Diff: connection_string_parser.c

Revision:

16:18e7ebd42bb2

Child:

18:6d8a413a4d9a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/connection_string_parser.c	Wed Dec 14 16:00:59 2016 -0800
@@ -0,0 +1,133 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+#include "azure_c_shared_utility/connection_string_parser.h"
+#include "azure_c_shared_utility/map.h"
+#include "azure_c_shared_utility/strings.h"
+#include "azure_c_shared_utility/string_tokenizer.h"
+#include <stdbool.h>
+#include "azure_c_shared_utility/xlogging.h"
+
+/* Codes_SRS_CONNECTIONSTRINGPARSER_01_001: [connectionstringparser_parse shall parse all key value pairs from the connection_string passed in as argument and return a new map that holds the key/value pairs.] */
+MAP_HANDLE connectionstringparser_parse(STRING_HANDLE connection_string)
+{
+    MAP_HANDLE result;
+
+    if (connection_string == NULL)
+    {
+        /* Codes_SRS_CONNECTIONSTRINGPARSER_01_002: [If connection_string is NULL then connectionstringparser_parse shall fail and return NULL.] */
+        result = NULL;
+        LogError("NULL connection string passed to tokenizer.\r\n");
+    }
+    else
+    {
+        /* Codes_SRS_CONNECTIONSTRINGPARSER_01_003: [connectionstringparser_parse shall create a STRING tokenizer to be used for parsing the connection string, by calling STRING_TOKENIZER_create.] */
+        /* Codes_SRS_CONNECTIONSTRINGPARSER_01_004: [connectionstringparser_parse shall start scanning at the beginning of the connection string.] */
+        STRING_TOKENIZER_HANDLE tokenizer = STRING_TOKENIZER_create(connection_string);
+        if (tokenizer == NULL)
+        {
+            /* Codes_SRS_CONNECTIONSTRINGPARSER_01_015: [If STRING_TOKENIZER_create fails, connectionstringparser_parse shall fail and return NULL.] */
+            result = NULL;
+            LogError("Error creating STRING tokenizer.\r\n");
+        }
+        else
+        {
+            /* Codes_SRS_CONNECTIONSTRINGPARSER_01_016: [2 STRINGs shall be allocated in order to hold the to be parsed key and value tokens.] */
+            STRING_HANDLE token_key_string = STRING_new();
+            if (token_key_string == NULL)
+            {
+                /* Codes_SRS_CONNECTIONSTRINGPARSER_01_017: [If allocating the STRINGs fails connectionstringparser_parse shall fail and return NULL.] */
+                result = NULL;
+                LogError("Error creating key token STRING.\r\n");
+            }
+            else
+            {
+                STRING_HANDLE token_value_string = STRING_new();
+                if (token_value_string == NULL)
+                {
+                    /* Codes_SRS_CONNECTIONSTRINGPARSER_01_017: [If allocating the STRINGs fails connectionstringparser_parse shall fail and return NULL.] */
+                    result = NULL;
+                    LogError("Error creating value token STRING.\r\n");
+                }
+                else
+                {
+                    result = Map_Create(NULL);
+                    if (result == NULL)
+                    {
+                        /* Codes_SRS_CONNECTIONSTRINGPARSER_01_018: [If creating the result map fails, then connectionstringparser_parse shall return NULL.] */
+                        LogError("Error creating Map\r\n");
+                    }
+                    else
+                    {
+                        /* Codes_SRS_CONNECTIONSTRINGPARSER_01_005: [The following actions shall be repeated until parsing is complete:] */
+                        /* Codes_SRS_CONNECTIONSTRINGPARSER_01_006: [connectionstringparser_parse shall find a token (the key of the key/value pair) delimited by the `=` character, by calling STRING_TOKENIZER_get_next_token.] */
+                        /* Codes_SRS_CONNECTIONSTRINGPARSER_01_007: [If STRING_TOKENIZER_get_next_token fails, parsing shall be considered complete.] */
+                        while (STRING_TOKENIZER_get_next_token(tokenizer, token_key_string, "=") == 0)
+                        {
+                            bool is_error = false;
+
+                            /* Codes_SRS_CONNECTIONSTRINGPARSER_01_008: [connectionstringparser_parse shall find a token (the value of the key/value pair) delimited by the `;` character, by calling STRING_TOKENIZER_get_next_token.] */
+                            if (STRING_TOKENIZER_get_next_token(tokenizer, token_value_string, ";") != 0)
+                            {
+                                /* Codes_SRS_CONNECTIONSTRINGPARSER_01_009: [If STRING_TOKENIZER_get_next_token fails, connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */
+                                is_error = true;
+                                LogError("Error reading value token from the connection string.\r\n");
+                            }
+                            else
+                            {
+                                /* Codes_SRS_CONNECTIONSTRINGPARSER_01_011: [The C strings for the key and value shall be extracted from the previously parsed STRINGs by using STRING_c_str.] */
+                                const char* token = STRING_c_str(token_key_string);
+                                /* Codes_SRS_CONNECTIONSTRINGPARSER_01_013: [If STRING_c_str fails then connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */
+                                if ((token == NULL) ||
+                                    /* Codes_SRS_CONNECTIONSTRINGPARSER_01_019: [If the key length is zero then connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */
+                                    (strlen(token) == 0))
+                                {
+                                    is_error = true;
+                                    LogError("The key token is NULL or empty.\r\n");
+                                }
+                                else
+                                {
+                                    /* Codes_SRS_CONNECTIONSTRINGPARSER_01_011: [The C strings for the key and value shall be extracted from the previously parsed STRINGs by using STRING_c_str.] */
+                                    const char* value = STRING_c_str(token_value_string);
+                                    if (value == NULL)
+                                    {
+                                        /* Codes_SRS_CONNECTIONSTRINGPARSER_01_013: [If STRING_c_str fails then connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */
+                                        is_error = true;
+                                        LogError("Could not get C string for value token.\r\n");
+                                    }
+                                    else
+                                    {
+                                        /* Codes_SRS_CONNECTIONSTRINGPARSER_01_010: [The key and value shall be added to the result map by using Map_Add.] */
+                                        if (Map_Add(result, token, value) != 0)
+                                        {
+                                            /* Codes_SRS_CONNECTIONSTRINGPARSER_01_012: [If Map_Add fails connectionstringparser_parse shall fail and return NULL (freeing the allocated result map).] */
+                                            is_error = true;
+                                            LogError("Could not add the key/value pair to the result map.\r\n");
+                                        }
+                                    }
+                                }
+                            }
+
+                            if (is_error)
+                            {
+                                LogError("Error parsing connection string.\r\n");
+                                Map_Destroy(result);
+                                result = NULL;
+                                break;
+                            }
+                        }
+                    }
+
+                    STRING_delete(token_value_string);
+                }
+
+                STRING_delete(token_key_string);
+            }
+
+            /* Codes_SRS_CONNECTIONSTRINGPARSER_01_014: [After the parsing is complete the previously allocated STRINGs and STRING tokenizer shall be freed by calling STRING_TOKENIZER_destroy.] */
+            STRING_TOKENIZER_destroy(tokenizer);
+        }
+    }
+
+    return result;
+}