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Date:   Sun, 12 Jun 2022 19:22:44 +0200
From:   Samuel Thibault <samuel.thibault@ens-lyon.org>
To:     gregkh@linuxfoundation.org
Cc:     linux-kernel@vger.kernel.org, speakup@linux-speakup.org
Subject: [PATCHv4] speakup: Generate speakupmap.h automatically
Message-ID: <20220612172244.il3siyq7ueqnvah5@begin>
Mail-Followup-To: Samuel Thibault <samuel.thibault@ens-lyon.org>,
        gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
        speakup@linux-speakup.org
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: NeoMutt/20170609 (1.8.3)
Precedence: bulk

speakupmap.h was not actually intended to be source code, speakupmap.map
is.

This resurrects the makemapdata.c and genmap.c tools to generate
speakupmap.h automatically from the input and speakup headers, and the
speakupmap.map keyboard mapping source file.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>

---
difference with v3:
- Fix out-of-tree builds

difference with v2:
- Stuff utils.c into utils.h
- Add .gitignore

difference with v1:
- Add missing dependency between main.c and speakupmap.h

 drivers/accessibility/speakup/.gitignore    |    4 
 drivers/accessibility/speakup/Makefile      |   28 ++++
 drivers/accessibility/speakup/genmap.c      |  162 ++++++++++++++++++++++++++++
 drivers/accessibility/speakup/makemapdata.c |  125 +++++++++++++++++++++
 drivers/accessibility/speakup/speakupmap.h  |   66 -----------
 drivers/accessibility/speakup/utils.h       |  102 +++++++++++++++++
 6 files changed, 421 insertions(+), 66 deletions(-)

