Add non-locale aware CPLTolower() and CPLToupper()

rouault · Apr 14, 2024 · 19b0302 · 19b0302
1 parent 7598191
commit 19b0302
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Showing 2 changed files with 33 additions and 0 deletions.
diff --git a/port/cpl_string.cpp b/port/cpl_string.cpp
@@ -3021,3 +3021,33 @@ char **CSLParseCommandLine(const char *pszCommandLine)
 {
     return CSLTokenizeString(pszCommandLine);
 }
+
+/************************************************************************/
+/*                              CPLToupper()                            */
+/************************************************************************/
+
+/** Converts a (ASCII) lowercase character to uppercase.
+ *
+ * Same as standard toupper(), except that it is not locale sensitive.
+ *
+ * @since GDAL 3.9
+ */
+int CPLToupper(int c)
+{
+    return (c >= 'a' && c <= 'z') ? (c - 'a' + 'A') : c;
+}
+
+/************************************************************************/
+/*                              CPLTolower()                            */
+/************************************************************************/
+
+/** Converts a (ASCII) uppercase character to lowercase.
+ *
+ * Same as standard tolower(), except that it is not locale sensitive.
+ *
+ * @since GDAL 3.9
+ */
+int CPLTolower(int c)
+{
+    return (c >= 'A' && c <= 'Z') ? (c - 'A' + 'a') : c;
+}
diff --git a/port/cpl_string.h b/port/cpl_string.h
@@ -190,6 +190,9 @@ typedef enum
 
 CPLValueType CPL_DLL CPLGetValueType(const char *pszValue);
 
+int CPL_DLL CPLToupper(int c);
+int CPL_DLL CPLTolower(int c);
+
 size_t CPL_DLL CPLStrlcpy(char *pszDest, const char *pszSrc, size_t nDestSize);
 size_t CPL_DLL CPLStrlcat(char *pszDest, const char *pszSrc, size_t nDestSize);
 size_t CPL_DLL CPLStrnlen(const char *pszStr, size_t nMaxLen);