Implement dynstr_cmp.

1 files changed, 22 insertions, 0 deletions

diff --git a/dynstr.c b/dynstr.c
index b3d4cbd..4805b45 100644
--- a/dynstr.c
+++ b/dynstr.c
@@ -267,6 +267,28 @@ size_t dynstr_last_string(Dynstr *dynstr, size_t offset, Dynstr *pattern)
 }
 
 
+int dynstr_cmp(Dynstr *dynstr1, Dynstr *dynstr2)
+{
+    int result;
+    size_t min_size;
+
+    if (dynstr1->size < dynstr2->size)
+        min_size = dynstr1->size;
+    else
+        min_size = dynstr2->size;
+    result = memcmp(dynstr1->mem, dynstr2->mem, min_size);
+    if (result == 0) {
+        if (dynstr1->size < dynstr2->size)
+            return -1;
+        else if (dynstr1->size == dynstr2->size)
+            return 0;
+        else
+            return 1;
+    }
+    return result;
+}
+
+
 size_t dynstr_fwrite(FILE *file, Dynstr *dynstr)
 {
     return fwrite(dynstr->mem, 1, dynstr->size, file);