Added random generator and hashing library.

src/CMakeLists.txt

@@ -1,7 +1,13 @@
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../lib)
 
-add_library(SDBLib STATIC InputBuffer.c InputBuffer.h SQL.c SQL.h scanner.c scanner.h parser.c parser.h bplus_tree.c bplus_tree.h)
+add_library(SDBLib STATIC
+        InputBuffer.c InputBuffer.h
+        SQL.c SQL.h
+        scanner.c scanner.h
+        parser.c parser.h
+        bplus_tree.c bplus_tree.h
+        ../lib/MurmurHash3.c ../lib/MurmurHash3.h random.c random.h)
 
 add_executable(SDB main.c)
 target_link_libraries(SDB SDBLib)

src/main.c

@@ -4,15 +4,16 @@
 #include <string.h>
 #include <strings.h>
 #include <assert.h>
+#include <time.h>
 
 #include "InputBuffer.h"
 #include "scanner.h"
 #include "parser.h"
-
-#include "bplus_tree.h"
+#include "random.h"
 
 void prompt() {
     printf("SDB> ");
+    fflush(stdout);
 }
 
 void read_input(InputBuffer *buffer) {
@@ -51,14 +52,16 @@ void parse_input(char *input) {
 
     free_scanner(scanner);
     free_parser(parser);
-
 }
 
 int main() {
-    setbuf(stdout, 0);
     setbuf(stderr, 0);
 
     InputBuffer *buffer = input_buffer_new();
+    if (!init_random()) {
+        fprintf(stderr, "Error: failed to init random device\n");
+        exit(EXIT_FAILURE);
+    }
 
     while (true) {
         prompt();
@@ -72,5 +75,6 @@ int main() {
     }
 
     input_buffer_free(buffer);
+    deinit_random();
     return EXIT_SUCCESS;
 }

src/parser.c

@@ -300,7 +300,7 @@ ParserNode *parser_parse(Parser *parser, Scanner *scanner) {
                     }
                         break;
                     default:
-                        parser_set_error(parser, "Unexpected node type", token);
+                        parser_set_error(parser, "Unexpected input, expected start of statement", token);
                         break;
                 }
             }

src/random.c

@@ -0,0 +1,36 @@
+//
+// Created by sam on 12/07/18.
+//
+
+#include <stdio.h>
+#include <assert.h>
+#include "random.h"
+
+FILE * randomFile = NULL;
+bool init_random() {
+    randomFile = fopen("/dev/urandom", "r");
+    return randomFile != NULL;
+}
+bool deinit_random() {
+    int result = 0;
+    if (randomFile != NULL) {
+        result = fclose(randomFile);
+        randomFile = NULL;
+    }
+    return result == 0;
+}
+uint32_t random_32(bool *success) {
+    assert(randomFile != NULL);
+    uint32_t output = 0;
+
+    if (fread(&output, sizeof(uint32_t), 1, randomFile) < 1) {
+        if (success != NULL) {
+            *success = false;
+        }
+        return 0;
+    }
+    if (success != NULL) {
+        *success = true;
+    }
+    return output;
+}

src/random.h

@@ -0,0 +1,15 @@
+//
+// Created by sam on 12/07/18.
+//
+
+#ifndef SDB_RANDOM_H
+#define SDB_RANDOM_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+bool init_random();
+bool deinit_random();
+uint32_t random_32(bool *success);
+
+#endif //SDB_RANDOM_H