Diff: ConfigFile.cpp

Revision:

0:7f26f0680202

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ConfigFile.cpp	Fri Dec 31 14:01:14 2010 +0000
@@ -0,0 +1,415 @@
+/**
+ * Configuration file interface class (Version 0.0.1)
+ *
+ * Copyright (C) 2010 Shinichiro Nakamura (CuBeatSystems)
+ * http://shinta.main.jp/
+ */
+#include "ConfigFile.h"
+
+#define NEWLINE_UNIX "\n"
+#define NEWLINE_DOS "\r\n"
+#define NEWLINE_MAC "\r"
+
+/**
+ * Create a configuration file class.
+ */
+ConfigFile::ConfigFile() {
+    /*
+     * Allocation for a config_t list.
+     */
+    configlist = (config_t **)malloc(sizeof(config_t *) * MAXCONFIG);
+    for (int i = 0; i < MAXCONFIG; i++) {
+        configlist[i] = NULL;
+    }
+}
+
+/**
+ * Destroy a configuration file class.
+ */
+ConfigFile::~ConfigFile() {
+    /*
+     * Remove all storage and the contents.
+     */
+    for (int i = 0; i < MAXCONFIG; i++) {
+        config_t *cfg = configlist[i];
+        if (cfg != NULL) {
+            free(cfg->key);
+            free(cfg->value);
+            free(cfg);
+        }
+        configlist[i] = NULL;
+    }
+
+    /*
+     * Remove cnofig_t list.
+     */
+    free(configlist);
+    configlist = NULL;
+}
+
+/**
+ * Get a value for a key.
+ *
+ * @param key A target key name.
+ * @param value A pointer to a value storage.
+ * @param siz A size of a value storage.
+ * @return A value or NULL.
+ */
+bool ConfigFile::getValue(char *key, char *value, size_t siz) {
+    /*
+     * Null check.
+     */
+    if (key == NULL) {
+        return false;
+    }
+
+    /*
+     * Search a config_t object from the key.
+     */
+    config_t *p = search(key);
+    if (p == NULL) {
+        return false;
+    }
+
+    /*
+     * Check the storage size.
+     */
+    if (siz <= strlen(p->value)) {
+        return false;
+    }
+
+    /*
+     * Copy the value to the storage.
+     */
+    strcpy(value, p->value);
+    return true;
+}
+
+/**
+ * Set a set of a key and value.
+ *
+ * @param key A key.
+ * @param value A value.
+ *
+ * @return True if it succeed.
+ */
+bool ConfigFile::setValue(char *key, char *value) {
+    /*
+     * Null check.
+     */
+    if ((key == NULL) || (value == NULL)) {
+        return false;
+    }
+
+    /*
+     * Size check.
+     */
+    if ((MAXLEN_KEY < strlen(key)) || (MAXLEN_VALUE < strlen(value))) {
+        return false;
+    }
+
+    /*
+     * Search a config_t object from the key.
+     */
+    config_t *p = search(key);
+    if (p == NULL) {
+        /*
+         * Allocation a memory for a new key.
+         */
+        char *k = (char *)malloc(sizeof(char) * (strlen(key) + 1));
+        if (k == NULL) {
+            return false;
+        }
+        strcpy(k, key);
+
+        /*
+         * Allocation a memory for a new value.
+         */
+        char *v = (char *)malloc(sizeof(char) * (strlen(value) + 1));
+        if (v == NULL) {
+            free(k);
+            return false;
+        }
+        strcpy(v, value);
+
+        /*
+         * Allocation a memory for a new configuration.
+         */
+        config_t *cfg = (config_t *)malloc(sizeof(config_t) * 1);
+        if (cfg == NULL) {
+            free(k);
+            free(v);
+            return false;
+        }
+        cfg->key = k;
+        cfg->value = v;
+
+        /*
+         * Add the new configuration.
+         */
+        if (!add(cfg)) {
+            free(k);
+            free(v);
+            free(cfg);
+            return false;
+        }
+
+        return true;
+    } else {
+        /*
+         * The value is same.
+         */
+        if (strcmp(value, p->value) == 0) {
+            return true;
+        }
+
+        /*
+         * Free a memory for the value.
+         */
+        free(p->value);
+        p->value = NULL;
+
+        /*
+         * Allocation memory for the new value.
+         */
+        char *v = (char *)malloc(sizeof(char) * (strlen(value) + 1));
+        if (v == NULL) {
+            return false;
+        }
+
+        /*
+         * Store it.
+         */
+        strcpy(v, value);
+        p->value = v;
+
+        return true;
+    }
+}
+
+/**
+ * Remove a config.
+ *
+ * @param key A key.
+ *
+ * @return True if it succeed.
+ */
+bool ConfigFile::remove(char *key) {
+    if (key == NULL) {
+        return false;
+    }
+    for (int i = 0; i < MAXCONFIG; i++) {
+        config_t *cfg = configlist[i];
+        if (cfg != NULL) {
+            if (strcmp(cfg->key, key) == 0) {
+                free(cfg->key);
+                free(cfg->value);
+                free(cfg);
+                configlist[i] = NULL;
