diff -r c9d37bb97ea8 -r 0bbbb0341606 libidav/utils.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libidav/utils.c	Mon Aug 26 14:42:09 2013 +0200
@@ -0,0 +1,259 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2013 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 <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ucx/string.h>
+#include <libxml/tree.h>
+#include <curl/curl.h>
+
+#include <openssl/sha.h>
+#include <openssl/hmac.h>
+#include <openssl/evp.h>
+#include <openssl/bio.h>
+#include <openssl/buffer.h>
+
+#include "utils.h"
+
+
+time_t util_parse_creationdate(char *str) {
+    // example: 2012-11-29T21:35:35Z
+    if(!str) {
+        return 0;
+    }
+    // TODO
+    return 0;
+}
+
+time_t util_parse_lastmodified(char *str) {
+    // example: Thu, 29 Nov 2012 21:35:35 GMT
+    if(!str) {
+        return 0;
+    } else {
+        return curl_getdate(str, NULL);
+    }
+}
+
+int util_getboolean(char *v) {
+    if(v[0] == 'T' || v[0] == 't') {
+        return 1;
+    }
+    return 0;
+}
+
+int util_strtoint(char *str, int64_t *value) {
+    char *end;
+    int64_t val = strtoll(str, &end, 0);
+    if(strlen(end) == 0) {
+        *value = val;
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
+char* util_url_path(char *url) { 
+    char *path = NULL;
+    size_t len = strlen(url);
+    int slashcount = 0;
+    int slmax;
+    if(len > 7 && !strncasecmp(url, "http://", 7)) {
+        slmax = 3;
+    } else if(len > 8 && !strncasecmp(url, "https://", 8)) {
+        slmax = 3;
+    } else {
+        slmax = 1;
+    }
+    char c;
+    for(int i=0;i<len;i++) {
+        c = url[i];
+        if(c == '/') {
+            slashcount++;
+            if(slashcount == slmax) {
+                path = url + i;
+                break;
+            }
+        }
+    } 
+    return path;
+}
+
+char* util_resource_name(char *url) {
+    int si = 0;
+    int osi = 0;
+    int i = 0;
+    int p = 0;
+    char c;
+    while((c = url[i]) != 0) {
+        if(c == '/') {
+            osi = si;
+            si = i;
+            p = 1;
+        }
+        i++;
+    }
+    
+    char *name = url + si + p;
+    if(name[0] == 0) {
+        name = url + osi + p;
+        if(name[0] == 0) {
+            return url;
+        }
+    }
+    
+    return name;
+}
+
+int util_mkdir(char *path, mode_t mode) {
+#ifdef _WIN32
+    return mkdir(path);
+#else
+    return mkdir(path, mode);
+#endif
+}
+
+char* util_concat_path(char *url_base, char *p) {
+    sstr_t base = sstr(url_base);
+    sstr_t path;
+    if(p) {
+        path = sstr(p);
+    } else {
+        path = sstrn("", 0);
+    }
+    
+    int add_separator = 0;
+    if(base.ptr[base.length-1] == '/') {
+        if(path.ptr[0] == '/') {
+            base.length--;
+        }
+    } else {
+        if(path.length == 0 || path.ptr[0] != '/') {
+            add_separator = 1;
+        }
+    }
+    
+    sstr_t url;
+    url.length = base.length + path.length + add_separator;
+    url.ptr = malloc(url.length + 1);
+    url.ptr[url.length] = '\0';
+    
+    if(add_separator) {
+        url = sstrncat(url, 3, base, sstr("/"), path);
+    } else {
+        url = sstrncat(url, 2, base, path);
+    }
+    
+    return url.ptr;
+}
+
+char* util_parent_path(char *path) {
+    char *name = util_resource_name(path);
+    size_t namelen = strlen(name);
+    size_t pathlen = strlen(path);
+    size_t parentlen = pathlen - namelen;
+    char *parent = malloc(parentlen + 1);
+    memcpy(parent, path, parentlen);
+    parent[parentlen] = '\0';
+    return parent;
+}
+
+
+char* util_xml_get_text(xmlNode *elm) {
+    xmlNode *node = elm->children;
+    while(node) {
+        if(node->type == XML_TEXT_NODE) {
+            return (char*)node->content;
+        }
+        node = node->next;
+    }
+    return NULL;
+}
+
+
+
+char* util_base64decode(char* in) {
+    size_t len = strlen(in);
+    char *out = calloc(1, len);
+    
+    BIO* b = BIO_new_mem_buf(in, len);
+    BIO *d = BIO_new(BIO_f_base64());
+    BIO_set_flags(d, BIO_FLAGS_BASE64_NO_NL);
+    b = BIO_push(d, b);
+
+    BIO_read(b, out, len);
+    BIO_free_all(b);
+    
+    return out;
+}
+
+/*
+ * gets a substring from 0 to the appearance of the token
+ * tokens are separated by space
+ * sets sub to the substring and returns the remaining string
+ */
+sstr_t util_getsubstr_until_token(sstr_t str, sstr_t token, sstr_t *sub) {  
+    int i;
+    int token_start = -1;
+    int token_end = -1;
+    for(i=0;i<=str.length;i++) {
+        int c;
+        if(i == str.length) {
+            c = ' ';
+        } else {
+            c = str.ptr[i];
+        }
+        if(c < 33) {
+            if(token_start != -1) {
+                token_end = i;
+                size_t len = token_end - token_start;
+                sstr_t tk = sstrsubsl(str, token_start, len);
+                //printf("token: {%.*s}\n", token.length, token.ptr);
+                if(!sstrcmp(tk, token)) {
+                    *sub = sstrtrim(sstrsubsl(str, 0, token_start));
+                    break;
+                }
+                token_start = -1;
+                token_end = -1;
+            }
+        } else {
+            if(token_start == -1) {
+                token_start = i;
+            }
+        }
+    }
+    
+    if(i < str.length) {
+        return sstrtrim(sstrsubs(str, i));
+    } else {
+        str.ptr = NULL;
+        str.length = 0;
+        return str;
+    }
+}