Initial Commit
This commit is contained in:
24
src/InputBuffer.c
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24
src/InputBuffer.c
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@@ -0,0 +1,24 @@
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//
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// Created by Sam on 15/05/2018.
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//
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#include "InputBuffer.h"
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InputBuffer* input_buffer_new() {
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InputBuffer* buffer = malloc(sizeof(InputBuffer));
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buffer->buffer = NULL;
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buffer->bufferLength = 0;
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buffer->inputLength = 0;
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return buffer;
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}
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void input_buffer_free(InputBuffer* buffer) {
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if (buffer->buffer != NULL) {
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free(buffer->buffer);
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}
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buffer->buffer = NULL;
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buffer->inputLength = 0;
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buffer->bufferLength = 0;
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free(buffer);
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}
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22
src/InputBuffer.h
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22
src/InputBuffer.h
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@@ -0,0 +1,22 @@
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//
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// Created by Sam on 15/05/2018.
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//
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#ifndef SDB_INPUTBUFFER_H
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#define SDB_INPUTBUFFER_H
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#include <stddef.h>
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#include <sys/types.h>
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#include <malloc.h>
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struct InputBuffer_t {
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char* buffer;
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size_t bufferLength;
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ssize_t inputLength;
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};
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typedef struct InputBuffer_t InputBuffer;
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InputBuffer* input_buffer_new();
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void input_buffer_free(InputBuffer* buffer);
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#endif //SDB_INPUTBUFFER_H
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291
src/SQL.c
Normal file
291
src/SQL.c
Normal file
@@ -0,0 +1,291 @@
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//
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// Created by Sam on 19/05/2018.
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//
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#include <malloc.h>
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#include "SQL.h"
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T_Value *new_t_value() {
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T_Value *value = malloc(sizeof(T_Value));
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value->number = 0;
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value->string = NULL;
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return value;
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}
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void free_t_value(T_Value *value) {
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if (value->string != NULL) {
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free(value->string);
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}
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free(value);
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}
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T_Assignment *new_t_assignment() {
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T_Assignment *assignment = malloc(sizeof(T_Assignment));
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assignment->value = NULL;
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assignment->identifier = NULL;
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}
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void free_t_assignment(T_Assignment *assignment) {
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if (assignment->identifier != NULL) {
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free(assignment->identifier);
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}
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if (assignment->value != NULL) {
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free(assignment->value);
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}
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free(assignment);
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}
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T_AssignmentList *new_t_assignment_list() {
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T_AssignmentList *assignmentList = malloc(sizeof(T_AssignmentList));
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assignmentList->assignments = NULL;
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assignmentList->length = 0;
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return assignmentList;
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}
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void free_t_assignment_list(T_AssignmentList *assignmentList) {
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if (assignmentList->length > 0) {
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for (size_t i = 0; i < assignmentList->length; i++) {
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free_t_assignment(assignmentList->assignments[i]);
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}
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free(assignmentList->assignments);
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assignmentList->length = 0;
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}
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free(assignmentList);
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}
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void append_t_assignment_list(T_AssignmentList *list, T_Assignment *assignment) {
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list->length++;
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list->assignments = realloc(list->assignments, sizeof(T_Assignment) * list->length);
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list->assignments[list->length - 1] = assignment;
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}
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T_FieldList *new_t_field_list() {
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T_FieldList *list = malloc(sizeof(T_FieldList));
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list->length = 0;
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list->fields = NULL;
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return list;
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}
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void free_t_field_list(T_FieldList *list) {
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if (list->length > 0) {
