From 55ddc29c770241ad0d96276edd0833ddc63aa793 Mon Sep 17 00:00:00 2001
From: "Fletcher T. Penney" <fletcher@fletcherpenney.net>
Date: Thu, 19 Jan 2017 13:43:32 -0500
Subject: [PATCH] ADDED: Basic localization configuration

---
 CMakeLists.txt     |   3 ++
 src/html.c         |   4 +-
 src/localization.h | 114 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 118 insertions(+), 3 deletions(-)
 create mode 100644 src/localization.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 19d6bcb..c37b336 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -44,6 +44,9 @@ include_directories( ${PROJECT_SOURCE_DIR}/src )
 include_directories( ${PROJECT_SOURCE_DIR}/test )
 include_directories(${PROJECT_BINARY_DIR})
 
+# Default is 256 -- needed for localization hash function
+add_definitions("-fbracket-depth=264")	
+
 
 # =================
 # Macro Definitions
diff --git a/src/html.c b/src/html.c
index 431c119..57d4dfe 100644
--- a/src/html.c
+++ b/src/html.c
@@ -60,15 +60,13 @@
 #include "d_string.h"
 #include "html.h"
 #include "libMultiMarkdown.h"
+#include "localization.h"
 #include "parser.h"
 #include "token.h"
 #include "scanners.h"
 #include "writer.h"
 
 
-#define LC(x) x
-
-
 #define print(x) d_string_append(out, x)
 #define print_char(x) d_string_append_c(out, x)
 #define printf(...) d_string_append_printf(out, __VA_ARGS__)
diff --git a/src/localization.h b/src/localization.h
new file mode 100644
index 0000000..3c23324
--- /dev/null
+++ b/src/localization.h
@@ -0,0 +1,114 @@
+/**
+
+	MultiMarkdown 6 -- MultiMarkdown - lightweight markup processor.
+
+	@file localization.h
+
+	@brief 
+
+
+	@author	Fletcher T. Penney
+	@bug	
+
+**/
+
+/*
+
+	Copyright © 2016 - 2017 Fletcher T. Penney.
+
+
+	
+
+*/
+
+
+#ifndef LOCALIZATION_MULTIMARKDOWN_6_H
+#define LOCALIZATION_MULTIMARKDOWN_6_H
+
+
+#include <string.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+
+#define kNumberOfLanguages 4
+#define kNumberOfStrings 3
+#define kLanguage 0
+
+//#define LOCALIZATION_DISABLED
+
+
+// Hash function from http://lolengine.net/blog/2011/12/20/cpp-constant-string-hash
+// via http://stackoverflow.com/questions/2826559/compile-time-preprocessor-hashing-of-string
+
+
+#ifdef LOCALIZATION_DISABLED
+	#define LC(x) x
+#else
+	#define H1(s,i,x)   (x*65599u+(uint8_t)s[(i)<strlen(s)?strlen(s)-1-(i):strlen(s)])
+	#define H4(s,i,x)   H1(s,i,H1(s,i+1,H1(s,i+2,H1(s,i+3,x))))
+	#define H16(s,i,x)  H4(s,i,H4(s,i+4,H4(s,i+8,H4(s,i+12,x))))
+	#define H64(s,i,x)  H16(s,i,H16(s,i+16,H16(s,i+32,H16(s,i+48,x))))
+	#define H256(s,i,x) H64(s,i,H64(s,i+64,H64(s,i+128,H64(s,i+192,x))))
+
+	#define HASH(s)    ((uint32_t)(H256(s,0,0)^(H256(s,0,0)>>16)))
+
+	#define LC(x) Translate(HASH(x), kLanguage)
+
+	//#define LC(x) TranslateTest(__COUNTER__, __FILE__, __LINE__, __FUNCTION__ , x)
+
+static const char * lc_lookup[kNumberOfLanguages * kNumberOfStrings] = {
+	"return to body",
+	"return to body",
+	"return to body",
+	"return to le body",
+
+	"see footnote",
+	"see footnote",
+	"see footnote",
+	"Ver nota de pie",
+
+	"see citation",
+	"see citation",
+	"see citation",
+	"ver citation",
+};
+
+
+static inline const char * TranslateTest(int c, char * file, int line, const char func[], char * x) {
+	fprintf(stderr, "%s: %d (%s) -> %d\n", file, line, func, c);
+	unsigned long h = HASH(x);
+	fprintf(stderr, "hash '%s' -> %lu\n", x, h);
+
+	return lc_lookup[(c * kNumberOfLanguages) + kLanguage];
+}
+
+static inline const char * Translate(unsigned long x, int l) {
+	switch (x) {
+		case 3219553713:
+			return lc_lookup[0 * kNumberOfLanguages + l];
+		case 657226305:
+			return lc_lookup[1 * kNumberOfLanguages + l];
+		case 2977473004:
+			return lc_lookup[2 * kNumberOfLanguages + l];
+		default:
+			return "localization error";
+	}
+}
+
+
+// Based on ISO 639-1 names
+// https://en.wikipedia.org/wiki/ISO_639-1
+enum lc_languages {
+	LC_EN = 0,			//!< English is default
+	LC_FR,
+	LC_DE,
+	LC_ES,
+};
+
+
+#endif
+
+#endif
-- 
2.40.0