kconfig: introduce util.c

Moved two functions from menu.c to new file util.c.
Introduced functions to handle growable strings - no user yet.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

5 files changed, 124 insertions, 40 deletions

diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index e348ee7d86a54d..b8a67fc9d6476d 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -56,9 +56,22 @@ void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep);
 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep);
 void menu_finalize(struct menu *parent);
 void menu_set_type(int type);
+
+/* util.c */
 struct file *file_lookup(const char *name);
 int file_write_dep(const char *name);
 
+struct gstr {
+	size_t len;
+	char  *s;
+};
+struct gstr str_new(void);
+struct gstr str_assign(const char *s);
+void str_free(struct gstr *gs);
+void str_append(struct gstr *gs, const char *s);
+void str_printf(struct gstr *gs, const char *fmt, ...);
+const char *str_get(struct gstr *gs);
+
 /* symbol.c */
 void sym_init(void);
 void sym_clear_all_valid(void);
diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index 7b26f982bad59f..0c13156f33441f 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -388,43 +388,3 @@ struct menu *menu_get_parent_menu(struct menu *menu)
 	return menu;
 }
 
-struct file *file_lookup(const char *name)
-{
-	struct file *file;
-
-	for (file = file_list; file; file = file->next) {
-		if (!strcmp(name, file->name))
-			return file;
-	}
-
-	file = malloc(sizeof(*file));
-	memset(file, 0, sizeof(*file));
-	file->name = strdup(name);
-	file->next = file_list;
-	file_list = file;
-	return file;
-}
-
-int file_write_dep(const char *name)
-{
-	struct file *file;
-	FILE *out;
-
-	if (!name)
-		name = ".config.cmd";
-	out = fopen("..config.tmp", "w");
-	if (!out)
-		return 1;
-	fprintf(out, "deps_config := \\\n");
-	for (file = file_list; file; file = file->next) {
-		if (file->next)
-			fprintf(out, "\t%s \\\n", file->name);
-		else
-			fprintf(out, "\t%s\n", file->name);
-	}
-	fprintf(out, "\n.config include/linux/autoconf.h: $(deps_config)\n\n$(deps_config):\n");
-	fclose(out);
-	rename("..config.tmp", name);
-	return 0;
-}
-
diff --git a/scripts/kconfig/util.c b/scripts/kconfig/util.c
new file mode 100644
index 00000000000000..1fa4c0b801b34f
--- /dev/null
+++ b/scripts/kconfig/util.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2002-2005 Roman Zippel <zippel@linux-m68k.org>
+ * Copyright (C) 2002-2005 Sam Ravnborg <sam@ravnborg.org>
+ *
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <string.h>
+#include "lkc.h"
+
+/* file already present in list? If not add it */
+struct file *file_lookup(const char *name)
+{
+	struct file *file;
+
+	for (file = file_list; file; file = file->next) {
+		if (!strcmp(name, file->name))
+			return file;
+	}
+
+	file = malloc(sizeof(*file));
+	memset(file, 0, sizeof(*file));
+	file->name = strdup(name);
+	file->next = file_list;
+	file_list = file;
+	return file;
+}
+
+/* write a dependency file as used by kbuild to track dependencies */
+int file_write_dep(const char *name)
+{
+	struct file *file;
+	FILE *out;
+
+	if (!name)
+		name = ".config.cmd";
+	out = fopen("..config.tmp", "w");
+	if (!out)
+		return 1;
+	fprintf(out, "deps_config := \\\n");
+	for (file = file_list; file; file = file->next) {
+		if (file->next)
+			fprintf(out, "\t%s \\\n", file->name);
+		else
+			fprintf(out, "\t%s\n", file->name);
+	}
+	fprintf(out, "\n.config include/linux/autoconf.h: $(deps_config)\n\n$(deps_config):\n");
+	fclose(out);
+	rename("..config.tmp", name);
+	return 0;
+}
+
+
+/* Allocate initial growable sting */
+struct gstr str_new(void)
+{
+	struct gstr gs;
+	gs.s = malloc(sizeof(char) * 64);
+	gs.len = 16;
+	strcpy(gs.s, "\0");
+	return gs;
+}
+
+/* Allocate and assign growable string */
+struct gstr str_assign(const char *s)
+{
+	struct gstr gs;
+	gs.s = strdup(s);
+	gs.len = strlen(s) + 1;
+	return gs;
+}
+
+/* Free storage for growable string */
+void str_free(struct gstr *gs)
+{
+	if (gs->s)
+		free(gs->s);
+	gs->s = NULL;
+	gs->len = 0;
+}
+
+/* Append to growable string */
+void str_append(struct gstr *gs, const char *s)
+{
+	size_t l = strlen(gs->s) + strlen(s) + 1;
+	if (l > gs->len) {
+		gs->s   = realloc(gs->s, l);
+		gs->len = l;
+	}
+	strcat(gs->s, s);
+}
+
+/* Append printf formatted string to growable string */
+void str_printf(struct gstr *gs, const char *fmt, ...)
+{
+	va_list ap;
+	char s[10000]; /* big enough... */
+	va_start(ap, fmt);
+	vsnprintf(s, sizeof(s), fmt, ap);
+	str_append(gs, s);
+	va_end(ap);
+}
+
+/* Retreive value of growable string */
+const char *str_get(struct gstr *gs)
+{
+	return gs->s;
+}
+
diff --git a/scripts/kconfig/zconf.tab.c_shipped b/scripts/kconfig/zconf.tab.c_shipped
index a48105a405bb77..f163d8d2d9ef2e 100644
--- a/scripts/kconfig/zconf.tab.c_shipped
+++ b/scripts/kconfig/zconf.tab.c_shipped
@@ -2121,6 +2121,7 @@ void zconfdump(FILE *out)
 }
 
 #include "lex.zconf.c"
+#include "util.c"
 #include "confdata.c"
 #include "expr.c"
 #include "symbol.c"
diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y
index aad1f51147656a..54460f8d3696b2 100644
--- a/scripts/kconfig/zconf.y
+++ b/scripts/kconfig/zconf.y
@@ -683,6 +683,7 @@ void zconfdump(FILE *out)
 }
 
 #include "lex.zconf.c"
+#include "util.c"
 #include "confdata.c"
 #include "expr.c"
 #include "symbol.c"