fix wrong result for putc variants due to operator precedence

[musl] / src / internal / stdio_impl.h

diff --git a/src/internal/stdio_impl.h b/src/internal/stdio_impl.h
index 92f7be6..4449734 100644 (file)
--- a/src/internal/stdio_impl.h
+++ b/src/internal/stdio_impl.h
@@ -3,7 +3,6 @@
 
 #include <stdio.h>
 #include "syscall.h"
-#include "libc.h"
 
 #define UNGET 8
 
@@ -54,6 +53,9 @@ extern hidden FILE *volatile __stdin_used;
 extern hidden FILE *volatile __stdout_used;
 extern hidden FILE *volatile __stderr_used;
 
+hidden int __lockfile(FILE *);
+hidden void __unlockfile(FILE *);
+
 hidden size_t __stdio_read(FILE *, unsigned char *, size_t);
 hidden size_t __stdio_write(FILE *, const unsigned char *, size_t);
 hidden size_t __stdout_write(FILE *, const unsigned char *, size_t);
@@ -92,16 +94,18 @@ hidden void __register_locked_file(FILE *, struct __pthread *);
 hidden void __unlist_locked_file(FILE *);
 hidden void __do_orphaned_stdio_locks(void);
 
+#define MAYBE_WAITERS 0x40000000
+
 hidden void __getopt_msg(const char *, const char *, const char *, size_t);
 
 #define feof(f) ((f)->flags & F_EOF)
 #define ferror(f) ((f)->flags & F_ERR)
 
 #define getc_unlocked(f) \
-       ( ((f)->rpos < (f)->rend) ? *(f)->rpos++ : __uflow((f)) )
+       ( ((f)->rpos != (f)->rend) ? *(f)->rpos++ : __uflow((f)) )
 
 #define putc_unlocked(c, f) \
-       ( ((unsigned char)(c)!=(f)->lbf && (f)->wpos<(f)->wend) \
+       ( (((unsigned char)(c)!=(f)->lbf && (f)->wpos!=(f)->wend)) \
        ? *(f)->wpos++ = (c) : __overflow((f),(c)) )
 
 /* Caller-allocated FILE * operations */