[MOD/WIP] Mess a bit with the XEP-0393 parser

It took a comical amount of time for me to do that LMAO

src/StrSplit.c

@@ -1,9 +1,13 @@
 #include <StringSplit.h>
 
 #include <Cytoplasm/Memory.h>
+#include <Cytoplasm/Str.h>
+#include <Cytoplasm/Log.h>
+
 #include <stdbool.h>
 #include <string.h>
 #include <stdlib.h>
+#include <ctype.h>
 
 char **
 StrSplitLines(char *text)
@@ -109,3 +113,131 @@ StrFullRect(char **split)
         .source_lines = split
     });
 }
+
+char
+StrGet(StringRect rect, int line, int col)
+{
+    int actual_line, actual_col;
+    char *linep;
+    if (!rect.source_lines)
+    {
+        return '\0';
+    }
+
+    actual_line = rect.start_line + line;
+    actual_col  = rect.start_char + col;
+
+    if (actual_line > rect.end_line)
+    {
+        return '\0';
+    }
+
+    if (!(linep = rect.source_lines[actual_line]))
+    {
+        return '\0';
+    }
+    if (actual_col > strlen(linep))
+    {
+        return '\0';
+    }
+
+    return linep[actual_col];
+}
+size_t
+StrViewChars(StringRect rect, int line)
+{
+    int actual_line;
+    char *linep;
+    if (!rect.source_lines)
+    {
+        return 0;
+    }
+
+    actual_line = rect.start_line + line;
+
+    if (actual_line > rect.end_line)
+    {
+        return 0;
+    }
+
+    if (!(linep = rect.source_lines[actual_line]))
+    {
+        return 0;
+    }
+    return rect.end_char - rect.start_char;
+}
+
+StringRect
+StrGetl(StringRect rect, int line, bool extend)
+{
+    int actual_line;
+    if (!rect.source_lines)
+    {
+        return StrFullRect(NULL);
+    }
+
+    actual_line = rect.start_line + line;
+
+    if (actual_line > rect.end_line)
+    {
+        return StrFullRect(NULL);
+    }
+
+    rect.start_line = actual_line;
+    if (!extend)
+    {
+        rect.end_line = actual_line;
+    }
+    return rect;
+}
+StringRect
+StrShift(StringRect rect, int n)
+{
+    int new = rect.start_char + n;
+    if (new > rect.end_char)
+    {
+        new = rect.end_char;
+    }
+    rect.start_char = new;
+
+    return rect;
+}
+
+size_t
+StrViewLines(StringRect view)
+{
+    if (view.start_line > view.end_line)
+    {
+        return 0;
+    }
+
+    return view.end_line - view.start_line + 1;
+}
+
+void
+PrintRect(StringRect rect)
+{
+    size_t i;
+    if (!rect.source_lines)
+    {
+        return;
+    }
+
+    for (i = 0; i < StrViewLines(rect); i++)
+    {
+        char *line = NULL, *tmp;
+        char cbuf[2] = { 0, '\0' };
+        size_t chi = 0;
+        
+        while ((*cbuf = StrGet(rect, i, chi)) != '\0' && 
+               chi++ <= StrViewChars(rect, i))
+        {
+            tmp = line;
+            line = StrConcat(2, line, cbuf);
+            Free(tmp);
+        }
+
+        Log(LOG_INFO, line);
+        Free(line);
+    }
+}