From 35abd695cdae58fbcef7fafd4c15a6552dc24532 Mon Sep 17 00:00:00 2001
From: Sergey Lyubka <valenok@gmail.com>
Date: Sun, 25 Jul 2021 10:22:56 +0100
Subject: [PATCH] Add packed FS

---
 examples/complete/Makefile | 19 ++++++++--
 examples/complete/main.c   |  9 ++---
 examples/complete/pack.c   | 71 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 92 insertions(+), 7 deletions(-)
 create mode 100644 examples/complete/pack.c

diff --git a/examples/complete/Makefile b/examples/complete/Makefile
index 2a081f02..23b87e0c 100644
--- a/examples/complete/Makefile
+++ b/examples/complete/Makefile
@@ -1,10 +1,23 @@
 PROG ?= example
+SOURCES ?= ../../mongoose.c main.c mjson.c fs.c
+CFLAGS ?= -I../.. $(EXTRA)
+FILES_TO_EMBED ?= $(wildcard web_root/*.js) $(wildcard web_root/*.css) $(wildcard web_root/*.html) $(wildcard web_root/images/*.png) $(wildcard images/*.jpg)
 
 all: $(PROG)
-	$(DEBUGGER) ./$(PROG)
+	$(RUN) ./$(PROG)
 
 $(PROG):
-	$(CC) ../../mongoose.c -I../.. $(CFLAGS) $(EXTRA) -o $(PROG) main.c mjson.c
+	$(CC) pack.c -o pack
+	./pack $(FILES_TO_EMBED) > fs.c
+	$(CC) -W -Wall -Wextra -O3 -g3 $(CFLAGS) -o $(PROG) $(SOURCES)
+
+ROOT ?= $(realpath $(CURDIR)/../..)
+DOCKER ?= docker run -it --rm -e Tmp=. -e WINEDEBUG=-all -v $(ROOT):$(ROOT) -w $(CURDIR) mdashnet/vc98 wine
+windows:
+	$(DOCKER) cl.exe /nologo $(CFLAGS) pack.c /Fepack.exe
+	$(DOCKER) cmd /c 'pack.exe $(FILES_TO_EMBED) > fs.c'
+	$(DOCKER) cl.exe /nologo /O2 $(CFLAGS) $(SOURCES) ws2_32.lib /Fe$(PROG).exe
+	$(DOCKER) $(PROG).exe
 
 clean:
-	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb log.txt
+	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb log.txt fs.c pack
diff --git a/examples/complete/main.c b/examples/complete/main.c
index 3d948380..67d2f780 100644
--- a/examples/complete/main.c
+++ b/examples/complete/main.c
@@ -36,13 +36,13 @@ static bool update_config(struct mg_http_message *hm, struct config *cfg) {
   char buf[256];
   double dv;
   if (mjson_get_number(hm->body.ptr, hm->body.len, "$.value1", &dv)) {
-    s_config.value1 = dv;
+    cfg->value1 = dv;
     changed = true;
   }
   if (mjson_get_string(hm->body.ptr, hm->body.len, "$.value2", buf,
                        sizeof(buf)) > 0) {
-    free(s_config.value2);
-    s_config.value2 = strdup(buf);
+    free(cfg->value2);
+    cfg->value2 = strdup(buf);
     changed = true;
   }
   return changed;
@@ -129,7 +129,8 @@ static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
                            u->token);
       mg_http_printf_chunk(c, "");
     } else {
-      struct mg_http_serve_opts opts = {.root_dir = "web_root"};
+      struct mg_http_serve_opts opts = {0};
+      opts.root_dir = "web_root";
       mg_http_serve_dir(c, ev_data, &opts);
     }
   }
diff --git a/examples/complete/pack.c b/examples/complete/pack.c
new file mode 100644
index 00000000..7c5d1adc
--- /dev/null
+++ b/examples/complete/pack.c
@@ -0,0 +1,71 @@
+// Copyright (c) Cesanta Software Limited
+// All rights reserved.
+
+// This program is used to pack arbitrary data into a C binary. It takes
+// a list of files as an input, and produces a .c data file that contains
+// contents of all these files as a collection of byte arrays.
+//
+// Usage:
+//   1. Compile this file:
+//      cc -o pack pack.c
+//
+//   2. Convert list of files into single .c:
+//      ./pack file1.data file2.data > fs.c
+//
+//   3. In your application code, you can access files using this function:
+//      const char *unpack(const char *file_name, size_t *size);
+//
+//   4. Build your app with fs.c:
+//      cc -o my_app my_app.c fs.c
+
+#include <stdio.h>
+#include <stdlib.h>
+
+static const char *code =
+    "const char *unpack(const char *name, size_t *size) {\n"
+    "  const struct packed_file *p;\n"
+    "  for (p = packed_files; p->name != NULL; p++) {\n"
+    "    if (strcmp(p->name, name) != 0) continue;\n"
+    "    if (size != NULL) *size = p->size - 1;\n"
+    "    return (const char *) p->data;\n"
+    "  }\n"
+    "  return NULL;\n"
+    "}\n";
+
+int main(int argc, char *argv[]) {
+  int i, j, ch;
+
+  printf("%s", "#include <stddef.h>\n");
+  printf("%s", "#include <string.h>\n");
+  printf("%s", "\n");
+
+  for (i = 1; i < argc; i++) {
+    FILE *fp = fopen(argv[i], "rb");
+    if (fp == NULL) exit(EXIT_FAILURE);
+
+    printf("static const unsigned char v%d[] = {", i);
+    for (j = 0; (ch = fgetc(fp)) != EOF; j++) {
+      if ((j % 12) == 0) printf("%s", "\n ");
+      printf(" %3u,", ch);
+    }
+    // Append zero byte at the end, to make text files appear in memory
+    // as nul-terminated strings.
+    printf("%s", " 0x00\n};\n");
+    fclose(fp);
+  }
+
+  printf("%s", "\nconst struct packed_file {\n");
+  printf("%s", "  const char *name;\n");
+  printf("%s", "  const unsigned char *data;\n");
+  printf("%s", "  size_t size;\n");
+  printf("%s", "} packed_files[] = {\n");
+
+  for (i = 1; i < argc; i++) {
+    printf("  {\"%s\", v%d, sizeof(v%d) },\n", argv[i], i, i);
+  }
+  printf("%s", "  {NULL, NULL, 0}\n");
+  printf("%s", "};\n\n");
+  printf("%s", code);
+
+  return EXIT_SUCCESS;
+}