From 72daa122b6a4a9562109299d0b747c71aac1e483 Mon Sep 17 00:00:00 2001
From: Peter Korsgaard <jacmet@sunsite.dk>
Date: Wed, 2 Feb 2011 11:48:58 +0100
Subject: package/config: rebase against 2.6.37-rc1

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
---
 package/config/symbol.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 49 insertions(+), 2 deletions(-)

(limited to 'package/config/symbol.c')

diff --git a/package/config/symbol.c b/package/config/symbol.c
index 1f8b30544..c0efe102d 100644
--- a/package/config/symbol.c
+++ b/package/config/symbol.c
@@ -350,7 +350,6 @@ void sym_calc_value(struct symbol *sym)
 				}
 			}
 		calc_newval:
-#if 0
 			if (sym->dir_dep.tri == no && sym->rev_dep.tri != no) {
 				fprintf(stderr, "warning: (");
 				expr_fprint(sym->rev_dep.expr, stderr);
@@ -359,7 +358,6 @@ void sym_calc_value(struct symbol *sym)
 				expr_fprint(sym->dir_dep.expr, stderr);
 				fprintf(stderr, ")\n");
 			}
-#endif
 			newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri);
 		}
 		if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN)
@@ -842,6 +840,55 @@ struct symbol *sym_find(const char *name)
 	return symbol;
 }
 
+/*
+ * Expand symbol's names embedded in the string given in argument. Symbols'
+ * name to be expanded shall be prefixed by a '$'. Unknown symbol expands to
+ * the empty string.
+ */
+const char *sym_expand_string_value(const char *in)
+{
+	const char *src;
+	char *res;
+	size_t reslen;
+
+	reslen = strlen(in) + 1;
+	res = malloc(reslen);
+	res[0] = '\0';
+
+	while ((src = strchr(in, '$'))) {
+		char *p, name[SYMBOL_MAXLENGTH];
+		const char *symval = "";
+		struct symbol *sym;
+		size_t newlen;
+
+		strncat(res, in, src - in);
+		src++;
+
+		p = name;
+		while (isalnum(*src) || *src == '_')
+			*p++ = *src++;
+		*p = '\0';
+
+		sym = sym_find(name);
+		if (sym != NULL) {
+			sym_calc_value(sym);
+			symval = sym_get_string_value(sym);
+		}
+
+		newlen = strlen(res) + strlen(symval) + strlen(src);
+		if (newlen > reslen) {
+			reslen = newlen;
+			res = realloc(res, reslen);
+		}
+
+		strcat(res, symval);
+		in = src;
+	}
+	strcat(res, in);
+
+	return res;
+}
+
 struct symbol **sym_re_search(const char *pattern)
 {
 	struct symbol *sym, **sym_arr = NULL;
-- 
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