fixed rust '\\' highlighting, among other things

3 files changed, 10 insertions, 4 deletions

diff --git a/filesystem-posix.c b/filesystem-posix.c
index 6a52732..5506278 100644
--- a/filesystem-posix.c
+++ b/filesystem-posix.c
@@ -22,10 +22,9 @@ FsType fs_path_type(char const *path) {
 }
 
 FsPermission fs_path_permission(char const *path) {
-	int bits = access(path, R_OK | W_OK);
 	FsPermission perm = 0;
-	if (!(bits & R_OK)) perm |= FS_PERMISSION_READ;
-	if (!(bits & W_OK)) perm |= FS_PERMISSION_WRITE;
+	if (access(path, R_OK) == 0) perm |= FS_PERMISSION_READ;
+	if (access(path, W_OK) == 0) perm |= FS_PERMISSION_WRITE;
 	return perm;
 }
 
diff --git a/math.c b/math.c
index d1f30dc..c7ac64b 100644
--- a/math.c
+++ b/math.c
@@ -176,7 +176,10 @@ static inline float randf(void) {
 
 static float rand_gauss(void) {
 	// https://en.wikipedia.org/wiki/Normal_distribution#Generating_values_from_normal_distribution
-	float U = randf(), V = randf();
+	float U, V;
+	do
+		U = randf(), V = randf();
+	while (U == 0 || V == 0);
 	return sqrtf(-2 * logf(U)) * cosf(TAUf * V);
 }
 
diff --git a/syntax.c b/syntax.c
index 5b06d2f..d5c79fe 100644
--- a/syntax.c
+++ b/syntax.c
@@ -394,6 +394,10 @@ static void syntax_highlight_rust(SyntaxState *state, char32_t const *line, u32
 					if (line[char_end] == '\'' && backslashes % 2 == 0) {
 						break;
 					}
+					if (line[char_end] == '\\')
+						++backslashes;
+					else
+						backslashes = 0;
 					if (line[char_end] < CHAR_MAX
 					&& line[char_end - 1] != '\\'
 					&& !strchr("abcdefABCDEF0123456789", (char)line[char_end]))