264 lines
6.5 KiB
C
264 lines
6.5 KiB
C
/*
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* This file is part of the sigrok project.
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*
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* Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sigrok.h>
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/**
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* Convert a numeric samplerate value to its "natural" string representation.
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*
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* E.g. a value of 3000000 would be converted to "3 MHz", 20000 to "20 kHz".
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*
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* @param samplerate The samplerate in Hz.
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* @return A malloc()ed string representation of the samplerate value,
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* or NULL upon errors. The caller is responsible to free() the memory.
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*/
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char *sr_samplerate_string(uint64_t samplerate)
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{
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char *o;
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int r;
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o = malloc(30 + 1); /* Enough for a uint64_t as string + " GHz". */
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if (!o)
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return NULL;
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if (samplerate >= GHZ(1))
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r = snprintf(o, 30, "%" PRIu64 " GHz", samplerate / 1000000000);
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else if (samplerate >= MHZ(1))
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r = snprintf(o, 30, "%" PRIu64 " MHz", samplerate / 1000000);
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else if (samplerate >= KHZ(1))
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r = snprintf(o, 30, "%" PRIu64 " kHz", samplerate / 1000);
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else
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r = snprintf(o, 30, "%" PRIu64 " Hz", samplerate);
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if (r < 0) {
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/* Something went wrong... */
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free(o);
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return NULL;
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}
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return o;
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}
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/**
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* Convert a numeric frequency value to the "natural" string representation
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* of its period.
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*
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* E.g. a value of 3000000 would be converted to "3 us", 20000 to "50 ms".
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*
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* @param frequency The frequency in Hz.
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* @return A malloc()ed string representation of the frequency value,
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* or NULL upon errors. The caller is responsible to free() the memory.
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*/
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char *sr_period_string(uint64_t frequency)
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{
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char *o;
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int r;
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o = malloc(30 + 1); /* Enough for a uint64_t as string + " ms". */
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if (!o)
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return NULL;
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if (frequency >= GHZ(1))
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r = snprintf(o, 30, "%" PRIu64 " ns", frequency / 1000000000);
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else if (frequency >= MHZ(1))
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r = snprintf(o, 30, "%" PRIu64 " us", frequency / 1000000);
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else if (frequency >= KHZ(1))
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r = snprintf(o, 30, "%" PRIu64 " ms", frequency / 1000);
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else
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r = snprintf(o, 30, "%" PRIu64 " s", frequency);
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if (r < 0) {
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/* Something went wrong... */
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free(o);
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return NULL;
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}
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return o;
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}
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/**
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* TODO
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*
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* @param device TODO
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* @param triggerstring TODO
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* @return TODO
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*/
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char **sr_parse_triggerstring(struct sr_device *device,
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const char *triggerstring)
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{
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GSList *l;
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struct sr_probe *probe;
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int max_probes, probenum, i;
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char **tokens, **triggerlist, *trigger, *tc, *trigger_types;
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gboolean error;
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max_probes = g_slist_length(device->probes);
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error = FALSE;
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triggerlist = g_malloc0(max_probes * sizeof(char *));
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tokens = g_strsplit(triggerstring, ",", max_probes);
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trigger_types = device->plugin->get_device_info(0, SR_DI_TRIGGER_TYPES);
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if (trigger_types == NULL)
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return NULL;
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for (i = 0; tokens[i]; i++) {
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if (tokens[i][0] < '0' || tokens[i][0] > '9') {
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/* Named probe */
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probenum = 0;
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for (l = device->probes; l; l = l->next) {
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probe = (struct sr_probe *)l->data;
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if (probe->enabled
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&& !strncmp(probe->name, tokens[i],
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strlen(probe->name))) {
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probenum = probe->index;
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break;
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}
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}
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} else {
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probenum = strtol(tokens[i], NULL, 10);
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}
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if (probenum < 1 || probenum > max_probes) {
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printf("Invalid probe.\n");
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error = TRUE;
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break;
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}
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if ((trigger = strchr(tokens[i], '='))) {
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for (tc = ++trigger; *tc; tc++) {
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if (strchr(trigger_types, *tc) == NULL) {
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printf("Unsupported trigger type "
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"'%c'\n", *tc);
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error = TRUE;
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break;
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}
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}
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if (!error)
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triggerlist[probenum - 1] = g_strdup(trigger);
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}
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}
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g_strfreev(tokens);
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if (error) {
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for (i = 0; i < max_probes; i++)
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if (triggerlist[i])
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g_free(triggerlist[i]);
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g_free(triggerlist);
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triggerlist = NULL;
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}
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return triggerlist;
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}
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/**
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* Convert a "natural" string representation of a size value to uint64_t.
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*
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* E.g. a value of "3k" or "3 K" would be converted to 3000, a value
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* of "15M" would be converted to 15000000.
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*
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* Value representations other than decimal (such as hex or octal) are not
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* supported. Only 'k' (kilo), 'm' (mega), 'g' (giga) suffixes are supported.
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* Spaces (but not other whitespace) between value and suffix are allowed.
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*
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* @param sizestring A string containing a (decimal) size value.
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* @return The string's size value as uint64_t.
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*
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* TODO: Error handling.
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*/
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uint64_t sr_parse_sizestring(const char *sizestring)
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{
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int multiplier;
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uint64_t val;
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char *s;
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val = strtoull(sizestring, &s, 10);
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multiplier = 0;
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while (s && *s && multiplier == 0) {
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switch (*s) {
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case ' ':
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break;
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case 'k':
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case 'K':
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multiplier = KHZ(1);
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break;
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case 'm':
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case 'M':
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multiplier = MHZ(1);
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break;
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case 'g':
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case 'G':
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multiplier = GHZ(1);
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break;
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default:
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val = 0;
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multiplier = -1;
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}
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s++;
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}
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if (multiplier > 0)
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val *= multiplier;
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return val;
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}
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/**
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* Convert a "natural" string representation of a time value to an
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* uint64_t value in milliseconds.
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*
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* E.g. a value of "3s" or "3 s" would be converted to 3000, a value
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* of "15ms" would be converted to 15.
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*
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* Value representations other than decimal (such as hex or octal) are not
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* supported. Only lower-case "s" and "ms" time suffixes are supported.
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* Spaces (but not other whitespace) between value and suffix are allowed.
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*
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* @param timestring A string containing a (decimal) time value.
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* @return The string's time value as uint64_t, in milliseconds.
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*
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* TODO: Error handling.
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* TODO: Add support for "m" (minutes) and others.
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* TODO: picoseconds?
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* TODO: Allow both lower-case and upper-case.
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*/
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uint64_t sr_parse_timestring(const char *timestring)
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{
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uint64_t time_msec;
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char *s;
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time_msec = strtoull(timestring, &s, 10);
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if (time_msec == 0 && s == timestring)
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return 0;
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if (s && *s) {
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while (*s == ' ')
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s++;
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if (!strcmp(s, "s"))
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time_msec *= 1000;
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else if (!strcmp(s, "ms"))
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; /* redundant */
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else
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return 0;
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}
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return time_msec;
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}
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