# HG changeset patch
# User Mike Becker <universe@uap-core.de>
# Date 1526313363 -7200
# Node ID 90b6d69bb4997c2fd1f376655c1896dd8327871f
# Parent  353d71349e619eaea0b2688f597b054c89ecd254# Parent  d1f814633049b9362957ce66ffe961ef74e56d3b
merges constsstr branch

diff -r 353d71349e61 -r 90b6d69bb499 configure.ac
--- a/configure.ac	Mon May 14 15:58:51 2018 +0200
+++ b/configure.ac	Mon May 14 17:56:03 2018 +0200
@@ -27,8 +27,9 @@
 #
 
 # the package version must match the macros in ucx.h
-AC_INIT([ucx], [1.1.0], [olaf.wintermann@gmail.com])
-AC_SUBST([UCX_LIB_VERSION], [2:0:1])
+# the lib version must follow the libtool versioning convention
+AC_INIT([ucx], [2.0.0], [olaf.wintermann@gmail.com])
+AC_SUBST([UCX_LIB_VERSION], [3:0:0])
 
 # don't place everything in the project root
 AC_CONFIG_AUX_DIR([build-aux])
diff -r 353d71349e61 -r 90b6d69bb499 src/string.c
--- a/src/string.c	Mon May 14 15:58:51 2018 +0200
+++ b/src/string.c	Mon May 14 17:56:03 2018 +0200
@@ -50,13 +50,29 @@
     return string;
 }
 
-size_t sstrnlen(size_t n, sstr_t s, ...) {
+scstr_t scstr(const char *cstring) {
+    scstr_t string;
+    string.ptr = cstring;
+    string.length = strlen(cstring);
+    return string;
+}
+
+scstr_t scstrn(const char *cstring, size_t length) {
+    scstr_t string;
+    string.ptr = cstring;
+    string.length = length;
+    return string;
+}
+
+
+size_t ucx_strnlen(size_t n, ...) {
     va_list ap;
-    size_t size = s.length;
-    va_start(ap, s);
+    va_start(ap, n);
+    
+    size_t size = 0;
 
-    for (size_t i = 1 ; i < n ; i++) {
-        sstr_t str = va_arg(ap, sstr_t);
+    for (size_t i = 0 ; i < n ; i++) {
+        scstr_t str = va_arg(ap, scstr_t);
         if(((size_t)-1) - str.length < size) {
             size = 0;
             break;
@@ -71,8 +87,7 @@
 static sstr_t sstrvcat_a(
         UcxAllocator *a,
         size_t count,
-        sstr_t s1,
-        sstr_t s2,
+        scstr_t s1,
         va_list ap) {
     sstr_t str;
     str.ptr = NULL;
@@ -81,11 +96,13 @@
         return str;
     }
     
+    scstr_t s2 = va_arg (ap, scstr_t);
+    
     if(((size_t)-1) - s1.length < s2.length) {
         return str;
     }
     
-    sstr_t *strings = (sstr_t*) calloc(count, sizeof(sstr_t));
+    scstr_t *strings = (scstr_t*) calloc(count, sizeof(scstr_t));
     if(!strings) {
         return str;
     }
@@ -96,7 +113,7 @@
     size_t slen = s1.length + s2.length;
     int error = 0;
     for (size_t i=2;i<count;i++) {
-        sstr_t s = va_arg (ap, sstr_t);
+        scstr_t s = va_arg (ap, scstr_t);
         strings[i] = s;
         if(((size_t)-1) - s.length < slen) {
             error = 1;
@@ -121,7 +138,7 @@
     // concatenate strings
     size_t pos = 0;
     for (size_t i=0;i<count;i++) {
-        sstr_t s = strings[i];
+        scstr_t s = strings[i];
         memcpy(str.ptr + pos, s.ptr, s.length);
         pos += s.length;
     }
@@ -133,65 +150,123 @@
     return str;
 }
 
