embed resources into binary

This way you can run wesgr from any CWD, as it does not need to find any
files of its own.

Makefile

@@ -9,7 +9,7 @@ CPPFLAGS+=$(DEP_CFLAGS) -D_GNU_SOURCE
 LDLIBS+=$(DEP_LIBS) -lm
 
 HEADERS := $(wildcard *.h)
-OBJS := wesgr.o parse.o graphdata.o handler.o
+OBJS := wesgr.o parse.o graphdata.o handler.o resdata.o
 EXE := wesgr
 GENERATED := config.mk
 
@@ -26,6 +26,8 @@ $(EXE): $(OBJS)
 
 $(OBJS): $(HEADERS) config.mk
 
+resdata.o: legend.xml style.css
+
 PKG_DEPS := json-c >= 0.11
 config.mk: Makefile
 	$(M_V_GEN)\
@@ -47,12 +49,16 @@ sample3-detail.svg: $(EXE) style.css
 %.o: %.c
 	$(M_V_CC)$(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $<
 
+%.o: %.S
+	$(M_V_AS)$(CC) $(ASFLAGS) $(CPPFLAGS) $(TARGET_MACH) -c -o $@ $<
+
 .SUFFIXES:
 
 m_v_cc_0 = @echo "  CC    " $@;
 M_V_CC = $(m_v_cc_$(V))
+m_v_as_0 = @echo "  CCAS  " $@;
+M_V_AS = $(m_v_as_$(V))
 m_v_link_0 = @echo "  LINK  " $@;
 M_V_LINK = $(m_v_link_$(V))
 m_v_gen_0 = @echo "  GEN   " $@;
 M_V_GEN = $(m_v_gen_$(V))
-

graphdata.c

@@ -627,27 +627,28 @@ time_scale_to_svg(struct svg_context *ctx, double y)
 }
 
 static int
-input_file(struct svg_context *ctx, const char *fname)
+output_res(struct svg_context *ctx, char *data, size_t len)
 {
-	FILE *in;
-	char buf[2048];
-	size_t len;
+	size_t pos = 0;
+	size_t n;
 
-	in = fopen(fname, "r");
-	if (!in)
-		return ERROR;
-
-	while ((len = fread(buf, 1, sizeof(buf), in))) {
-		if (fwrite(buf, 1, len, ctx->fp) != len) {
-			fclose(in);
+	while (pos < len) {
+		n = fwrite(data + pos, 1, len - pos, ctx->fp);
+		if (n < 1)
 			return ERROR;
-		}
+		pos += n;
 	}
-	fclose(in);
 
 	return 0;
 }
 
+#define OUTPUT_RES(ctx, name)						\
+({									\
+	extern char RES_##name##_begin;					\
+	extern int RES_##name##_len;					\
+	output_res((ctx), &RES_##name##_begin, RES_##name##_len);	\
+})
+
 static int
 headers_to_svg(struct svg_context *ctx)
 {
@@ -660,7 +661,7 @@ headers_to_svg(struct svg_context *ctx)
 		"<style type=\"text/css\"><![CDATA[\n",
 		(int)ctx->width, (int)ctx->height);
 
-	if (input_file(ctx, "style.css") < 0)
+	if (OUTPUT_RES(ctx, style) < 0)
 		return ERROR;
 
 	fprintf(ctx->fp,
@@ -686,7 +687,7 @@ legend_to_svg(struct svg_context *ctx, double y)
 	fprintf(ctx->fp, "<g transform=\"translate(%.2f,%.2f)\">\n",
 		svg_get_x_from_nsec(ctx, 0), y);
 
-	if (input_file(ctx, "legend.xml") < 0)
+	if (OUTPUT_RES(ctx, legend) < 0)
 		return ERROR;
 
 	fprintf(ctx->fp, "</g>\n");

resdata.S

@@ -0,0 +1,41 @@
+/*
+ * Copyright © 2015 Collabora, Ltd.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the copyright holders not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission.  The copyright holders make
+ * no representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* from: http://www.linuxjournal.com/content/embedding-file-executable-aka-hello-world-version-5967#comment-348129 */
+
+.altmacro
+.macro binfile name file
+	.p2align 2
+	.globl \name&_begin
+\name&_begin:
+	.incbin \file
+\name&_end:
+	.byte 0
+	.p2align 2
+	.globl \name&_len
+\name&_len:
+	.int (\name&_end - \name&_begin)
+.endm
+
+.section .rodata
+binfile RES_style "style.css"
+binfile RES_legend "legend.xml"