[PATCH 6/6] winetest: Hash the test source to generate stable IDs.

[Rémi Bernon]

From: Rémi Bernon

This hashes 5 lines of source code before and after the check, to create
unique identifier for each test that is more robust to moving code and
modified line numbers.
---
 programs/winetest/main.c | 47 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 46 insertions(+), 1 deletion(-)

diff --git a/programs/winetest/main.c b/programs/winetest/main.c
index 90e9bbad2eb..00a5e715c5d 100644
--- a/programs/winetest/main.c
+++ b/programs/winetest/main.c
@@ -36,6 +36,18 @@
 #include "winetest.h"
 #include "resource.h"

+typedef struct
+{
+   ULONG Unknown[6];
+   ULONG State[5];
+   ULONG Count[2];
+   UCHAR Buffer[64];
+} SHA_CTX;
+
+VOID WINAPI A_SHAInit(SHA_CTX *ctx);
+VOID WINAPI A_SHAUpdate(SHA_CTX *ctx, const UCHAR *buffer, UINT size);
+VOID WINAPI A_SHAFinal(SHA_CTX *ctx, PULONG result);
+
 /* Don't submit the results if more than SKIP_LIMIT tests have been skipped */
 #define SKIP_LIMIT 10

@@ -69,6 +81,7 @@ static BOOL is_wow64;
 static int failures;
 static int quiet_mode;
 static int junit_mode;
+static int context_lines = 5;

/* filters for running only specific tests */
 static char **filters;
@@ -896,6 +909,36 @@ static char *strescape( const char *src, const char *end, int comment )
     return dst;
 }

+static char *get_test_name( HMODULE module, const char *src, int num, int *size )
+{
+    const char *source, *next, *line;
+    ULONG sha1_hash[5];
+    HGLOBAL handle;
+    SHA_CTX ctx;
+    HRSRC rsrc;
+
+    if (!(rsrc = FindResourceA( module, src, "TESTSRC" ))) return NULL;
+    if (!(*size = SizeofResource( module, rsrc ))) return NULL;
+    if (!(handle = LoadResource( module, rsrc))) return NULL;
+    if (!(source = LockResource( handle ))) return NULL;
+
+    A_SHAInit( &ctx );
+    for (line = next = source; line < source + *size; line = next)
+    {
+        if ((next = memchr( next, '\n', source + *size - next ))) next += 1;
+        else next = source + *size;
+
+        if (--num > context_lines) continue;
+        A_SHAUpdate( &ctx, (BYTE *)line, next - line );
+        while (line < next && (*line == ' ' || *line == '\t')) line++;
+        if (num <= -context_lines) break;
+    }
+    A_SHAFinal( &ctx, sha1_hash );
+
+    if (num > context_lines) return NULL;
+    return strmake( NULL, "%08x%08x%08x%08x%08x", sha1_hash[0], sha1_hash[1], sha1_hash[2], sha1_hash[3], sha1_hash[4] );
+}
+
 static void report_test_start( struct wine_test *test, const char *subtest, const char *file )
 {
     report( R_STEP, "Running: %s:%s", test->name, subtest );
@@ -907,6 +950,7 @@ static void report_test_done( struct wine_test *test, const char *subtest, const
 {
     if (junit_mode)
     {
+        HMODULE module = LoadLibraryExA( test->exename, NULL, LOAD_LIBRARY_AS_DATAFILE );
         int total = 0, fail_total = 0, skip_total = 0, failures = 0;
         const char *next, *line, *ptr, *dir = strrchr( file, '/' );
         float time, last_time = 0;
@@ -960,7 +1004,7 @@ static void report_test_done( struct wine_test *test, const char *subtest, const
             if (!(ptr = strchr( line, ' ' ))) continue;
             ptr++;

-            name = strmake( NULL, "%s:%d", src, n );
+            if (!(name = get_test_name( module, src, n, &len ))) name = strmake( NULL, "%s:%d", src, n );
             for (i = 0; i < ARRAY_SIZE(patterns); i++)
             {
                 if (!strncmp( ptr, patterns[i].pattern, patterns[i].length ))
@@ -1003,6 +1047,7 @@ static void report_test_done( struct wine_test *test, const char *subtest, const
         }

xprintf( "  </testsuite>\n" );
+        FreeLibrary( module );
     }
     else
     {