From 53ead9b575608b087ca06879021411a4df19f35c Mon Sep 17 00:00:00 2001
From: Dan Nicholson <dbn.lists@gmail.com>
Date: Sat, 11 Apr 2009 10:35:44 -0700
Subject: [PATCH] Use xkbpath API for locating rules

Instead of hardcoding the XKB base directory when searching for rules in
the xkbcomp code, we can extend the xkbpath API to cover rules and reuse
it. That will make it more convenient if it's ever exposed so people can
set their XKB search paths in a reasonable way.
---
 src/xkbcomp/xkbcomp.c | 46 +++++++++++++++++++++++++---------------------
 src/xkbcomp/xkbpath.c |  3 +++
 2 files changed, 28 insertions(+), 21 deletions(-)

diff --git a/src/xkbcomp/xkbcomp.c b/src/xkbcomp/xkbcomp.c
index cfd73c5..b780ff9 100644
--- a/src/xkbcomp/xkbcomp.c
+++ b/src/xkbcomp/xkbcomp.c
@@ -29,13 +29,10 @@ authorization from the authors.
 #include "xkballoc.h"
 #include "xkbrules.h"
 #include <X11/extensions/XKM.h>
+#include "xkbpath.h"
 #include "parseutils.h"
 #include "utils.h"
 
-#ifndef DFLT_XKB_CONFIG_ROOT
-#define DFLT_XKB_CONFIG_ROOT "/usr/share/X11/xkb"
-#endif
-
 /* Global debugging flags */
 unsigned int debugFlags = 0;
 unsigned int warningLevel = 0;
@@ -77,14 +74,27 @@ XkbKeymapFileFromComponents(const XkbComponentNamesPtr ktcsg)
 }
 
 static XkbComponentNamesPtr
-XkbComponentsFromRules(const char *rulesPath, const XkbRF_VarDefsPtr defs)
+XkbComponentsFromRules(const char *rules, const XkbRF_VarDefsPtr defs)
 {
-    XkbRF_RulesPtr rules;
+    FILE *rulesFile;
+    char *rulesPath;
+    XkbRF_RulesPtr loaded;
     XkbComponentNamesPtr names = NULL;
 
-    if (!(rules = XkbcRF_Load((char *)rulesPath, NULL, False, True))) {
+    rulesFile = XkbFindFileInPath((char *)rules, XkmRulesFile, &rulesPath);
+    if (!rulesFile) {
+        ERROR("could not find \"%s\" rules in XKB path\n", rules);
+        goto out;
+    }
+
+    if (!(loaded = _XkbTypedCalloc(1, XkbRF_RulesRec))) {
+        ERROR("failed to allocate XKB rules\n");
+        goto unwind_file;
+    }
+
+    if (!XkbcRF_LoadRules(rulesFile, loaded)) {
         ERROR("failed to load XKB rules \"%s\"\n", rulesPath);
-        goto fail;
+        goto unwind_rules;
     }
 
     if (!(names = _XkbTypedCalloc(1, XkbComponentNamesRec))) {
@@ -92,7 +102,7 @@ XkbComponentsFromRules(const char *rulesPath, const XkbRF_VarDefsPtr defs)
         goto unwind_rules;
     }
 
-    if (!XkbcRF_GetComponents(rules, defs, names)) {
+    if (!XkbcRF_GetComponents(loaded, defs, names)) {
         _XkbFree(names->keymap);
         _XkbFree(names->keycodes);
         _XkbFree(names->types);
@@ -105,16 +115,17 @@ XkbComponentsFromRules(const char *rulesPath, const XkbRF_VarDefsPtr defs)
     }
 
 unwind_rules:
-    XkbcRF_Free(rules, True);
-fail:
+    XkbcRF_Free(loaded, True);
+unwind_file:
+    fclose(rulesFile);
+    free(rulesPath);
+out:
     return names;
 }
 
 XkbcDescPtr
 XkbcCompileKeymapFromRules(const XkbRMLVOSet *rmlvo)
 {
-    char rulesPath[PATH_MAX];
-    int pathlen;
     XkbRF_VarDefsRec defs;
     XkbComponentNamesPtr names;
     XkbcDescPtr xkb;
@@ -124,19 +135,12 @@ XkbcCompileKeymapFromRules(const XkbRMLVOSet *rmlvo)
         return NULL;
     }
 
-    pathlen = snprintf(rulesPath, sizeof(rulesPath),
-                       DFLT_XKB_CONFIG_ROOT "/rules/%s", rmlvo->rules);
-    if (pathlen >= sizeof(rulesPath)) {
-        ERROR("XKB rules path truncated\n");
-        return NULL;
-    }
-
     defs.model = rmlvo->model;
     defs.layout = rmlvo->layout;
     defs.variant = rmlvo->variant;
     defs.options = rmlvo->options;
 
-    names = XkbComponentsFromRules(rulesPath, &defs);
+    names = XkbComponentsFromRules(rmlvo->rules, &defs);
     if (!names) {
         ERROR("failed to generate XKB components from rules \"%s\"\n",
               rmlvo->rules);
diff --git a/src/xkbcomp/xkbpath.c b/src/xkbcomp/xkbpath.c
index 45ce141..9281421 100644
--- a/src/xkbcomp/xkbpath.c
+++ b/src/xkbcomp/xkbpath.c
@@ -295,6 +295,9 @@ XkbDirectoryForInclude(unsigned type)
     case XkmGeometryIndex:
         strcpy(buf, "geometry");
         break;
+    case XkmRulesFile:
+        strcpy(buf, "rules");
+        break;
     default:
         strcpy(buf, "");
         break;
-- 
2.7.4