1 files changed, 109 insertions, 0 deletions

diff --git a/scripts/kconfig/util.c b/scripts/kconfig/util.c
new file mode 100644
index 000000000000..1fa4c0b801b3
--- /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;
+}
+