-sstr_t sstrcat(size_t count, sstr_t s1, sstr_t s2, ...) {
+sstr_t ucx_strcat(size_t count, scstr_t s1, ...) {
     va_list ap;
-    va_start(ap, s2);
-    sstr_t s = sstrvcat_a(ucx_default_allocator(), count, s1, s2, ap);
+    va_start(ap, s1);
+    sstr_t s = sstrvcat_a(ucx_default_allocator(), count, s1, ap);
     va_end(ap);
     return s;
 }
 
-sstr_t sstrcat_a(UcxAllocator *a, size_t count, sstr_t s1, sstr_t s2, ...) {
+sstr_t ucx_strcat_a(UcxAllocator *a, size_t count, scstr_t s1, ...) {
     va_list ap;
-    va_start(ap, s2);
-    sstr_t s = sstrvcat_a(a, count, s1, s2, ap);
+    va_start(ap, s1);
+    sstr_t s = sstrvcat_a(a, count, s1, ap);
     va_end(ap);
     return s;
 }
 
+static int ucx_substring(
+        size_t str_length,
+        size_t start,
+        size_t length,
+        size_t *newlen,
+        size_t *newpos)
+{
+    *newlen = 0;
+    *newpos = 0;
+    
+    if(start > str_length) {
+        return 0;
+    }
+    
+    if(length > str_length - start) {
+        length = str_length - start;
+    }
+    *newlen = length;
+    *newpos = start;
+    return 1;
+}
+
 sstr_t sstrsubs(sstr_t s, size_t start) {
     return sstrsubsl (s, start, s.length-start);
 }
 
 sstr_t sstrsubsl(sstr_t s, size_t start, size_t length) {
-    sstr_t new_sstr;
-    if (start >= s.length) {
-        new_sstr.ptr = NULL;
-        new_sstr.length = 0;
-    } else {
-        if (length > s.length-start) {
-            length = s.length-start;
+    size_t pos;
+    sstr_t ret = { NULL, 0 };
+    if(ucx_substring(s.length, start, length, &ret.length, &pos)) {
+        ret.ptr = s.ptr + pos;
+    }
+    return ret;
+}
+
+scstr_t scstrsubs(scstr_t s, size_t start) {
+    return scstrsubsl (s, start, s.length-start);
+}
+
+scstr_t scstrsubsl(scstr_t s, size_t start, size_t length) {
+    size_t pos;
+    scstr_t ret = { NULL, 0 };
+    if(ucx_substring(s.length, start, length, &ret.length, &pos)) {
+        ret.ptr = s.ptr + pos;
+    }
+    return ret;
+}
+
+
+int ucx_strchr(const char *string, size_t length, int chr, size_t *pos) {
+    for(size_t i=0;i<length;i++) {
+        if(string[i] == chr) {
+            *pos = i;
+            return 1;
         }
-        new_sstr.ptr = &s.ptr[start];
-        new_sstr.length = length;
     }
-    return new_sstr;
+    return 0;
+}
+
+int ucx_strrchr(const char *string, size_t length, int chr, size_t *pos) {
+    if(length > 0) {
+        for(size_t i=length ; i>0 ; i--) {
+            if(string[i-1] == chr) {
+                *pos = i-1;
+                return 1;
+            }
+        }
+    }
+    return 0;
 }
 
 sstr_t sstrchr(sstr_t s, int c) {
-    for(size_t i=0;i<s.length;i++) {
-        if(s.ptr[i] == c) {
-            return sstrsubs(s, i);
-        }
+    size_t pos = 0;
+    if(ucx_strchr(s.ptr, s.length, c, &pos)) {
+        return sstrsubs(s, pos);
     }
-    sstr_t n;
-    n.ptr = NULL;
-    n.length = 0;
-    return n;
+    return sstrn(NULL, 0);
 }
 
