Blame src/stdio/memstream.c

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#include <stdlib.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include "test.h"
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#define TEST(r, f, x, m) ( \
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((r) = (f)) == (x) || \
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(error("%s failed (" m ")\n", #f, r, x), 0) )
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#define TEST_E(f) ( (errno = 0), (f) || \
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(error("%s failed (errno = %d)\n", #f, errno), 0) )
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#define TEST_S(s, x, m) ( \
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!strcmp((s),(x)) || \
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(error("[%s] != [%s] (%s)\n", s, x, m), 0) )
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#define TEST_M(s, x, n, m) ( \
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!memcmp((s),(x),(n)) || \
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(error("[%s] != [%s] (%s)\n", s, x, m), 0) )
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void test_memstream(void)
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{
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	FILE *f;
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	char *s;
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	size_t l;
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	char buf[100];
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	int i;
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	s = 0;
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	TEST_E(f = open_memstream(&s, &l);;
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	TEST_E(putc('a', f) == 'a');
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	TEST_E(putc('b', f) == 'b');
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	TEST_E(putc('c', f) == 'c');
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	TEST_E(!fflush(f));
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	fclose(f);
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	if (s) TEST_S(s, "abc", "wrong output");
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	free(s);
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	s = 0;
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	TEST_E(f = open_memstream(&s, &l);;
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	TEST_E(fseek(f,1,SEEK_CUR)>=0);
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	TEST_E(putc('q', f) == 'q');
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	TEST_E(!fflush(f));
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	if (s) TEST_M(s, "\0q", 3, "wrong output");
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	TEST(i, fseek(f,-3,SEEK_CUR), -1, "invalid seek allowed");
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	TEST(i, errno, EINVAL, "%d != %d");
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	TEST(i, ftell(f), 2, "%d != %d");
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	TEST_E(fseek(f,-2,SEEK_CUR)>=0);
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	TEST_E(putc('e', f) == 'e');
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	TEST_E(!fflush(f));
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	if (s) TEST_S(s, "eq", "wrong output");
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	fclose(f);
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	free(s);
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	TEST_E(f = fmemopen(buf, 10, "r+"));
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	TEST_E(fputs("hello", f) >= 0);
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	TEST_E(fputc(0, f)==0);
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	TEST_E(fseek(f, 0, SEEK_SET)>=0);
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	i=0;
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	TEST_E(fscanf(f, "hello%n", &i)==0);
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	TEST(i, i, 5, "%d != %d");
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	TEST(i, ftell(f), 5, "%d != %d");
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	errno = 0;
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	TEST(i, fseek(f, 6, SEEK_CUR)<0, 1, "");
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	TEST(i, errno!=0, 1, "");
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	TEST(i, ftell(f), 5, "%d != %d");
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	TEST_S(buf, "hello", "");
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	fclose(f);
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	TEST_E(f = fmemopen(buf, 10, "a+"));
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	TEST(i, ftell(f), 5, "%d != %d");
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	TEST_E(fseek(f, 0, SEEK_SET)>=0);
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	TEST(i, getc(f), 'h', "%d != %d");
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	TEST(i, getc(f), 'e', "%d != %d");
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	TEST(i, getc(f), 'l', "%d != %d");
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	TEST(i, getc(f), 'l', "%d != %d");
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	TEST(i, getc(f), 'o', "%d != %d");
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	TEST(i, getc(f), EOF, "%d != %d");
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	TEST_E(fseek(f, 6, SEEK_SET)>=0);
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	TEST(i, ftell(f), 6, "%d != %d");
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	TEST(i, getc(f), EOF, "%d != %d");
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	TEST(i, ftell(f), 6, "%d != %d");
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	TEST_E(fseek(f, 0, SEEK_SET)>=0);
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	TEST(i, getc(f), 'h', "%d != %d");
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	TEST_E(fseek(f, 0, SEEK_CUR)>=0);
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	buf[7] = 'x';
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	TEST_E(fprintf(f, "%d", i)==3);
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	TEST_E(fflush(f)==0);
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	TEST(i, ftell(f), 8, "%d != %d");
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	TEST_S(buf, "hello104", "");
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	fclose(f);
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}