Support for special characters in gfx.text; added scrolling to the default shell; updated sftdlib.

There is a known bug with different text size in sftdlib.

libs/sftdlib/libsftd/source/int_htab.c

@@ -0,0 +1,124 @@
+#include <stdlib.h>
+#include <string.h>
+#include "int_htab.h"
+
+static inline unsigned int FNV_1a(unsigned int key)
+{
+	unsigned char *bytes = (unsigned char *)&key;
+	unsigned int hash = 2166136261U;
+	hash = (16777619U * hash) ^ bytes[0];
+	hash = (16777619U * hash) ^ bytes[1];
+	hash = (16777619U * hash) ^ bytes[2];
+	hash = (16777619U * hash) ^ bytes[3];
+	return hash;
+}
+
+int_htab *int_htab_create(size_t size)
+{
+	int_htab *htab = malloc(sizeof(*htab));
+	if (!htab)
+		return NULL;
+
+	htab->size = size;
+	htab->used = 0;
+
+	htab->entries = malloc(htab->size * sizeof(*htab->entries));
+	memset(htab->entries, 0, htab->size * sizeof(*htab->entries));
+
+	return htab;
+}
+
+void int_htab_free(int_htab *htab)
+{
+	int i;
+	for (i = 0; i < htab->size; i++) {
+		if (htab->entries[i].value != NULL)
+			free(htab->entries[i].value);
+	}
+	free(htab);
+}
+
+void int_htab_resize(int_htab *htab, unsigned int new_size)
+{
+	int i;
+	int_htab_entry *old_entries;
+	unsigned int old_size;
+
+	old_entries = htab->entries;
+	old_size = htab->size;
+
+	htab->size = new_size;
+	htab->used = 0;
+	htab->entries = malloc(new_size * sizeof(*htab->entries));
+	memset(htab->entries, 0, new_size * sizeof(*htab->entries));
+
+	for (i = 0; i < old_size; i++) {
+		if (old_entries[i].value != NULL) {
+			int_htab_insert(htab, old_entries[i].key, old_entries[i].value);
+		}
+	}
+
+	free(old_entries);
+}
+
+int int_htab_insert(int_htab *htab, unsigned int key, void *value)
+{
+	if (value == NULL)
+		return 0;
+
+	/* Calculate the current load factor */
+	if (((htab->used + 1)*100)/htab->size > INT_HTAB_MAX_LOAD) {
+		int_htab_resize(htab, 2*htab->size);
+	}
+
+	unsigned int mask = htab->size - 1;
+	unsigned int idx = FNV_1a(key) & mask;
+
+	/* Open addressing, linear probing */
+	while (htab->entries[idx].value != NULL) {
+		idx = (idx + 1) & mask;
+	}
+
+	htab->entries[idx].key = key;
+	htab->entries[idx].value = value;
+	htab->used++;
+
+	return 1;
+}
+
+void *int_htab_find(const int_htab *htab, unsigned int key)
+{
+	unsigned int mask = htab->size - 1;
+	unsigned int idx = FNV_1a(key) & mask;
+
+	/* Open addressing, linear probing */
+	while (htab->entries[idx].key != key && htab->entries[idx].value != NULL) {
+		idx = (idx + 1) & mask;
+	}
+
+	/* Found the key */
+	if (htab->entries[idx].key == key) {
+		return htab->entries[idx].value;
+	}
+
+	return NULL;
+}
+
+int int_htab_erase(const int_htab *htab, unsigned int key)
+{
+	unsigned int mask = htab->size - 1;
+	unsigned int idx = FNV_1a(key) & mask;
+
+	/* Open addressing, linear probing */
+	while (htab->entries[idx].key != key && htab->entries[idx].value != NULL) {
+		idx = (idx + 1) & mask;
+	}
+
+	/* Found the key */
+	if (htab->entries[idx].key == key) {
+		htab->entries[idx].value = NULL;
+		return 1;
+	}
+
+	return 0;
+}