lib: Remove num_stripes from fpi_assemble_frames()

We never used a number of stripes that didn't match the length of the
list anyway.

Closes: #132

HACKING.md

@@ -3,8 +3,29 @@
 ## GLib
 
 Although the library uses GLib internally, libfprint is designed to provide
-a completely neutral interface to it's application users. So, the public
-APIs should never return GLib data types or anything like that.
+a completely neutral interface to its application users. So, the public
+APIs should never return GLib data types.
+
+## License clarification
+
+Although this library's license could allow for shims that hook up into
+proprietary blobs to add driver support for some unsupported devices, the
+intent of the original authors, and of current maintainers of the library,
+was for this license to allow _integration into_ proprietary stacks, not
+_integration of_ proprietary code in the library.
+
+As such, no code to integrate proprietary drivers will be accepted in libfprint
+upstream. Proprietary drivers would make it impossible to debug problems in
+libfprint, as we wouldn't know what the proprietary driver does behind the
+library's back. The closed source nature of drivers is usually used to hide
+parts of the hardware setup, such as encryption keys, or protocols, in order
+to protect the hardware's integrity. Unfortunately, this is only [security through
+obscurity](https://en.wikipedia.org/wiki/Security_through_obscurity).
+
+We however encourage potential contributors to take advantage of libfprint's
+source availability to create such shims to make it easier to reverse-engineer
+proprietary drivers in order to create new free software drivers, to the extent
+permitted by local laws.
 
 ## Two-faced-ness
 

code-of-conduct.md

@@ -0,0 +1,3 @@
+This project and its community follow the [Freedesktop.org code of conduct]
+
+[Freedesktop.org code of conduct]: https://www.freedesktop.org/wiki/CodeOfConduct/

libfprint/drivers/aes1610.c

@@ -404,7 +404,7 @@ static unsigned char list_BD_values[10] = {
 /*
  * Adjust the gain according to the histogram data
  * 0xbd, 0xbe, 0x29 and 0x2A registers are affected
- * Returns 0 if no problem occured
+ * Returns 0 if no problem occurred
  * TODO: This is a basic support for gain. It needs testing/tweaking.  */
 static int adjust_gain(unsigned char *buffer, int status)
 {
@@ -412,7 +412,7 @@ static int adjust_gain(unsigned char *buffer, int status)
 	static int pos_list_BE = 0;
 	static int pos_list_BD = 0;
 
-	// This is the first adjustement (we begin acquisition)
+	// This is the first adjustment (we begin acquisition)
 	// We adjust strip_scan_reqs for future strips and capture_reqs that is sent just after this step
 	if (status == GAIN_STATUS_FIRST) {
 		if (buffer[1] > 0x78) { // maximum gain needed
@@ -534,7 +534,7 @@ static void restore_gain(void)
 
 /* capture SM movement:
  * request and read strip,
- * jump back to request UNLESS theres no finger, in which case exit SM,
+ * jump back to request UNLESS there's no finger, in which case exit SM,
  * report lack of finger presence, and move to finger detection */
 
 enum capture_states {
@@ -611,8 +611,8 @@ static void capture_read_strip_cb(struct libusb_transfer *transfer)
 		/* send stop capture bits */
 		aes_write_regv(dev, capture_stop, G_N_ELEMENTS(capture_stop), stub_capture_stop_cb, NULL);
 		aesdev->strips = g_slist_reverse(aesdev->strips);
-		fpi_do_movement_estimation(&assembling_ctx, aesdev->strips, aesdev->strips_len);
-		img = fpi_assemble_frames(&assembling_ctx, aesdev->strips, aesdev->strips_len);
+		fpi_do_movement_estimation(&assembling_ctx, aesdev->strips);
+		img = fpi_assemble_frames(&assembling_ctx, aesdev->strips);
 		img->flags |= FP_IMG_PARTIAL;
 		g_slist_free_full(aesdev->strips, g_free);
 		aesdev->strips = NULL;
@@ -728,7 +728,7 @@ static void activate_run_state(fpi_ssm *ssm, struct fp_dev *_dev, void *user_dat
 	struct fp_img_dev *dev = user_data;
 
