OcStringLib: Add OcAsciiStrChr and OcAsciiStrrChr API

Include/Acidanthera/Library/OcStringLib.h

@@ -255,9 +255,7 @@ OcStrniCmp (
   the length of SearchString is zero, then String is returned.
 
   If String is NULL, then ASSERT().
-  If String is not aligned on a 8-bit boundary, then ASSERT().
   If SearchString is NULL, then ASSERT().
-  If SearchString is not aligned on a 8-bit boundary, then ASSERT().
 
   If PcdMaximumAsciiStringLength is not zero, and SearchString
   or String contains more than PcdMaximumAsciiStringLength ASCII
@@ -277,6 +275,52 @@ OcAsciiStriStr (
   IN      CONST CHAR8              *SearchString
   );
 
+/**
+  Returns a pointer to the first occurrence of Char
+  in a Null-terminated ASCII string.
+
+  If String is NULL, then ASSERT().
+
+  If PcdMaximumAsciiStringLength is not zero, and String
+  contains more than PcdMaximumAsciiStringLength ASCII
+  characters, not including the Null-terminator, then ASSERT().
+
+  @param  String          The pointer to a Null-terminated ASCII string.
+  @param  Char            Character to be located.
+
+  @return                 A pointer to the first occurrence of Char in String.
+  @retval NULL            If Char cannot be found in String.
+**/
+CHAR8 *
+EFIAPI
+OcAsciiStrChr (
+  IN      CONST CHAR8              *String,
+  IN            CHAR8              Char
+  );
+
+/**
+  Returns a pointer to the last occurrence of Char
+  in a Null-terminated ASCII string.
+
+  If String is NULL, then ASSERT().
+
+  If PcdMaximumAsciiStringLength is not zero, and String
+  contains more than PcdMaximumAsciiStringLength ASCII
+  characters, not including the Null-terminator, then ASSERT().
+
+  @param  String          The pointer to a Null-terminated ASCII string.
+  @param  Char            Character to be located.
+
+  @return                 A pointer to the last occurrence of Char in String.
+  @retval NULL            If Char cannot be found in String.
+**/
+CHAR8 *
+EFIAPI
+OcAsciiStrrChr (
+  IN      CONST CHAR8              *String,
+  IN            CHAR8              Char
+  );
+
 /**
   Returns the first occurrence of a Null-terminated Unicode sub-string
   in a Null-terminated Unicode string through a case insensitive comparison.

Library/OcStringLib/OcAsciiLib.c

@@ -262,3 +262,53 @@ OcAsciiStriStr (
 
   return NULL;
 }
+
+CHAR8 *
+EFIAPI
+OcAsciiStrChr (
+  IN      CONST CHAR8              *String,
+  IN            CHAR8              Char
+  )
+{
+  ASSERT (AsciiStrSize (String) != 0);
+
+  while (*String != '\0') {
+    //
+    // Return immediately when matching first occurrence of Char.
+    //
+    if (*String == Char) {
+      return (CHAR8 *) String;
+    }
+
+    ++String;
+  }
+
+  return NULL;
+}
+
+CHAR8 *
+EFIAPI
+OcAsciiStrrChr (
+  IN      CONST CHAR8              *String,
+  IN            CHAR8              Char
+  )
+{
+  CHAR8 *Save;
+
+  ASSERT (AsciiStrSize (String) != 0);
+
+  Save = NULL;
+
+  while (*String != '\0') {
+    //
+    // Record the last occurrence of Char.
+    //
+    if (*String == Char) {
+      Save = (CHAR8 *) String;
+    }
+
+    ++String;
+  }
+
+  return Save;
+}