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for (size_t i = 0; i < list->length; i++) {
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free(list->fields[i]);
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}
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free(list->fields);
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list->length = 0;
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list->fields = NULL;
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}
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free(list);
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}
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void append_t_field_list(T_FieldList *list, char *field) {
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list->length++;
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list->fields = realloc(list->fields, sizeof(char *) * list->length);
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list->fields[list->length - 1] = field;
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}
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T_ColumnSpec *new_t_column_spec() {
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T_ColumnSpec *spec = malloc(sizeof(T_ColumnSpec));
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spec->identifier = NULL;
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spec->option = COLOPT_NONE;
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spec->size = 0;
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spec->type = COLTYPE_NONE;
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return spec;
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}
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void free_t_column_spec(T_ColumnSpec *spec) {
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if (spec->identifier != NULL) {
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free(spec->identifier);
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}
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free(spec);
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}
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T_ColumnSpecList *new_t_column_spec_list() {
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T_ColumnSpecList *list = malloc(sizeof(T_ColumnSpecList));
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list->length = 0;
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list->columns = NULL;
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return list;
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}
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void free_t_column_spec_list(T_ColumnSpecList *list) {
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if (list->length > 0) {
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for (size_t i = 0; i < list->length; i++) {
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free_t_column_spec(list->columns[i]);
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}
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free(list->columns);
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list->columns = NULL;
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list->length = 0;
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}
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free(list);
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}
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void append_t_column_spec_list(T_ColumnSpecList *list, T_ColumnSpec *spec) {
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list->length++;
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list->columns = realloc(list->columns, sizeof(T_ColumnSpec) * list->length);
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list->columns[list->length - 1] = spec;
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}
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T_SelectStmt *new_t_select_stmt() {
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T_SelectStmt *stmt = malloc(sizeof(T_SelectStmt));
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stmt->fields = NULL;
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stmt->tableName = NULL;
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stmt->where = NULL;
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return stmt;
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}
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void free_t_select_stmt(T_SelectStmt *stmt) {
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if (stmt->where != NULL) {
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free_t_assignment_list(stmt->where);
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}
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if (stmt->tableName != NULL) {
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free(stmt->tableName);
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}
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if (stmt->fields != NULL) {
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free_t_field_list(stmt->fields);
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}
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free(stmt);
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}
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T_InsertStmt *new_t_insert_stmt() {
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T_InsertStmt *stmt = malloc(sizeof(T_InsertStmt));
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stmt->tableName = NULL;
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stmt->values = NULL;
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return stmt;
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}
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void free_t_insert_stmt(T_InsertStmt *stmt) {
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if (stmt->values != NULL) {
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free_t_assignment_list(stmt->values);
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}
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if (stmt->tableName != NULL) {
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free(stmt->tableName);
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}
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free(stmt);
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}
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T_UpdateStmt *new_t_update_stmt() {
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T_UpdateStmt *stmt = malloc(sizeof(T_UpdateStmt));
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stmt->tableName = NULL;
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stmt->values = NULL;
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stmt->where = NULL;
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return stmt;
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}
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void free_t_update_stmt(T_UpdateStmt *stmt) {
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if (stmt->tableName != NULL) {
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free(stmt->tableName);
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}
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if (stmt->where != NULL) {
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free_t_assignment_list(stmt->where);
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}
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if (stmt->values != NULL) {
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free_t_assignment_list(stmt->values);
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}
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free(stmt);
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}
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T_DeleteStmt *new_t_delete_stmt() {
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T_DeleteStmt *stmt = malloc(sizeof(T_DeleteStmt));
