[deliverable/binutils-gdb.git] / binutils / testsuite / lib / binutils-common.exp

# Copyright (C) 1993-2018 Free Software Foundation, Inc.
#
# This file is part of the GNU Binutils.
#
# This file is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
# MA 02110-1301, USA.

# True if the object format is known to be ELF.
#
proc is_elf_format {} {
    # config.sub for these targets curiously transforms a target doublet
    # ending in -elf to -none.  eg. m68hc12-elf to m68hc12-unknown-none
    # They are always elf.
    if { [istarget m68hc1*-*] || [istarget xgate-*] } {
	return 1;
    }

    if {    ![istarget *-*-eabi*]
	 && ![istarget *-*-elf*]
	 && ![istarget *-*-freebsd*]
	 && ![istarget *-*-gnu*]
	 && ![istarget *-*-irix5*]
	 && ![istarget *-*-irix6*]
	 && ![istarget *-*-linux*]
	 && ![istarget *-*-lynxos*]
	 && ![istarget *-*-nacl*]
	 && ![istarget *-*-netbsd*]
	 && ![istarget *-*-openbsd*]
	 && ![istarget *-*-rtems*]
	 && ![istarget *-*-solaris2*]
	 && ![istarget *-*-symbianelf*]
	 && ![istarget *-*-sysv4*]
	 && ![istarget *-*-unixware*]
	 && ![istarget *-*-wasm32*]
	 && ![istarget avr-*-*]
	 && ![istarget bfin-*-uclinux]
	 && ![istarget frv-*-uclinux*]
	 && ![istarget hppa*64*-*-hpux*]
	 && ![istarget ia64-*-hpux*]
	 && ![istarget sh*-*-uclinux*]
	 && ![istarget tic6x*-*-uclinux*] } {
	return 0
    }

    if {    [istarget *-*-linux*aout*]
	 || [istarget *-*-linux*ecoff*]
	 || [istarget *-*-linux*oldld*]
	 || [istarget *-*-rtemscoff*]
	 || [istarget i?86-*-freebsd\[12\].*] } {
	return 0
    }

    if { ![istarget *-*-netbsdelf*]
	 && (   [istarget *-*-netbsd*aout*]
	     || [istarget *-*-netbsdpe*]
	     || [istarget arm*-*-netbsd*]
	     || [istarget sparc-*-netbsd*]
	     || [istarget i*86-*-netbsd*]
	     || [istarget m68*-*-netbsd*]
	     || [istarget vax-*-netbsd*]
	     || [istarget ns32k-*-netbsd*]) } {
    	return 0
    }

    if {    [istarget arm-*-openbsd*]
	 || [istarget i386-*-openbsd\[0-2\].*]
	 || [istarget i386-*-openbsd3.\[0-2\]]
	 || [istarget m68*-*-openbsd*]
	 || [istarget ns32k-*-openbsd*]
	 || [istarget sparc-*-openbsd\[0-2\].*]
	 || [istarget sparc-*-openbsd3.\[0-1\]]
	 || [istarget vax-*-openbsd*] } {
	return 0
    }

    return 1
}

# True if the object format is known to be a.out.
#
proc is_aout_format {} {
    if { [istarget *-*-netbsdelf]
	 || [istarget sparc64-*-netbsd*]
	 || [istarget sparc64-*-openbsd*] } {
	return 0
    }
    if { [istarget *-*-*\[ab\]out*]
	 || [istarget *-*-linux*oldld*]
	 || [istarget *-*-bsd*]
	 || [istarget *-*-msdos*]
	 || [istarget arm-*-netbsd*]
	 || [istarget arm-*-openbsd*]
	 || [istarget arm-*-riscix*]
	 || [istarget i?86-*-freebsd\[12\].*]
	 || [istarget i?86-*-netbsd*]
	 || [istarget i?86-*-openbsd\[0-2\]*]
	 || [istarget i?86-*-openbsd3.\[0-2\]*]
	 || [istarget i?86-*-vsta]
	 || [istarget i?86-*-mach*]
	 || [istarget m68*-*-netbsd*]
	 || [istarget m68*-*-openbsd*]
	 || [istarget ns32k-*-*]
	 || [istarget pdp11-*-*]
	 || [istarget sparc*-*-sunos4*]
	 || [istarget sparc*-*-netbsd*]
	 || [istarget sparc*-*-openbsd\[0-2\]*]
	 || [istarget sparc*-*-openbsd3.\[0-1\]*]
	 || [istarget sparc*-fujitsu-none]
	 || [istarget vax-dec-ultrix*]
	 || [istarget vax-*-netbsd] } {
	return 1
    }
    return 0
}