 sstr_t sstrrchr(sstr_t s, int c) {
-    if (s.length > 0) {
-        for(size_t i=s.length;i>0;i--) {
-            if(s.ptr[i-1] == c) {
-                return sstrsubs(s, i-1);
-            }
-        }
+    size_t pos = 0;
+    if(ucx_strrchr(s.ptr, s.length, c, &pos)) {
+        return sstrsubs(s, pos);
     }
-    sstr_t n;
-    n.ptr = NULL;
-    n.length = 0;
-    return n;
+    return sstrn(NULL, 0);
+}
+
+scstr_t scstrchr(scstr_t s, int c) {
+    size_t pos = 0;
+    if(ucx_strchr(s.ptr, s.length, c, &pos)) {
+        return scstrsubs(s, pos);
+    }
+    return scstrn(NULL, 0);
+}
+
+scstr_t scstrrchr(scstr_t s, int c) {
+    size_t pos = 0;
+    if(ucx_strrchr(s.ptr, s.length, c, &pos)) {
+        return scstrsubs(s, pos);
+    }
+    return scstrn(NULL, 0);
 }
 
 #define ptable_r(dest, useheap, ptable, index) (dest = useheap ? \
@@ -202,13 +277,21 @@
     else ((size_t*)ptable)[index] = src;\
     } while (0);
 
-sstr_t sstrstr(sstr_t string, sstr_t match) {
-    if (match.length == 0) {
-        return string;
+
+const char* ucx_strstr(
+        const char *str,
+        size_t length,
+        const char *match,
+        size_t matchlen,
+        size_t *newlen)
+{
+    *newlen = length;
+    if (matchlen == 0) {
+        return str;
     }
     
-    /* prepare default return value in case of no match */
-    sstr_t result = sstrn(NULL, 0);
+    const char *result = NULL;
+    size_t resultlen = 0;
     
     /*
      * IMPORTANT:
@@ -223,9 +306,9 @@
     
     /* check pattern length and use appropriate prefix table */
     /* if the pattern exceeds static prefix table, allocate on the heap */
-    register int useheap = match.length > 255;
+    register int useheap = matchlen > 255;
     register void* ptable = useheap ?
-        calloc(match.length+1, sizeof(size_t)): s_prefix_table;
+        calloc(matchlen+1, sizeof(size_t)): s_prefix_table;
     
     /* keep counter in registers */
     register size_t i, j;
@@ -233,8 +316,8 @@
     /* fill prefix table */
     i = 0; j = 0;
     ptable_w(useheap, ptable, i, j);
-    while (i < match.length) {
-        while (j >= 1 && match.ptr[j-1] != match.ptr[i]) {
+    while (i < matchlen) {
+        while (j >= 1 && match[j-1] != match[i]) {
             ptable_r(j, useheap, ptable, j-1);
         }
         i++; j++;
@@ -243,15 +326,15 @@
 
     /* search */
     i = 0; j = 1;
-    while (i < string.length) {
-        while (j >= 1 && string.ptr[i] != match.ptr[j-1]) {
+    while (i < length) {
+        while (j >= 1 && str[i] != match[j-1]) {
             ptable_r(j, useheap, ptable, j-1);
         }
         i++; j++;
-        if (j-1 == match.length) {
-            size_t start = i - match.length;
-            result.ptr = string.ptr + start;
-            result.length = string.length - start;
+        if (j-1 == matchlen) {
+            size_t start = i - matchlen;
+            result = str + start;
+            resultlen = length - start;
             break;
         }
     }
@@ -261,17 +344,54 @@
         free(ptable);
     }
     
+    *newlen = resultlen;
+    return result;
+}
+
+sstr_t ucx_sstrstr(sstr_t string, scstr_t match) {
+    sstr_t result;
+    
+    size_t reslen;
+    const char *resstr = ucx_strstr(string.ptr, string.length, match.ptr, match.length, &reslen);
+    if(!resstr) {
+        result.ptr = NULL;
+        result.length = 0;
+        return result;
+    }
+    
+    size_t pos = resstr - string.ptr;
+    result.ptr = string.ptr + pos;
+    result.length = reslen;
+    
+    return result;
+}
+
+scstr_t ucx_scstrstr(scstr_t string, scstr_t match) {
+    scstr_t result;
+    
+    size_t reslen;
+    const char *resstr = ucx_strstr(string.ptr, string.length, match.ptr, match.length, &reslen);
+    if(!resstr) {
+        result.ptr = NULL;
+        result.length = 0;
+        return result;
+    }
+    
+    size_t pos = resstr - string.ptr;
+    result.ptr = string.ptr + pos;
+    result.length = reslen;
+    
     return result;
 }
 
