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121 lines
3.6 KiB
C++
121 lines
3.6 KiB
C++
/**
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* Copyright (c) 2015, Timothy Stack
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Timothy Stack nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @file time-extension-functions.cc
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*/
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#include "config.h"
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <stdint.h>
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#include <string>
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#include <stddef.h>
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#include "lnav_util.hh"
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#include "sql_util.hh"
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#include "relative_time.hh"
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#include "sqlite3.h"
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#include "sqlite-extension-func.h"
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static void timeslice(sqlite3_context *context,
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int argc, sqlite3_value **argv)
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{
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relative_time::parse_error pe;
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const char *slice_in, *time_in;
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date_time_scanner dts;
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relative_time rt;
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time_t now;
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time(&now);
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dts.set_base_time(now);
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if (sqlite3_value_type(argv[0]) == SQLITE_NULL ||
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sqlite3_value_type(argv[1]) == SQLITE_NULL) {
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sqlite3_result_null(context);
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return;
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}
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time_in = (const char *)sqlite3_value_text(argv[0]);
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slice_in = (const char *)sqlite3_value_text(argv[1]);
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if (!rt.parse(slice_in, strlen(slice_in), pe)) {
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sqlite3_result_error(context, "unable to parse time slice value", -1);
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return;
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}
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if (rt.empty()) {
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sqlite3_result_error(context, "no time slice value given", -1);
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return;
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}
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if (rt.is_absolute()) {
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sqlite3_result_error(context, "absolute time slices are not valid", -1);
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return;
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}
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struct exttm tm;
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struct timeval tv;
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if (dts.scan(time_in, strlen(time_in), NULL, &tm, tv) == NULL) {
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sqlite3_result_error(context, "unable to parse time value", -1);
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return;
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}
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int64_t us = tv.tv_sec * 1000 * 1000 + tv.tv_usec, remainder;
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remainder = us % rt.to_microseconds();
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us -= remainder;
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tv.tv_sec = us / (1000 * 1000);
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tv.tv_usec = us % (1000 * 1000);
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char ts[64];
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ssize_t tslen = sql_strftime(ts, sizeof(ts), tv);
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sqlite3_result_text(context, ts, tslen, SQLITE_TRANSIENT);
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}
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int time_extension_functions(const struct FuncDef **basic_funcs,
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const struct FuncDefAgg **agg_funcs)
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{
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static const struct FuncDef time_funcs[] = {
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{ "timeslice", 2, 0, SQLITE_UTF8, 0, timeslice },
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{ NULL }
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};
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*basic_funcs = time_funcs;
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*agg_funcs = NULL;
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return SQLITE_OK;
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}
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