Diff: ConfigFile.cpp

Revision:

0:6b4ba48753b9

Child:

1:f02e081afe42

diff -r 000000000000 -r 6b4ba48753b9 ConfigFile.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ConfigFile.cpp	Sun Sep 12 07:11:54 2010 +0000
@@ -0,0 +1,276 @@
+#include "ConfigFile.h"
+
+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;
+    }
+}
+
+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;
+}
+
+char *ConfigFile::getValue(char *key) {
+    /*
+     * Null check.
+     */
+    if (key == NULL) {
+        return NULL;
+    }
+
+    /*
+     * Search a config_t object from the key.
+     */
+    config_t *p = search(key);
+    if (p == NULL) {
+        return NULL;
+    }
+
+    /*
+     * Return the value.
+     */
+    return p->value;
+}
+
+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;
+    }
+}
+
+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;
+}
+
+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;
+}
+
+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;
+}
+
+bool ConfigFile::write(char *file) {
+    FILE *fp = fopen(file, "w");
+    if (fp == NULL) {
+        return false;
+    }
+
+    static const char *NEWLINE_UNIX = "\n";
+    static const char *NEWLINE_DOS = "\r\n";
+    static const char *NEWLINE_MAC = "\r";
+    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_UNIX);
+        }
+    }
+    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;
+}
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