 #undef ptable_r
 #undef ptable_w
 
-sstr_t* sstrsplit(sstr_t s, sstr_t d, ssize_t *n) {
-    return sstrsplit_a(ucx_default_allocator(), s, d, n);
+sstr_t* ucx_strsplit(scstr_t s, scstr_t d, ssize_t *n) {
+    return ucx_strsplit_a(ucx_default_allocator(), s, d, n);
 }
 
-sstr_t* sstrsplit_a(UcxAllocator *allocator, sstr_t s, sstr_t d, ssize_t *n) {
+sstr_t* ucx_strsplit_a(UcxAllocator *allocator, scstr_t s, scstr_t d, ssize_t *n) {
     if (s.length == 0 || d.length == 0) {
         *n = -1;
         return NULL;
@@ -300,10 +420,10 @@
     sstr_t* result = (sstr_t*) alcalloc(allocator, arrlen, sizeof(sstr_t));
 
     if (result) {
-        sstr_t curpos = s;
+        scstr_t curpos = s;
         ssize_t j = 1;
         while (1) {
-            sstr_t match;
+            scstr_t match;
             /* optimize for one byte delimiters */
             if (d.length == 1) {
                 match = curpos;
@@ -315,13 +435,13 @@
                     match.length--;
                 }
             } else {
-                match = sstrstr(curpos, d);
+                match = scstrstr(curpos, d);
             }
             if (match.length > 0) {
                 /* is this our last try? */
                 if (nmax == 0 || j < nmax) {
                     /* copy the current string to the array */
-                    sstr_t item = sstrn(curpos.ptr, match.ptr - curpos.ptr);
+                    scstr_t item = scstrn(curpos.ptr, match.ptr - curpos.ptr);
                     result[j-1] = sstrdup_a(allocator, item);
                     size_t processed = item.length + d.length;
                     curpos.ptr += processed;
@@ -367,7 +487,7 @@
     return result;
 }
 
-int sstrcmp(sstr_t s1, sstr_t s2) {
+int ucx_str_cmp(scstr_t s1, scstr_t s2) {
     if (s1.length == s2.length) {
         return memcmp(s1.ptr, s2.ptr, s1.length);
     } else if (s1.length > s2.length) {
@@ -377,7 +497,7 @@
     }
 }
 
-int sstrcasecmp(sstr_t s1, sstr_t s2) {
+int ucx_str_casecmp(scstr_t s1, scstr_t s2) {
     if (s1.length == s2.length) {
 #ifdef _WIN32
         return _strnicmp(s1.ptr, s2.ptr, s1.length);
@@ -391,11 +511,11 @@
     }
 }
 
-sstr_t sstrdup(sstr_t s) {
+sstr_t scstrdup(scstr_t s) {
     return sstrdup_a(ucx_default_allocator(), s);
 }
 
-sstr_t sstrdup_a(UcxAllocator *allocator, sstr_t s) {
+sstr_t scstrdup_a(UcxAllocator *allocator, scstr_t s) {
     sstr_t newstring;
     newstring.ptr = (char*)almalloc(allocator, s.length + 1);
     if (newstring.ptr) {
@@ -410,21 +530,38 @@
     return newstring;
 }
 
-sstr_t sstrtrim(sstr_t string) {
-    sstr_t newstr = string;
+
+size_t ucx_strtrim(const char *s, size_t len, size_t *newlen) {
+    const char *newptr = s;
+    size_t length = len;
     
-    while (newstr.length > 0 && isspace(*newstr.ptr)) {
-        newstr.ptr++;
-        newstr.length--;
+    while(length > 0 && isspace(*newptr)) {
+        newptr++;
+        length--;
     }
-    while (newstr.length > 0 && isspace(newstr.ptr[newstr.length-1])) {
-        newstr.length--;
+    while(length > 0 && isspace(newptr[length-1])) {
+        length--;
     }
     
