From: Michael D. Lowis <mike.lowis@gentex.com>
Date: Wed, 20 Aug 2014 12:40:06 +0000 (-0400)
Subject: Implemented substr
X-Git-Url: https://git.mdlowis.com/?a=commitdiff_plain;h=8c0a6eeeff8c6bacfb9e5d08c04b068d1c8d4e10;p=projs%2Flibcds.git

Implemented substr
---

diff --git a/source/string/str.c b/source/string/str.c
index e915b48..0f4bdc8 100644
--- a/source/string/str.c
+++ b/source/string/str.c
@@ -110,10 +110,14 @@ str_t* str_erase(str_t* p_str, size_t start, size_t end)
 
 str_t* str_substr(str_t* p_str, size_t start, size_t end)
 {
-    (void)p_str;
-    (void)start;
-    (void)end;
-    return NULL;
+    str_t* p_newstr = NULL;
+    assert(NULL != p_str);
+    assert(start <= end);
+    p_newstr = (str_t*)mem_allocate(sizeof(str_t) + (end - start) + 1, NULL);
+    p_newstr->size = (end-start);
+    memcpy(p_newstr->data, &(p_str->data[start]), end - start);
+    p_newstr->data[p_newstr->size] = '\0';
+    return p_newstr;
 }
 
 int str_compare(str_t* p_str1, str_t* p_str2)