path: root/src/stdio/getc.c
diff options
authorRich Felker <>2012-10-27 19:52:40 -0400
committerRich Felker <>2012-10-27 19:52:40 -0400
commit8fc7b5965ac6a000c93c7362276a6a7b193647f4 (patch)
tree6ffe5b0141543fc39213a87290ec2e75a2540735 /src/stdio/getc.c
parent3ffb556c58ba69b4f52ae50fa92424300bd58bd1 (diff)
separate getc/putc from fgetc/fputc
for conformance, two functions should not have the same address. a conforming program could use the addresses of getc and fgetc in ways that assume they are distinct. normally i would just use a wrapper, but these functions are so small and performance-critical that an extra layer of function call could make the one that's a wrapper nearly twice as slow, so I'm just duplicating the code instead.
Diffstat (limited to 'src/stdio/getc.c')
1 files changed, 13 insertions, 0 deletions
diff --git a/src/stdio/getc.c b/src/stdio/getc.c
new file mode 100644
index 00000000..b3f351d1
--- /dev/null
+++ b/src/stdio/getc.c
@@ -0,0 +1,13 @@
+#include "stdio_impl.h"
+int getc(FILE *f)
+ int c;
+ if (f->lock < 0 || !__lockfile(f))
+ return getc_unlocked(f);
+ c = getc_unlocked(f);
+ __unlockfile(f);
+ return c;
+weak_alias(getc, _IO_getc);