From c75e4c25e837b6d6605c77f660fa236e89f634a0 Mon Sep 17 00:00:00 2001
From: Yann Collet <yann.collet.73@gmail.com>
Date: Tue, 10 May 2016 17:47:11 +0200
Subject: [PATCH] Added : ZSTD_getErrorString(), to get error string from error
 enum (#168)

---
 lib/common/error_private.h | 12 ++++++++----
 lib/common/zstd_common.c   |  6 +++++-
 lib/common/zstd_static.h   |  3 ++-
 3 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/lib/common/error_private.h b/lib/common/error_private.h
index 7bd03065b..3f039ae67 100644
--- a/lib/common/error_private.h
+++ b/lib/common/error_private.h
@@ -78,17 +78,17 @@ typedef ZSTD_ErrorCode ERR_enum;
 
 ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); }
 
-ERR_STATIC ERR_enum ERR_getError(size_t code) { if (!ERR_isError(code)) return (ERR_enum)0; return (ERR_enum) (0-code); }
+ERR_STATIC ERR_enum ERR_getErrorCode(size_t code) { if (!ERR_isError(code)) return (ERR_enum)0; return (ERR_enum) (0-code); }
 
 
 /*-****************************************
 *  Error Strings
 ******************************************/
 
-ERR_STATIC const char* ERR_getErrorName(size_t code)
+ERR_STATIC const char* ERR_getErrorString(ERR_enum code)
 {
     static const char* notErrorCode = "Unspecified error code";
-    switch( ERR_getError(code) )
+    switch( code )
     {
     case PREFIX(no_error): return "No error detected";
     case PREFIX(GENERIC):  return "Error (generic)";
@@ -107,10 +107,14 @@ ERR_STATIC const char* ERR_getErrorName(size_t code)
     case PREFIX(maxSymbolValue_tooSmall): return "Specified maxSymbolValue is too small";
     case PREFIX(dictionary_corrupted): return "Dictionary is corrupted";
     case PREFIX(maxCode):
-    default: return notErrorCode;   /* impossible, due to ERR_getError() */
+    default: return notErrorCode;
     }
 }
 
+ERR_STATIC const char* ERR_getErrorName(size_t code)
+{
+    return ERR_getErrorString(ERR_getErrorCode(code));
+}
 
 #if defined (__cplusplus)
 }
diff --git a/lib/common/zstd_common.c b/lib/common/zstd_common.c
index 679e3ace6..9915da759 100644
--- a/lib/common/zstd_common.c
+++ b/lib/common/zstd_common.c
@@ -52,12 +52,16 @@ unsigned ZSTD_isError(size_t code) { return ERR_isError(code); }
 
 /*! ZSTD_getError() :
 *   convert a `size_t` function result into a proper ZSTD_errorCode enum */
-ZSTD_ErrorCode ZSTD_getError(size_t code) { return ERR_getError(code); }
+ZSTD_ErrorCode ZSTD_getErrorCode(size_t code) { return ERR_getErrorCode(code); }
 
 /*! ZSTD_getErrorName() :
 *   provides error code string (useful for debugging) */
 const char* ZSTD_getErrorName(size_t code) { return ERR_getErrorName(code); }
 
+/*! ZSTD_getErrorName() :
+*   provides error code string (useful for debugging) */
+const char* ZSTD_getErrorString(ZSTD_ErrorCode code) { return ERR_getErrorName(code); }
+
 
 /*-****************************************
 *  FSE Error Management
diff --git a/lib/common/zstd_static.h b/lib/common/zstd_static.h
index 0ec5b635c..ef42b0a97 100644
--- a/lib/common/zstd_static.h
+++ b/lib/common/zstd_static.h
@@ -261,7 +261,8 @@ ZSTDLIB_API size_t ZSTD_decompressBlock(ZSTD_DCtx* dctx, void* dst, size_t dstCa
 /*! ZSTD_getErrorCode() :
     convert a `size_t` function result into a `ZSTD_ErrorCode` enum type,
     which can be used to compare directly with enum list published into "error_public.h" */
-ZSTDLIB_API ZSTD_ErrorCode ZSTD_getError(size_t code);
+ZSTDLIB_API ZSTD_ErrorCode ZSTD_getErrorCode(size_t functionResult);
+ZSTDLIB_API const char* ZSTD_getErrorString(ZSTD_ErrorCode code);
 
 
 #if defined (__cplusplus)
-- 
2.47.2