From 71aeab9ab80bd29fe7049db9872df65da7cdbb3b Mon Sep 17 00:00:00 2001
From: Werner Almesberger <werner@almesberger.net>
Date: Sun, 31 Jul 2016 15:10:14 -0300
Subject: [PATCH] sch2fig/main.c (read_file): move to file.c

This is to allow further I/O abstraction, later.
---
 sch2fig/Makefile |  1 +
 sch2fig/file.c   | 41 +++++++++++++++++++++++++++++++++++++++++
 sch2fig/file.h   | 22 ++++++++++++++++++++++
 sch2fig/main.c   | 36 +++++++-----------------------------
 4 files changed, 71 insertions(+), 29 deletions(-)
 create mode 100644 sch2fig/file.c
 create mode 100644 sch2fig/file.h

diff --git a/sch2fig/Makefile b/sch2fig/Makefile
index 45c060f..87d78f0 100644
--- a/sch2fig/Makefile
+++ b/sch2fig/Makefile
@@ -12,6 +12,7 @@
 
 NAME = sch2fig
 OBJS = main.o sch-parse.o sch-render.o lib-parse.o lib-render.o \
+       file.o \
        style.o fig.o cairo.o gfx.o dwg.o text.o misc.o
 
 CFLAGS = -g -O -Wall -Wextra -Wno-unused-parameter -Wshadow \
diff --git a/sch2fig/file.c b/sch2fig/file.c
new file mode 100644
index 0000000..c94536c
--- /dev/null
+++ b/sch2fig/file.c
@@ -0,0 +1,41 @@
+/*
+ * file.c - Open and read a file
+ *
+ * Written 2016 by Werner Almesberger
+ * Copyright 2016 by Werner Almesberger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "file.h"
+
+
+void file_read(const char *name, bool (*parse)(void *user, const char *line),
+    void *user)
+{
+	FILE *file;
+	char buf[1000];
+	char *nl;
+
+	file = fopen(name, "r");
+	if (!file) {
+		perror(name);
+		exit(1);
+	}
+	while (fgets(buf, sizeof(buf), file)) {
+		nl = strchr(buf, '\n');
+		if (nl)
+			*nl = 0;
+		if (!parse(user, buf))
+			break;
+	}
+	fclose(file);
+}
diff --git a/sch2fig/file.h b/sch2fig/file.h
new file mode 100644
index 0000000..fabc2e4
--- /dev/null
+++ b/sch2fig/file.h
@@ -0,0 +1,22 @@
+/*
+ * file.h - Open and read a file
+ *
+ * Written 2016 by Werner Almesberger
+ * Copyright 2016 by Werner Almesberger
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef FILE_H
+#define	FILE_H
+
+#include <stdbool.h>
+
+
+void file_read(const char *name, bool (*parse)(void *user, const char *line),
+    void *user);
+
+#endif /* !FILE_H */
diff --git a/sch2fig/main.c b/sch2fig/main.c
index 0284dca..db8cf85 100644
--- a/sch2fig/main.c
+++ b/sch2fig/main.c
@@ -19,42 +19,20 @@
 #include "fig.h"
 #include "cairo.h"
 #include "gfx.h"
+#include "file.h"
 #include "lib.h"
 #include "sch.h"
 
 
-static bool do_sch_parse(void *ctx, const char *line)
+static bool do_sch_parse(void *user, const char *line)
 {
-	return sch_parse(ctx, line);
+	return sch_parse(user, line);
 }
 
 
-static bool do_lib_parse(void *ctx, const char *line)
+static bool do_lib_parse(void *user, const char *line)
 {
-	return lib_parse(ctx, line);
-}
-
-
-static void read_file(const char *name, void *ctx,
-    bool (*parse)(void *ctx, const char *line))
-{
-	FILE *file;
-	char buf[1000];
-	char *nl;
-
-	file = fopen(name, "r");
-	if (!file) {
-		perror(name);
-		exit(1);
-	}
-	while (fgets(buf, sizeof(buf), file)) {
-		nl = strchr(buf, '\n');
-		if (nl)
-			*nl = 0;
-		if (!parse(ctx, buf))
-			break;
-	}
-	fclose(file);
+	return lib_parse(user, line);
 }
 
 
@@ -99,11 +77,11 @@ int main(int argc, char **argv)
 		struct lib_ctx ctx;
 
 		lib_init(&ctx);
-		read_file(argv[arg], &ctx, do_lib_parse);
+		file_read(argv[arg], do_lib_parse, &ctx);
 	}
 
 	sch_init(&sch_ctx);
-	read_file(argv[argc - 1], &sch_ctx, do_sch_parse);
+	file_read(argv[argc - 1], do_sch_parse, &sch_ctx);
 	gfx_init(&fig_ops, template, n_vars, vars);
 	//gfx_init(&cairo_ops, template, n_vars, vars);
 	sch_render(&sch_ctx);