#!/usr/bin/env bash

# Check possible problems in the MPFR source.

# mpfrlint can be run from the tools directory
dir=`pwd`
[ -d src ] || [ "`basename "$dir"`" != tools ] || cd ..

grep '^# *include *<math\.h>' src/*.c

grep -E 'mpfr_(underflow|overflow|nanflag|inexflag|erangeflag)_p' src/*.{c,h} | \
  grep -v 'mpfr_clear_' | \
  grep -v '^src/exceptions.c:' | \
  grep -v '^src/mpfr-impl.h:#define mpfr_.*_p()' | \
  grep -v '^src/mpfr.h:__MPFR_DECLSPEC '

grep -E 'if +(test|\[).* == ' acinclude.m4 configure.ac
grep -E '="`' acinclude.m4 configure.ac

srctests=`find src tests -name '*.[ch]'`

grep GMP_LIMB_BITS $srctests

grep GMP_RND $srctests | grep -v '#define GMP_RND'

grep -E 'mp_(src)?ptr' $srctests

# Do not use __mpfr_struct structure members in .c files.
grep -E '[^0-9a-z_]_mpfr_(prec|sign|exp|d)' {src,tests}/*.c

for i in exp prec rnd
do
  grep mp_${i}_t {src,tests}/*.{c,h} | \
    grep -v "\(# *define\|# *ifndef\|typedef\) *mp_${i}_t" | \
    grep -v "\[mp_${i}_t\]"
done

sp="[[:space:]]*"
grep "MPFR_LOG_MSG$sp($sp($sp\".*\"$sp)$sp)$sp;" $srctests

# Do not use snprintf as it is not available in ISO C90.
# Even on platforms where it is available, the prototype
# may not be included (e.g. with gcc -ansi), so that the
# code may be compiled incorrectly.
grep '[^a-z_]snprintf *([^)]' $srctests

# Constant checking should use MPFR_ASSERTN, not MPFR_ASSERTD.
# This test is a heuristic.
grep 'MPFR_ASSERTD[^a-z]*;' src/*.c

# ASSERT and ASSERT_ALWAYS must not be used for assertion checking.
# Use MPFR_STAT_STATIC_ASSERT for static assertions, otherwise either
# MPFR_ASSERTD (debug mode / hint for the compiler) or MPFR_ASSERTN.
grep -E '[^_]ASSERT(_ALWAYS)? *(\(|$)' {src,tests}/*.c

# Use MPFR_TMP_LIMBS_ALLOC.
grep 'MPFR_TMP_ALLOC.*\(BYTES_PER_MP_LIMB\|sizeof.*mp_limb_t\)' src/*.c

for file in $srctests */Makefile.am acinclude.m4 configure.ac
do
  # Note: this is one less that the POSIX minimum limit in case
  # implementations are buggy like POSIX examples. :)
  perl -ne "/.{2047,}/ and print \
    \"Line \$. of file '$file' has more than 2046 bytes.\n\"" "$file"
done

# In general, one needs to include mpfr-impl.h (note that some platforms
# such as MS Windows use a config.h, which is included by mpfr-impl.h).
for file in src/*.c
do
  [ "$file" = src/jyn_asympt.c ] || \
    [ "$file" = src/round_raw_generic.c ] || \
    grep -q '^# *include *"\(mpfr-impl\|fits.*\|gen_inverse\)\.h"' $file || \
    echo "Missing '#include \"mpfr-impl.h\"' in $file?"
done

# mpfr_printf-like functions shouldn't be used in the tests,
# as they need <stdarg.h> (HAVE_STDARG defined).
for file in tests/*.c
do
  sed '/#if\(def\)\? *HAVE_STDARG/,/#\(endif\|else\) .*HAVE_STDARG/d
       /\/\*.*\*\//d
       /\/\*/,/\*\//d' $file | grep -q "mpfr_[a-z]*printf" && \
    echo "$file contains unprotected mpfr_printf-like function calls"
done

grep -E '[^a-z_](m|re)alloc *\(' tests/*.c | grep -v '^tests/memory.c:'

# Check a Texinfo rule (Section "Ending a Sentence") with common words
# that end with a capital letter:
#   Use '@.' instead of a period, '@!' instead of an exclamation point,
#   and '@?' instead of a question mark at the end of a sentence that
#   does end with a capital letter.
grep -E '(LIP|MPFR?|NaN)\)?[.!?]' doc/mpfr.texi | grep -v '^\* .*::'

fdlv1="`sed -n '/Version / {
  s/.*Version //
  s/,.*//
  p
  q
  }' doc/fdl.texi`"
fdlv2="`sed -n '/GNU Free Documentation License/ {
  s/.*Version //
  s/ or.*//
  p
  q
  }' doc/mpfr.texi`"
[ "x$fdlv1" = "x$fdlv2" ] || cat <<EOF
GFDL versions differ:
   fdl.texi: $fdlv1
  mpfr.texi: $fdlv2
EOF

tools/ck-copyright-notice
which gcc > /dev/null 2> /dev/null && tools/ck-mparam

texisvnd=`LC_ALL=C TZ=UTC svn info doc/mpfr.texi 2> /dev/null | sed -n 's/Last Changed Date:.*, [0-9]* \([A-Z][a-z][a-z] [0-9][0-9][0-9][0-9]\)).*/\1/p'`
if [ $? -eq 0 ] && [ -n "$texisvnd" ]; then
  texidate=`sed -n 's/@set UPDATED-MONTH \([A-Z][a-z][a-z]\).*\( [0-9][0-9][0-9][0-9]\)/\1\2/p' doc/mpfr.texi`
  [ "$texidate" = "$texisvnd" ] || cat <<EOF
mpfr.texi's UPDATED-MONTH seems to be incorrect:
  mpfr.texi's UPDATED-MONTH: $texidate
  Last Changed Date in WC:   $texisvnd
EOF
fi

acv1="`sed -n 's/.*autoconf \([0-9.]\+\) (at least).*/\1/p' doc/README.dev`"
acv2="`sed -n 's/AC_PREREQ(\([0-9.]\+\).*/\1/p' acinclude.m4`"
[ "x$acv1" = "x$acv2" ] || cat <<EOF
autoconf minimal versions differ:
  README.dev:   $acv1
  acinclude.m4: $acv2
EOF

cd "$dir"
"`dirname -- "$0"`"/check_inits_clears

true