+    *newlen = length;
+    return newptr - s;
+}
+
+sstr_t sstrtrim(sstr_t string) {
+    sstr_t newstr;
+    newstr.ptr = string.ptr
+                 + ucx_strtrim(string.ptr, string.length, &newstr.length);
     return newstr;
 }
 
-int sstrprefix(sstr_t string, sstr_t prefix) {
+scstr_t scstrtrim(scstr_t string) {
+    scstr_t newstr;
+    newstr.ptr = string.ptr
+                 + ucx_strtrim(string.ptr, string.length, &newstr.length);
+    return newstr;
+}
+
+int ucx_strprefix(scstr_t string, scstr_t prefix) {
     if (string.length == 0) {
         return prefix.length == 0;
     }
@@ -439,7 +576,7 @@
     }
 }
 
-int sstrsuffix(sstr_t string, sstr_t suffix) {
+int ucx_strsuffix(scstr_t string, scstr_t suffix) {
     if (string.length == 0) {
         return suffix.length == 0;
     }
@@ -455,7 +592,7 @@
     }
 }
 
-sstr_t sstrlower(sstr_t string) {
+sstr_t ucx_strlower(scstr_t string) {
     sstr_t ret = sstrdup(string);
     for (size_t i = 0; i < ret.length ; i++) {
         ret.ptr[i] = tolower(ret.ptr[i]);
@@ -463,7 +600,7 @@
     return ret;
 }
 
-sstr_t sstrlower_a(UcxAllocator *allocator, sstr_t string) {
+sstr_t ucx_strlower_a(UcxAllocator *allocator, scstr_t string) {
     sstr_t ret = sstrdup_a(allocator, string);
     for (size_t i = 0; i < ret.length ; i++) {
         ret.ptr[i] = tolower(ret.ptr[i]);
@@ -471,7 +608,7 @@
     return ret;
 }
 
-sstr_t sstrupper(sstr_t string) {
+sstr_t ucx_strupper(scstr_t string) {
     sstr_t ret = sstrdup(string);
     for (size_t i = 0; i < ret.length ; i++) {
         ret.ptr[i] = toupper(ret.ptr[i]);
@@ -479,10 +616,24 @@
     return ret;
 }
 
-sstr_t sstrupper_a(UcxAllocator *allocator, sstr_t string) {
+sstr_t ucx_strupper_a(UcxAllocator *allocator, scstr_t string) {
     sstr_t ret = sstrdup_a(allocator, string);
     for (size_t i = 0; i < ret.length ; i++) {
         ret.ptr[i] = toupper(ret.ptr[i]);
     }
     return ret;
 }
+
+// private string conversion functions
+scstr_t ucx_sc2sc(scstr_t c) {
+    return c;
+}
+scstr_t ucx_ss2sc(sstr_t str) {
+    scstr_t cs;
+    cs.ptr = str.ptr;
+    cs.length = str.length;
+    return cs;
+}
+scstr_t ucx_ss2c_s(scstr_t c) {
+    return c;
+}
diff -r 353d71349e61 -r 90b6d69bb499 src/ucx/string.h
--- a/src/ucx/string.h	Mon May 14 15:58:51 2018 +0200
+++ b/src/ucx/string.h	Mon May 14 17:56:03 2018 +0200
@@ -67,7 +67,6 @@
 #ifdef	__cplusplus
 extern "C" {
 #endif
-
 /**
  * The UCX string structure.
  */
@@ -79,6 +78,56 @@
     size_t length;
 } sstr_t;
 
