don't embed full-path.

miniruby load *.rb from srcdir. To specify file path,
tool/mk_builtin_loader.rb embed full path of each *.rb file.
However it prevent to pre-generation of required files for tarball.
This patch generate srcdir/*.rb from __FILE__ information.

1 files changed, 24 insertions, 2 deletions

diff --git a/mini_builtin.c b/mini_builtin.c
index dc95919da2..060c955fcb 100644
--- a/mini_builtin.c
+++ b/mini_builtin.c
@@ -36,12 +36,23 @@ read_file(const char *fname, size_t *psize)
 }
 
 static struct st_table *loaded_builtin_table;
+static char srcdir[0x200];
+static const char fname[] = "mini_builtin.c";
+
+static const char *
+feature_path(const char *name)
+{
+    static char path[0x200];
+    snprintf(path, 0x200-1, "%s%s.rb", srcdir, name);
+    // fprintf(stderr, "srcdir:%s, path:%s, PATH_SEP_CHAR:%c\n", srcdir, path, PATH_SEP_CHAR);
+    return path;
+}
 
 void
-rb_load_with_builtin_functions(const char *feature_name, const char *fname, const struct rb_builtin_function *table)
+rb_load_with_builtin_functions(const char *feature_name, const struct rb_builtin_function *table)
 {
     size_t fsize;
-    const char *code = read_file(fname, &fsize);
+    const char *code = read_file(feature_path(feature_name), &fsize);
     VALUE code_str = rb_utf8_str_new_static(code, fsize);
     VALUE name_str = rb_sprintf("<internal:%s>", feature_name);
     rb_obj_hide(code_str);
@@ -86,4 +97,15 @@ Init_builtin(void)
 {
     rb_define_singleton_method(rb_cRubyVM, "each_builtin", each_builtin, 0);
     loaded_builtin_table = st_init_strtable();
+
+    // check srcdir
+    // assume __FILE__ encoding is ASCII compatible.
+    int pos = strlen(__FILE__) - strlen(fname);
+    if (pos < 0) rb_bug("strlen(%s) - strlen(%s) < 0", __FILE__, fname);
+
+    if (strcmp(__FILE__ + pos, fname) != 0) {
+        rb_bug("%s does not terminate with %s\n", __FILE__, fname);
+    }
+    strncpy(srcdir, __FILE__, 0x200-1);
+    srcdir[pos] = 0;
 }