411 lines
11 KiB
C
411 lines
11 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 "libsigrok.h"
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#include "libsigrok-internal.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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* 31500 would become "31.5 kHz".
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*
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* @param samplerate The samplerate in Hz.
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*
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* @return A g_try_malloc()ed string representation of the samplerate value,
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* or NULL upon errors. The caller is responsible to g_free() the
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* memory.
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*/
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SR_API char *sr_samplerate_string(uint64_t samplerate)
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{
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char *o;
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uint64_t s = samplerate;
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if ((s >= SR_GHZ(1)) && (s % SR_GHZ(1) == 0)) {
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o = g_strdup_printf("%" PRIu64 " GHz", s / SR_GHZ(1));
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} else if ((s >= SR_GHZ(1)) && (s % SR_GHZ(1) != 0)) {
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o = g_strdup_printf("%" PRIu64 ".%" PRIu64 " GHz",
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s / SR_GHZ(1), s % SR_GHZ(1));
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} else if ((s >= SR_MHZ(1)) && (s % SR_MHZ(1) == 0)) {
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o = g_strdup_printf("%" PRIu64 " MHz", s / SR_MHZ(1));
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} else if ((s >= SR_MHZ(1)) && (s % SR_MHZ(1) != 0)) {
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o = g_strdup_printf("%" PRIu64 ".%" PRIu64 " MHz",
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s / SR_MHZ(1), s % SR_MHZ(1));
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} else if ((s >= SR_KHZ(1)) && (s % SR_KHZ(1) == 0)) {
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o = g_strdup_printf("%" PRIu64 " kHz", s / SR_KHZ(1));
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} else if ((s >= SR_KHZ(1)) && (s % SR_KHZ(1) != 0)) {
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o = g_strdup_printf("%" PRIu64 ".%" PRIu64 " kHz",
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s / SR_KHZ(1), s % SR_KHZ(1));
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} else {
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o = g_strdup_printf("%" PRIu64 " Hz", s);
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}
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if (!o) {
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sr_err("strutil: %s: Error creating samplerate string.",
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__func__);
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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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*
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* @return A g_try_malloc()ed string representation of the frequency value,
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* or NULL upon errors. The caller is responsible to g_free() the
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* memory.
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*/
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SR_API 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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/* Allocate enough for a uint64_t as string + " ms". */
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if (!(o = g_try_malloc0(30 + 1))) {
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sr_err("strutil: %s: o malloc failed", __func__);
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return NULL;
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}
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if (frequency >= SR_GHZ(1))
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r = snprintf(o, 30, "%" PRIu64 " ns", frequency / 1000000000);
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else if (frequency >= SR_MHZ(1))
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r = snprintf(o, 30, "%" PRIu64 " us", frequency / 1000000);
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else if (frequency >= SR_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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g_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 voltage value.
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*
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* E.g. a value of 300000 would be converted to "300mV", 2 to "2V".
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*
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* @param voltage The voltage represented as a rational number, with the
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* denominator a divisor of 1V.
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*
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* @return A g_try_malloc()ed string representation of the voltage value,
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* or NULL upon errors. The caller is responsible to g_free() the
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* memory.
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*/
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SR_API char *sr_voltage_string(struct sr_rational *voltage)
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{
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char *o;
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int r;
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if (!(o = g_try_malloc0(30 + 1))) {
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sr_err("strutil: %s: o malloc failed", __func__);
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return NULL;
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}
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if (voltage->q == 1000)
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r = snprintf(o, 30, "%" PRIu64 "mV", voltage->p);
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else if (voltage->q == 1)
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r = snprintf(o, 30, "%" PRIu64 "V", voltage->p);
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else
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r = -1;
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if (r < 0) {
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/* Something went wrong... */
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g_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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* Parse a trigger specification string.
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*
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* @param dev The device for which the trigger specification is intended.
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* @param triggerstring The string containing the trigger specification for
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* one or more probes of this device. Entries for multiple probes are
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* comma-separated. Triggers are specified in the form key=value,
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* where the key is a probe number (or probe name) and the value is
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* the requested trigger type. Valid trigger types currently
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* include 'r' (rising edge), 'f' (falling edge), 'c' (any pin value
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* change), '0' (low value), or '1' (high value).