 	/* activation on aes1610 seems much more straightforward compared to aes2501 */
-	/* verify theres anything missing here */
+	/* verify there's anything missing here */
 	switch (fpi_ssm_get_cur_state(ssm)) {
 	case WRITE_INIT:
 		fp_dbg("write init");

libfprint/drivers/aes2501.c

@@ -415,7 +415,7 @@ static struct aes_regwrite strip_scan_reqs[] = {
 /* capture SM movement:
  * write reqs and read data 1 + 2,
  * request and read strip,
- * jump back to request UNLESS theres no finger, in which case exit SM,
+ * jump back to request UNLESS there's no finger, in which case exit SM,
  * report lack of finger presence, and move to finger detection */
 
 enum capture_states {
@@ -482,10 +482,8 @@ static void capture_read_strip_cb(struct libusb_transfer *transfer,
 			struct fp_img *img;
 
 			aesdev->strips = g_slist_reverse(aesdev->strips);
-			fpi_do_movement_estimation(&assembling_ctx,
-					aesdev->strips, aesdev->strips_len);
-			img = fpi_assemble_frames(&assembling_ctx,
-						  aesdev->strips, aesdev->strips_len);
+			fpi_do_movement_estimation(&assembling_ctx, aesdev->strips);
+			img = fpi_assemble_frames(&assembling_ctx, aesdev->strips);
 			img->flags |= FP_IMG_PARTIAL;
 			g_slist_free_full(aesdev->strips, g_free);
 			aesdev->strips = NULL;

libfprint/drivers/aes2501.h

@@ -109,7 +109,7 @@ enum aes2501_mesure_drive {
 
 /* Select (1=square | 0=sine) wave drive during measure */
 #define AES2501_MEASDRV_SQUARE		0x20
-/* 0 = use mesure drive setting, 1 = when sine wave is selected */
+/* 0 = use measure drive setting, 1 = when sine wave is selected */
 #define AES2501_MEASDRV_MEASURE_SQUARE	0x10
 
 enum aes2501_measure_freq {

libfprint/drivers/aes2550.c

@@ -244,8 +244,7 @@ static void capture_set_idle_reqs_cb(struct libusb_transfer *transfer)
 		struct fp_img *img;
 
 		aesdev->strips = g_slist_reverse(aesdev->strips);
-		img = fpi_assemble_frames(&assembling_ctx,
-					  aesdev->strips, aesdev->strips_len);
+		img = fpi_assemble_frames(&assembling_ctx, aesdev->strips);
 		img->flags |= FP_IMG_PARTIAL;
 		g_slist_free_full(aesdev->strips, g_free);
 		aesdev->strips = NULL;
@@ -447,7 +446,7 @@ static void init_read_data_cb(struct libusb_transfer *transfer)
 }
 
 /* TODO: use calibration table, datasheet is rather terse on that
- * need more info for implementaion */
+ * need more info for implementation */
 static void calibrate_read_data_cb(struct libusb_transfer *transfer)
 {
 	fpi_ssm *ssm = transfer->user_data;

libfprint/drivers/aesx660.c

@@ -305,7 +305,7 @@ static void capture_set_idle_cmd_cb(struct libusb_transfer *transfer)
 		struct fp_img *img;
 
 		aesdev->strips = g_slist_reverse(aesdev->strips);
-		img = fpi_assemble_frames(aesdev->assembling_ctx, aesdev->strips, aesdev->strips_len);
+		img = fpi_assemble_frames(aesdev->assembling_ctx, aesdev->strips);
 		img->flags |= aesdev->extra_img_flags;
 		g_slist_foreach(aesdev->strips, (GFunc) g_free, NULL);
 		g_slist_free(aesdev->strips);

libfprint/drivers/elan.c

@@ -293,23 +293,22 @@ static void elan_process_frame_thirds(unsigned short *raw_frame,
 static void elan_submit_image(struct fp_img_dev *dev)
 {
 	struct elan_dev *elandev = FP_INSTANCE_DATA(FP_DEV(dev));
+	int num_frames;
+	GSList *raw_frames;
 	GSList *frames = NULL;
 	struct fp_img *img;
 
 	G_DEBUG_HERE();
 
