2 * This file is part of the sigrok project.
4 * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
27 * Convert a numeric samplerate value to its "natural" string representation.
29 * E.g. a value of 3000000 would be converted to "3 MHz", 20000 to "20 kHz".
31 * @param samplerate The samplerate in Hz.
32 * @return A malloc()ed string representation of the samplerate value,
33 * or NULL upon errors. The caller is responsible to free() the memory.
35 char *sigrok_samplerate_string(uint64_t samplerate)
40 o = malloc(30 + 1); /* Enough for a uint64_t as string + " GHz". */
44 if (samplerate >= GHZ(1))
45 r = snprintf(o, 30, "%" PRIu64 " GHz", samplerate / 1000000000);
46 else if (samplerate >= MHZ(1))
47 r = snprintf(o, 30, "%" PRIu64 " MHz", samplerate / 1000000);
48 else if (samplerate >= KHZ(1))
49 r = snprintf(o, 30, "%" PRIu64 " kHz", samplerate / 1000);
51 r = snprintf(o, 30, "%" PRIu64 " Hz", samplerate);
54 /* Something went wrong... */
63 * Convert a numeric samplerate value to the "natural" string representation
66 * E.g. a value of 3000000 would be converted to "3 us", 20000 to "50 ms".
68 * @param frequency The frequency in Hz.
69 * @return A malloc()ed string representation of the frequency value,
70 * or NULL upon errors. The caller is responsible to free() the memory.
72 char *sigrok_period_string(uint64_t frequency)
77 o = malloc(30 + 1); /* Enough for a uint64_t as string + " ms". */
81 if (frequency >= GHZ(1))
82 r = snprintf(o, 30, "%" PRIu64 " ns", frequency / 1000000000);
83 else if (frequency >= MHZ(1))
84 r = snprintf(o, 30, "%" PRIu64 " us", frequency / 1000000);
85 else if (frequency >= KHZ(1))
86 r = snprintf(o, 30, "%" PRIu64 " ms", frequency / 1000);
88 r = snprintf(o, 30, "%" PRIu64 " s", frequency);
91 /* Something went wrong... */