--- a/drivers/accessibility/speakup/Makefile
+++ b/drivers/accessibility/speakup/Makefile
@@ -30,3 +30,31 @@ speakup-y := \
 	thread.o \
 	varhandlers.o
 speakup-$(CONFIG_SPEAKUP_SERIALIO) += serialio.o
+
+
+clean-files := mapdata.h speakupmap.h
+
+
+# Generate mapdata.h from headers
+hostprogs += makemapdata
+makemapdata-objs := makemapdata.o
+
+quiet_cmd_mkmap = MKMAP   $@
+      cmd_mkmap = TOPDIR=$(srctree) $(obj)/makemapdata > $@
+
+$(obj)/mapdata.h: $(obj)/makemapdata
+	$(call cmd,mkmap)
+
+
+# Generate speakupmap.h from mapdata.h
+hostprogs += genmap
+genmap-objs := genmap.o
+$(obj)/genmap.o: $(obj)/mapdata.h
+
+quiet_cmd_genmap = GENMAP  $@
+      cmd_genmap = $(obj)/genmap $< > $@
+
+$(obj)/speakupmap.h: $(src)/speakupmap.map $(obj)/genmap
+	$(call cmd,genmap)
+
+$(obj)/main.o: $(obj)/speakupmap.h
--- /dev/null
+++ b/drivers/accessibility/speakup/genmap.c
@@ -0,0 +1,162 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* genmap.c
+ * originally written by: Kirk Reiser.
+ *
+ ** Copyright (C) 2002  Kirk Reiser.
+ *  Copyright (C) 2003  David Borowski.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <libgen.h>
+#include <string.h>
+#include <linux/version.h>
+#include <ctype.h>
+#include "utils.h"
+
+struct st_key_init {
+	char *name;
+	int value, shift;
+};
+
+static unsigned char key_data[MAXKEYVAL][16], *kp;
+
+#include "mapdata.h"
+
+static const char delims[] = "\t\n ";
+static char *cp;
+static int map_ver = 119; /* an arbitrary number so speakup can check */
+static int shift_table[17];
+static int max_states = 1, flags;
+/* flags reserved for later, maybe for individual console maps */
+
+static int get_shift_value(int state)
+{
+	int i;
+
+	for (i = 0; shift_table[i] != state; i++) {
+		if (shift_table[i] == -1) {
+			if (i >= 16)
+				oops("too many shift states", NULL);
+			shift_table[i] = state;
+			max_states = i+1;
+		break;
+	}
+	}
+	return i;
+}
+
+int
+main(int argc, char *argv[])
+{
+	int value, shift_state, i, spk_val = 0, lock_val = 0;
+	int max_key_used = 0, num_keys_used = 0;
+	struct st_key *this;
+	struct st_key_init *p_init;
+	char buffer[256];
+
+	bzero(key_table, sizeof(key_table));
+	bzero(key_data, sizeof(key_data));
+
+	shift_table[0] = 0;
+	for (i = 1; i <= 16; i++)
+		shift_table[i] = -1;
+
+	if (argc < 2) {
+		fputs("usage: genmap filename\n", stderr);
+		exit(1);
+	}
+
+	for (p_init = init_key_data; p_init->name[0] != '.'; p_init++)
+		add_key(p_init->name, p_init->value, p_init->shift);
+
+	open_input(NULL, argv[1]);
+	while (fgets(buffer, sizeof(buffer), infile)) {
+		lc++;
+		value = shift_state = 0;
+
+		cp = strtok(buffer, delims);
+		if (*cp == '#')
+			continue;
+
+		while (cp) {
+			if (*cp == '=')
+				break;
+			this = find_key(cp);
+			if (this == NULL)
+				oops("unknown key/modifier", cp);
+			if (this->shift == is_shift) {
+				if (value)
+					oops("modifiers must come first", cp);
+				shift_state += this->value;
+			} else if (this->shift == is_input)
+				value = this->value;
+			else
+				oops("bad modifier or key", cp);
+			cp = strtok(0, delims);
+		}
+		if (!cp)
+			oops("no = found", NULL);
+
+		cp = strtok(0, delims);
+		if (!cp)
+			oops("no speakup function after =", NULL);
+
+		this = find_key(cp);
+		if (this == NULL || this->shift != is_spk)
+			oops("invalid speakup function", cp);
+
+		i = get_shift_value(shift_state);
+		if (key_data[value][i]) {
+			while (--cp > buffer)
+				if (!*cp)
+					*cp = ' ';
+			oops("two functions on same key combination", cp);
+		}
+		key_data[value][i] = (char)this->value;
+		if (value > max_key_used)
+			max_key_used = value;
+	}
+	fclose(infile);
+
+	this = find_key("spk_key");
+	if (this)
+		spk_val = this->value;
+
+	this = find_key("spk_lock");
+	if (this)
+		lock_val = this->value;
+
+	for (lc = 1; lc <= max_key_used; lc++) {
+		kp = key_data[lc];
+		if (!memcmp(key_data[0], kp, 16))
+			continue;