-	for (int i = 0; i < ELAN_SKIP_LAST_FRAMES; i++)
-		elandev->frames = g_slist_next(elandev->frames);
-	elandev->num_frames -= ELAN_SKIP_LAST_FRAMES;
+	num_frames = elandev->num_frames - ELAN_SKIP_LAST_FRAMES;
+	raw_frames = g_slist_nth(elandev->frames, ELAN_SKIP_LAST_FRAMES);
 
 	assembling_ctx.frame_width = elandev->frame_width;
 	assembling_ctx.frame_height = elandev->frame_height;
 	assembling_ctx.image_width = elandev->frame_width * 3 / 2;
-	g_slist_foreach(elandev->frames, (GFunc) elandev->process_frame,
-			&frames);
-	fpi_do_movement_estimation(&assembling_ctx, frames,
-				   elandev->num_frames);
-	img = fpi_assemble_frames(&assembling_ctx, frames, elandev->num_frames);
+	g_slist_foreach(raw_frames, (GFunc) elandev->process_frame, &frames);
+	fpi_do_movement_estimation(&assembling_ctx, frames);
+	img = fpi_assemble_frames(&assembling_ctx, frames);
 
 	img->flags |= FP_IMG_PARTIAL;
 	fpi_imgdev_image_captured(dev, img);

libfprint/drivers/etes603.c

@@ -1316,7 +1316,7 @@ static void m_init_state(fpi_ssm *ssm, struct fp_dev *_dev, void *user_data)
 		fpi_ssm_next_state(ssm);
 		break;
 	case INIT_SENSOR_REQ:
-		/* In captured traffic, those are splitted. */
+		/* In captured traffic, those are split. */
 		msg_set_regs(dev, 18, REG_MODE_CONTROL, REG_MODE_SLEEP,
 			REG_50, 0x0F, REG_GAIN, 0x04, REG_VRT, 0x08,
 			REG_VRB, 0x0D, REG_VCO_CONTROL, REG_VCO_RT,

libfprint/drivers/upeksonly.c

@@ -136,7 +136,7 @@ static unsigned char upeksonly_get_pixel(struct fpi_line_asmbl_ctx *ctx,
 	unsigned char *buf;
 	unsigned offset;
 
-	/* The scans from this device are rolled right by two colums */
+	/* The scans from this device are rolled right by two columns */
 	if (x < ctx->line_width - 2)
 		offset = x + 2;
 	else if ((x > ctx->line_width - 2) && (x < ctx->line_width))
@@ -296,12 +296,12 @@ static void row_complete(struct fp_img_dev *dev)
 			sdev->num_blank = 0;
 		} else {
 			sdev->num_blank++;
-			/* Don't consider the scan complete unless theres at least
+			/* Don't consider the scan complete unless there's at least
 			 * MIN_ROWS recorded or very long blank read occurred.
 			 *
 			 * Typical problem spot: one brief touch before starting the
 			 * actual scan. Happens most commonly if scan is started
-			 * from before the first joint resulting in a gap after the inital touch.
+			 * from before the first joint resulting in a gap after the initial touch.
 			 */
 			if (sdev->num_blank > FINGER_REMOVED_THRESHOLD) {
 				sdev->finger_state = FINGER_REMOVED;

libfprint/drivers/upektc_img.c

@@ -287,7 +287,7 @@ static void capture_read_data_cb(struct libusb_transfer *transfer)
 				fpi_ssm_mark_completed(ssm);
 				break;
 			default:
-				fp_err("Uknown response!\n");
+				fp_err("Unknown response!\n");
 				fpi_ssm_mark_failed(ssm, -EIO);
 				break;
 		}

libfprint/drivers/uru4000.c

@@ -668,7 +668,7 @@ static uint32_t do_decode(uint8_t *data, int num_bytes, uint32_t key)
 		data[i] = data[i+1] ^ xorbyte;
 	}
 
-	/* the final byte is implictly zero */
+	/* the final byte is implicitly zero */
 	data[i] = 0;
 	return update_key(key);
 }

libfprint/drivers/vfs0050.c

@@ -577,7 +577,7 @@ static void activate_ssm(fpi_ssm *ssm, struct fp_dev *_dev, void *user_data)
 			vdev->need_report = 0;
 		}
 
-		/* Asyncronously enquire an interrupt */
+		/* Asynchronously enquire an interrupt */
 		vdev->transfer = fpi_usb_alloc();
 		vdev->transfer->flags |= LIBUSB_TRANSFER_FREE_TRANSFER;
 		libusb_fill_interrupt_transfer(vdev->transfer, usb_dev, 0x83,

libfprint/drivers/vfs101.c

@@ -47,7 +47,7 @@
 /* Minimum image height */
 #define VFS_IMG_MIN_HEIGHT	200
 
-/* Scan level thresold */
+/* Scan level threshold */
 #define VFS_IMG_SLT_BEGIN		768
 #define VFS_IMG_SLT_END			64
 #define VFS_IMG_SLT_LINES		4
@@ -641,7 +641,7 @@ static int action_completed(struct fp_img_dev *dev)
 
