Move the sorting of code-completion results out of the main path and

into the clients, e.g., the printing code-completion consumer and
c-index-test. Clients may want to re-sort the results anyway.

Provide a libclang function that sorts the results.

llvm-svn: 112149

clang/include/clang-c/Index.h

@@ -2349,6 +2349,17 @@ CXCodeCompleteResults *clang_codeCompleteAt(CXTranslationUnit TU,
                                             unsigned num_unsaved_files,
                                             unsigned options);
 
+/**
+ * \brief Sort the code-completion results in case-insensitive alphabetical 
+ * order.
+ *
+ * \param Results The set of results to sort.
+ * \param NumResults The number of results in \p Results.
+ */
+CINDEX_LINKAGE
+void clang_sortCodeCompletionResults(CXCompletionResult *Results,
+                                     unsigned NumResults);
+  
 /**
  * \brief Free the given set of code-completion results.
  */

clang/lib/Frontend/ASTUnit.cpp

@@ -1678,9 +1678,7 @@ void AugmentedCodeCompleteConsumer::ProcessCodeCompleteResults(Sema &S,
     Next.ProcessCodeCompleteResults(S, Context, Results, NumResults);
     return;
   }
-
-  // Sort the completion results before passing them on to the actual consumer.
-  std::stable_sort(AllResults.begin(), AllResults.end());
+  
   Next.ProcessCodeCompleteResults(S, Context, AllResults.data(),
                                   AllResults.size());
   

clang/lib/Sema/CodeCompleteConsumer.cpp

@@ -443,6 +443,8 @@ PrintingCodeCompleteConsumer::ProcessCodeCompleteResults(Sema &SemaRef,
                                                  CodeCompletionContext Context,
                                                  CodeCompletionResult *Results,
                                                          unsigned NumResults) {
+  std::stable_sort(Results, Results + NumResults);
+  
   // Print the results.
   for (unsigned I = 0; I != NumResults; ++I) {
     OS << "COMPLETION: ";
@@ -660,6 +662,11 @@ bool clang::operator<(const CodeCompletionResult &X,
   if (cmp)
     return cmp < 0;
   
+  // If case-insensitive comparison fails, try case-sensitive comparison.
+  cmp = XStr.compare(YStr);
+  if (cmp)
+    return cmp < 0;
+
   // Non-hidden names precede hidden names.
   if (X.Hidden != Y.Hidden)
     return !X.Hidden;
@@ -695,7 +702,7 @@ CIndexCodeCompleteConsumer::ProcessOverloadCandidates(Sema &SemaRef,
                                                        unsigned NumCandidates) {
   for (unsigned I = 0; I != NumCandidates; ++I) {
     WriteUnsigned(OS, CXCursor_NotImplemented);
-    WriteUnsigned(OS, /*Priority=*/0);
+    WriteUnsigned(OS, /*Priority=*/I);
     WriteUnsigned(OS, /*Availability=*/CXAvailability_Available);
     CodeCompletionString *CCS
       = Candidates[I].CreateSignatureString(CurrentArg, SemaRef);

clang/lib/Sema/SemaCodeComplete.cpp

@@ -2277,8 +2277,6 @@ static void HandleCodeCompleteResults(Sema *S,
                                       CodeCompletionContext Context,
                                       CodeCompletionResult *Results,
                                       unsigned NumResults) {
-  std::stable_sort(Results, Results + NumResults);
-
   if (CodeCompleter)
     CodeCompleter->ProcessCodeCompleteResults(*S, Context, Results, NumResults);
   

clang/tools/c-index-test/c-index-test.c

@@ -1,6 +1,7 @@
 /* c-index-test.c */
 
 #include "clang-c/Index.h"
+#include <ctype.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
@@ -903,6 +904,25 @@ void print_completion_result(CXCompletionResult *completion_result,
   fprintf(file, "\n");
 }
 
+int my_stricmp(const char *s1, const char *s2) {
+  while (*s1 && *s2) {
+    int c1 = tolower(*s1), c2 = tolower(*s2);
+    if (c1 < c2)
+      return -1;
+    else if (c1 > c2)
+      return 1;
+    
+    ++s1;
+    ++s2;
+  }
+  
+  if (*s1)
+    return 1;
+  else if (*s2)
+    return -1;
+  return 0;
+}
+
 int perform_code_completion(int argc, const char **argv, int timing_only) {
   const char *input = argv[1];
   char *filename = 0;
@@ -958,9 +978,13 @@ int perform_code_completion(int argc, const char **argv, int timing_only) {
 
   if (results) {
     unsigned i, n = results->NumResults;
-    if (!timing_only)
+    if (!timing_only) {      
+      /* Sort the code-completion results based on the typed text. */
+      clang_sortCodeCompletionResults(results->Results, results->NumResults);
+
       for (i = 0; i != n; ++i)
         print_completion_result(results->Results + i, stdout);
+    }
     n = clang_codeCompleteGetNumDiagnostics(results);
     for (i = 0; i != n; ++i) {
       CXDiagnostic diag = clang_codeCompleteGetDiagnostic(results, i);

clang/tools/libclang/CIndexCodeCompletion.cpp

@@ -582,6 +582,8 @@ namespace {
         AllocatedResults.Results[I].CompletionString = StoredCompletion;
       }
     }
+    
+    // FIXME: Add ProcessOverloadCandidates?
   };
 }
 
@@ -784,3 +786,36 @@ clang_codeCompleteGetDiagnostic(CXCodeCompleteResults *ResultsIn,
 
 
 } // end extern "C"
+
+namespace {
+  struct OrderCompletionResults {
+    bool operator()(const CXCompletionResult &XR, 
+                    const CXCompletionResult &YR) const {
+      CXStoredCodeCompletionString *X
+        = (CXStoredCodeCompletionString *)XR.CompletionString;
+      CXStoredCodeCompletionString *Y
+        = (CXStoredCodeCompletionString *)YR.CompletionString;
+      
+      const char *XText = X->getTypedText();
+      const char *YText = Y->getTypedText();
+      if (!XText || !YText)
+        return XText != 0;
+      
+      int result = llvm::StringRef(XText).compare_lower(YText);
+      if (result < 0)
+        return true;
+      if (result > 0)
+        return false;
+      
+      result = llvm::StringRef(XText).compare(YText);
+      return result;
+    }
+  };
+}
+
+extern "C" {
+  void clang_sortCodeCompletionResults(CXCompletionResult *Results,
+                                       unsigned NumResults) {
+    std::stable_sort(Results, Results + NumResults, OrderCompletionResults());
+  }
+}

clang/tools/libclang/libclang.darwin.exports

@@ -99,5 +99,6 @@ _clang_parseTranslationUnit
 _clang_reparseTranslationUnit
 _clang_saveTranslationUnit
 _clang_setUseExternalASTGeneration
+_clang_sortCodeCompletionResults
 _clang_tokenize
 _clang_visitChildren

clang/tools/libclang/libclang.exports

@@ -99,5 +99,6 @@ clang_parseTranslationUnit
 clang_reparseTranslationUnit
 clang_saveTranslationUnit
 clang_setUseExternalASTGeneration
+clang_sortCodeCompletionResults
 clang_tokenize
 clang_visitChildren