FreeCalypso > hg > freecalypso-tools
view ringtools/imy/durations.c @ 965:2969032bdfac
fcup-smsend[mult]: fix buglet in K&R C NULL pointer passing
The only 100% safe way to pass a NULL pointer as a function argument
in K&R C is to cast 0 to a pointer type; failing to do so may cause
mysterious bugs (invalid stack frames or garbage in argument registers)
on 64-bit machines. This issue has already been fixed in most of
FC host tools, but I just found some missed spots: passing of NULL UDH
to PDU encoding functions in fcup-smsend[mult] in the case of single
(not concatenated) SMS.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Fri, 01 Sep 2023 07:33:51 +0000 |
parents | fd4c9bc7835d |
children |
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/* * This module implements the step of precomputing various note durations * in TDMA frames. */ extern unsigned beats_per_min; unsigned tdma_durations[6][4]; static float modifier_values[4] = {1.0f, 1.5f, 1.75f, 2.0f / 3.0f}; compute_note_durations() { float beat_ref, basic_ms[6], dur_ms; unsigned dur_tdma; int i, j; beat_ref = 60000.0f / beats_per_min; basic_ms[0] = beat_ref * 4.0f; basic_ms[1] = beat_ref * 2.0f; basic_ms[2] = beat_ref; basic_ms[3] = beat_ref / 2.0f; basic_ms[4] = beat_ref / 4.0f; basic_ms[5] = beat_ref / 8.0f; for (i = 0; i < 6; i++) { for (j = 0; j < 4; j++) { dur_ms = basic_ms[i] * modifier_values[j]; dur_tdma = dur_ms * 13.0f / 60.0f + 0.5f; tdma_durations[i][j] = dur_tdma; } } }