From 44a9a3ca464f0bf24b0da2c0a6f106678dc67d52 Mon Sep 17 00:00:00 2001
From: Aryadev Chavali <aryadev@aryadevchavali.com>
Date: Sat, 21 Oct 2023 23:23:37 +0100
Subject: Helper functions for read/write instructions from darr or FILE*

---
 src/inst.c | 37 +++++++++++++++++++++++++++++++++++++
 src/inst.h |  5 +++++
 2 files changed, 42 insertions(+)

diff --git a/src/inst.c b/src/inst.c
index d7edd94..a6347c0 100644
--- a/src/inst.c
+++ b/src/inst.c
@@ -168,6 +168,12 @@ void inst_write_bytecode(inst_t inst, darr_t *darr)
   }
 }
 
+void insts_write_bytecode(inst_t *insts, size_t size, darr_t *darr)
+{
+  for (size_t i = 0; i < size; ++i)
+    inst_write_bytecode(insts[i], darr);
+}
+
 data_t read_type_from_darr(darr_t *darr, data_type_t type)
 {
   switch (type)
@@ -225,3 +231,34 @@ inst_t inst_read_bytecode(darr_t *darr)
 
   return inst;
 }
+
+inst_t *insts_read_bytecode(darr_t *bytes, size_t *ret_size)
+{
+  *ret_size           = 0;
+  darr_t instructions = {0};
+  darr_init(&instructions, 0);
+  while (bytes->used < bytes->available)
+  {
+    inst_t instruction = inst_read_bytecode(bytes);
+    darr_append_bytes(&instructions, (byte *)&instruction, sizeof(instruction));
+  }
+  *ret_size = instructions.used / sizeof(inst_t);
+  return (inst_t *)instructions.data;
+}
+
+void insts_write_bytecode_file(inst_t *instructions, size_t size, FILE *fp)
+{
+  darr_t darr = {0};
+  darr_init(&darr, 0);
+  insts_write_bytecode(instructions, size, &darr);
+  darr_write_file(&darr, fp);
+  free(darr.data);
+}
+
+inst_t *insts_read_bytecode_file(FILE *fp, size_t *ret)
+{
+  darr_t darr          = darr_read_file(fp);
+  inst_t *instructions = insts_read_bytecode(&darr, ret);
+  free(darr.data);
+  return instructions;
+}
diff --git a/src/inst.h b/src/inst.h
index f5ab4ae..f72470c 100644
--- a/src/inst.h
+++ b/src/inst.h
@@ -57,10 +57,15 @@ void inst_print(inst_t, FILE *);
 
 size_t inst_bytecode_size(inst_t);
 void inst_write_bytecode(inst_t, darr_t *);
+void insts_write_bytecode(inst_t *, size_t, darr_t *);
 // Here the dynamic array is a preloaded buffer of bytes, where
 // darr.available is the number of overall bytes and used is the
 // cursor (where we are in the buffer).
 inst_t inst_read_bytecode(darr_t *);
+inst_t *insts_read_bytecode(darr_t *, size_t *);
+
+void insts_write_bytecode_file(inst_t *, size_t, FILE *);
+inst_t *insts_read_bytecode_file(FILE *, size_t *);
 
 #define INST_BPUSH(BYTE) \
   ((inst_t){.opcode = OP_PUSH_BYTE, .operand = DBYTE(BYTE)})
-- 
cgit v1.2.3-13-gbd6f