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stmt->tableName = NULL;
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stmt->where = NULL;
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}
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void free_t_delete_stmt(T_DeleteStmt *stmt) {
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if (stmt->tableName != NULL) {
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free(stmt->tableName);
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}
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if (stmt->where != NULL) {
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free_t_assignment_list(stmt->where);
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}
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free(stmt);
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}
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T_CreateStmt *new_t_create_stmt() {
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T_CreateStmt *spec = malloc(sizeof(T_CreateStmt));
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spec->tableName = NULL;
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spec->columns = NULL;
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return spec;
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}
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void free_t_create_stmt(T_CreateStmt *spec) {
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if (spec->tableName != NULL) {
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free(spec->tableName);
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}
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if (spec->columns != NULL) {
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free_t_column_spec_list(spec->columns);
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}
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free(spec);
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}
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T_DropStmt *new_t_drop_stmt() {
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T_DropStmt *stmt = malloc(sizeof(T_DropStmt));
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stmt->tableName = NULL;
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return stmt;
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}
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void free_t_drop_stmt(T_DropStmt *stmt) {
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if (stmt->tableName != NULL) {
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free(stmt->tableName);
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}
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free(stmt);
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}
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T_Statement *new_t_statement() {
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T_Statement *stmt = malloc(sizeof(T_Statement));
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stmt->type = STMT_NONE;
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stmt->stmt = NULL;
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return stmt;
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}
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void free_t_statement(T_Statement *stmt) {
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switch (stmt->type) {
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case STMT_SELECT:
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free_t_select_stmt(stmt->stmt);
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break;
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case STMT_INSERT:
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free_t_insert_stmt(stmt->stmt);
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break;
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case STMT_UPDATE:
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free_t_update_stmt(stmt->stmt);
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break;
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case STMT_DELETE:
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free_t_delete_stmt(stmt->stmt);
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break;
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case STMT_CREATE:
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free_t_create_stmt(stmt->stmt);
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break;
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case STMT_DROP:
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free_t_drop_stmt(stmt->stmt);
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break;
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default:
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break;
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}
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stmt->stmt = NULL;
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stmt->type = STMT_NONE;
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free(stmt);
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}
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T_StatementList *new_t_statement_list() {
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T_StatementList *list = malloc(sizeof(T_StatementList));
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list->length = 0;
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list->statements = NULL;
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return list;
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}
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void free_t_statement_list(T_StatementList *list) {
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if (list->length > 0) {
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for (size_t i = 0; i < list->length; i++) {
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free_t_statement(list->statements[i]);
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}
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free(list->statements);
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list->statements = NULL;
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list->length = 0;
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}
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free(list);
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}
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void append_t_statement_list(T_StatementList *list, T_Statement *statement) {
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list->length++;
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list->statements = realloc(list->statements, sizeof(T_Statement) * list->length);
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list->statements[list->length - 1] = statement;
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}
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185
src/SQL.h
Normal file
185
src/SQL.h
Normal file
@@ -0,0 +1,185 @@
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//
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// Created by Sam on 19/05/2018.
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//
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#ifndef SDB_SQL_H
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#define SDB_SQL_H
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#include <stddef.h>
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union T_Value_t {
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char *string;
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int number;
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};
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typedef union T_Value_t T_Value;
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T_Value *new_t_value();
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void free_t_value(T_Value *value);
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struct T_Assignment_t {
