patch/tests/preserve-c-function-names

# Copyright 2009-2025 Free Software Foundation, Inc.
#
# Copying and distribution of this file, with or without modification,
# in any medium, are permitted without royalty provided the copyright
# notice and this notice are preserved.

# Preserve the "diff -p" output in reject files

. $srcdir/test-lib.sh

require cat
use_local_patch
use_tmpdir

cat > a <<EOF
int foo()
  {
    /* waste a line */

    return 1;
  }
EOF

cat > b <<EOF
int foo()
  {
    /* waste a line */

    return 2;
  }
EOF

preserve_trailing_blank=

cat > ab.diff <<EOF
*** a
--- b
*************** int foo()
*** 2,6 ****
    {
      /* waste a line */
  $preserve_trailing_blank
!     return 1;
    }
--- 2,6 ----
    {
      /* waste a line */
  $preserve_trailing_blank
!     return 2;
    }
EOF
touch c
check 'patch c < ab.diff || cat c.rej' <<EOF
patching file c
Hunk #1 FAILED at 2.
1 out of 1 hunk FAILED -- saving rejects to file c.rej
*** a
--- b
*************** int foo()
*** 2,6 ****
    {
      /* waste a line */
  $preserve_trailing_blank
!     return 1;
    }
--- 2,6 ----
    {
      /* waste a line */
  $preserve_trailing_blank
!     return 2;
    }
EOF