converts to ternary

Makefile

@@ -1,7 +1,7 @@
 CC=gcc
 CFLAGS= -c -g -Wall
 
-LDLIBS = -lcurl -lcjson -lsqlite3
+LDLIBS = -lcurl -lcjson -lsqlite3 -lm
 
 TARGET := isbn-lookup
 

src/db.c

@@ -1,7 +1,9 @@
 #include <stdlib.h>
 #include <stdio.h>
+#include <stdbool.h>
 #include <sqlite3.h>
 #include <string.h>
+#include <math.h>
 
 #include "include/db.h"
 
@@ -40,7 +42,7 @@ void setup_db(sqlite3* db)
 	err = sqlite3_exec(db,
 			"CREATE TABLE IF NOT EXISTS books (id UNSIGNED INT PRIMARY KEY, \
 			title TEXT, subtitle TEXT, isbn TEXT, authors TEXT, subjects TEXT, \
-			langs TEXT, date_added TEXT, date_completed TEXT, pub_date TEXT, \
+			langs TEXT, date_added TEXT, pub_date TEXT, \
 			image_code TEXT, year_of_pub YEAR, page_len UNSIGNED INT);",
 			0, 0, &err_buf);
 	if (err != SQLITE_OK) {
@@ -53,18 +55,113 @@ void setup_db(sqlite3* db)
 	sqlite3_close(db);
 }
 
-#define INSERT_STR "INSERT INTO books (id, title, subtitle, isbn, authors, subjects, langs, date_added, date_completed, pub_date, image_code, year_of_pub, page_len) VALUES("
+static void add_str_entry(char** dst, char** src, bool last)
+{
+	size_t len;
+	len = strlen(*src) + strlen(*dst) + 2 + 1 + (last ? 0 : 2);
+
+	*dst = realloc(*dst, sizeof(char) * len);
+
+	*dst = strcat(*dst, "\"");
+	*dst = strcat(*dst, *src);
+	*dst = strcat(*dst, "\"");
+	if (!last)
+		*dst = strcat(*dst, ", ");
+}
+
+static void add_int_entry(char** dst, int src, bool last)
+{
+	size_t len_int, len;
+	char* num;
+
+	len_int = (src == 0) ? 1 : floor(log10(abs(src))) + 1;
+
+	num = malloc(sizeof(char) * (len_int + 1));
+	snprintf(num, len_int + 1, "%d", src);
+
+	len = strlen(*dst) + len_int + 1 + (last ? 0 : 2);
+	*dst = realloc(*dst, sizeof(char) * len);
+	*dst = strcat(*dst, num);
+
+	if (!last)
+		strcat(*dst, ", ");
+
+	free(num);
+}
+
+static void string_cat_vals(char** dst, book_t* book, int id)
+{
+	add_int_entry(dst, id, false);
+	add_str_entry(dst, &(book->title), false);
+	add_str_entry(dst, &(book->subtitle), false);
+	add_str_entry(dst, &(book->isbn), false);
+	add_str_entry(dst, &(book->authors), false);
+	add_str_entry(dst, &(book->subjects), false);
+	add_str_entry(dst, &(book->langs), false);
+	add_str_entry(dst, &(book->date_added), false);
+	add_str_entry(dst, &(book->pub_date), false);
+	add_str_entry(dst, &(book->image_code), false);
+	add_int_entry(dst, book->page_len, true);
+
+	*dst = realloc(*dst, sizeof(char) * (strlen(*dst) + 3));
+	strcat(*dst, ");");
+}
+
+#define INSERT_STR "INSERT INTO books (id, title, subtitle, isbn, authors, subjects, langs, date_added, pub_date, image_code, page_len) VALUES("
 
 void add_to_db(book_t* book, sqlite3* db)
 {
-	int id;
+	int id, err;
 	char* cmd;
+	char* err_msg = 0;
 
 	open_db(&db);
 
-	id = get_num_rows(db) + 1;
+	id = get_num_rows(db) + 4;
 	
 	cmd = malloc(sizeof(char) * (strlen(INSERT_STR) + 1));
-	snprintf(cmd, strlen(INSERT_STR), "%s", INSERT_STR);
-	
+	snprintf(cmd, strlen(INSERT_STR) + 1, "%s", INSERT_STR);
+
+	string_cat_vals(&cmd, book, id);
+
+	printf("%s\n", cmd);
+
+	err = sqlite3_exec(db, cmd, 0, 0, &err_msg);
+	if (err != SQLITE_OK) {
+		fprintf(stderr, "sqlite3_exec: %s\n", err_msg);
+		sqlite3_free(err_msg);
+		sqlite3_close(db);
+		exit(EXIT_FAILURE);
+	}
+
+	sqlite3_close(db);
+	free(cmd);
 }
+#undef INSERT_STR
+
+#define DEL_STR "DELETE FROM books WHERE id = "
+void remove_from_db(int id, sqlite3* db)
+{
+	int err;
+	char *cmd, *err_msg;
+
+	open_db(&db);
+
+	cmd = malloc(sizeof(char) * (strlen(DEL_STR) + 1));
+	snprintf(cmd, strlen(DEL_STR), "%s", DEL_STR);
+
+	add_int_entry(&cmd, id, true);
+
+	err = sqlite3_exec(db, cmd, 0, 0, &err_msg);
+	if (err != SQLITE_OK) {
+		fprintf(stderr, "sqlite3_exec: %s\n", err_msg);
+		sqlite3_free(err_msg);
+		sqlite3_close(db);
+		exit(EXIT_FAILURE);
+	}
+
+	sqlite3_close(db);
+	free(cmd);
+}
+
+#undef DEL_STR

src/include/db.h

@@ -9,11 +9,14 @@ typedef struct {
 	char *date_added, *pub_date;
 	char *image_code;
 
-	int year_of_pub, page_len;
+	int page_len;
 } book_t;
 
 void setup_db(sqlite3* db);
 
 void add_to_db(book_t* book, sqlite3* db);
 
+void remove_from_db(int id, sqlite3* db);
+
+
 #endif

src/main.c

@@ -4,6 +4,7 @@
 #include <stdbool.h>
 
 #include "include/curl.h"
+#include "include/db.h"
 #include "include/json.h"
 
 struct flags {
@@ -69,6 +70,7 @@ int main(int argc, char* argv[])
 	init_flags(&flags);
 	argp_parse(&argp, argc, argv, 0, 0, &flags);
 
+	/*
 	//book_api_call("9780762437818", &resp);
 	book_api_call(flags.isbn, &resp);
 
@@ -81,8 +83,28 @@ int main(int argc, char* argv[])
 	if (flags.json)
 		json_out(&query);
 	else
-	 	// db out;
+	 	;	// db out;
+	*/
 
+	book_t book;
+
+	book.title = "hi";
+	book.subtitle = "test";
+	book.isbn = "1234";
+	book.authors = "test";
+	book.subjects = "test";
+	book.langs = "eng";
+	book.date_added = "test";
+	book.pub_date = "test";
+	book.image_code = "test";
+
+	book.page_len = 1;
+
+	sqlite3* db;
+
+	setup_db(db);
+
+	add_to_db(&book, db);
 
 	
 	return 0;