Add support for actually reading keymaps

1 files changed, 271 insertions, 33 deletions

diff --git a/rcm-server-keymap.c b/rcm-server-keymap.c
index a5c194e..41c9216 100644
--- a/rcm-server-keymap.c
+++ b/rcm-server-keymap.c
@@ -9,29 +9,245 @@
 #include <fcntl.h>
 #include <dirent.h>
 #include <unistd.h>
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
 
 #include "utils.h"
 #include "rcm-server.h"
 #include "rcm-server-keymap.h"
 
-struct keymap *
-find_keymap_by_name(struct device *dev, const char *name)
+enum ini_section {
+	INI_SECTION_UNDEFINED,
+	INI_SECTION_DESCRIPTION,
+	INI_SECTION_KEYMAP,
+	INI_SECTION_LAYOUT,
+};
+
+struct inis {
+	const char *name;
+	enum ini_section value;
+};
+
+struct inis iniss[] = {
+	{ .name = "Description", .value = INI_SECTION_DESCRIPTION },
+	{ .name = "Keymap", .value = INI_SECTION_KEYMAP },
+	{ .name = "Layout", .value = INI_SECTION_LAYOUT },
+	{ .name = NULL, .value = INI_SECTION_UNDEFINED },
+};
+
+static int strtol_strict(const char *str, int *result)
 {
-	struct keymap *keymap;
+	char *end;
+	long val;
 
-	list_for_each_entry(keymap, &dev->keymaps, list)
-		if (!strcmp(keymap->name, name))
-			return keymap;
+	errno = 0;
+	val = strtol(str, &end, 10);
 
-	return NULL;
+	if (errno == ERANGE && (val == LONG_MAX || val == LONG_MIN))
+		return -EINVAL;
+
+	if (errno != 0 && val == 0)
+		return -EINVAL;
+
+	if (end == str)
+		return -EINVAL;
+
+	if (*end != '\0')
+		return -EINVAL;
+
+	if (val < 1 || val > UINT16_MAX)
+		return -EINVAL;
+
+	*result = val;
+	return 0;
+}
+
+static int
+keymap_parse(FILE *fp, char **line, size_t *buf_size, struct keymap *keymap,
+	     uint16_t *rows_return, uint16_t *cols_return,
+	     unsigned *keycode_count_return)
+{
+	unsigned keycode_count = 0;
+	unsigned layout_count = 0;
+	int rows = -1;
+	int cols = -1;
+	unsigned i;
+	enum ini_section current_section = INI_SECTION_UNDEFINED;
+	int r;
+
+	rewind(fp);
+
+	while (getline(line, buf_size, fp) != -1) {
+		char *p, *tmp;
+
+		p = strchr(*line, '\n');
+		if (!p)
+			continue;
+		*p = '\0';
+
+		p = *line;
+		while (isspace(*p))
+			p++;
+
+		if (*p == '\0' || *p == ';' || *p == '#')
+			continue;
+
+		if (*p == '[') {
+			p++;
+			tmp = strchr(p, ']');
+			if (!tmp)
+				continue;
+			*tmp = '\0';
+
+			for (i = 0; iniss[i].name; i++) {
+				if (strcasecmp(iniss[i].name, p))
+					continue;
+				current_section = iniss[i].value;
+				break;
+			}
+
+			if (!iniss[i].name)
+				current_section = INI_SECTION_UNDEFINED;
+
+			continue;
+		}
+
+		tmp = strchr(p, '=');
+		if (!tmp)
+			continue;
+
+		*tmp++ = '\0';
+		while (isspace(*tmp))
+			tmp++;
+
+		if (*tmp == '\0')
+			continue;
+
+		/* FIXME: eat RHS whitespace for p */
+		switch (current_section) {
+		case INI_SECTION_DESCRIPTION:
+			if (!keymap)
+				continue;
+
+			if (!strcasecmp(p, "Name")) {
+				keymap->name = strdup(tmp);
+				if (!keymap->name)
+					return -ENOMEM;
+			} else if (!strcasecmp(p, "Description")) {
+				keymap->desc = strdup(tmp);
+				if (!keymap->desc)
+					return -ENOMEM;
+			}
+			break;
+		case INI_SECTION_KEYMAP:
+			if (!strcasecmp(p, "Map")) {
+				if (keymap) {
+					keymap->keycodes[keycode_count].name = "apan";
+					keymap->keycodes[keycode_count].value = "papan";
+				}
+				keycode_count++;
+			} else {
+				fprintf(stderr, "Unknown parameter: %s\n", p);
+			}
+
+			break;
+		case INI_SECTION_LAYOUT:
+			if (!strcasecmp(p, "Rows")) {
+				if (rows >= 0) {
+					fprintf(stderr, "Multiple rows specifications\n");
+					return -EINVAL;
+				}
+
+				r = strtol_strict(tmp, &rows);
+				if (r < 0) {
+					fprintf(stderr, "Invalid rows specification\n");
+					return -EINVAL;
+				}
+
+			} else if (!strcasecmp(p, "Cols")) {
+				if (cols >= 0) {
+					fprintf(stderr, "Multiple cols specifications\n");
+					return -EINVAL;
+				}
+
+				r = strtol_strict(tmp, &cols);
+				if (r < 0) {
+					fprintf(stderr, "Invalid cols specification\n");
+					return -EINVAL;
+				}
+
+			} else if (!strcasecmp(p, "Button")) {
+				if (keymap)
+					keymap->layout[layout_count] = &keymap->keycodes[1];
+				layout_count++;
+
+			} else {
+				fprintf(stderr, "Unknown parameter: %s\n", p);
+			}
+			break;
+		case INI_SECTION_UNDEFINED:
+			break;
+		default:
+			printf("Line: %i - %s = %s\n", current_section, p, tmp);
+			break;
+		}
+	}
+
+	if (rows < 0) {
+		fprintf(stderr, "Rows specification missing\n");
+		return -EINVAL;
+	}
+
+	if (cols < 0) {
+		fprintf(stderr, "Cols specification missing\n");
+		return -EINVAL;
+	}
+
+	if (keycode_count < 1) {
+		fprintf(stderr, "No keycodes found\n");
+		return -EINVAL;
+	}
+
+	if (layout_count < 1) {
+		fprintf(stderr, "No layout found\n");
+		return -EINVAL;
+	}
+
+	if (rows * cols != layout_count) {
+		fprintf(stderr, "Layout does not match rows x cols\n");
+		return -EINVAL;
+	}
+
+	if (keymap) {
+		keymap->rows = rows;
+		keymap->cols = cols;
+		keymap->keycode_count = keycode_count;
+	}
+
+	if (rows_return)
+		*rows_return = rows;
+
+	if (cols_return)
+		*cols_return = cols;
+
+	if (keycode_count_return)
+		*keycode_count_return = keycode_count;
+
+	return 0;
 }
 
