From db0d4048b30f61ecdb1b4ca2626efd500002c2e6 Mon Sep 17 00:00:00 2001
From: omicronrex <65692652+omicronrex@users.noreply.github.com>
Date: Wed, 28 Feb 2024 16:36:03 -0300
Subject: [PATCH] string_trim()

---
 gm82core.gej       | 59 ++++++++++++++++++++++++++--------------------
 source/strings.gml | 38 +++++++++++++++++++++++++++++
 2 files changed, 72 insertions(+), 25 deletions(-)

diff --git a/gm82core.gej b/gm82core.gej
index f5b4a98..cb2689f 100644
--- a/gm82core.gej
+++ b/gm82core.gej
@@ -3,7 +3,7 @@
 	"folder": "gm82",
 	"version": "1.6",
 	"author": "renex, Floogle, Lovey01, cam900, Adamcake, YellowAfterlife, Verve",
-	"date": "07/02/2024",
+	"date": "28/02/2024",
 	"license": "Free to use, also for commercial games.",
 	"description": "Part of the standard Game Maker 8.2 distribution. This extension package contains a number of helper functions that are commonly used, and also geometry functions introduced in GM:Studio. This extension is also required for using the other GM 8.2 extensions, Sound and Joystick.",
 	"helpfile": "",
@@ -2053,6 +2053,30 @@
 					],
 					"returntype": 2
 				},
+				{
+					"name": "string_copy_end",
+					"extname": "",
+					"calltype": 2,
+					"helpline": "string_copy_end(string,count)",
+					"hidden": false,
+					"argtypes": [
+						2,
+						2
+					],
+					"returntype": 2
+				},
+				{
+					"name": "string_delete_end",
+					"extname": "",
+					"calltype": 2,
+					"helpline": "string_delete_end(string,count)",
+					"hidden": false,
+					"argtypes": [
+						2,
+						2
+					],
+					"returntype": 2
+				},
 				{
 					"name": "string_ends_with",
 					"extname": "",
@@ -2123,6 +2147,15 @@
 					],
 					"returntype": 2
 				},
+				{
+					"name": "string_trim",
+					"extname": "",
+					"calltype": 2,
+					"helpline": "string_trim(string,[trim1,trim2...])",
+					"hidden": false,
+					"argtypes": null,
+					"returntype": 2
+				},
 				{
 					"name": "strong",
 					"extname": "str_cat",
@@ -2158,30 +2191,6 @@
 					"hidden": false,
 					"argtypes": null,
 					"returntype": 2
-				},
-				{
-					"name": "string_delete_end",
-					"extname": "",
-					"calltype": 2,
-					"helpline": "string_delete_end(string,count)",
-					"hidden": false,
-					"argtypes": [
-						2,
-						2
-					],
-					"returntype": 2
-				},
-				{
-					"name": "string_copy_end",
-					"extname": "",
-					"calltype": 2,
-					"helpline": "string_copy_end(string,count)",
-					"hidden": false,
-					"argtypes": [
-						2,
-						2
-					],
-					"returntype": 2
 				}
 			],
 			"constants": []
diff --git a/source/strings.gml b/source/strings.gml
index c3eadb6..b313809 100644
--- a/source/strings.gml
+++ b/source/strings.gml
@@ -178,5 +178,43 @@
     //returns: copy from provided string
 
     return string_copy(argument0, max(string_length(argument0) - argument1 + 1, 1), argument1);
+
+
+#define string_trim
+    ///string_trim(string,[trim1,trim2...])
+    //string: string to process
+    //arguments: strings to trim out
+    //returns: trimmed string
+    //This function will remove occurrences of the trims from the edges of a string.
+    //If no extra arguments are specified, spaces are removed instead.
+    
+    var __i,__p1,__p2,__str,__trim,__trimlen;
+        
+    __str=argument[0]
+    __i=1
+        
+    if (argument_count==1) {     
+        __j=string_length(__str)
+        
+        while (string_char_at(__str,__i)==" " && __i<__j) __i+=1
+        while (string_char_at(__str,__j)==" " && __j>0) __j-=1
+        
+        return string_copy(__str,__i,__j-__i+1)
+    }
+
+    repeat (argument_count-1) {
+        __trim=argument[__i]
+        
+        __trimlen=string_length(__trim)
+        while (string_copy(__str,1,__trimlen)==__trim) {
+            __str=string_delete(__str,1,__trimlen)
+        }
+        
+        while (string_copy(__str,string_length(__str)+1-__trimlen,__trimlen)==__trim) {
+            __str=string_delete(__str,string_length(__str)+1-__trimlen,__trimlen)
+        }
+    __i+=1}
+
+    return __str
 //
 //
\ No newline at end of file