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
+/**
+ * Remove all config.
+ *
+ * @return True if it succeed.
+ */
+bool ConfigFile::removeAll(void) {
+    for (int i = 0; i < MAXCONFIG; i++) {
+        config_t *p = configlist[i];
+        if (p != NULL) {
+            free(p->key);
+            free(p->value);
+        }
+        free(p);
+        configlist[i] = NULL;
+    }
+    return true;
+}
+
+/**
+ * Get a number of configuration sets.
+ *
+ * @return number of configuration sets.
+ */
+int ConfigFile::getCount() {
+    int cnt = 0;
+    for (int i = 0; i < MAXCONFIG; i++) {
+        config_t *p = configlist[i];
+        if (p != NULL) {
+            cnt++;
+        }
+    }
+    return cnt;
+}
+
+/**
+ * Get a key and a value.
+ *
+ * @param index Index number of this list.
+ * @param key A pointer to a buffer for key.
+ * @param keybufsiz A size of the key buffer.
+ * @param value A pointer to a buffer for value.
+ * @param valuebufsiz A size of the value buffer.
+ *
+ * @return true if it succeed.
+ */
+bool ConfigFile::getKeyAndValue(int index, char *key, size_t keybufsiz, char *value, size_t valuebufsiz) {
+    int cnt = 0;
+    for (int i = 0; i < MAXCONFIG; i++) {
+        config_t *p = configlist[i];
+        if (p != NULL) {
+            if (cnt == index) {
+                if ((strlen(p->key) < keybufsiz) && (strlen(p->value) < valuebufsiz)) {
+                    strcpy(key, p->key);
+                    strcpy(value, p->value);
+                    return true;
+                }
+                return false;
+            }
+            cnt++;
+        }
+    }
+    return false;
+}
+
+/**
+ * Read from the target file.
+ *
+ * @param file A target file name.
+ */
+bool ConfigFile::read(char *file) {
+    /*
+     * Open the target file.
+     */
+    FILE *fp = fopen(file, "r");
+    if (fp == NULL) {
+        return false;
+    }
+
+    /*
+     * Remove all configuration.
+     */
+    removeAll();
+
+    /*
+     * Read from a file.
+     */
+    char buf[MAXLEN_KEY + 8 + MAXLEN_VALUE];
+    while (fgets(buf, sizeof(buf), fp) != NULL) {
+        /*
+         * Ignore a comment.
+         */
+        if (buf[0] == '#') {
+            continue;
+        }
+
+        /*
+         * Trim a return.
+         */
+        const size_t len = strlen(buf);
+        for (int i = 0; i < len; i++) {
+            if ((buf[i] == '\r') || (buf[i] == '\n')) {
+                buf[i] = '\0';
+            }
+        }
+
+        /*
+         * Separate key and value.
+         */
+        char k[MAXLEN_KEY];
+        char v[MAXLEN_VALUE];
+        char *sp = strchr(buf, SEPARATOR);
+        if (sp != NULL) {
+            strcpy(v, sp + 1);
+            *sp = '\0';
+            strcpy(k, buf);
+            setValue(k, v);
+        }
+    }
+    fclose(fp);
+    return true;
+}
+
+/**
+ * Write from the target file.
+ *
+ * @param file A pointer to a file name.
+ * @param header A pointer to a header.
+ * @param ff File format.
+ */
+bool ConfigFile::write(char *file, char *header, FileFormat ff) {
+    /*
+     * Open the target file.
+     */
+    FILE *fp = fopen(file, "w");
+    if (fp == NULL) {
+        return false;
+    }
+
+    /*
+     * Set a type of new line.
+     */
+    char *newline = NEWLINE_UNIX;
+    switch (ff) {
+        case UNIX:
+            newline = NEWLINE_UNIX;
+            break;
+        case MAC:
+            newline = NEWLINE_MAC;
+            break;
+        case DOS:
+            newline = NEWLINE_DOS;
+            break;
+        default:
+            newline = NEWLINE_UNIX;
+            break;
+    }
+
+    /*
+     * Write the header.
+     */
+    if (header != NULL) {
+        fprintf(fp, "%s%s", header, newline);
+    }
+
+    /*
+     * Write the data.
+     */
+    for (int i = 0; i < MAXCONFIG; i++) {
+        config_t *cfg = configlist[i];
+        if (cfg != NULL) {
+            fprintf(fp, "%s=%s%s", cfg->key, cfg->value, newline);
+        }
+    }
+    fclose(fp);
+    return true;
+}
+
+ConfigFile::config_t *ConfigFile::search(char *key) {
+    if (key == NULL) {
+        return NULL;
+    }
+    for (int i = 0; i < MAXCONFIG; i++) {
+        if (configlist[i] != NULL) {
+            if (strcmp(configlist[i]->key, key) == 0) {
+                return configlist[i];
+            }
+        }
+    }
+    return NULL;
+}
+
+bool ConfigFile::add(config_t *cfg) {
+    for (int i = 0; i < MAXCONFIG; i++) {
+        if (configlist[i] == NULL) {
+            configlist[i] = cfg;
+            return true;
+        }
+    }
+    return false;
+}
\ No newline at end of file