Initial commit of Kconfig build tool.

[seabios.git] / tools / kconfig / util.c

diff --git a/tools/kconfig/util.c b/tools/kconfig/util.c
new file mode 100644 (file)
index 0000000..6330cc8
--- /dev/null
+++ b/tools/kconfig/util.c
@@ -0,0 +1,138 @@
+/*
+ * 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;
+       const char *file_name = sym_expand_string_value(name);
+
+       for (file = file_list; file; file = file->next) {
+               if (!strcmp(name, file->name)) {
+                       free((void *)file_name);
+                       return file;
+               }
+       }
+
+       file = malloc(sizeof(*file));
+       memset(file, 0, sizeof(*file));
+       file->name = file_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, "\n%s: \\\n"
+                    "\t$(deps_config)\n\n", conf_get_autoconfig_name());
+
+       expr_list_for_each_sym(sym_env_list, e, sym) {
+               struct property *prop;
+               const char *value;
+
+               prop = sym_get_env_prop(sym);
+               env_sym = prop_get_symbol(prop);
+               if (!env_sym)
+                       continue;
+               value = getenv(env_sym->name);
+               if (!value)
+                       value = "";
+               fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value);
+               fprintf(out, "%s: FORCE\n", conf_get_autoconfig_name());
+               fprintf(out, "endif\n");
+       }
+
+       fprintf(out, "\n$(deps_config): ;\n");
+       fclose(out);
+       rename("..config.tmp", name);
+       return 0;
+}
+
+
+/* Allocate initial growable string */
+struct gstr str_new(void)
+{
+       struct gstr gs;
+       gs.s = malloc(sizeof(char) * 64);
+       gs.len = 64;
+       gs.max_width = 0;
+       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;
+       gs.max_width = 0;
+       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;
+}
+