Diff: db.cpp

Revision:

3:a3b4d032f48f

Child:

10:da52ff0b93c0

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/db.cpp	Mon Dec 02 20:21:10 2013 +0000
@@ -0,0 +1,112 @@
+#include "mbed.h"
+#include "db.h"
+#include "SDFileSystem.h"
+
+void db_insert_tuple(char *new_name, char *new_code)
+{
+
+    char tuple_code[128];
+    char tuple_name[128];
+    char tuple_id[128];
+    int id = 0;
+
+    // create file if it does not exist
+    FILE *ftemp = fopen("/sd/SmartRemote/db.txt", "a");
+    fclose(ftemp);
+
+    // read file to get last id
+    FILE *fdb = fopen("/sd/SmartRemote/db.txt", "r");
+    while ( !feof(fdb) ) {
+        db_get_tuple(fdb, tuple_id, tuple_name, tuple_code);
+        if (strlen(tuple_name) != 0) {
+            printf("Tuple: |%s| \t |%s| \t |%s|\n", tuple_id, tuple_name, tuple_code);
+            id = atoi(tuple_id);
+        }
+    }
+    fclose(fdb);
+
+    // id of new tuple
+    id++;
+    sprintf(tuple_id, "%d", id);
+
+    // write new tuple to file
+    char new_row[128];
+    FILE *fwrite = fopen("/sd/SmartRemote/db.txt", "a");
+
+    if (fwrite == NULL) {                                                   // if error
+        printf("Could not open file for write\n");
+    }
+    sprintf(new_row, "%s\n%s\n%s\n", tuple_id, new_name, new_code);         // create new row
+
+    fprintf(fwrite, new_row);                                               // write to file
+    fclose(fwrite);                                                         // close file
+
+    printf("Record Added: %s\n", new_row);
+}
+
+void db_print_all(FILE *fread)
+{
+    char c;
+    while ( !feof(fread) ) {
+        c=fgetc(fread);
+        printf("%c", c);
+    }
+}
+
+void db_find_tuple(FILE *fread, int id_to_find, char *tuple_name, char *tuple_code)
+{
+    char tuple_id[128];
+    int id;
+
+    while ( !feof(fread) ) {
+        db_get_tuple(fread, tuple_id, tuple_name, tuple_code);
+        if (strlen(tuple_name) != 0) {
+            id = atoi(tuple_id);
+            if (id == id_to_find) {
+                break;
+            }
+        }
+        else {
+            sprintf(tuple_id, "%d", 0);
+            sprintf(tuple_id, "%s", "");
+            sprintf(tuple_id, "%s", "");
+        }
+    }
+
+    printf("Tuple Found: |%s| \t |%s| \t |%s|\n", tuple_id, tuple_name, tuple_code);
+
+}
+
+void db_get_tuple(FILE *fread, char *id_str, char *name_str, char *code_str)
+{
+
+    unsigned char c;
+    int index;
+
+    // read ID;
+    index = 0;
+    do {
+        c = fgetc(fread);
+        id_str[index] = c;
+        index++;
+    } while (c != '\n' &&  !feof(fread) );
+    id_str[index-1] = 0;
+
+    // read NAME;
+    index = 0;
+    do {
+        c = fgetc(fread);
+        name_str[index] = c;
+        index++;
+    } while (c != '\n' &&  !feof(fread) );
+    name_str[index-1] = 0;
+
+    // read CODE
+    index = 0;
+    do {
+        c = fgetc(fread);
+        code_str[index] = c;
+        index++;
+    } while (c != '\n' &&  !feof(fread) );
+    code_str[index-1] = 0;
+}
\ No newline at end of file