add basic read syscall wrappers for terminfo db

src/read.c

@@ -0,0 +1,51 @@
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+#include "read.h"
+
+static struct ti_db {
+  const char *restrict const file;
+  // const FILE *restrict const stream;
+  const long size;
+};
+
+/*
+ * Returns 0 on success, else 1 on failure and sets errno.
+ */
+static inline int fsize(FILE *restrict const stream, long *restrict const size,
+          const bool offset) {
+  long initpos = (offset) ? ftell(stream) : 0L;
+
+  if (fseek(stream, 0L, SEEK_END))
+    return 1;
+  *size = ftell(stream);
+  if (offset && fseek(stream, initpos, SEEK_SET))
+    return 1;
+
+  return 0;
+}
+
+/* Read the entire file at once to avoid half a million individual read syscalls.
+ */
+static inline int freaddb(const char *restrict const file, char *restrict *restrict const db,
+            long *restrict const size) {
+  FILE *restrict const stream = fopen(file, "rb");
+  if (fsize(stream, size, false))
+    return 1;
+
+  *db = (char*)malloc(*size);
+  if (fread(*db, *size, 1UL, stream) != *size)
+    return 2;
+
+  return 0;
+}
+
+/*
+ */
+static inline int dbread(char *restrict const db, void *buf, const size_t size) {
+  
+}
+
+int tireadi16() {}

src/read.h

@@ -0,0 +1,6 @@
+#ifndef CURSETREE_READ_H
+#define CURSETREE_READ_H
+
+#include <stdio.h>
+
+#endif /* CURSETREE_READ_H */