diff options
Diffstat (limited to 'libc-top-half/musl/src/stdio/ungetc.c')
-rw-r--r-- | libc-top-half/musl/src/stdio/ungetc.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/stdio/ungetc.c b/libc-top-half/musl/src/stdio/ungetc.c new file mode 100644 index 0000000..bc629d4 --- /dev/null +++ b/libc-top-half/musl/src/stdio/ungetc.c @@ -0,0 +1,20 @@ +#include "stdio_impl.h" + +int ungetc(int c, FILE *f) +{ + if (c == EOF) return c; + + FLOCK(f); + + if (!f->rpos) __toread(f); + if (!f->rpos || f->rpos <= f->buf - UNGET) { + FUNLOCK(f); + return EOF; + } + + *--f->rpos = c; + f->flags &= ~F_EOF; + + FUNLOCK(f); + return (unsigned char)c; +} |