+		num_keys_used++;
+		for (i = 0; i < max_states; i++) {
+			if (kp[i] != spk_val && kp[i] != lock_val)
+				continue;
+			shift_state = shift_table[i];
+			if (shift_state&16)
+				continue;
+			shift_state = get_shift_value(shift_state+16);
+			kp[shift_state] = kp[i];
+			/* fill in so we can process the key up, as spk bit will be set */
+		}
+	}
+
+	printf("\t%d, %d, %d,\n\t", map_ver, num_keys_used, max_states);
+	for (i = 0; i < max_states; i++)
+		printf("%d, ", shift_table[i]);
+	printf("%d,", flags);
+	for (lc = 1; lc <= max_key_used; lc++) {
+		kp = key_data[lc];
+		if (!memcmp(key_data[0], kp, 16))
+			continue;
+		printf("\n\t%d,", lc);
+		for (i = 0; i < max_states; i++)
+			printf(" %d,", (unsigned int)kp[i]);
+	}
+	printf("\n\t0, %d\n", map_ver);
+
+	exit(0);
+}
--- /dev/null
+++ b/drivers/accessibility/speakup/makemapdata.c
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* makemapdata.c
+ * originally written by: Kirk Reiser.
+ *
+ ** Copyright (C) 2002  Kirk Reiser.
+ *  Copyright (C) 2003  David Borowski.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <libgen.h>
+#include <string.h>
+#include <linux/version.h>
+#include <ctype.h>
+#include "utils.h"
+
+static char buffer[256];
+
+static int get_define(void)
+{
+	char *c;
+
+	while (fgets(buffer, sizeof(buffer)-1, infile)) {
+		lc++;
+		if (strncmp(buffer, "#define", 7))
+			continue;
+		c = buffer + 7;
+		while (*c == ' ' || *c == '\t')
+			c++;
+		def_name = c;
+		while (*c && *c != ' ' && *c != '\t' && *c != '\n')
+			c++;
+		if (!*c || *c == '\n')
+			continue;
+		*c++ = '\0';
+		while (*c == ' ' || *c == '\t' || *c == '(')
+			c++;
+		def_val = c;
+		while (*c && *c != '\n' && *c != ')')
+			c++;
+		*c++ = '\0';
+		return 1;
+	}
+	fclose(infile);
+	infile = 0;
+	return 0;
+}
+
+int
+main(int argc, char *argv[])
+{
+	int value, i;
+	struct st_key *this;
+	const char *dir_name;
+	char *cp;
+
+	dir_name = getenv("TOPDIR");
+	if (!dir_name)
+		dir_name = ".";
+	bzero(key_table, sizeof(key_table));
+	add_key("shift",	1, is_shift);
+	add_key("altgr",	2, is_shift);
+	add_key("ctrl",	4, is_shift);
+	add_key("alt",	8, is_shift);
+	add_key("spk", 16, is_shift);
+	add_key("double", 32, is_shift);
+
+	open_input(dir_name, "include/linux/input.h");
+	while (get_define()) {
+		if (strncmp(def_name, "KEY_", 4))
+			continue;
+		value = atoi(def_val);
+		if (value > 0 && value < MAXKEYVAL)
+			add_key(def_name, value, is_input);
+	}
+
+	open_input(dir_name, "include/uapi/linux/input-event-codes.h");
+	while (get_define()) {
+		if (strncmp(def_name, "KEY_", 4))
+			continue;
+		value = atoi(def_val);
+		if (value > 0 && value < MAXKEYVAL)
+			add_key(def_name, value, is_input);
+	}
+
+	open_input(dir_name, "drivers/accessibility/speakup/spk_priv_keyinfo.h");
+	while (get_define()) {
+		if (strlen(def_val) > 5) {
+			//if (def_val[0] == '(')
+			//	def_val++;
+			cp = strchr(def_val, '+');
+			if (!cp)
+				continue;
+			if (cp[-1] == ' ')
+				cp[-1] = '\0';
+			*cp++ = '\0';
+			this = find_key(def_val);
+			while (*cp == ' ')
+				cp++;
+			if (!this || *cp < '0' || *cp > '9')
+				continue;
+			value = this->value+atoi(cp);
+		} else if (!strncmp(def_val, "0x", 2))
+			sscanf(def_val+2, "%x", &value);
+		else if (*def_val >= '0' && *def_val <= '9')
+			value = atoi(def_val);
+		else
+			continue;
+		add_key(def_name, value, is_spk);
+	}
+
+	printf("struct st_key_init init_key_data[] = {\n");
+	for (i = 0; i < HASHSIZE; i++) {
+		this = &key_table[i];
+		if (!this->name)
+			continue;
+		do {
+			printf("\t{ \"%s\", %d, %d, },\n", this->name, this->value, this->shift);
+			this = this->next;
+		} while (this);
+	}
+	printf("\t{ \".\", 0, 0 }\n};\n");
+
+	exit(0);
+}
--- a/drivers/accessibility/speakup/speakupmap.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-	119, 62, 6,
-	0, 16, 20, 17, 32, 48, 0,
-	2, 0, 78, 0, 0, 0, 0,
-	3, 0, 79, 0, 0, 0, 0,
