# HG changeset patch
# User Olaf Wintermann <olaf.wintermann@gmail.com>
# Date 1405338662 -7200
# Node ID 2185f19dcc45b45f0f70550059ddc6952845fd8e
# Parent  ee25d79a4187b45ee29e2ecb7bce36a00538bcd1
added new sstrcat

diff -r ee25d79a4187 -r 2185f19dcc45 test/main.c
--- a/test/main.c	Mon Jul 14 12:45:48 2014 +0200
+++ b/test/main.c	Mon Jul 14 13:51:02 2014 +0200
@@ -121,6 +121,7 @@
         ucx_test_register(suite, test_sstr_len);
         ucx_test_register(suite, test_sstrcmp);
         ucx_test_register(suite, test_sstrcasecmp);
+        ucx_test_register(suite, test_sstrcat);
         ucx_test_register(suite, test_sstrchr_sstrrchr);
         ucx_test_register(suite, test_sstrsplit);
         ucx_test_register(suite, test_sstrtrim);
diff -r ee25d79a4187 -r 2185f19dcc45 test/string_tests.c
--- a/test/string_tests.c	Mon Jul 14 12:45:48 2014 +0200
+++ b/test/string_tests.c	Mon Jul 14 13:51:02 2014 +0200
@@ -54,6 +54,7 @@
     UCX_TEST_END
 }
 
+
 UCX_TEST(test_sstrchr_sstrrchr) {
     sstr_t str = ST("I will find you - and I will kill you");
     UCX_TEST_BEGIN
@@ -100,6 +101,37 @@
     UCX_TEST_END
 }
 
+
+UCX_TEST(test_sstrcat) {
+    sstr_t s1 = S("12");
+    sstr_t s2 = S("34");
+    sstr_t s3 = S("56");
+    sstr_t sn = { NULL, 0 };
+    
+    UCX_TEST_BEGIN
+    
+    sstr_t t1 = sstrcat(2, s1, s2);
+    UCX_TEST_ASSERT(!sstrcmp(t1, S("1234")), "t1: wrong content");
+    free(t1.ptr);
+    
+    sstr_t t2 = sstrcat(3, s1, s2, s3);
+    UCX_TEST_ASSERT(!sstrcmp(t2, S("123456")), "t2: wrong content");
+    free(t2.ptr);
+    
+    sstr_t t3 = sstrcat(6, s1, sn, s2, sn, s3, sn);
+    UCX_TEST_ASSERT(!sstrcmp(t3, S("123456")), "t3: wrong content");
+    free(t3.ptr);
+    
+    sstr_t t4 = sstrcat(2, sn, sn);
+    UCX_TEST_ASSERT(t4.ptr, "t4.ptr is NULL");
+    UCX_TEST_ASSERT(t4.length == 0, "t4 has wrong length");
+    free(t4.ptr);
+    
+            
+    UCX_TEST_END
+    
+}
+
 UCX_TEST(test_sstrsplit) {
 
     const char *original = "this,is,a,csv,string";
diff -r ee25d79a4187 -r 2185f19dcc45 test/string_tests.h
--- a/test/string_tests.h	Mon Jul 14 12:45:48 2014 +0200
+++ b/test/string_tests.h	Mon Jul 14 13:51:02 2014 +0200
@@ -40,6 +40,7 @@
 UCX_TEST(test_sstr_len);
 UCX_TEST(test_sstrcmp);
 UCX_TEST(test_sstrcasecmp);
+UCX_TEST(test_sstrcat);
 UCX_TEST(test_sstrchr_sstrrchr);
 UCX_TEST(test_sstrsplit);
 UCX_TEST(test_sstrtrim);
diff -r ee25d79a4187 -r 2185f19dcc45 ucx/string.c
--- a/ucx/string.c	Mon Jul 14 12:45:48 2014 +0200
+++ b/ucx/string.c	Mon Jul 14 13:51:02 2014 +0200
@@ -61,6 +61,74 @@
     return size;
 }
 
+static sstr_t sstrvcat_a(
+        UcxAllocator *a,
+        size_t count,
+        sstr_t s1,
+        sstr_t s2,
+        va_list ap) {
+    sstr_t str;
+    str.ptr = NULL;
+    str.length = 0;
+    if(count < 2) {
+        return str;
+    }
+    
+    sstr_t *strings = calloc(count, sizeof(sstr_t));
+    if(!strings) {
+        return str;
+    }
+    
+    // get all args and overall length
+    strings[0] = s1;
+    strings[1] = s2;
+    size_t strlen = s1.length + s2.length;
+    for (size_t i=2;i<count;i++) {
+        sstr_t s = va_arg (ap, sstr_t);
+        strings[i] = s;
+        strlen += s.length;
+    }
+    
+    // create new string
+    str.ptr = malloc(strlen + 1);
+    str.length = strlen;
+    if(!str.ptr) {
+        free(strings);
+        str.length = 0;
+        return str;
+    }
+    
+    // concatenate strings
+    size_t pos = 0;
+    for (size_t i=0;i<count;i++) {
+        sstr_t s = strings[i];
+        memcpy(str.ptr + pos, s.ptr, s.length);
+        pos += s.length;
+    }
+    
+    str.ptr[str.length] = '\0';
+    
+    free(strings);
+    
+    return str;
+}
+
+sstr_t sstrcat(size_t count, sstr_t s1, sstr_t s2, ...) {
+    va_list ap;
+    va_start(ap, s2);
+    sstr_t s = sstrvcat_a(ucx_default_allocator(), count, s1, s2, ap);
+    va_end(ap);
+    return s;
+}
+
+sstr_t sstrcat_a(UcxAllocator *a, size_t count, sstr_t s1, sstr_t s2, ...) {
+    va_list ap;
+    va_start(ap, s2);
+    sstr_t s = sstrvcat_a(a, count, s1, s2, ap);
+    va_end(ap);
+    return s;
+}
+
 sstr_t sstrsubs(sstr_t s, size_t start) {
     return sstrsubsl (s, start, s.length-start);
 }
diff -r ee25d79a4187 -r 2185f19dcc45 ucx/string.h
--- a/ucx/string.h	Mon Jul 14 12:45:48 2014 +0200
+++ b/ucx/string.h	Mon Jul 14 13:51:02 2014 +0200
@@ -120,6 +120,17 @@
 size_t sstrnlen(size_t count, sstr_t string, ...);
 
 /**
+ * Concatenates strings.
+ *
+ * @param count   the total number of strings to concatenate
+ * @param ...     all strings
+ * @return the concatenated string
+ */
+sstr_t sstrcat(size_t count, sstr_t s1, sstr_t s2, ...);
+sstr_t sstrcat_a(UcxAllocator *a, size_t count, sstr_t s1, sstr_t s2, ...);
+
+
+/**
  * Returns a substring starting at the specified location.
  * 
  * <b>Attention:</b> the new string references the same memory area as the