# HG changeset patch
# User Mike Becker <universe@uap-core.de>
# Date 1405349650 -7200
# Node ID 998bf7c643b4c16be52d5e1422949f3abb9a9f8b
# Parent  1e9012ad8215c97e4b941a474276d2c8647f7968# Parent  2185f19dcc45b45f0f70550059ddc6952845fd8e
merged sstrcat function

diff -r 1e9012ad8215 -r 998bf7c643b4 test/main.c
--- a/test/main.c	Mon Jul 14 13:20:03 2014 +0200
+++ b/test/main.c	Mon Jul 14 16:54:10 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 1e9012ad8215 -r 998bf7c643b4 test/string_tests.c
--- a/test/string_tests.c	Mon Jul 14 13:20:03 2014 +0200
+++ b/test/string_tests.c	Mon Jul 14 16:54:10 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 1e9012ad8215 -r 998bf7c643b4 test/string_tests.h
--- a/test/string_tests.h	Mon Jul 14 13:20:03 2014 +0200
+++ b/test/string_tests.h	Mon Jul 14 16:54:10 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 1e9012ad8215 -r 998bf7c643b4 ucx/Makefile
--- a/ucx/Makefile	Mon Jul 14 13:20:03 2014 +0200
+++ b/ucx/Makefile	Mon Jul 14 16:54:10 2014 +0200
@@ -39,6 +39,7 @@
 SRC += allocator.c
 SRC += logging.c
 SRC += buffer.c
+SRC += stack.c
 
 OBJ   = $(SRC:%.c=../build/release/ucx/%$(OBJ_EXT))
 OBJ_D = $(SRC:%.c=../build/debug/ucx/%$(OBJ_EXT))
diff -r 1e9012ad8215 -r 998bf7c643b4 ucx/stack.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ucx/stack.c	Mon Jul 14 16:54:10 2014 +0200
@@ -0,0 +1,108 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Olaf Wintermann. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "stack.h"
+#include <string.h>
+
+UcxStack ucx_stack_new(char* space, size_t size) {
+    UcxStack stack;
+    stack.size = size;
+    stack.space = stack.top = space;
+    
+    UcxAllocator alloc;
+    alloc.pool = &stack;
+    alloc.malloc = (ucx_allocator_malloc) ucx_stack_malloc;
+    alloc.calloc = (ucx_allocator_calloc) ucx_stack_calloc;
+    alloc.realloc = (ucx_allocator_realloc) ucx_stack_realloc;
+    alloc.free = (ucx_allocator_free) ucx_stack_free;
+    
+    stack.allocator = alloc;
+    
+    return stack;
+}
+
+void *ucx_stack_malloc(UcxStack *stack, size_t n) {
+    n += n % sizeof(void*);
+
+    if (stack->top + n + sizeof(size_t) > stack->space + stack->size) {
+        return NULL;
+    } else {
+        void *ptr = stack->top;
+        
+        *((size_t*) (stack->top + n)) = n;
+        stack->top += n + sizeof(size_t);
+        
+        return ptr;
+    }
+}
+
+void *ucx_stack_calloc(UcxStack *stack, size_t nelem, size_t elsize) {
+    void *mem = ucx_stack_malloc(stack, nelem*elsize);
+    memset(mem, 0, nelem*elsize);
+    return mem;
+}
+
+void *ucx_stack_realloc(UcxStack *stack, void *ptr, size_t n) {
+    if (ptr == stack->top - sizeof(size_t) - *((size_t*) stack->top - 1)) {
+
+        stack->top = (char*)ptr + n;
+        *((size_t*)stack->top) = n;
+        stack->top += sizeof(size_t);
+        
+        return ptr;
+    } else {
+        size_t* sptr = (size_t*) (((char*) ptr)-sizeof(size_t));
+        if (*sptr < n) {
+            void *nptr = ucx_stack_malloc(stack, n);
+            if (nptr) {
+                memcpy(nptr, ptr, *sptr);
+                ucx_stack_free(stack, ptr);
+                return nptr;
+            } else {
+                return NULL;
+            }
+        } else {
+            *sptr = n;
+            return ptr;
+        }
+    }
+}
+
+void ucx_stack_free(UcxStack *stack, void *ptr) {
+    if (ptr == stack->top+sizeof(size_t)) {
+        
+    } else {
+        
+    }
+}
+
+void ucx_stack_pop(UcxStack *stack, void *dest) {
+}
+
+void ucx_stack_popn(UcxStack *stack, void *dest, size_t n) {
+}
diff -r 1e9012ad8215 -r 998bf7c643b4 ucx/stack.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ucx/stack.h	Mon Jul 14 16:54:10 2014 +0200
@@ -0,0 +1,198 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Olaf Wintermann. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * @file stack.h
+ * 
+ * Default stack memory allocation implementation.
+ * 
+ * @author Mike Becker
+ * @author Olaf Wintermann
+ */
+
+#ifndef UCX_STACK_H
+#define	UCX_STACK_H
+
+#include "ucx.h"
+#include <stddef.h>
+#include "allocator.h"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+
+/**
+ * UCX stack structure.
