From a877fc24fbd7371994aea44567075962cf83b1c5 Mon Sep 17 00:00:00 2001
From: twinaphex <libretro@gmail.com>
Date: Wed, 8 Jun 2016 19:12:23 +0200
Subject: [PATCH] (libretro-common/stdstring) Add
 string_trim_whitespace_left/string_trim_whitespace_right

---
 libretro-common/include/string/stdstring.h |  6 +++
 libretro-common/string/stdstring.c         | 50 ++++++++++++++++++++++
 2 files changed, 56 insertions(+)

diff --git a/libretro-common/include/string/stdstring.h b/libretro-common/include/string/stdstring.h
index 604d66d488..e483435fb5 100644
--- a/libretro-common/include/string/stdstring.h
+++ b/libretro-common/include/string/stdstring.h
@@ -47,6 +47,12 @@ char *string_ucwords(char* s);
 char *string_replace_substring(const char *in, const char *pattern,
       const char *by);
 
+/* Remove whitespace from beginning of string */
+void string_trim_whitespace_left(char *string);
+
+/* Remove whitespace from end of string */
+void string_trim_whitespace_right(char *string);
+
 RETRO_END_DECLS
 
 #endif
diff --git a/libretro-common/string/stdstring.c b/libretro-common/string/stdstring.c
index 3ea2b4b812..3c59c6196b 100644
--- a/libretro-common/string/stdstring.c
+++ b/libretro-common/string/stdstring.c
@@ -117,3 +117,53 @@ char *string_replace_substring(const char *in,
    
    return out;
 }
+
+/* Remove whitespace from beginning of string */
+void string_trim_whitespace_left(char *string)
+{
+   bool in_whitespace  = true;
+   int32_t si          = 0;;
+   int32_t di          = 0;
+
+   while(string[si])
+   {
+      bool test = in_whitespace && 
+            (string[si] == ' '  || 
+             string[si] == '\r' || 
+             string[si] == '\n' || 
+             string[si] == '\t' || 
+             string[si] == 0x0b);
+
+      if(!test)
+      {
+         in_whitespace = false;
+         string[di]    = string[si];
+         di++;
+      }
+
+      si++;
+   }
+   string[di] = 0;
+}
+
+/* Remove whitespace from end of string */
+void string_trim_whitespace_right(char *string)
+{
+   int32_t len = strlen(string);
+
+   if(len)
+   {
+      int32_t x;
+      for(x = len - 1; x >= 0; x--)
+      {
+         bool test = string[x] == ' '  || string[x] == '\r' 
+            || string[x] == '\n' || string[x] == '\t' 
+            || string[x] == 0x0b;
+
+         if (!test)
+            break;
+
+         string[x] = 0;
+      }
+   }
+}