TCC Patch Enabling File Inclusion via HTTPS using CURL, Modified from @rexim's Patch

Make-tinycc-possible-to-include-files-over-https.patch

From e312c2984445891e2961384bb98e31ddc4816027 Mon Sep 17 00:00:00 2001
From: 13m0n4de <136407746+13m0n4de@users.noreply.github.com>
Date: Sat, 17 Feb 2024 22:39:17 +0800
Subject: [PATCH] Make it possible to include files over https

The original patch no longer works on the latest TCC, so I created this one.
Additionally, I modified it to download the header files to the same directory as the source code.
---
 Makefile |  2 +-
 tcc.c    |  7 +++++++
 tccpp.c  | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 60 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 98f01e49..36f0c030 100644
--- a/Makefile
+++ b/Makefile
@@ -39,7 +39,7 @@ ifdef CONFIG_WIN32
  NATIVE_TARGET = $(ARCH)-win$(if $(findstring arm,$(ARCH)),ce,32)
 else
  CFG = -unx
- LIBS+=-lm
+ LIBS+=-lm -lcurl
  ifneq ($(CONFIG_ldl),no)
   LIBS+=-ldl
  endif
diff --git a/tcc.c b/tcc.c
index f5cd1d8e..7bac6fe4 100644
--- a/tcc.c
+++ b/tcc.c
@@ -19,6 +19,7 @@
  */

 #include "tcc.h"
+#include <curl/curl.h>
 #if ONE_SOURCE
 # include "libtcc.c"
 #endif
@@ -291,6 +292,10 @@ redo:
     if (opt < 0)
         return 1;

+    if (curl_global_init(CURL_GLOBAL_DEFAULT) != 0) {
+        tcc_error_noabort("Could not initialize Global cURL context. (Yes, your C compiler is using curl Kappa)");
+    }
+
     if (n == 0) {
         if (opt == OPT_HELP) {
             fputs(help, stdout);
@@ -399,6 +404,8 @@ redo:
         }
     }

+    curl_global_cleanup();
+
     if (done && 0 == t && 0 == ret && s->do_bench)
         tcc_print_stats(s, end_time - start_time);

diff --git a/tccpp.c b/tccpp.c
index 5a09a27e..9fbfb725 100644
--- a/tccpp.c
+++ b/tccpp.c
@@ -18,6 +18,7 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */

+#include <curl/curl.h>
 #define USING_GLOBALS
 #include "tcc.h"

@@ -1409,6 +1410,57 @@ static int parse_include(TCCState *s1, int do_next, int test)
 #endif
             return 1;
         }
+
+        // Hacked by https://github.com/13m0n4de
+        // Original patch: https://gist.github.com/rexim/a6636976d12f67ea530ece118a700317
+        // Available to everyone under Public Domain
+        if (strncmp("https://", name, 8) == 0) {
+            CURLU *url = curl_url();
+            if (curl_url_set(url, CURLUPART_URL, name, 0)) {
+                tcc_error("Could not parse the include URL '%s'", name);
+            }
+
+            char *path;
+            if (curl_url_get(url, CURLUPART_PATH, &path, 0)) {
+                tcc_error("Could not extract path from the include URL '%s'", name);
+            }
+
+            curl_url_cleanup(url);
+
+            // Download to the same directory as the source file
+            // ```c title='main.c'
+            // #include <https://example.com/header.h>
+            // ```
+            // After running `tcc /path/to/source/main.c`,
+            // the header file will be downloaded as `/path/to/source/header.h`
+            p = file->true_filename;                        // "/path/to/source/main.c"
+            pstrncpy(buf, p, tcc_basename(p) - p);          // "/path/to/source/"
+            pstrcat(buf, sizeof buf, tcc_basename(path));   // "/path/to/source/header.h"
+
+            curl_free(path);
+
+            CURL *curl = curl_easy_init();
+            if (curl == NULL) {
+                tcc_error("Could not initialize cURL context");
+            }
+
+            FILE *download_file = fopen(buf, "w");
+            if (download_file == NULL) {
+                tcc_error("Could not open file '%s': %s", buf, strerror(errno));
+            }
+
+            curl_easy_setopt(curl, CURLOPT_URL, name);
+            curl_easy_setopt(curl, CURLOPT_WRITEDATA, download_file);
+            CURLcode res = curl_easy_perform(curl);
+            if (res != CURLE_OK) {
+                tcc_error("Could not download '%s': %s", name, curl_easy_strerror(res));
+            }
+
+            curl_easy_cleanup(curl);
+            fclose(download_file);
+        }
+
+
         if (tcc_open(s1, buf) >= 0)
             break;
     }
--
2.43.0

It should be able to work at least on the latest repository (for now): https://github.com/TinyCC/tinycc/tree/7d1bbc80d4978c128b8ebead42485d7a79624dcd

Original Patch: https://gist.github.com/rexim/a6636976d12f67ea530ece118a700317
Video: https://www.youtube.com/watch?v=4vSyqK3SK-0

I also made one for Chibicc: https://gist.github.com/13m0n4de/f2b4b8e71ce6a93530cbe9e4e45cbe71