 #define offset(x, y)	((x) + ((y) * VFS_FRAME_SIZE))
 
-/* Screen image to remove noise and find bottom line and height od image */
+/* Screen image to remove noise and find bottom line and height of image */
 static void img_screen(struct vfs101_dev *vdev)
 {
 	int y, x, count, top;
@@ -654,7 +654,7 @@ static void img_screen(struct vfs101_dev *vdev)
 
 	/* Image returned from sensor can contain many empty lines,
 	 * for remove these lines compare byte 282-283 (scan level information)
-	 * with two differents threshold, one for the begin of finger image and
+	 * with two different thresholds, one for the begin of finger image and
 	 * one for the end. To increase stability of the code use a counter
 	 * of lines that satisfy the threshold.
 	 */
@@ -700,7 +700,7 @@ static void img_screen(struct vfs101_dev *vdev)
 
 	vdev->height = top - vdev->bottom + 1;
 
-	/* Checkk max height */
+	/* Check max height */
 	if (vdev->height > VFS_IMG_MAX_HEIGHT)
 		vdev->height = VFS_IMG_MAX_HEIGHT;
 
@@ -1178,7 +1178,7 @@ static void m_init_state(fpi_ssm *ssm, struct fp_dev *_dev, void *user_data)
 	switch (fpi_ssm_get_cur_state(ssm))
 	{
 	case M_INIT_0_RECV_DIRTY:
-		/* Recv eventualy dirty data */
+		/* Recv eventually dirty data */
 		vdev->ignore_error = TRUE;
 		async_recv(ssm, dev);
 		break;
@@ -1463,7 +1463,7 @@ static void dev_deactivate(struct fp_img_dev *dev)
 	/* Reset active state */
 	vdev->active = FALSE;
 
-	/* Handle eventualy existing events */
+	/* Handle eventually existing events */
 	while (vdev->transfer)
 		fp_handle_events();
 

libfprint/drivers/vfs301_proto.h

@@ -109,7 +109,7 @@ typedef struct {
 
 	unsigned char scan[VFS301_FP_WIDTH];
 
-	/* A offseted, stretched, inverted copy of scan... probably could
+	/* A offsetted, stretched, inverted copy of scan... probably could
 	 * serve finger motion speed detection?
 	 * Seems to be subdivided to some 10B + 53B + 1B blocks */
 	unsigned char mirror[64];

libfprint/drivers/vfs301_proto_fragments.h

@@ -1147,7 +1147,7 @@ static const unsigned char vfs301_24[] = { /* 119 B */
  *
  * The contents of PACKET() inside this blob seems to be some kind
  * of a micro-program, which specifies which columns contain what. LE seems
- * to be used also here. Not neccessarily is 1 output column described
+ * to be used also here. Not necessarily is 1 output column described
  * by 1 operation. For example the vfs301_line_t::sum section seems
  * to perform 2 operations for each column - probably some kind of diff between
  * input lines?

libfprint/drivers/vfs5011.c

@@ -405,7 +405,7 @@ submit_image(fpi_ssm             *ssm,
 	g_slist_free_full(data->rows, g_free);
 	data->rows = NULL;
 
-	fp_dbg("Image captured, commiting");
+	fp_dbg("Image captured, committing");
 
 	fpi_imgdev_image_captured(dev, img);
 }

libfprint/fpi-assembling.c

@@ -121,13 +121,12 @@ static void find_overlap(struct fpi_frame_asmbl_ctx *ctx,
 }
 
 static unsigned int do_movement_estimation(struct fpi_frame_asmbl_ctx *ctx,
-			    GSList *stripes, size_t num_stripes,
-			    gboolean reverse)
+			    GSList *stripes, gboolean reverse)
 {
-	GSList *list_entry = stripes;
+	GSList *l;
 	GTimer *timer;
-	int frame = 1;
-	struct fpi_frame *prev_stripe = list_entry->data;
+	guint num_frames = 0;
+	struct fpi_frame *prev_stripe;
 	unsigned int min_error;
 	/* Max error is width * height * 255, for AES2501 which has the largest
 	 * sensor its 192*16*255 = 783360. So for 32bit value it's ~5482 frame before
@@ -135,39 +134,34 @@ static unsigned int do_movement_estimation(struct fpi_frame_asmbl_ctx *ctx,
 	 */
 	unsigned long long total_error = 0;
 
