Replace some magic numbers with a #define.

src/dmm/ut372.c

@@ -118,7 +118,7 @@ SR_PRIV int sr_ut372_parse(const uint8_t *buf, float *floatval,
 	divisor = 1;
 
 	for (i = 0; i < 5; i++) {
-		segments = decode_pair(buf + 1 + 2*i);
+		segments = decode_pair(buf + 1 + (2 * i));
 		for (j = 0; j < ARRAY_SIZE(lookup); j++) {
 			if (lookup[j] == (segments & ~DECIMAL_POINT_MASK)) {
 				value += j * pow(10, i);

src/hardware/center-3xx/protocol.c

@@ -20,8 +20,10 @@
 
 #include "protocol.h"
 
+#define NUM_CHANNELS 4
+
 struct center_info {
-	float temp[4];
+	float temp[NUM_CHANNELS];
 	gboolean rec, std, max, min, maxmin, t1t2, rel, hold, lowbat, celsius;
 	gboolean memfull, autooff;
 	gboolean mode_std, mode_rel, mode_max, mode_min, mode_maxmin;
@@ -84,21 +86,21 @@ static int packet_parse(const uint8_t *buf, int idx, struct center_info *info)
 	info->autooff     = (buf[2] & (1 << 7)) != 0;
 
 	/* Byte 7+8/9+10/11+12/13+14: channel T1/T2/T3/T4 temperature. */
-	for (i = 0; i < 4; i++) {
+	for (i = 0; i < NUM_CHANNELS; i++) {
 		temp_u16 = buf[8 + (i * 2)];
 		temp_u16 |= ((uint16_t)buf[7 + (i * 2)] << 8);
 		info->temp[i] = (float)temp_u16;
 	}
 
 	/* Byte 43: Specifies whether we need to divide the value(s) by 10. */
-	for (i = 0; i < 4; i++) {
+	for (i = 0; i < NUM_CHANNELS; i++) {
 		/* Bit = 0: Divide by 10. Bit = 1: Don't divide by 10. */
 		if ((buf[43] & (1 << i)) == 0)
 			info->temp[i] /= 10;
 	}
 
 	/* Bytes 39-42: Overflow/overlimit bits, depending on mode. */
-	for (i = 0; i < 4; i++) {
+	for (i = 0; i < NUM_CHANNELS; i++) {
 		if (info->mode_std && ((buf[39] & (1 << i)) != 0))
 			info->temp[i] = INFINITY;
 		/* TODO: Rel. Not available on all models. */
@@ -144,7 +146,7 @@ static int handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi, int idx)
 	analog.num_samples = 1;
 
 	/* Send the values for T1 - T4. */
-	for (i = 0; i < 4; i++) {
+	for (i = 0; i < NUM_CHANNELS; i++) {
 		l = NULL;
 		l = g_slist_append(l, g_slist_nth_data(sdi->channels, i));
 		analog.channels = l;

src/hardware/gmc-mh-1x-2x/api.c

@@ -301,13 +301,13 @@ static GSList *scan_2x_bd232(struct sr_dev_driver *di, GSList *options)
 	while (timeout_us > g_get_monotonic_time()) {
 		/* Receive reply (14 bytes) */
 		devc->buflen = 0;
-		for (cnt = 0; cnt < 14; cnt++) {
+		for (cnt = 0; cnt < GMC_REPLY_SIZE; cnt++) {
 			byte = read_byte(serial, timeout_us);
 			if (byte != -1)
 				devc->buf[devc->buflen++] = (byte & MASK_6BITS);
 		}
 
-		if (devc->buflen != 14)
+		if (devc->buflen != GMC_REPLY_SIZE)
 			continue;
 
 		devc->addr = devc->buf[0];

src/hardware/gmc-mh-1x-2x/protocol.c

@@ -900,7 +900,7 @@ static guchar calc_chksum_14(guchar* dta)
 {
 	guchar cnt, chs;
 
