From: Aurelien Jacobs <redacted>
Date: Sun, 26 Apr 2015 22:42:05 +0000 (+0200)
Subject: Define our own constant for PI.
X-Git-Tag: libsigrok-0.4.0~518
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=76372c5a9ce25d94ee992a5c84b8135f0d945293;p=libsigrok.git

Define our own constant for PI.

M_PI is not defined in the C standard nor in POSIX, it is a
non-standard GNU extension.
---

diff --git a/src/hardware/demo/demo.c b/src/hardware/demo/demo.c
index 7111097b..44b92931 100644
--- a/src/hardware/demo/demo.c
+++ b/src/hardware/demo/demo.c
@@ -225,7 +225,7 @@ static void generate_analog_pattern(struct analog_gen *ag, uint64_t sample_rate)
 		for (i = 0; i < num_samples; i++) {
 			t = (double) i / (double) sample_rate;
 			ag->pattern_data[i] = ag->amplitude *
-						sin(2 * M_PI * frequency * t);
+						sin(2 * PI * frequency * t);
 		}
 
 		ag->num_samples = num_samples;
@@ -238,8 +238,8 @@ static void generate_analog_pattern(struct analog_gen *ag, uint64_t sample_rate)
 
 		for (i = 0; i < num_samples; i++) {
 			t = (double) i / (double) sample_rate;
-			ag->pattern_data[i] = (2 * ag->amplitude / M_PI) *
-						asin(sin(2 * M_PI * frequency * t));
+			ag->pattern_data[i] = (2 * ag->amplitude / PI) *
+						asin(sin(2 * PI * frequency * t));
 		}
 
 		ag->num_samples = num_samples;
diff --git a/src/hardware/saleae-logic16/protocol.c b/src/hardware/saleae-logic16/protocol.c
index 3db8a82f..1e900c15 100644
--- a/src/hardware/saleae-logic16/protocol.c
+++ b/src/hardware/saleae-logic16/protocol.c
@@ -307,7 +307,7 @@ static void make_heartbeat(uint8_t *table, int len)
 	len >>= 3;
 	for (i = 0; i < 2; i++)
 		for (j = 0; j < len; j++)
-			*table++ = sin(j * M_PI / len) * 255;
+			*table++ = sin(j * PI / len) * 255;
 }
 
 static int configure_led(const struct sr_dev_inst *sdi)
diff --git a/src/libsigrok-internal.h b/src/libsigrok-internal.h
index b4b32f23..9060e2a7 100644
--- a/src/libsigrok-internal.h
+++ b/src/libsigrok-internal.h
@@ -156,6 +156,8 @@
                          ((uint8_t*)(p))[2] = (uint8_t)((x)>>16); \
                          ((uint8_t*)(p))[3] = (uint8_t)((x)>>24); } while (0)
 
+#define PI 3.1415926535897932384626433832795
+
 /* Portability fixes for FreeBSD. */
 #ifdef __FreeBSD__
 #define LIBUSB_CLASS_APPLICATION 0xfe