+typedef struct {
+    const char *ptr;
+    size_t     length;
+} scstr_t;
+
+#ifdef	__cplusplus
+}
+#endif
+
+
+#ifdef __cplusplus
+inline scstr_t s2scstr(sstr_t s) {
+    scstr_t c;
+    c.ptr = s.ptr;
+    c.length = s.ptr;
+    return c;
+}
+inline scstr_t s2scstr(scstr_t c) {
+    return c;
+}
+#define SCSTR s2scstr
+#else
+
+scstr_t ucx_sc2sc(scstr_t c);
+scstr_t ucx_ss2sc(sstr_t str);
+#if __STDC_VERSION__ >= 201112L
+#define SCSTR(str) _Generic(str, sstr_t: ucx_ss2sc, scstr_t: ucx_sc2sc)(str)
+#elif defined(__GNUC__) || defined(__clang__)
+#define SCSTR(str) __builtin_choose_expr( \
+        __builtin_types_compatible_p(typeof(str), sstr_t), \
+        ucx_ss2sc, \
+        ucx_sc2sc)(str)
+#elif defined(__sun)
+#define SCSTR(str) ({typeof(str) ucx_tmp_var_str = str; \
+	scstr_t ucx_tmp_var_c; \
+	ucx_tmp_var_c.ptr = ucx_tmp_var_str.ptr;\
+	ucx_tmp_var_c.length = ucx_tmp_var_str.length;\
+	ucx_tmp_var_c; })
+#else
+scstr_t ucx_ss2c_s();
+#define SCSTR ucx_ss2c_s
+#endif /* C11 feature test */
+
+#endif /* C++ */
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+
 /**
  * Creates a new sstr_t based on a C string.
  * 
@@ -110,6 +159,9 @@
 sstr_t sstrn(char *cstring, size_t length);
 
 
+scstr_t scstr(const char *cstring);
+scstr_t scstrn(const char *cstring, size_t length);
+
 /**
  * Returns the cumulated length of all specified strings.
  *
@@ -123,7 +175,9 @@
  * @param ...      all other strings
  * @return the cumulated length of all strings
  */
-size_t sstrnlen(size_t count, sstr_t string, ...);
+size_t ucx_strnlen(size_t count, ...);
+
+#define sstrnlen(count, ...) ucx_strnlen(count, __VA_ARGS__)
 
 /**
  * Concatenates two or more strings.
@@ -136,11 +190,12 @@
  *
  * @param count   the total number of strings to concatenate
  * @param s1      first string
- * @param s2      second string
  * @param ...     all remaining strings
  * @return the concatenated string
  */
-sstr_t sstrcat(size_t count, sstr_t s1, sstr_t s2, ...);
+sstr_t ucx_strcat(size_t count, scstr_t s1, ...);
+
+#define sstrcat(count, s1, ...) ucx_strcat(count, SCSTR(s1), __VA_ARGS__)
 
 /**
  * Concatenates two or more strings using a UcxAllocator.
@@ -150,12 +205,12 @@
  * @param a       the allocator to use
  * @param count   the total number of strings to concatenate
  * @param s1      first string
- * @param s2      second string
  * @param ...     all remaining strings
  * @return the concatenated string
  */
-sstr_t sstrcat_a(UcxAllocator *a, size_t count, sstr_t s1, sstr_t s2, ...);
+sstr_t ucx_strcat_a(UcxAllocator *a, size_t count, scstr_t s1, ...);
 
+#define sstrcat_a(count, s1, ...) ucx_strcat_a(count, SCSTR(s1), __VA_ARGS__)
 
 /**
  * Returns a substring starting at the specified location.
@@ -191,6 +246,13 @@
  */
 sstr_t sstrsubsl(sstr_t string, size_t start, size_t length);
 
+scstr_t scstrsubs(scstr_t s, size_t start);
+scstr_t scstrsubsl(scstr_t string, size_t start, size_t length);
+
+
+int ucx_strchr(const char *string, size_t length, int chr, size_t *pos);
+int ucx_strrchr(const char *string, size_t length, int chr, size_t *pos);
+
 /**
  * Returns a substring starting at the location of the first occurrence of the
  * specified character.
@@ -219,6 +281,17 @@
  */
 sstr_t sstrrchr(sstr_t string, int chr);
 
