buf, string, 5);
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printf("%s", buf);
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return len;
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}
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char buf[string_buf.MAX_SIZE];
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unsigned from_i = 0;
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for (unsigned i = 0; i < len; i++) {
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if (string[i] == '\n') {
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memcpy(buf, string + from_i, i - from_i);
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buf[i - from_i] = 0;
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printf("[%s] %s\n", _label, buf);
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from_i = i + 1;
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}
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}
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/* if last character of string was not a line break, add one */
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if (from_i < len)
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printf("[%s] %s\n", _label, string + from_i);
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return len;
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}
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};
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}
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#endif /* _CORE__INCLUDE__LOG_SESSION_COMPONENT_H_ */
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