mirror of
https://github.com/jart/cosmopolitan.git
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100 lines
4.1 KiB
C
100 lines
4.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/nexgen32e/crc32.h"
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/rand.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/testlib/hyperion.h"
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#include "libc/testlib/testlib.h"
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FILE *f;
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char buf[512];
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char testlib_enable_tmp_setup_teardown;
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TEST(ungetc, testGetChar_canBeUndoneWithinReason) {
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ASSERT_NE(NULL, (f = fopen("hog", "wb")));
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EXPECT_EQ(12, fputs("hello world\n", f));
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EXPECT_NE(-1, fputs(kHyperion, f));
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EXPECT_EQ(0, fclose(f));
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ASSERT_NE(NULL, (f = fopen("hog", "r")));
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EXPECT_EQ('h', fgetc(f));
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EXPECT_EQ('e', fgetc(f));
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EXPECT_EQ('e', ungetc('e', f));
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EXPECT_EQ('h', ungetc('h', f));
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EXPECT_EQ(5, fread(buf, 1, 5, f));
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EXPECT_BINEQ(u"hello", buf);
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EXPECT_EQ(0, fclose(f));
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}
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TEST(ungetc, testRead_canBeUndoneWithinReason) {
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ASSERT_NE(NULL, (f = fopen("hog", "wb")));
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EXPECT_EQ(12, fputs("hello world\n", f));
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EXPECT_EQ(0, fclose(f));
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ASSERT_NE(NULL, (f = fopen("hog", "r")));
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EXPECT_EQ(3, fread(buf, 1, 3, f));
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EXPECT_BINEQ(u"hel", buf);
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EXPECT_EQ('l', ungetc(buf[2], f));
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EXPECT_EQ('e', ungetc(buf[1], f));
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EXPECT_EQ(4, fread(buf, 1, 4, f));
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EXPECT_BINEQ(u"ello", buf);
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EXPECT_EQ(0, fclose(f));
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}
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TEST(ungetwc, testGetWideChar_canBeUndoneWithinReason) {
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memset(buf, 0, sizeof(buf));
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ASSERT_NE(NULL, (f = fopen("hog", "wb")));
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EXPECT_NE(-1, fputs("𐌰𐌱\n", f));
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EXPECT_EQ(0, fclose(f));
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ASSERT_NE(NULL, (f = fopen("hog", "r")));
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EXPECT_EQ(L'𐌰', fgetwc(f));
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EXPECT_EQ(L'𐌱', fgetwc(f));
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EXPECT_EQ(L'𐌱', ungetwc(L'𐌱', f));
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EXPECT_EQ(L'𐌰', ungetwc(L'𐌰', f));
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EXPECT_NE(0, fread(buf, 1, sizeof(buf), f));
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EXPECT_STREQ("𐌰𐌱\n", buf);
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EXPECT_EQ(0, fclose(f));
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}
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TEST(ungetc, io) {
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static char b1[BUFSIZ * 2];
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static char b2[BUFSIZ * 2];
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for (int i = 0; i < sizeof(b1); ++i) {
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b1[i] = rand();
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}
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FILE *f = tmpfile();
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fwrite(b1, 1, sizeof(b1), f);
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rewind(f);
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for (int i = 0; i < sizeof(b1); ++i) {
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int c;
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ASSERT_NE(EOF, (c = fgetc(f)));
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ASSERT_EQ(c, ungetc(c, f));
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ASSERT_EQ(c, fgetc(f));
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b2[i] = c;
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if (rand() % 10 == 0) {
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ASSERT_NE(EOF, fflush(f));
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ASSERT_NE(i, lseek(fileno(f), 0, SEEK_CUR));
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}
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}
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ASSERT_EQ(EOF, fgetc(f));
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fclose(f);
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ASSERT_EQ(crc32c(0, b1, sizeof(b1)), crc32c(0, b2, sizeof(b2)));
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}
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