From 2bbc3d647b263b2295f88e1aef51518bdeee5d1b Mon Sep 17 00:00:00 2001
From: LeonardoBizzoni <leo2002714@gmail.com>
Date: Mon, 6 Oct 2025 18:41:16 +0200
Subject: [PATCH] beginning of code generation extra library

---
 extra/code_generation.h | 58 +++++++++++++++++++++++++++++++++++++++++
 extra/linear_algebra.h  | 22 ++++++++++++++++
 2 files changed, 80 insertions(+)
 create mode 100644 extra/code_generation.h
 create mode 100644 extra/linear_algebra.h

diff --git a/extra/code_generation.h b/extra/code_generation.h
new file mode 100644
index 0000000..9d7e37c
--- /dev/null
+++ b/extra/code_generation.h
@@ -0,0 +1,58 @@
+#ifndef CBUILD_EXTRA_CODE_GENERATION_H
+#define CBUILD_EXTRA_CODE_GENERATION_H
+
+typedef struct {
+  char **values;
+  size_t count;
+  size_t capacity;
+  size_t total_length;
+
+  bool has_args;
+} CB_Generator;
+
+// ======================================================================
+// Implementations
+static void cb_gen_write(CB_Generator *gen, char *filepath, bool append_mode) {
+  CB_Handle file = cb_handle_open(filepath, append_mode
+                                            ? CB_AccessFlag_Append
+                                            : CB_AccessFlag_Write);
+  char *full_string = malloc(gen->total_length + 1);
+  memset(full_string, 0, gen->total_length + 1);
+  for (size_t i = 0; i < gen->count; ++i) {
+    strcat(full_string, gen->values[i]);
+  }
+  cb_handle_write(file, full_string);
+  free(full_string);
+  cb_handle_close(file);
+  cb_dyn_free(gen);
+  gen->has_args = false;
+}
+
+static void cb_gen_push(CB_Generator *gen, char *string) {
+  cb_dyn_push(gen, string);
+  gen->total_length += strlen(string);
+}
+
+static void cb_gen_sig_begin(CB_Generator *gen, char *signature_no_args) {
+  cb_gen_push(gen, cb_format("%s(", signature_no_args));
+}
+
+static void cb_gen_sig_arg(CB_Generator *gen, char *argument) {
+  if (gen->has_args) {
+    cb_gen_push(gen, ", ");
+  }
+  gen->has_args = true;
+  cb_gen_push(gen, argument);
+}
+
+static void cb_gen_sig_end(CB_Generator *gen, bool implementation) {
+  if (!gen->has_args) {
+    cb_gen_push(gen, "void");
+  }
+  cb_gen_push(gen, ")");
+  if (!implementation) {
+    cb_gen_push(gen, ";\n");
+  }
+}
+
+#endif
diff --git a/extra/linear_algebra.h b/extra/linear_algebra.h
new file mode 100644
index 0000000..4513b12
--- /dev/null
+++ b/extra/linear_algebra.h
@@ -0,0 +1,22 @@
+#ifndef CBUILD_EXTRA_LINEAR_ALGEBRA_H
+#define CBUILD_EXTRA_LINEAR_ALGEBRA_H
+
+static void cb_linagen_define_vecn(CB_Generator *gen, char *type,
+                                   char *suffix, int32_t n) {
+  cb_gen_push(gen, cb_format("typedef union {"
+                             "\n  %s values[%d];"
+                             "\n  struct {",
+                             type, n));
+  for (int32_t i = 0; i < n; ++i) {
+    char *prefix = " ";
+    if (i % 4 == 0) {
+      prefix = "\n    ";
+    }
+    cb_gen_push(gen, cb_format("%s%s _%d;", prefix, type, i));
+  }
+  cb_gen_push(gen, cb_format("\n  };"
+                             "\n} Vec%d%s;\n\n",
+                             n, suffix));
+}
+
+#endif
-- 
2.52.0