+
+scstr_t scstrchr(scstr_t string, int chr);
+scstr_t scstrrchr(scstr_t string, int chr);
+
+const char* ucx_strstr(
+        const char *str,
+        size_t length,
+        const char *match,
+        size_t matchlen,
+        size_t *newlen);
+
 /**
  * Returns a substring starting at the location of the first occurrence of the
  * specified string.
@@ -234,7 +307,11 @@
  *               <code>match</code>, or an empty string, if the sequence is not
  *               present in <code>string</code>
  */
-sstr_t sstrstr(sstr_t string, sstr_t match);
+sstr_t ucx_sstrstr(sstr_t string, scstr_t match);
+#define sstrstr(string, match) ucx_sstrstr(string, SCSTR(match))
+
+scstr_t ucx_scstrstr(scstr_t string, scstr_t match);
+#define scstrstr(string, match) ucx_scstrstr(string, SCSTR(match))
 
 /**
  * Splits a string into parts by using a delimiter string.
@@ -283,7 +360,9 @@
  * 
  * @see sstrsplit_a()
  */
-sstr_t* sstrsplit(sstr_t string, sstr_t delim, ssize_t *count);
+sstr_t* ucx_strsplit(scstr_t string, scstr_t delim, ssize_t *count);
+
+#define sstrsplit(s, delim, count) ucx_strsplit(SCSTR(s), SCSTR(delim), count)
 
 /**
  * Performing sstrsplit() using a UcxAllocator.
@@ -307,9 +386,11 @@
  * 
  * @see sstrsplit()
  */
-sstr_t* sstrsplit_a(UcxAllocator *allocator, sstr_t string, sstr_t delim,
+sstr_t* ucx_strsplit_a(UcxAllocator *allocator, scstr_t string, scstr_t delim,
         ssize_t *count);
 
+#define sstrsplit_a(a, s, d, c) ucx_strsplit_a(a, SCSTR(s), SCSTR(d, c))
+
 /**
  * Compares two UCX strings with standard <code>memcmp()</code>.
  * 
@@ -322,7 +403,9 @@
  * length of s1 is greater than the length of s2 or the result of
  * <code>memcmp()</code> otherwise (i.e. 0 if the strings match)
  */
-int sstrcmp(sstr_t s1, sstr_t s2);
+int ucx_str_cmp(scstr_t s1, scstr_t s2);
+
+#define sstrcmp(s1, s2) ucx_str_cmp(SCSTR(s1), SCSTR(s2))
 
 /**
  * Compares two UCX strings ignoring the case.
@@ -338,7 +421,9 @@
  * first two differing characters otherwise (i.e. 0 if the strings match and
  * no characters differ)
  */
-int sstrcasecmp(sstr_t s1, sstr_t s2);
+int ucx_str_casecmp(scstr_t s1, scstr_t s2);
+
+#define sstrcasecmp(s1, s2) ucx_str_casecmp(SCSTR(s1), SCSTR(s2))
 
 /**
  * Creates a duplicate of the specified string.
@@ -354,7 +439,9 @@
  * @return a duplicate of the string
  * @see sstrdup_a()
  */
-sstr_t sstrdup(sstr_t string);
+sstr_t scstrdup(scstr_t string);
+
+#define sstrdup(s) scstrdup(SCSTR(s))
 
 /**
  * Creates a duplicate of the specified string using a UcxAllocator.
@@ -372,7 +459,12 @@
  * @return a duplicate of the string
  * @see sstrdup()
  */
-sstr_t sstrdup_a(UcxAllocator *allocator, sstr_t string);
+sstr_t scstrdup_a(UcxAllocator *allocator, scstr_t string);
+
+#define sstrdup_a(allocator, s) scstrdup_a(allocator, SCSTR(s))
+
+
+size_t ucx_strtrim(const char *str, size_t length, size_t *newlen);
 
 /**
  * Omits leading and trailing spaces.
@@ -393,13 +485,17 @@
  */
 sstr_t sstrtrim(sstr_t string);
 
+scstr_t scstrtrim(scstr_t string);
+
 /**
  * Checks, if a string has a specific prefix.
  * @param string the string to check
  * @param prefix the prefix the string should have
  * @return 1, if and only if the string has the specified prefix, 0 otherwise
  */
-int sstrprefix(sstr_t string, sstr_t prefix);
+int ucx_strprefix(scstr_t string, scstr_t prefix);
+
+#define sstrprefix(string, prefix) ucx_strprefix(SCSTR(string), SCSTR(prefix))
 
