src/server/ucx/sstring.c

changeset 14
b8bf95b39952
parent 1
3c066d52342d
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/server/ucx/sstring.c	Sat Jan 14 13:53:44 2012 +0100
@@ -0,0 +1,125 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2011 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 <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include "sstring.h"
+
+sstr_t sstr (char *s) {
+    sstr_t string;
+    if(s == NULL) {
+        string.length = 0;
+        string.ptr = NULL;
+    } else {
+        string.ptr = s;
+        string.length = strlen(s);
+    }
+    return string;
+}
+
+sstr_t sstrn (char *s, size_t n) {
+    sstr_t string;
+    string.ptr = s;
+    string.length = n;
+    return string;
+}
+
+size_t sstrnlen (size_t n, sstr_t s, ...) {
+    va_list ap;
+    size_t size = s.length;
+    va_start(ap, s);
+
+    for (int i=0;i<n-1;i++) {
+        sstr_t str = va_arg(ap, sstr_t);
+        size += str.length;
+    }
+
+    return size;
+}
+
+sstr_t sstrcat (sstr_t s, ...) {
+    va_list ap;
+    va_start(ap, s);
+    s.ptr[0] = 0;
+
+    sstr_t str = va_arg (ap, sstr_t);
+    while (str.ptr != NULL) {
+        s.ptr = strncat (s.ptr, str.ptr, s.length);
+        str = va_arg (ap, sstr_t);
+    }
+    
+    return s;
+}
+
+sstr_t sstrncat (size_t n, sstr_t s, sstr_t c1, ...) {
+    va_list ap;
+    va_start(ap, c1);
+    s.ptr[0] = 0;
+
+    s.ptr = strncat (s.ptr, c1.ptr, s.length);
+    for (int i=0;i<n-1;i++) {
+        sstr_t str = va_arg (ap, sstr_t);
+        s.ptr = strncat (s.ptr, str.ptr, s.length);
+    }
+
+    return s;
+}
+
+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 < 0 || start >= s.length || length < 0) {
+        return s;
+    }
+    if (length > s.length-start) {
+        length = s.length-start;
+    }
+    new_sstr.ptr = &s.ptr[start];
+    new_sstr.length = length;
+    return new_sstr;
+}
+
+int sstrcmp(sstr_t s1, sstr_t s2) {
+    return strncmp(s1.ptr, s2.ptr, s1.length>s2.length ? s2.length: s1.length);
+}
+
+sstr_t sstrdub(sstr_t s) {
+    sstr_t newstring;
+    newstring.ptr = malloc(s.length + 1);
+    newstring.length = s.length;
+    newstring.ptr[newstring.length] = 0;
+
+    memcpy(newstring.ptr, s.ptr, s.length);
+
+    return newstring;
+}

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