nasmlib: Add nasm_realpath()

Converts a relative pathname to an absolute pathname.

Signed-off-by: Jim Kukunas <james.t.kukunas@linux.intel.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

2 files changed, 19 insertions, 0 deletions

diff --git a/nasmlib.c b/nasmlib.c
index ecd6d8df..9d57adbc 100644
--- a/nasmlib.c
+++ b/nasmlib.c
@@ -696,6 +696,18 @@ char *nasm_opt_val(char *p, char **val, char **next)
     return p;
 }
 
+#ifdef _WIN32
+char *nasm_realpath(const char *rel_path)
+{
+    return _fullpath(NULL, rel_path, 0);
+}
+#else
+char *nasm_realpath(const char *rel_path)
+{
+    return realpath(rel_path, NULL);
+}
+#endif
+
 /*
  * initialized data bytes length from opcode
  */
diff --git a/nasmlib.h b/nasmlib.h
index a3a8c12a..9cd417f1 100644
--- a/nasmlib.h
+++ b/nasmlib.h
@@ -400,6 +400,13 @@ char *nasm_trim_spaces(char *p);
 char *nasm_get_word(char *p, char **tail);
 char *nasm_opt_val(char *p, char **opt, char **val);
 
+/*
+ * Converts a relative pathname rel_path into an absolute path name.
+ *
+ * The buffer returned must be freed by the caller
+ */
+char *nasm_realpath(const char *rel_path);
+
 const char *prefix_name(int);
 
 #define ZERO_BUF_SIZE 4096