This is used later in the kit by the selftests for final.c
gcc/ChangeLog:
* selftest.c (selftest::read_file): New function.
(selftest::test_read_file): New function.
(selftest::selftest_c_tests): Call test_read_file.
* selftest.h (selftest::read_file): New decl.
---
gcc/selftest.c | 60 ++
gcc/selftest.h | 7 +++
2 files changed, 67 insertions(+)
diff --git a/gcc/selftest.c b/gcc/selftest.c
index 0db69d2..cf7031f 100644
--- a/gcc/selftest.c
+++ b/gcc/selftest.c
@@ -151,6 +151,53 @@ temp_source_file::temp_source_file (const location ,
fclose (out);
}
+/* Read the contents of PATH into memory, returning a 0-terminated buffer
+ that must be freed by the caller.
+ Fail (and abort) if there are any problems, with LOC as the reported
+ location of the failure. */
+
+char *
+read_file (const location , const char *path)
+{
+ FILE *f_in = fopen (path, "r");
+ if (!f_in)
+fail_formatted (loc, "unable to open file: %s", path);
+
+ /* Read content, allocating FIXME. */
+ char *result = NULL;
+ size_t total_sz = 0;
+ size_t alloc_sz = 0;
+ char buf[4096];
+ size_t iter_sz_in;
+
+ while ( (iter_sz_in = fread (buf, 1, sizeof (buf), f_in)) )
+{
+ gcc_assert (alloc_sz >= total_sz);
+ size_t old_total_sz = total_sz;
+ total_sz += iter_sz_in;
+ /* Allow 1 extra byte for 0-termination. */
+ if (alloc_sz < (total_sz + 1))
+ {
+ size_t new_alloc_sz = alloc_sz ? alloc_sz * 2: total_sz + 1;
+ result = (char *)xrealloc (result, new_alloc_sz);
+ alloc_sz = new_alloc_sz;
+ }
+ memcpy (result + old_total_sz, buf, iter_sz_in);
+}
+
+ if (!feof (f_in))
+fail_formatted (loc, "error reading from %s: %s", path,
+ xstrerror (errno));
+
+ fclose (f_in);
+
+ /* 0-terminate the buffer. */
+ gcc_assert (total_sz < alloc_sz);
+ result[total_sz] = '\0';
+
+ return result;
+}
+
/* Selftests for the selftest system itself. */
/* Sanity-check the ASSERT_ macros with various passing cases. */
@@ -181,6 +228,18 @@ test_named_temp_file ()
fclose (f);
}
+/* Verify read_file (and also temp_source_file). */
+
+static void
+test_read_file ()
+{
+ temp_source_file t (SELFTEST_LOCATION, "test1.s",
+ "\tjmp\t.L2\n");
+ char *buf = read_file (SELFTEST_LOCATION, t.get_filename ());
+ ASSERT_STREQ ("\tjmp\t.L2\n", buf);
+ free (buf);
+}
+
/* Run all of the selftests within this file. */
void
@@ -188,6 +247,7 @@ selftest_c_tests ()
{
test_assertions ();
test_named_temp_file ();
+ test_read_file ();
}
} // namespace selftest
diff --git a/gcc/selftest.h b/gcc/selftest.h
index 3938560..e5f5c60 100644
--- a/gcc/selftest.h
+++ b/gcc/selftest.h
@@ -146,6 +146,13 @@ class line_table_test
extern void
for_each_line_table_case (void (*testcase) (const line_table_case &));
+/* Read the contents of PATH into memory, returning a 0-terminated buffer
+ that must be freed by the caller.
+ Fail (and abort) if there are any problems, with LOC as the reported
+ location of the failure. */
+
+extern char *read_file (const location , const char *path);
+
/* Declarations for specific families of tests (by source file), in
alphabetical order. */
extern void bitmap_c_tests ();
--
1.8.5.3