-	for (chs = 0, cnt = 0; cnt < 13; cnt++)
+	for (chs = 0, cnt = 0; cnt < (GMC_REPLY_SIZE - 1); cnt++)
 		chs += dta[cnt];
 
 	return (64 - chs) & MASK_6BITS;
@@ -1263,7 +1263,7 @@ SR_PRIV int gmc_mh_2x_receive_data(int fd, int revents, void *cb_data)
  */
 void create_cmd_14(guchar addr, guchar func, guchar* params, guchar* buf)
 {
-	uint8_t dta[14];	/* Unencoded message */
+	uint8_t dta[GMC_REPLY_SIZE];	/* Unencoded message */
 	int cnt;
 
 	if (!params || !buf)
@@ -1279,17 +1279,17 @@ void create_cmd_14(guchar addr, guchar func, guchar* params, guchar* buf)
 
 	/* 4-12: Copy further parameters */
 	for (cnt = 0; cnt < 9; cnt++)
-		dta[cnt+4] = (params[cnt] & MASK_6BITS);
+		dta[cnt + 4] = (params[cnt] & MASK_6BITS);
 
 	/* 13: Checksum (b complement) */
 	dta[13] = calc_chksum_14(dta);
 
 	/* The whole message is packed into 3 bytes per byte now (lower 6 bits only) the most
 	 * peculiar way I have ever seen. Possibly to improve IR communication? */
-	for (cnt = 0; cnt < 14; cnt++) {
+	for (cnt = 0; cnt < GMC_REPLY_SIZE; cnt++) {
-		buf[3*cnt] = (dta[cnt] & 0x01 ? 0x0f : 0) | (dta[cnt] & 0x02 ? 0xf0 : 0);
+		buf[(3 * cnt) + 0] = (dta[cnt] & 0x01 ? 0x0f : 0) | (dta[cnt] & 0x02 ? 0xf0 : 0);
-		buf[3*cnt + 1] = (dta[cnt] & 0x04 ? 0x0f : 0) | (dta[cnt] & 0x08 ? 0xf0 : 0);
+		buf[(3 * cnt) + 1] = (dta[cnt] & 0x04 ? 0x0f : 0) | (dta[cnt] & 0x08 ? 0xf0 : 0);
-		buf[3*cnt + 2] = (dta[cnt] & 0x10 ? 0x0f : 0) | (dta[cnt] & 0x20 ? 0xf0 : 0);
+		buf[(3 * cnt) + 2] = (dta[cnt] & 0x10 ? 0x0f : 0) | (dta[cnt] & 0x20 ? 0xf0 : 0);
 	}
 }
 

src/hardware/gmc-mh-1x-2x/protocol.h

@@ -32,7 +32,8 @@
 
 #define LOG_PREFIX "gmc-mh-1x-2x"
 
-#define GMC_BUFSIZE  266
+#define GMC_BUFSIZE 266
+#define GMC_REPLY_SIZE 14
 
 /** Message ID bits 4, 5 */
 #define MSGID_MASK  0x30 /**< Mask to get message ID bits */

src/hardware/hantek-dso/api.c

@@ -40,6 +40,8 @@
 #define NUM_TIMEBASE  10
 #define NUM_VDIV      8
 
+#define NUM_BUFFER_SIZES 2
+
 static const uint32_t scanopts[] = {
 	SR_CONF_CONN,
 };
@@ -543,13 +545,13 @@ static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sd
 			break;
 		case SR_CONF_BUFFERSIZE:
 			tmp_u64 = g_variant_get_uint64(data);
-			for (i = 0; i < 2; i++) {
+			for (i = 0; i < NUM_BUFFER_SIZES; i++) {
 				if (devc->profile->buffersizes[i] == tmp_u64) {
 					devc->framesize = tmp_u64;
 					break;
 				}
 			}
-			if (i == 2)
+			if (i == NUM_BUFFER_SIZES)
 				ret = SR_ERR_ARG;
 			break;
 		case SR_CONF_TIMEBASE:
@@ -658,7 +660,7 @@ static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *
 				return SR_ERR_ARG;
 			devc = sdi->priv;
 			*data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT64,
-					devc->profile->buffersizes, 2, sizeof(uint64_t));
+					devc->profile->buffersizes, NUM_BUFFER_SIZES, sizeof(uint64_t));
 			break;
 		case SR_CONF_TIMEBASE:
 			g_variant_builder_init(&gvb, G_VARIANT_TYPE_ARRAY);

src/hardware/hantek-dso/dso.c

@@ -26,6 +26,8 @@
 #include "libsigrok-internal.h"
 #include "dso.h"
 