+ */
+typedef struct {
+    /** UcxAllocator based on this stack */
+    UcxAllocator allocator;
+    
+    /** Stack size. */
+    size_t size;
+    
+    /** Pointer to the bottom of the stack */
+    char *space;
+    
+    /** Pointer to the top of the stack */
+    char *top;
+} UcxStack;
+
+/**
+ * Wraps memory in a new UcxStack structure.
+ * 
+ * @param space the memory area that shall be managed
+ * @param size size of the memory area
+ * @return a new UcxStack structure
+ */
+UcxStack ucx_stack_new(char* space, size_t size);
+
+/**
+ * Allocates stack memory.
+ * 
+ * @param stack a pointer to the stack
+ * @param n amount of memory to allocate
+ * @return a pointer to the allocated memory
+ * @see ucx_allocator_malloc()
+ */
+void *ucx_stack_malloc(UcxStack *stack, size_t n);
+
+/**
+ * Alias for #ucx_stack_malloc().
+ * @param stack a pointer to the stack
+ * @param n amount of memory to allocate
+ * @return a pointer to the allocated memory
+ * @see ucx_stack_malloc
+ */
+#define ucx_stack_push(s, n) ucx_stack_malloc(s, n)
+
+/**
+ * Allocates an array of stack memory
+ * 
+ * The content of the allocated memory is set to zero.
+ * 
+ * @param stack a pointer to the stack
+ * @param nelem amount of elements to allocate
+ * @param elsize amount of memory per element
+ * @return a pointer to the allocated memory
+ * @see ucx_allocator_calloc()
+ */
+void *ucx_stack_calloc(UcxStack *stack, size_t nelem, size_t elsize);
+
+/**
+ * Alias for #ucx_stack_calloc().
+ * 
+ * @param stack a pointer to the stack
+ * @param nelem amount of elements to allocate
+ * @param elsize amount of memory per element
+ * @return a pointer to the allocated memory
+ * @see ucx_stack_calloc
+ */
+#define ucx_stack_pusharr(st,n,es) ucx_stack_calloc(st,n,es)
+
+/**
+ * Reallocates memory on the stack.
+ * 
+ * Shrinking memory is always safe. Extending memory can be very expensive. 
+ * 
+ * @param stack the stack
+ * @param ptr a pointer to the memory that shall be reallocated
+ * @param n the new size of the memory
+ * @return a pointer to the new location of the memory
+ * @see ucx_allocator_realloc()
+ */
+void *ucx_stack_realloc(UcxStack *stack, void *ptr, size_t n);
+
+/**
+ * Frees memory on the stack.
+ * 
+ * Freeing stack memory behaves in a special way.
+ * 
+ * If the element, that should be freed, is the top most element of the stack,
+ * it is removed from the stack. Otherwise it is marked as freed. Marked
+ * elements are removed, when they become the top most elements of the stack.
+ * 
+ * @param stack a pointer to the stack
+ * @param ptr a pointer to the memory that shall be freed
+ */
+void ucx_stack_free(UcxStack *stack, void *ptr);
+
+
+/**
+ * Returns the size of the top most element.
+ * @param stack a pointer to the stack
+ * @return the size of the top most element
+ */
+#define ucx_stack_topsize(stack) (*(((size_t*)stack->top - 1))
+
+/**
+ * Removes the top most element from the stack and copies the content to <code>
+ * dest</code>, if specified.
+ * 
+ * Use #ucx_stack_topsize()# to get the amount of memory that must be available
+ * at the location of <code>dest</code>.
+ * 
+ * @param stack a pointer to the stack
+ * @param dest the location where the contents shall be written to, or <code>
+ * NULL</code>, if the element shall only be removed.
+ * @see ucx_stack_free
+ * @see ucx_stack_popn
+ */
+void ucx_stack_pop(UcxStack *stack, void *dest);
+
+/**
+ * Removes the top most element from the stack and copies the content to <code>
+ * dest</code>.
+ * 
+ * In contrast to #ucx_stack_pop() the <code>dest</code> pointer <code>MUST
+ * NOT</code> be <code>NULL</code>.
+ * 
+ * @param stack a pointer to the stack
+ * @param dest the location where the contents shall be written to
+ * @param n copies at most n elements to <code>dest</code>
+ * @see ucx_stack_pop
+ */
+void ucx_stack_popn(UcxStack *stack, void *dest, size_t n);
+
+/**
+ * Returns the remaining available memory on the specified stack.
+ * 
+ * @param stack a pointer to the stack
+ * @return the remaining available memory
+ */
+#define ucx_stack_avail(stack) ((stack->size)  - (s.top - s.space)\
+                                - sizeof(size_t))
+
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* UCX_STACK_H */
+
diff -r 1e9012ad8215 -r 998bf7c643b4 ucx/string.c
--- a/ucx/string.c	Mon Jul 14 13:20:03 2014 +0200
+++ b/ucx/string.c	Mon Jul 14 16:54:10 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 = almalloc(a, 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 1e9012ad8215 -r 998bf7c643b4 ucx/string.h
--- a/ucx/string.h	Mon Jul 14 13:20:03 2014 +0200
+++ b/ucx/string.h	Mon Jul 14 16:54:10 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