From 2b265ea0eb5825eccd3b9b072b5014bacf0d16d7 Mon Sep 17 00:00:00 2001
From: Oxore <oxore@protonmail.com>
Date: Wed, 11 Jul 2018 07:04:47 +0300
Subject: Migrate displayable text to utf32

---
 src/engine.c  | 15 ++++++++++-----
 src/painter.c |  4 ++--
 src/text.c    | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 3 files changed, 66 insertions(+), 10 deletions(-)

(limited to 'src')

diff --git a/src/engine.c b/src/engine.c
index 59de551..a087fd2 100644
--- a/src/engine.c
+++ b/src/engine.c
@@ -4,7 +4,6 @@
 #include <SFML/System/Clock.h>
 #include <SFML/Window/Keyboard.h>
 #include <SFML/Graphics/RenderWindow.h>
-#include <SFML/Graphics/Text.h>
 
 #include "common.h"
 #include "idlist.h"
@@ -75,8 +74,11 @@ static void render_score_value(void *obj)
     struct text *text = obj;
     if (!strcmp(text->type, "score.value")) {
         if (!text->text)
-            text->text = malloc(sizeof(char) * BUFSIZ);
-        sprintf(text->text, "%d", game.scoreCurrent);
+            text->text = calloc(BUFSIZ, sizeof(char));
+        char *a = calloc(BUFSIZ, sizeof(char));
+        sprintf(a, "%d", game.scoreCurrent);
+        utf8to32_strcpy(text->text, a);
+        free(a);
     }
 }
 
@@ -85,8 +87,11 @@ static void render_level_value(void *obj)
     struct text *text = obj;
     if (!strcmp(text->type, "level.value")) {
         if (!text->text)
-            text->text = malloc(sizeof(char) * BUFSIZ);
-        sprintf(text->text, "%d", game.level);
+            text->text = calloc(BUFSIZ, sizeof(char));
+        char *a = calloc(BUFSIZ, sizeof(char));
+        sprintf(a, "%d", game.level);
+        utf8to32_strcpy(text->text, a);
+        free(a);
     }
 }
 
diff --git a/src/painter.c b/src/painter.c
index c0e93ea..9dabeb8 100644
--- a/src/painter.c
+++ b/src/painter.c
@@ -185,7 +185,7 @@ unsigned long painter_register_text(struct text *txt)
     sfText_setCharacterSize(t->text, txt->size);
     sfVector2f pos = (sfVector2f){.x = txt->pos.x, .y = txt->pos.y};
     sfText_setPosition(t->text, pos);
-    sfText_setString(t->text, txt->text);
+    sfText_setUnicodeString(t->text, (unsigned int *)txt->text);
 
     last->obj = t;
     return last->id;
@@ -201,7 +201,7 @@ void painter_update_text(unsigned long id, struct text *txt)
     sfText_setCharacterSize(t->text, txt->size);
     sfVector2f pos = (sfVector2f){.x = txt->pos.x, .y = txt->pos.y};
     sfText_setPosition(t->text, pos);
-    sfText_setString(t->text, txt->text);
+    sfText_setUnicodeString(t->text, (unsigned int *)txt->text);
 }
 
 static void draw_text_drawable(struct drawable *d)
diff --git a/src/text.c b/src/text.c
index a61d28a..6d7cc83 100644
--- a/src/text.c
+++ b/src/text.c
@@ -11,11 +11,62 @@
 #include "vector.h"
 #include "text.h"
 
+static inline unsigned int utf8_char_len(unsigned char c)
+{
+    if (c > 0x00 && c < 0xC0)
+        return 1;
+    else if (c >= 0xC2 && c < 0xE0)
+        return 2;
+    else if (c >= 0xE0 && c < 0xF0)
+        return 3;
+    else if (c >= 0xF0 && c < 0xF5)
+        return 4;
+    else
+        return 0;
+}
+
+unsigned long utf8_strlen(void *string)
+{
+    unsigned long len = 0, keep = 0;
+    for (unsigned char *c = string; *c; (keep ? --keep : ++len), ++c)
+        if (!keep)
+            keep = (keep = utf8_char_len(*c)) ? keep - 1 : keep;
+    return len;
+}
+
+void utf8to32_strcpy(wchar_t *dest, char *src)
+{
+    wchar_t *dc = dest;
+    char *c = src;
+    unsigned long len = 0;
+    while (*c) {
+        int clen = utf8_char_len(*c);
+        if (clen == 1) {
+            dc[len] = c[0] & 0x7f;
+            c += 1;
+        } else if (clen == 2) {
+            dc[len] = ((c[0] & 0x1f) << 6) | ((c[1] & 0x3f) << 0);
+            c += 2;
+        } else if (clen == 3) {
+            dc[len] = ((c[0] & 0x0f) << 12) | ((c[1] & 0x3f) << 6) | ((c[2] & 0x3f) << 0);
+            c += 3;
+        } else if (clen == 4) {
+            dc[len] = ((c[0] & 0x07) << 18) | ((c[1] & 0x3f) << 12) | ((c[2] & 0x3f) << 6) | ((c[3] & 0x3f) << 0);
+            c += 4;
+        } else {
+            dc[len] = 0;
+            return;
+        }
+        ++len;
+    }
+    dc[len] = 0;
+}
+
 static FILE *openFile(char *filename)
 {
     FILE *file;
     if (!(file = fopen(filename, "rb"))){
-        printf("ERROR: fild \"%s\"cannot be opened\n", filename);
+        printf("ERROR: file \"%s\"cannot be opened\n", filename);
         exit(EXIT_FAILURE);
     }
     return file;
@@ -65,8 +116,8 @@ struct idlist *load_texts(char *filename)
                 text->scene = malloc(sizeof(char) * (strlen((char *)ev.data.scalar.value) + 1));
                 strcpy(text->scene, (char *)ev.data.scalar.value);
             } else if (!strcmp((char *)event.data.scalar.value, "text")) {
-                text->text = malloc(sizeof(char) * (strlen((char *)ev.data.scalar.value) + 1));
-                strcpy(text->text, (char *)ev.data.scalar.value);
+                text->text = calloc((utf8_strlen(ev.data.scalar.value)) + 1, sizeof(unsigned int));
+                utf8to32_strcpy(text->text, (char *)ev.data.scalar.value);
             } else if (!strcmp((char *)event.data.scalar.value, "font")) {
                 text->font = malloc(sizeof(char) * (strlen((char *)ev.data.scalar.value) + 1));
                 strcpy(text->font, (char *)ev.data.scalar.value);
-- 
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