-	list_entry = g_slist_next(list_entry);
-
 	timer = g_timer_new();
-	do {
-		struct fpi_frame *cur_stripe = list_entry->data;
+	prev_stripe = stripes->data;
+	for (l = stripes; l != NULL; l = l->next, num_frames++) {
+		struct fpi_frame *cur_stripe = l->data;
 
 		if (reverse) {
 			find_overlap(ctx, prev_stripe, cur_stripe, &min_error);
 			cur_stripe->delta_y = -cur_stripe->delta_y;
 			cur_stripe->delta_x = -cur_stripe->delta_x;
-		}
-		else
+		} else {
 			find_overlap(ctx, cur_stripe, prev_stripe, &min_error);
+		}
 		total_error += min_error;
 
-		frame++;
 		prev_stripe = cur_stripe;
-		list_entry = g_slist_next(list_entry);
-
-	} while (frame < num_stripes);
+	}
 
 	g_timer_stop(timer);
 	fp_dbg("calc delta completed in %f secs", g_timer_elapsed(timer, NULL));
 	g_timer_destroy(timer);
 
-	return total_error / num_stripes;
+	return total_error / num_frames;
 }
 
 /**
  * fpi_do_movement_estimation:
  * @ctx: #fpi_frame_asmbl_ctx - frame assembling context
  * @stripes: a singly-linked list of #fpi_frame
- * @num_stripes: number of items in @stripes to process
  *
  * fpi_do_movement_estimation() estimates the movement between adjacent
  * frames, populating @delta_x and @delta_y values for each #fpi_frame.
@@ -175,19 +169,17 @@ static unsigned int do_movement_estimation(struct fpi_frame_asmbl_ctx *ctx,
  * This function is used for devices that don't do movement estimation
  * in hardware. If hardware movement estimation is supported, the driver
  * should populate @delta_x and @delta_y instead.
- *
- * Note that @num_stripes might be shorter than the length of the list,
- * if some stripes should be skipped.
  */
 void fpi_do_movement_estimation(struct fpi_frame_asmbl_ctx *ctx,
-			    GSList *stripes, size_t num_stripes)
+				GSList                     *stripes)
 {
 	int err, rev_err;
-	err = do_movement_estimation(ctx, stripes, num_stripes, FALSE);
-	rev_err = do_movement_estimation(ctx, stripes, num_stripes, TRUE);
+
+	err = do_movement_estimation(ctx, stripes, FALSE);
+	rev_err = do_movement_estimation(ctx, stripes, TRUE);
 	fp_dbg("errors: %d rev: %d", err, rev_err);
 	if (err < rev_err) {
-		do_movement_estimation(ctx, stripes, num_stripes, FALSE);
+		do_movement_estimation(ctx, stripes, FALSE);
 	}
 }
 
@@ -256,45 +248,34 @@ static inline void aes_blit_stripe(struct fpi_frame_asmbl_ctx *ctx,
  * fpi_assemble_frames:
  * @ctx: #fpi_frame_asmbl_ctx - frame assembling context
  * @stripes: linked list of #fpi_frame
- * @num_stripes: number of items in @stripes to process
  *
  * fpi_assemble_frames() assembles individual frames into a single image.
  * It expects @delta_x and @delta_y of #fpi_frame to be populated.
  *
- * Note that @num_stripes might be shorter than the length of the list,
- * if some stripes should be skipped.
- *
  * Returns: a newly allocated #fp_img.
  */
 struct fp_img *fpi_assemble_frames(struct fpi_frame_asmbl_ctx *ctx,
-			    GSList *stripes, size_t num_stripes)
+				   GSList                     *stripes)
 {
-	GSList *stripe;
+	GSList *l;
 	struct fp_img *img;
 	int height = 0;
-	int i, y, x;
+	int y, x;
 	gboolean reverse = FALSE;
 	struct fpi_frame *fpi_frame;
 
 	//FIXME g_return_if_fail
-	BUG_ON(num_stripes == 0);
 	BUG_ON(ctx->image_width < ctx->frame_width);
 
-	/* Calculate height */
-	i = 0;
-	stripe = stripes;
-
 	/* No offset for 1st image */
-	fpi_frame = stripe->data;
+	fpi_frame = stripes->data;
 	fpi_frame->delta_x = 0;
 	fpi_frame->delta_y = 0;
-	do {
-		fpi_frame = stripe->data;
+	for (l = stripes; l != NULL; l = l->next) {
+		fpi_frame = l->data;
 
 		height += fpi_frame->delta_y;
-		i++;
-		stripe = g_slist_next(stripe);
-	} while (i < num_stripes);
+	}
 
 	fp_dbg("height is %d", height);
 
