implement a minimal xxd for builds to remove external dependancy

content/handlers/javascript/duktape/Makefile

@@ -11,18 +11,24 @@ content/handlers/javascript/duktape/dukky.c: \
 
 BINDINGS := $(wildcard content/handlers/javascript/duktape/*.bnd)
 
+# Host tool to convert file to comiled data
+#
+$(TOOLROOT)/xxd: utils/xxd.c $(TOOLROOT)/created
+	$(VQ)echo "BUILD CC: $@"
+	$(Q)$(BUILD_CC) $(BUILD_CFLAGS) -o $@ $< $(BUILD_LDFLAGS)
+
 # Generator for the C include representing the generics.js
-$(OBJROOT)/duktape/generics.js.inc: content/handlers/javascript/duktape/generics.js
+$(OBJROOT)/duktape/generics.js.inc: content/handlers/javascript/duktape/generics.js $(TOOLROOT)/xxd
 	$(Q)$(MKDIR) -p $(OBJROOT)/duktape
 	$(VQ)echo "     XXD: $<"
-	$(Q)xxd -i $< $@.tmp
+	$(Q)$(TOOLROOT)/xxd -i $< $@.tmp
 	$(Q)sed -e 's/content_handlers_javascript_duktape_generics_js/generics_js/' $@.tmp > $@
 
 # Generator for the C include representing the polyfill.js
-$(OBJROOT)/duktape/polyfill.js.inc: content/handlers/javascript/duktape/polyfill.js
+$(OBJROOT)/duktape/polyfill.js.inc: content/handlers/javascript/duktape/polyfill.js $(TOOLROOT)/xxd
 	$(Q)$(MKDIR) -p $(OBJROOT)/duktape
 	$(VQ)echo "     XXD: $<"
-	$(Q)xxd -i $< $@.tmp
+	$(Q)$(TOOLROOT)/xxd -i $< $@.tmp
 	$(Q)sed -e 's/content_handlers_javascript_duktape_polyfill_js/polyfill_js/' $@.tmp > $@
 
 # ensure genbind generates debugging files

utils/xxd.c

@@ -0,0 +1,135 @@
+/*
+ * xxd utility
+ *
+ * Copyright 2020 Lars Wirzenius 
+ * Copyright 2020 Vincent Sanders <vince@netsurf-browser.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ *  * The above copyright notice and this permission notice shall be included in
+ *    all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+static char *get_array_name(const char *fname)
+{
+	int fnamelen;
+	char *aryname;
+	int idx;
+
+	fnamelen = strlen(fname);
+	aryname = malloc(fnamelen + 1);
+
+	if (aryname != NULL) {
+		for (idx = 0; idx < fnamelen; idx++) {
+			int c = fname[idx];
+			if ((c >= '0' && c <= '9') ||
+			    (c >= 'A' && c <= 'Z') ||
+			    (c >= 'a' && c <= 'z')) {
+				aryname[idx] = fname[idx];
+			} else {
+				aryname[idx] = '_';
+			}
+		}
+		aryname[idx] = 0;
+	}
+	return aryname;
+}
+
+int main(int argc, char **argv)
+{
+	int inc = 0;
+	int opt;
+	int c, n;
+	FILE *inf;
+	FILE *outf;
+	char *aryname = NULL;
+	int outlen;
+
+	while ((opt = getopt(argc, argv, "i")) != -1) {
+		switch (opt) {
+		case 'i':
+			inc = 1;
+			break;
+
+		default: /* '?' */
+			fprintf(stderr, "Usage: %s [-i] [infile [outfile]]]\n",
+				argv[0]);
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	if (optind < argc) {
+		inf = fopen(argv[optind], "r");
+		if (inf == NULL) {
+			perror("Opening for read");
+			exit(EXIT_FAILURE);			
+		}
+		aryname = get_array_name(argv[optind]);
+		optind++;
+	} else {
+		inf = stdin;
+
+	}
+
+	if (optind < argc) {
+		outf = fopen(argv[optind], "w");
+		if (outf == NULL) {
+			perror("Opening for write");
+			exit(EXIT_FAILURE);			
+		}
+	} else {
+		outf = stdout;
+	}
+
+	if ((inc != 0) && (aryname != NULL)) {
+		fprintf(outf, "unsigned char %s[] = {\n", aryname);
+	}
+
+	outlen = 0;
+	n = 0;
+	while ((c = getc(inf)) != EOF) {
+		if (n == 0) {
+			fprintf(outf, " ");
+		}
+		fprintf(outf, " 0x%02x,", c);
+		n += 1;
+		outlen++;
+		if (n >= 12) {
+			fprintf(outf, "\n");
+			n = 0;
+		}
+	}
+	if (n > 0) {
+		fprintf(outf, "\n");
+	}
+
+	if ((inc != 0) && (aryname != NULL)) {
+		fprintf(outf, "};\nunsigned int %s_len = %d;\n",
+			aryname, outlen);
+	}
+
+
+	
+	fclose(outf);
+	fclose(inf);
+	
+	return 0;
+}