-	4, 0, 76, 0, 0, 0, 0,
-	5, 0, 77, 0, 0, 0, 0,
-	6, 0, 74, 0, 0, 0, 0,
-	7, 0, 75, 0, 0, 0, 0,
-	9, 0, 5, 46, 0, 0, 0,
-	10, 0, 4, 0, 0, 0, 0,
-	11, 0, 0, 1, 0, 0, 0,
-	12, 0, 27, 0, 33, 0, 0,
-	19, 0, 47, 0, 0, 0, 0,
-	21, 0, 29, 17, 0, 0, 0,
-	22, 0, 15, 0, 0, 0, 0,
-	23, 0, 14, 0, 0, 0, 28,
-	24, 0, 16, 0, 0, 0, 0,
-	25, 0, 30, 18, 0, 0, 0,
-	28, 0, 3, 26, 0, 0, 0,
-	35, 0, 31, 0, 0, 0, 0,
-	36, 0, 12, 0, 0, 0, 0,
-	37, 0, 11, 0, 0, 0, 22,
-	38, 0, 13, 0, 0, 0, 0,
-	39, 0, 32, 7, 0, 0, 0,
-	40, 0, 23, 0, 0, 0, 0,
-	44, 0, 44, 0, 0, 0, 0,
-	49, 0, 24, 0, 0, 0, 0,
-	50, 0, 9, 19, 6, 0, 0,
-	51, 0, 8, 0, 0, 0, 36,
-	52, 0, 10, 20, 0, 0, 0,
-	53, 0, 25, 0, 0, 0, 0,
-	55, 46, 1, 0, 0, 0, 0,
-	58, 128, 128, 0, 0, 0, 0,
-	59, 0, 45, 0, 0, 0, 0,
-	60, 0, 40, 0, 0, 0, 0,
-	61, 0, 41, 0, 0, 0, 0,
-	62, 0, 42, 0, 0, 0, 0,
-	63, 0, 34, 0, 0, 0, 0,
-	64, 0, 35, 0, 0, 0, 0,
-	65, 0, 37, 0, 0, 0, 0,
-	66, 0, 38, 0, 0, 0, 0,
-	67, 0, 66, 0, 39, 0, 0,
-	68, 0, 67, 0, 0, 0, 0,
-	71, 15, 19, 0, 0, 0, 0,
-	72, 14, 29, 0, 0, 28, 0,
-	73, 16, 17, 0, 0, 0, 0,
-	74, 27, 33, 0, 0, 0, 0,
-	75, 12, 31, 0, 0, 0, 0,
-	76, 11, 21, 0, 0, 22, 0,
-	77, 13, 32, 0, 0, 0, 0,
-	78, 23, 43, 0, 0, 0, 0,
-	79, 9, 20, 0, 0, 0, 0,
-	80, 8, 30, 0, 0, 36, 0,
-	81, 10, 18, 0, 0, 0, 0,
-	82, 128, 128, 0, 0, 0, 0,
-	83, 24, 25, 0, 0, 0, 0,
-	87, 0, 68, 0, 0, 0, 0,
-	88, 0, 69, 0, 0, 0, 0,
-	96, 3, 26, 0, 0, 0, 0,
-	98, 4, 5, 0, 0, 0, 0,
-	99, 2, 0, 0, 0, 0, 0,
-	104, 0, 6, 0, 0, 0, 0,
-	109, 0, 7, 0, 0, 0, 0,
-	125, 128, 128, 0, 0, 0, 0,
-	0, 119
--- /dev/null
+++ b/drivers/accessibility/speakup/utils.h
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* utils.h
+ * originally written by: Kirk Reiser.
+ *
+ ** Copyright (C) 2002  Kirk Reiser.
+ *  Copyright (C) 2003  David Borowski.
+ */
+
+#include <stdio.h>
+
+#define MAXKEYS 512
+#define MAXKEYVAL 160
+#define HASHSIZE 101
+#define is_shift -3
+#define is_spk -2
+#define is_input -1
+
+struct st_key {
+	char *name;
+	struct st_key *next;
+	int value, shift;
+};
+
+struct st_key key_table[MAXKEYS];
+struct st_key *extra_keys = key_table+HASHSIZE;
+char *def_name, *def_val;
+FILE *infile;
+int lc;
+
+char filename[256];
+
+static inline void open_input(const char *dir_name, const char *name)
+{
+	if (dir_name)
+		snprintf(filename, sizeof(filename), "%s/%s", dir_name, name);
+	else
+		snprintf(filename, sizeof(filename), "%s", name);
+	infile = fopen(filename, "r");
+	if (infile == 0) {
+		fprintf(stderr, "can't open %s\n", filename);
+		exit(1);
+	}
+	lc = 0;
+}
+
+static inline int oops(const char *msg, const char *info)
+{
+	if (info == NULL)
+		info = "";
+	fprintf(stderr, "error: file %s line %d\n", filename, lc);
+	fprintf(stderr, "%s %s\n", msg, info);
+	exit(1);
+}
+
+static inline struct st_key *hash_name(char *name)
+{
+	u_char *pn = (u_char *)name;
+	int hash = 0;
+
+	while (*pn) {
+		hash = (hash * 17) & 0xfffffff;
+		if (isupper(*pn))
+			*pn = tolower(*pn);
+		hash += (int)*pn;
+		pn++;
+	}
+	hash %= HASHSIZE;
+	return &key_table[hash];
+}
+
+static inline struct st_key *find_key(char *name)
+{
+	struct st_key *this = hash_name(name);
+
+	while (this) {
+		if (this->name && !strcmp(name, this->name))
+			return this;
+		this = this->next;
+	}
+	return this;
+}
+
+static inline struct st_key *add_key(char *name, int value, int shift)
+{
+	struct st_key *this = hash_name(name);
+
+	if (extra_keys-key_table >= MAXKEYS)
+		oops("out of key table space, enlarge MAXKEYS", NULL);
+	if (this->name != NULL) {
+		while (this->next) {
+			if (!strcmp(name, this->name))
+				oops("attempt to add duplicate key", name);
+			this = this->next;
+		}
+		this->next = extra_keys++;
+		this = this->next;
+	}
+	this->name = strdup(name);
+	this->value = value;
+	this->shift = shift;
+	return this;
+}
--- /dev/null
+++ b/drivers/accessibility/speakup/.gitignore
@@ -0,0 +1,4 @@
+/makemapdata
+/mapdata.h
+/genmap
+/speakupmap.h