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Side by Side Diff: fusl/src/stdio/ungetc.c

Issue 1573973002: Add a "fork" of musl as //fusl. (Closed) Base URL: https://github.com/domokit/mojo.git@master
Patch Set: Created 4 years, 11 months ago
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1 #include "stdio_impl.h"
2
3 int ungetc(int c, FILE *f)
4 {
5 if (c == EOF) return c;
6
7 FLOCK(f);
8
9 if (!f->rpos) __toread(f);
10 if (!f->rpos || f->rpos <= f->buf - UNGET) {
11 FUNLOCK(f);
12 return EOF;
13 }
14
15 *--f->rpos = c;
16 f->flags &= ~F_EOF;
17
18 FUNLOCK(f);
19 return c;
20 }
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