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-rw-r--r--util/kconfig/util.c133
1 files changed, 133 insertions, 0 deletions
diff --git a/util/kconfig/util.c b/util/kconfig/util.c
new file mode 100644
index 0000000000..a47d5e0fdc
--- /dev/null
+++ b/util/kconfig/util.c
@@ -0,0 +1,133 @@
+/*
+ * 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 symbol *sym, *env_sym;
+ struct expr *e;
+ struct file *file;
+ FILE *out;
+
+ if (!name)
+ name = ".kconfig.d";
+ 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, "\nbuild/auto.conf: \\\n"
+ "\t$(deps_config)\n\n");
+
+ expr_list_for_each_sym(sym_env_list, e, sym) {
+ struct property *prop;
+ const char *value;
+
+ prop = sym_get_env_prop(sym);
+ env_sym = prop_get_symbol(prop);
+ if (!env_sym)
+ continue;
+ value = getenv(env_sym->name);
+ if (!value)
+ value = "";
+ fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value);
+ fprintf(out, "build/auto.conf: FORCE\n");
+ fprintf(out, "endif\n");
+ }
+
+ fprintf(out, "\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;
+ if (s) {
+ 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);
+}
+
+/* Retrieve value of growable string */
+const char *str_get(struct gstr *gs)
+{
+ return gs->s;
+}
+