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* Example: "1=r,sck=f,miso=0,7=c"
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*
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* @return Pointer to a list of trigger types (strings), or NULL upon errors.
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* The pointer list (if non-NULL) has as many entries as the
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* respective device has probes (all physically available probes,
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* not just enabled ones). Entries of the list which don't have
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* a trigger value set in 'triggerstring' are NULL, the other entries
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* contain the respective trigger type which is requested for the
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* respective probe (e.g. "r", "c", and so on).
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*/
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SR_API char **sr_parse_triggerstring(const struct sr_dev_inst *sdi,
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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;
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const char *trigger_types;
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gboolean error;
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max_probes = g_slist_length(sdi->probes);
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error = FALSE;
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if (!(triggerlist = g_try_malloc0(max_probes * sizeof(char *)))) {
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sr_err("strutil: %s: triggerlist malloc failed", __func__);
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return NULL;
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}
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tokens = g_strsplit(triggerstring, ",", max_probes);
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if (sdi->driver->info_get(SR_DI_TRIGGER_TYPES,
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(const void **)&trigger_types, sdi) != SR_OK) {
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sr_err("strutil: %s: Device doesn't support any triggers.", __func__);
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return NULL;
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}
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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 = sdi->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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sr_err("strutil: Invalid probe (%d).", probenum);
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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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sr_err("strutil: Unsupported trigger "
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"type '%c'.", *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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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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* @param size Pointer to uint64_t which will contain the string's size value.
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*
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* @return SR_OK upon success, SR_ERR upon errors.
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*/
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SR_API int sr_parse_sizestring(const char *sizestring, uint64_t *size)
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{
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int multiplier, done;
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char *s;
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*size = strtoull(sizestring, &s, 10);
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multiplier = 0;
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done = FALSE;
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while (s && *s && multiplier == 0 && !done) {
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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 = SR_KHZ(1);
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break;
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case 'm':
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case 'M':
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multiplier = SR_MHZ(1);
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break;
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case 'g':
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case 'G':
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multiplier = SR_GHZ(1);
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break;
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default:
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done = TRUE;
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s--;
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}
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s++;
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}
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if (multiplier > 0)
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*size *= multiplier;
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if (*s && strcasecmp(s, "Hz"))
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return SR_ERR;
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return SR_OK;
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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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SR_API 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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SR_API gboolean sr_parse_boolstring(const char *boolstr)
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{
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if (!boolstr)
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return FALSE;
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if (!g_ascii_strncasecmp(boolstr, "true", 4) ||
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!g_ascii_strncasecmp(boolstr, "yes", 3) ||
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!g_ascii_strncasecmp(boolstr, "on", 2) ||
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!g_ascii_strncasecmp(boolstr, "1", 1))
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return TRUE;
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return FALSE;
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}
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SR_API int sr_parse_period(const char *periodstr, struct sr_rational *r)
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{
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char *s;
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r->p = strtoull(periodstr, &s, 10);
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if (r->p == 0 && s == periodstr)
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/* No digits found. */
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return SR_ERR_ARG;
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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, "ns"))
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r->q = 1000000000L;
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else if (!strcmp(s, "us"))
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r->q = 1000000;
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else if (!strcmp(s, "ms"))
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r->q = 1000;
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else if (!strcmp(s, "s"))
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r->q = 1;
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else
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/* Must have a time suffix. */
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return SR_ERR_ARG;
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}
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return SR_OK;
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}
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SR_API int sr_parse_voltage(const char *voltstr, struct sr_rational *r)
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{
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char *s;
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r->p = strtoull(voltstr, &s, 10);
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if (r->p == 0 && s == voltstr)
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/* No digits found. */
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return SR_ERR_ARG;
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if (s && *s) {
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while (*s == ' ')
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s++;
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if (!strcasecmp(s, "mv"))
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r->q = 1000L;
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else if (!strcasecmp(s, "v"))
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r->q = 1;
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else
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/* Must have a base suffix. */
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return SR_ERR_ARG;
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}
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return SR_OK;
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}
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