backend: Remove filespec.d

compiler/src/build.d

@@ -1622,7 +1622,7 @@ auto sourceFiles()
         "),
         backend: fileArray(env["C"], "
             bcomplex.d evalu8.d divcoeff.d dvec.d go.d gsroa.d glocal.d gdag.d gother.d gflow.d
-            dout.d inliner.d eh.d filespec.d aarray.d
+            dout.d inliner.d eh.d aarray.d
             gloop.d cgelem.d cgcs.d ee.d blockopt.d mem.d cg.d
             dtype.d debugprint.d fp.d symbol.d symtab.d elem.d dcode.d cgsched.d
             pdata.d util2.d var.d backconfig.d drtlsym.d ptrntab.d

compiler/src/dmd/backend/dwarfdbginf.d

@@ -68,7 +68,6 @@
     import dmd.backend.dlist;
     import dmd.backend.el;
     import dmd.backend.elfobj : addSegmentToComdat;
-    import dmd.backend.filespec;
     import dmd.backend.machobj : getsegment2;
     import dmd.backend.global;
     import dmd.backend.obj;
@@ -3234,3 +3233,36 @@
     void dwarf_CFA_offset(int reg, int offset) { }
     void dwarf_except_gentables(Funcsym *sfunc, uint startoffset, uint retoffset) { }
 }
+
+version (Windows)
+{
+    private enum DIRCHAR = '\\';
+
+    private bool ispathdelim(char c) nothrow { return c == DIRCHAR || c == ':' || c == '/'; }
+}
+else
+{
+    private enum DIRCHAR = '/';
+
+    private bool ispathdelim(char c) nothrow { return c == DIRCHAR; }
+}
+
+/**********************
+ * Returns: string that is the filename plus dot and extension.
+ * The string returned is NOT mem_malloc'ed.
+ */
+@trusted
+private char* filespecname(const(char)* filespec) nothrow
+{
+    const(char)* p;
+
+    /* Start at end of string and back up till we find the beginning
+     * of the filename or a path
+     */
+    for (p = filespec + strlen(filespec);
+         p != filespec && !ispathdelim(*(p - 1));
+         p--
+        )
+    { }
+    return cast(char *)p;
+}