 static struct keymap *
 keymap_read(int dfd, const char *name)
 {
-	int fd;
-	struct keymap *keymap;
-	unsigned i;
+	_cleanup_close_ int fd = -1;
+	_cleanup_fclose_ FILE *fp = NULL;
+	_cleanup_free_ char *line = NULL;
+	struct keymap *keymap = NULL;
+	uint16_t cols, rows;
+	unsigned keycode_count;
+	size_t buf_size = 0;
+	unsigned r;
 
 	if (dfd < 0 || !name)
 		return NULL;
@@ -40,36 +256,35 @@ keymap_read(int dfd, const char *name)
 	if (fd < 0)
 		return NULL;
 
-	keymap = zmalloc(sizeof(*keymap) + (8 * 3) * sizeof(struct keycode));
-	if (!keymap) {
-		close(fd);
+	fp = fdopen(fd, "r");
+	if (!fp)
 		return NULL;
-	}
+	fd = -1;
 
-	keymap->name = strdup(name);
-	if (!keymap->name) {
-		close(fd);
-		free(keymap);
+	r = keymap_parse(fp, &line, &buf_size, NULL, &rows, &cols, &keycode_count);
+	if (r < 0) {
+		fprintf(stderr, "Invalid keymap: %s\n", name);
 		return NULL;
 	}
 
-	keymap->cols = 3;
-	keymap->rows = 8;
+	keymap = zmalloc(sizeof(*keymap) + sizeof(struct keycode) * keycode_count);
+	if (!keymap)
+		return NULL;
 
-	for (i = 0; i < (keymap->cols * keymap->rows); i++) {
-		keymap->keycodes[i].name = "key-1-2";
-		keymap->keycodes[i].value = "KEY_COFFEE";
+	keymap->layout = zmalloc(sizeof(struct keycode *) * cols * rows);
+	if (!keymap->layout) {
+		free(keymap);
+		return NULL;
 	}
-	/* FIXME: Actually read the keymap :) */
 
-	close(fd);
+	keymap_parse(fp, &line, &buf_size, keymap, NULL, NULL, NULL);
 	return keymap;
 }
 
 static int
 keymaps_load_dir(struct device *device, const char *path)
 {
-	DIR *dir;
+	_cleanup_closedir_ DIR *dir = NULL;
 	int dfd;
 	struct dirent *dent;
 	struct keymap *keymap;
@@ -79,28 +294,30 @@ keymaps_load_dir(struct device *device, const char *path)
 		return -1;
 
 	dfd = dirfd(dir);
-	if (dfd < 0) {
-		closedir(dir);
+	if (dfd < 0)
 		return -1;
-	}
 
 	while ((dent = readdir(dir))) {
 		switch (dent->d_type) {
 		case DT_REG:
 		case DT_LNK:
 		case DT_UNKNOWN:
-			keymap = keymap_read(dfd, dent->d_name);
+			keymap = find_keymap_by_name(device, dent->d_name);
 			if (keymap)
+				continue;
+			keymap = keymap_read(dfd, dent->d_name);
+			if (keymap) {
+				printf("Keymap added (0x%p)\n", keymap);
+				printf("\tDescription: %s\n", keymap->desc);
+				printf("\tName: %s\n", keymap->name);
 				list_add(&keymap->list, &device->keymaps);
+			}
 			break;
 		default:
 			break;
 		}
 	}
 
-	if (closedir(dir) < 0)
-		return -1;
-
 	return 0;
 }
 
@@ -119,3 +336,24 @@ keymaps_load(struct device *device)
 	return 0;
 }
 
+void
+keymap_free(struct keymap *keymap)
+{
+	free(keymap->layout);
+	free(keymap->name);
+	free(keymap->desc);
+	free(keymap);
+}
+
+struct keymap *
+find_keymap_by_name(struct device *dev, const char *name)
+{
+	struct keymap *keymap;
+
+	list_for_each_entry(keymap, &dev->keymaps, list)
+		if (!strcmp(keymap->name, name))
+			return keymap;
+
+	return NULL;
+}
+