Direct database side of things implemented

src/db_column.h

@@ -0,0 +1,93 @@
+#ifndef H__DB_COLUMN__
+#define H__DB_COLUMN__
+
+#include <stdint.h>
+#include <mysql.h>
+#include "db_connection.h"
+
+enum e_column_type {
+  TYPE_BOOL,
+  TYPE_INT8,
+  TYPE_UINT8,
+  TYPE_INT16,
+  TYPE_UINT16,
+  TYPE_INT32,
+  TYPE_UINT32,
+  TYPE_INT64,
+  TYPE_UINT64,
+  TYPE_FLOAT,
+  TYPE_DOUBLE,
+  TYPE_STRING,
+  TYPE_BLOB,
+  TYPE_TIMESTAMP,
+  TYPE_RAW
+};
+
+struct column_data_t {
+  char *name;
+  size_t name_size;
+
+  enum e_column_type type;
+  size_t type_bytes;
+
+  size_t n_values;
+
+  uint8_t hasPointers :1;
+  uint8_t isNullable  :1;
+  uint8_t isBlob      :1;
+  uint8_t isTimestamp :1;
+
+  union u_data {
+    void *vptr;
+
+    int8_t *ptr_int8;
+    uint8_t *ptr_uint8;
+
+    int16_t *ptr_int16;
+    uint16_t *ptr_uint16;
+
+    int32_t *ptr_int32;
+    uint32_t *ptr_uint32;
+
+    int64_t *ptr_int64;
+    uint64_t *ptr_uint64;
+
+    float *ptr_float;
+    double *ptr_double;
+
+    char **ptr_str;
+  } data;
+  size_t *data_sizes;
+
+  uint8_t *nulls;
+};
+
+
+// Null column value handling - maybe convert these to macros?
+static inline int columnRowIsNull(struct column_data_t *col, uint64_t row)
+{
+  return col->isNullable && (*(col->nulls + (row / 8)) & (1 << (row % 8))) > 0;
+}
+static inline void columnRowSetNull(struct column_data_t *col, uint64_t row)
+{
+  if (col->isNullable) {
+    *(col->nulls + (row / 8)) |= (1 << (row % 8));
+  }
+}
+static inline void columnRowClearNull(struct column_data_t *col, uint64_t row)
+{
+  if (col->isNullable) {
+    *(col->nulls + (row / 8)) &= ~(1 << (row % 8));
+  }
+}
+
+
+struct column_data_t *columnFromResult(struct stored_conn_t *sconn, MYSQL_RES *result,
+                                       uint64_t num_rows);
+void freeColumn(struct column_data_t *col);
+void freeColumns(struct column_data_t **col_data, size_t n_cols);
+
+
+int setColumnValue(struct column_data_t *col, uint64_t row, const char *value, size_t value_size);
+
+#endif // H__DB_COLUMN__