@@ -314,13 +295,11 @@ struct fp_img *fpi_assemble_frames(struct fpi_frame_asmbl_ctx *ctx,
 	img->height = height;
 
 	/* Assemble stripes */
-	i = 0;
-	stripe = stripes;
 	y = reverse ? (height - ctx->frame_height) : 0;
 	x = (ctx->image_width - ctx->frame_width) / 2;
 
-	do {
-		fpi_frame = stripe->data;
+	for (l = stripes; l != NULL; l = l->next) {
+		fpi_frame = l->data;
 
 		if(reverse) {
 			y += fpi_frame->delta_y;
@@ -333,10 +312,7 @@ struct fp_img *fpi_assemble_frames(struct fpi_frame_asmbl_ctx *ctx,
 			y += fpi_frame->delta_y;
 			x += fpi_frame->delta_x;
 		}
-
-		stripe = g_slist_next(stripe);
-		i++;
-	} while (i < num_stripes);
+	}
 
 	return img;
 }

libfprint/fpi-assembling.h

@@ -63,10 +63,10 @@ struct fpi_frame_asmbl_ctx {
 };
 
 void fpi_do_movement_estimation(struct fpi_frame_asmbl_ctx *ctx,
-			    GSList *stripes, size_t num_stripes);
+				GSList                     *stripes);
 
 struct fp_img *fpi_assemble_frames(struct fpi_frame_asmbl_ctx *ctx,
-			    GSList *stripes, size_t num_stripes);
+				   GSList                     *stripes);
 
 /**
  * fpi_line_asmbl_ctx:

libfprint/fpi-data.c

@@ -214,7 +214,7 @@ API_EXPORTED size_t fp_print_data_get_data(struct fp_print_data *data,
 		item = list_item->data;
 		out_item = (struct fpi_print_data_item_fp2 *)buf;
 		out_item->length = GUINT32_TO_LE(item->length);
-		/* FIXME: fp_print_data_item->data content is not endianess agnostic */
+		/* FIXME: fp_print_data_item->data content is not endianness agnostic */
 		memcpy(out_item->data, item->data, item->length);
 		buf += sizeof(*out_item);
 		buf += item->length;
@@ -236,7 +236,7 @@ static struct fp_print_data *fpi_print_data_from_fp1_data(unsigned char *buf,
 	data = print_data_new(GUINT16_FROM_LE(raw->driver_id),
 		GUINT32_FROM_LE(raw->devtype), raw->data_type);
 	item = fpi_print_data_item_new(print_data_len);
-	/* FIXME: fp_print_data->data content is not endianess agnostic */
+	/* FIXME: fp_print_data->data content is not endianness agnostic */
 	memcpy(item->data, raw->data, print_data_len);
 	data->prints = g_slist_prepend(data->prints, item);
 
@@ -272,7 +272,7 @@ static struct fp_print_data *fpi_print_data_from_fp2_data(unsigned char *buf,
 		total_data_len -= item_len;
 
 		item = fpi_print_data_item_new(item_len);
-		/* FIXME: fp_print_data->data content is not endianess agnostic */
+		/* FIXME: fp_print_data->data content is not endianness agnostic */
 		memcpy(item->data, raw_item->data, item_len);
 		data->prints = g_slist_prepend(data->prints, item);
 

libfprint/fpi-img.c

@@ -405,7 +405,7 @@ int fpi_img_to_print_data(struct fp_img_dev *imgdev, struct fp_img *img,
 		}
 	}
 
-	/* FIXME: space is wasted if we dont hit the max minutiae count. would
+	/* FIXME: space is wasted if we don't hit the max minutiae count. would
 	 * be good to make this dynamic. */
 	print = fpi_print_data_new(FP_DEV(imgdev));
 	item = fpi_print_data_item_new(sizeof(struct xyt_struct));

libfprint/fpi-sync.c

@@ -149,7 +149,7 @@ static void enroll_stop_cb(struct fp_dev *dev, void *user_data)
  * or I/O problems.
  *
  * The RETRY codes from #fp_enroll_result may be returned from any enroll
- * stage. These codes indicate that the scan was not succesful in that the
+ * stage. These codes indicate that the scan was not successful in that the
  * user did not position their finger correctly or similar. When a RETRY code
  * is returned, the enrollment stage is <emphasis role="strong">not</emphasis> advanced, so the next call
  * into this function will retry the current stage again. The current stage may