chore: allow to skip specific simd test using environment variable

test/benchmark.c

@@ -271,10 +271,12 @@ main ()
 			sizes[i].label, sizes[i].repeat, sizes[i].batch);
 
 		// Loop over all codecs:
-		for (size_t j = 0; codecs[j]; j++)
-			if (codec_supported(1 << j))
-				codec_bench(&b, &sizes[i], codecs[j], 1 << j);
-	};
+		for (size_t j = 0; codecs[j]; j++) {
+			int flags = codec_supported(j);
+			if (flags)
+				codec_bench(&b, &sizes[i], codecs[j], flags);
+		}
+	}
 
 	// Free memory:
 err2:	free(b.enc);

test/codec_supported.c

@@ -1,3 +1,4 @@
+#include <stdlib.h>
 #include <string.h>
 
 #include "../include/libbase64.h"
@@ -18,12 +19,22 @@ static char *_codecs[] =
 char **codecs = _codecs;
 
 int
-codec_supported (int flags)
+codec_supported (size_t index)
 {
+	if (index >= (sizeof(_codecs) / sizeof(_codecs[0])) - 1) {
+		return 0;
+	}
 	// Check if given codec is supported by trying to decode a test string:
 	char *a = "aGVsbG8=";
 	char b[10];
 	size_t outlen;
+	char envVariable[32];
 
-	return (base64_decode(a, strlen(a), b, &outlen, flags) != -1);
+	sprintf(envVariable, "BASE64_TEST_SKIP_%s", _codecs[index]);
+	const char* envOverride = getenv(envVariable);
+	if (envOverride != NULL) {
+		return 0;
+	}
+	int flags = 1 << index;
+	return (base64_decode(a, strlen(a), b, &outlen, flags) != -1) ? flags : 0;
 }

test/codec_supported.h

@@ -1,3 +1,3 @@
 extern char **codecs;
 
-int codec_supported (int flags);
+int codec_supported (size_t index);

test/test_base64.c

@@ -313,14 +313,16 @@ test_invalid_dec_input (int flags)
 }
 
 static int
-test_one_codec (const char *codec, int flags)
+test_one_codec (size_t codec_index)
 {
 	bool fail = false;
+	const char *codec = codecs[codec_index];
 
 	printf("Codec %s:\n", codec);
 
 	// Skip if this codec is not supported:
-	if (!codec_supported(flags)) {
+	int flags = codec_supported(codec_index);
+	if (flags == 0) {
 		puts("  skipping");
 		return false;
 	}
@@ -376,12 +378,8 @@ main ()
 
 	// Loop over all codecs:
 	for (size_t i = 0; codecs[i]; i++) {
-
-		// Flags to invoke this codec:
-		int codec_flags = (1 << i);
-
 		// Test this codec, merge the results:
-		fail |= test_one_codec(codecs[i], codec_flags);
+		fail |= test_one_codec(i);
 	}
 
 	return (fail) ? 1 : 0;