From 4466ab96255e3b720a96cf6dd05cdaeef5119691 Mon Sep 17 00:00:00 2001
From: Alessandro Iezzi <aiezzi@alessandroiezzi.it>
Date: Wed, 24 Jul 2024 12:33:06 +0200
Subject: Add string utils

---
 Makefile       |  5 ++++-
 utils/string.c | 24 ++++++++++++++++++++++++
 utils/string.h |  9 +++++++++
 3 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 utils/string.c
 create mode 100644 utils/string.h

diff --git a/Makefile b/Makefile
index de0f79f..75a30d5 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ LEX  = lex
 YACC = yacc
 CC   = cc
 
-OBJ = properties-parser.o properties-lexer.o
+OBJ = utils/string.o properties-parser.o properties-lexer.o
 
 CFLAGS = -DVERSION=${VER}
 LFLAGS = -ll -ly
@@ -23,6 +23,9 @@ properties-parser.o properties-parser.h: properties.y
 	@mv y.tab.h properties-parser.h
 	${CC} ${CFLAGS} -c properties-parser.c
 
+utils/string.o: utils/string.c
+	${CC} ${CFLAGS} -c $< -o $@
+
 properties: ${OBJ}
 	${CC} ${OBJ} -o $@ ${LFLAGS}
 
diff --git a/utils/string.c b/utils/string.c
new file mode 100644
index 0000000..1975306
--- /dev/null
+++ b/utils/string.c
@@ -0,0 +1,24 @@
+#include <ctype.h>
+#include <string.h>
+
+char *
+ltrim(char *s)
+{
+    while(isspace(*s)) s++;
+    return s;
+}
+
+char *
+rtrim(char *s)
+{
+    char* back = s + strlen(s);
+    while(isspace(*--back));
+    *(back+1) = '\0';
+    return s;
+}
+
+char *
+trim(char *s)
+{
+    return rtrim(ltrim(s));
+}
\ No newline at end of file
diff --git a/utils/string.h b/utils/string.h
new file mode 100644
index 0000000..a4782cb
--- /dev/null
+++ b/utils/string.h
@@ -0,0 +1,9 @@
+#ifndef __UTILS_STRING_H__
+#define __UTILS_STRING_H__
+#include <string.h>
+
+char *ltrim(char *);
+char *rtrim(char *);
+char *trim(char *);
+
+#endif /* __UTILS_STRING_H__ */
-- 
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