+#define NUM_CHANNELS 2
+
 extern struct sr_dev_driver hantek_dso_driver_info;
 
 static int send_begin(const struct sr_dev_inst *sdi)
@@ -225,7 +227,7 @@ static int get_channel_offsets(const struct sr_dev_inst *sdi)
 	 * since that's how voltage offsets are submitted back to the DSO.
 	 * Convert to host order now, so we can use them natively.
 	 */
-	for (chan = 0; chan < 2; chan++) {
+	for (chan = 0; chan < NUM_CHANNELS; chan++) {
 		for (v = 0; v < 9; v++) {
 			devc->channel_levels[chan][v][0] =
 				g_ntohs(devc->channel_levels[chan][v][0]);
@@ -236,7 +238,7 @@ static int get_channel_offsets(const struct sr_dev_inst *sdi)
 
 	if (sr_log_loglevel_get() >= SR_LOG_DBG) {
 		gs = g_string_sized_new(128);
-		for (chan = 0; chan < 2; chan++) {
+		for (chan = 0; chan < NUM_CHANNELS; chan++) {
 			g_string_printf(gs, "CH%d:", chan + 1);
 			for (v = 0; v < 9; v++) {
 				g_string_append_printf(gs, " %.4x-%.4x",

src/hardware/norma-dmm/protocol.c

@@ -24,6 +24,8 @@
 
 #include "protocol.h"
 
+#define LINE_LENGTH 20
+
 SR_PRIV const struct nmadmm_req nmadmm_requests[] = {
 	{ NMADMM_REQ_IDN, "IDN?" },
 	{ NMADMM_REQ_IDN, "STATUS?" },
@@ -92,19 +94,19 @@ static void nma_process_line(const struct sr_dev_inst *sdi)
 
 	devc = sdi->priv;
 
-	devc->buf[20] = '\0';
+	devc->buf[LINE_LENGTH] = '\0';
 
 	sr_spew("Received line '%s'.", devc->buf);
 
 	/* Check line. */
-	if (strlen((const char *)devc->buf) != 20) {
+	if (strlen((const char *)devc->buf) != LINE_LENGTH) {
 		sr_err("line: Invalid status '%s', must be 20 hex digits.",
 		       devc->buf);
 		devc->buflen = 0;
 		return;
 	}
 
-	for (pos = 0; pos < 20; pos++) {
+	for (pos = 0; pos < LINE_LENGTH; pos++) {
 		if (!isxdigit(devc->buf[pos])) {
 			sr_err("line: Expected hex digit in '%s' at pos %d!",
 				devc->buf, pos);

src/hardware/openbench-logic-sniffer/api.c

@@ -100,7 +100,8 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	struct dev_context *devc;
 	struct sr_serial_dev_inst *serial;
 	GSList *l, *devices;
-	int ret, i;
+	int ret;
+	unsigned int i;
 	const char *conn, *serialcomm;
 	char buf[8];
 
@@ -191,7 +192,7 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 		sdi->model = g_strdup("Logic Analyzer");
 		sdi->version = g_strdup("v1.0");
 		sdi->driver = di;
-		for (i = 0; i < 32; i++)
+		for (i = 0; i < ARRAY_SIZE(ols_channel_names); i++)
 			sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE,
 					ols_channel_names[i]);
 		devc = ols_dev_new();

src/hardware/uni-t-ut32x/api.c

@@ -50,7 +50,7 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	struct sr_dev_inst *sdi;
 	struct sr_config *src;
 	GSList *usb_devices, *devices, *l;
-	int i;
+	unsigned int i;
 	const char *conn;
 
 	drvc = di->priv;
@@ -80,7 +80,7 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 			sdi->driver = di;
 			sdi->inst_type = SR_INST_USB;
 			sdi->conn = l->data;
-			for (i = 0; i < 3; i++)
+			for (i = 0; i < ARRAY_SIZE(channel_names); i++)
 				sr_channel_new(sdi, i, SR_CHANNEL_ANALOG, TRUE,
 						channel_names[i]);
 			devc = g_malloc0(sizeof(struct dev_context));