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libio/bug-ungetc2.c
98 строк
2 KB
Ulrich Drepper
Update.
06 сен 2003, 13:56
06 сен 2003, 13:56
eb35b09
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#include <stdio.h> #include <sys/types.h> static int check (FILE *fp, off_t o) { int result = 0; if (feof (fp)) { puts ("feof !"); result = 1; } if (ferror (fp)) { puts ("ferror !"); result = 1; } if (ftello (fp) != o) { printf ("position = %lu, not %lu\n", (unsigned long int) ftello (fp), (unsigned long int) o); result = 1; } return result; } static int do_test (void) { FILE *fp = tmpfile (); if (fp == NULL) { puts ("tmpfile failed"); return 1; } if (check (fp, 0) != 0) return 1; puts ("going to write"); if (fputs ("hello", fp) == EOF) { puts ("fputs failed"); return 1; } if (check (fp, 5) != 0) return 1; puts ("going to rewind"); rewind (fp); if (check (fp, 0) != 0) return 1; puts ("going to read char"); int c = fgetc (fp); if (c != 'h') { printf ("read %c, not %c\n", c, 'h'); return 1; } if (check (fp, 1) != 0) return 1; puts ("going to put back"); if (ungetc (' ', fp) == EOF) { puts ("ungetc failed"); return 1; } if (check (fp, 0) != 0) return 1; puts ("going to write again"); if (fputs ("world", fp) == EOF) { puts ("2nd fputs failed"); return 1; } if (check (fp, 5) != 0) return 1; puts ("going to rewind again"); rewind (fp); if (check (fp, 0) != 0) return 1; if (fclose (fp) != 0) { puts ("fclose failed"); return 1; } return 0; } #define TEST_FUNCTION do_test () #include "../test-skeleton.c"