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author | Rich Felker <dalias@aerifal.cx> | 2011-03-19 22:26:06 -0400 |
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committer | Rich Felker <dalias@aerifal.cx> | 2011-03-19 22:26:06 -0400 |
commit | a9baddd7d07b9fe15e212985a808a79773ec72e4 (patch) | |
tree | fce0a089eedeacef8b25b409c2ba50f5f30a8327 /ungetc.c | |
download | libc-testsuite-a9baddd7d07b9fe15e212985a808a79773ec72e4.tar.gz |
initial check-in, taken from old libc svn repo with significant additions
Diffstat (limited to 'ungetc.c')
-rw-r--r-- | ungetc.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/ungetc.c b/ungetc.c new file mode 100644 index 0000000..070ad92 --- /dev/null +++ b/ungetc.c @@ -0,0 +1,55 @@ +#include <stdio.h> +#include <string.h> +#include <errno.h> +#include <limits.h> +#include <unistd.h> + +#define TEST(r, f, x, m) ( \ +((r) = (f)) == (x) || \ +(printf(__FILE__ ":%d: %s failed (" m ")\n", __LINE__, #f, r, x, strerror(errno)), err++, 0) ) + +#define TEST_S(s, x, m) ( \ +!strcmp((s),(x)) || \ +(printf(__FILE__ ":%d: [%s] != [%s] (%s)\n", __LINE__, s, x, m), err++, 0) ) + +int test_ungetc(void) +{ + int i; + int err=0; + char a[100], b[100], *s; + FILE *f; + + TEST(i, !(f = tmpfile()), 0, "failed to create temp file %d!=%d (%s)"); + + if (!f) return err; + + errno=0; + TEST(i, fprintf(f, "hello, world\n"), 13, "%d != %d (%m)"); + TEST(i, fseek(f, 0, SEEK_SET), 0, "%d != %d (%m)"); + + TEST(i, feof(f), 0, "%d != %d"); + TEST(i, fgetc(f), 'h', "'%c' != '%c'"); + TEST(i, ftell(f), 1, "%d != %d"); + TEST(i, ungetc('x', f), 'x', "%d != %d"); + TEST(i, ftell(f), 0, "%d != %d"); + TEST(i, fscanf(f, "%[h]", a), 0, "got %d fields, expected %d"); + TEST(i, ftell(f), 0, "%d != %d"); + TEST(i, fgetc(f), 'x', "'%c' != '%c'"); + TEST(i, ftell(f), 1, "%d != %d"); + + TEST(i, fseek(f, 0, SEEK_SET), 0, "%d != %d"); + TEST(i, ungetc('x', f), 'x', "%d != %d"); + TEST(i, fread(a, 1, sizeof a, f), 14, "read %d, expected %d"); + a[14] = 0; + TEST_S(a, "xhello, world\n", "mismatch reading ungot character"); + + TEST(i, fseek(f, 0, SEEK_SET), 0, "%d != %d"); + TEST(i, fscanf(f, "%[x]", a), 0, "got %d fields, expected %d"); + TEST(i, ungetc('x', f), 'x', "unget failed after fscanf: %d != %d"); + TEST(i, fgetc(f), 'x', "'%c' != '%c'"); + TEST(i, fgetc(f), 'h', "'%c' != '%c'"); + + fclose(f); + + return err; +} |