From b46dccb70d633c2fb07755d070c3bb603b4c7e06 Mon Sep 17 00:00:00 2001
From: Danila Fedorin <danila.fedorin@gmail.com>
Date: Sat, 10 Feb 2018 16:01:01 -0800
Subject: [PATCH] Add a utility header to convert error codes.

---
 CMakeLists.txt           |  2 +-
 include/libabacus.h      |  4 +++-
 include/libabacus_util.h | 21 +++++++++++++++++++++
 src/libabacus_util.c     | 20 ++++++++++++++++++++
 4 files changed, 45 insertions(+), 2 deletions(-)
 create mode 100644 include/libabacus_util.h
 create mode 100644 src/libabacus_util.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8fe7bdd..2b94868 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@ project(libabacus)
 
 add_compile_options(-pedantic -Wall)
 
-add_library(abacus STATIC src/lexer.c)
+add_library(abacus STATIC src/lexer.c src/libabacus_util.c)
 add_executable(libabacus src/main.c)
 add_subdirectory(external/liblex)
 
diff --git a/include/libabacus.h b/include/libabacus.h
index e74312d..fca344f 100644
--- a/include/libabacus.h
+++ b/include/libabacus.h
@@ -7,7 +7,9 @@
  */
 enum libab_result {
     LIBAB_SUCCESS,
-    LIBAB_MALLOC
+    LIBAB_MALLOC,
+    LIBAB_BAD_PATTERN,
+    LIBAB_FAILED_MATCH
 };
 
 typedef enum libab_result libab_result;
diff --git a/include/libabacus_util.h b/include/libabacus_util.h
new file mode 100644
index 0000000..e688280
--- /dev/null
+++ b/include/libabacus_util.h
@@ -0,0 +1,21 @@
+#ifndef LIBABACUS_UTIL_H
+#define LIBABACUS_UTIL_H
+
+#include "libds.h"
+#include "liblex.h"
+#include "libabacus.h"
+
+/**
+ * Converts a result code from liblex to libabacus.
+ * @param to_convert the code to convert.
+ * @return the libabacus equivalent of the error code.
+ */
+libab_result convert_lex_result(liblex_result to_convert);
+/**
+ * Converts a result code from libds to libabacus.
+ * @param to_convert the code to convert.
+ * @return the libabacus equivalent of the error code.
+ */
+libab_result convert_ds_result(libds_result to_convert);
+
+#endif
diff --git a/src/libabacus_util.c b/src/libabacus_util.c
new file mode 100644
index 0000000..9334aab
--- /dev/null
+++ b/src/libabacus_util.c
@@ -0,0 +1,20 @@
+#include "libabacus_util.h"
+
+libab_result convert_lex_result(liblex_result to_convert) {
+    libab_result result = LIBAB_SUCCESS;
+    if(to_convert == LIBLEX_MALLOC) {
+        result = LIBAB_MALLOC;
+    } else if(to_convert == LIBLEX_INVALID) {
+        result = LIBAB_BAD_PATTERN;
+    } else if(to_convert == LIBLEX_UNRECOGNIZED) {
+        result = LIBAB_FAILED_MATCH;
+    }
+    return result;
+}
+libab_result convert_ds_result(libds_result to_convert) {
+    libab_result result = LIBAB_SUCCESS;
+    if(to_convert == LIBDS_MALLOC) {
+        result = LIBAB_MALLOC;
+    }
+    return result;
+}