 /**
  * Checks, if a string has a specific suffix.
@@ -407,7 +503,9 @@
  * @param suffix the suffix the string should have
  * @return 1, if and only if the string has the specified suffix, 0 otherwise
  */
-int sstrsuffix(sstr_t string, sstr_t suffix);
+int ucx_strsuffix(scstr_t string, scstr_t suffix);
+
+#define sstrsuffix(string, prefix) ucx_strsuffix(SCSTR(string), SCSTR(prefix))
 
 /**
  * Returns a lower case version of a string.
@@ -419,7 +517,9 @@
  * @return the resulting lower case string
  * @see sstrdup()
  */
-sstr_t sstrlower(sstr_t string);
+sstr_t ucx_strlower(scstr_t string);
+
+#define sstrlower(string) ucx_strlower(SCSTR(string))
 
 /**
  * Returns a lower case version of a string.
@@ -432,7 +532,9 @@
  * @return the resulting lower case string
  * @see sstrdup_a()
  */
-sstr_t sstrlower_a(UcxAllocator *allocator, sstr_t string);
+sstr_t ucx_strlower_a(UcxAllocator *allocator, scstr_t string);
+
+#define sstrlower_a(allocator, string) ucx_strlower_a(allocator, SCSTR(string))
 
 /**
  * Returns a upper case version of a string.
@@ -444,7 +546,9 @@
  * @return the resulting upper case string
  * @see sstrdup()
  */
-sstr_t sstrupper(sstr_t string);
+sstr_t ucx_strupper(scstr_t string);
+
+#define sstrupper(string) ucx_strupper(SCSTR(string))
 
 /**
  * Returns a upper case version of a string.
@@ -457,7 +561,9 @@
  * @return the resulting upper case string
  * @see sstrdup_a()
  */
-sstr_t sstrupper_a(UcxAllocator *allocator, sstr_t string);
+sstr_t ucx_strupper_a(UcxAllocator *allocator, scstr_t string);
+
+#define sstrupper_a(allocator, string) ucx_strupper_a(allocator, string)
 
 #ifdef	__cplusplus
 }
diff -r 353d71349e61 -r 90b6d69bb499 src/ucx/ucx.h
--- a/src/ucx/ucx.h	Mon May 14 15:58:51 2018 +0200
+++ b/src/ucx/ucx.h	Mon May 14 17:56:03 2018 +0200
@@ -37,10 +37,10 @@
 #define	UCX_H
 
 /** Major UCX version as integer constant. */
-#define UCX_VERSION_MAJOR   1
+#define UCX_VERSION_MAJOR   2
 
 /** Minor UCX version as integer constant. */
-#define UCX_VERSION_MINOR   1
+#define UCX_VERSION_MINOR   0
 
 /** Version constant which ensures to increase monotonically. */
 #define UCX_VERSION (((UCX_VERSION_MAJOR)<<16)|UCX_VERSION_MINOR)
diff -r 353d71349e61 -r 90b6d69bb499 test/string_tests.c
--- a/test/string_tests.c	Mon May 14 15:58:51 2018 +0200
+++ b/test/string_tests.c	Mon May 14 17:56:03 2018 +0200
@@ -77,7 +77,12 @@
     UCX_TEST_BEGIN
     
     sstr_t notfound = sstrchr(str, 'x');
-    UCX_TEST_ASSERT(notfound.length == 0, "string length not 0");
+    UCX_TEST_ASSERT(notfound.length == 0,
+            "string length not 0 after forward search w/o result");
+    
+    notfound = sstrrchr(str, 'x');
+    UCX_TEST_ASSERT(notfound.length == 0,
+            "string length not 0 after reverse search w/o result");
     
     sstr_t result = sstrchr(str, 'w');
     UCX_TEST_ASSERT(result.length == 35, "sstrchr returned wrong length");