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char *identifier;
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T_Value *value;
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};
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typedef struct T_Assignment_t T_Assignment;
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T_Assignment *new_t_assignment();
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void free_t_assignment(T_Assignment *assignment);
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struct T_AssignmentList_t {
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T_Assignment **assignments;
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size_t length;
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};
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typedef struct T_AssignmentList_t T_AssignmentList;
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T_AssignmentList *new_t_assignment_list();
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void free_t_assignment_list(T_AssignmentList *assignmentList);
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void append_t_assignment_list(T_AssignmentList *list, T_Assignment *assignment);
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struct T_FieldList_t {
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char **fields;
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size_t length;
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};
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typedef struct T_FieldList_t T_FieldList;
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T_FieldList *new_t_field_list();
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void free_t_field_list(T_FieldList *list);
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void append_t_field_list(T_FieldList *list, char *field);
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enum T_ColumnOption_t {
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COLOPT_NONE = 0,
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COLOPT_INDEX = 1
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};
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typedef enum T_ColumnOption_t T_ColumnOption;
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enum T_ColumnType_t {
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COLTYPE_NONE,
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COLTYPE_STRING,
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COLTYPE_INT
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};
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typedef enum T_ColumnType_t T_ColumnType;
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struct T_ColumnSpec_t {
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char *identifier;
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T_ColumnType type;
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size_t size;
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T_ColumnOption option;
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};
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typedef struct T_ColumnSpec_t T_ColumnSpec;
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T_ColumnSpec *new_t_column_spec();
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void free_t_column_spec(T_ColumnSpec *spec);
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struct T_ColumnSpecList_t {
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T_ColumnSpec **columns;
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size_t length;
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};
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typedef struct T_ColumnSpecList_t T_ColumnSpecList;
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T_ColumnSpecList *new_t_column_spec_list();
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void free_t_column_spec_list(T_ColumnSpecList *list);
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void append_t_column_spec_list(T_ColumnSpecList *list, T_ColumnSpec *spec);
|
||||
|
||||
struct T_SelectStmt_t {
|
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T_FieldList *fields;
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||||
char *tableName;
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||||
T_AssignmentList *where;
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||||
};
|
||||
typedef struct T_SelectStmt_t T_SelectStmt;
|
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|
||||
T_SelectStmt *new_t_select_stmt();
|
||||
|
||||
void free_t_select_stmt(T_SelectStmt *stmt);
|
||||
|
||||
struct T_InsertStmt_t {
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||||
char *tableName;
|
||||
T_AssignmentList *values;
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||||
};
|
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typedef struct T_InsertStmt_t T_InsertStmt;
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|
||||
T_InsertStmt *new_t_insert_stmt();
|
||||
|
||||
void free_t_insert_stmt(T_InsertStmt *stmt);
|
||||
|
||||
struct T_UpdateStmt_t {
|
||||
char *tableName;
|
||||
T_AssignmentList *values;
|
||||
T_AssignmentList *where;
|
||||
};
|
||||
typedef struct T_UpdateStmt_t T_UpdateStmt;
|
||||
|
||||
T_UpdateStmt *new_t_update_stmt();
|
||||
|
||||
void free_t_update_stmt(T_UpdateStmt *stmt);
|
||||
|
||||
struct T_DeleteStmt_t {
|
||||
char *tableName;
|
||||
T_AssignmentList *where;
|
||||
};
|
||||
typedef struct T_DeleteStmt_t T_DeleteStmt;
|
||||
|
||||
T_DeleteStmt *new_t_delete_stmt();
|
||||
|
||||
void free_t_delete_stmt(T_DeleteStmt *stmt);
|
||||
|
||||
struct T_CreateStmt_t {
|
||||
char *tableName;
|
||||
T_ColumnSpecList *columns;
|
||||
};
|
||||
typedef struct T_CreateStmt_t T_CreateStmt;
|
||||
|
||||
T_CreateStmt *new_t_create_stmt();
|
||||
|
||||
void free_t_create_stmt(T_CreateStmt *spec);
|
||||
|
||||
struct T_DropStmt_t {
|
||||
char *tableName;
|
||||
};
|
||||
typedef struct T_DropStmt_t T_DropStmt;
|
||||
|
||||
T_DropStmt *new_t_drop_stmt();
|
||||
|
||||
void free_t_drop_stmt(T_DropStmt *stmt);
|
||||
|
||||
enum T_StatementType_t {
|
||||
STMT_NONE = 0,
|
||||
STMT_SELECT,
|
||||
STMT_INSERT,
|
||||
STMT_UPDATE,
|
||||
STMT_DELETE,
|
||||
STMT_CREATE,
|
||||
STMT_DROP
|
||||
};
|
||||
typedef enum T_StatementType_t T_StatementType;
|
||||
|
||||
struct T_Statement_t {
|
||||
T_StatementType type;
|
||||
void *stmt;
|
||||
};
|
||||
typedef struct T_Statement_t T_Statement;
|
||||
|
||||
T_Statement *new_t_statement();
|
||||
|
||||
void free_t_statement(T_Statement *stmt);
|
||||
|
||||
struct T_StatementList_t {
|
||||
T_Statement **statements;
|
||||
size_t length;
|
||||
};
|
||||
typedef struct T_StatementList_t T_StatementList;
|
||||
|
||||
T_StatementList *new_t_statement_list();
|
||||
|
||||
void free_t_statement_list(T_StatementList *list);
|
||||
|
||||
void append_t_statement_list(T_StatementList *list, T_Statement *statement);
|
||||
|
||||
#endif //SDB_SQL_H
|
||||
40
src/main.c
Normal file
40
src/main.c
Normal file
@@ -0,0 +1,40 @@
|
||||
#include <stdio.h>
|
||||
#include <stdbool.h>
|
||||
#include <mem.h>
|
||||
|
||||
#include "InputBuffer.h"
|
||||
|
||||
void prompt() {
|
||||
printf("SDB> ");
|
||||
}
|
||||
|
||||
void readInput(InputBuffer *buffer) {
|
||||
ssize_t read = getline(&buffer->buffer, &buffer->bufferLength, stdin);
|
||||
|
||||
if (read <= 0) {
|
||||
printf("Failed to read input\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
//Remove newline
|
||||
buffer->inputLength = read - 1;
|
||||
buffer->buffer[read - 1] = 0;
|
||||
}
|
||||
|
||||
int main() {
|
||||
InputBuffer *buffer = input_buffer_new();
|
||||
|
||||
while (true) {
|
||||
prompt();
|
||||
readInput(buffer);
|
||||
|
||||
if (strcmpi(buffer->buffer, ".exit") == 0) {
|
||||
break;
|
||||
} else {
|
||||
printf("Unknown Command or Query\n");
|
||||
}
|
||||
}
|
||||
|
||||
input_buffer_free(buffer);
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
Reference in New Issue
Block a user