# True if the object format is known to be PE COFF.
#
proc is_pecoff_format {} {
    if { ![istarget *-*-mingw*]
	 && ![istarget *-*-cygwin*]
	 && ![istarget *-*-cegcc*]
	 && ![istarget *-*-pe*] } {
	return 0
    }

    return 1
}

# True if the object format is known to be 64-bit ELF.
#
proc is_elf64 { binary_file } {
    global READELF
    global READELFFLAGS

    set readelf_size ""
    catch "exec $READELF $READELFFLAGS -h $binary_file > readelf.out" got

    if ![string match "" $got] then {
	return 0
    }

    if { ![regexp "\n\[ \]*Class:\[ \]*ELF(\[0-9\]+)\n" \
	   [file_contents readelf.out] nil readelf_size] } {
	return 0
    }

    if { $readelf_size == "64" } {
	return 1
    }

    return 0
}

# True if the ELF target supports STB_GNU_UNIQUE with the ELF header's
# OSABI field set to ELFOSABI_GNU.
#
# This generally depends on the target OS only, however there are a
# number of exceptions for bare metal targets as follows.  The MSP430
# and Visium targets set OSABI to ELFOSABI_STANDALONE and cannot
# support STB_GNU_UNIQUE.  Likewise non-EABI ARM targets set OSABI to
# ELFOSABI_ARM, and TI C6X targets to ELFOSABI_C6000_*.  Finally
# rather than `bfd_elf_final_link' AM33/2.0, D30V, DLX, and
# picoJava targets use `_bfd_generic_final_link', which does not
# support STB_GNU_UNIQUE symbol binding causing assertion failures.
#
proc supports_gnu_unique {} {
    if { [istarget *-*-gnu*]
	 || [istarget *-*-linux*]
	 || [istarget *-*-nacl*] } {
	return 1
    }
    if { [istarget "arm*-*-*eabi*"] } {
	return 1
    }
    if { [istarget "wasm32*-*-*"] } {
        return 1
    }
    if { ![istarget "*-*-elf*"] } {
	return 0
    }
    if { [istarget "arm*-*-*"]
	 || [istarget "msp430-*-*"]
	 || [istarget "tic6x-*-*"]
	 || [istarget "visium-*-*"] } {
	return 0
    }
    if { [istarget "am33_2.0-*-*"]
	 || [istarget "d30v-*-*"]
	 || [istarget "dlx-*-*"]
	 || [istarget "pj*-*-*"] } {
	return 0
    }
    return 1
}

# True for targets that do not sort .symtab as per the ELF standard.
# ie. any that have mips_elf32_be_vec, mips_elf32_le_vec,
# mips_elf32_n_be_vec or mips_elf32_n_le_vec as the primary bfd target
# vector in config.bfd.  When syncing with config.bfd, don't forget that
# earlier case-matches trump later ones.
proc is_bad_symtab {} {
    if { ![istarget "mips*-*-*"] } {
	return 0;
    }
    if { [istarget "*-*-chorus*"]
	 || [istarget "*-*-irix5*"]
	 || [istarget "*-*-irix6*"]
	 || [istarget "*-*-none"]
	 || [istarget "*-*-rtems*"]
	 || [istarget "*-*-windiss"] } {
	return 1;
    }
    if { [istarget "*-*-elf*"]
	 && ![istarget "*-sde-*"]
	 && ![istarget "*-mti-*"]
	 && ![istarget "*-img-*"] } {
	return 1;
    }
    if { [istarget "*-*-openbsd*"]
	 && ![istarget "mips64*-*-*"] } {
	return 1;
    }
    return 0;
}

# Compare two files line-by-line.  FILE_1 is the actual output and FILE_2
# is the expected output.  Ignore blank lines in either file.
#
# FILE_2 is a series of regexps, comments and # directives.  The directives
# are:
#
#    #pass
#        Treat the test as a PASS if everything up till this point has
#        matched.  Ignore any remaining lines in either FILE_1 or FILE_2.
#
#    #failif
#        Reverse the sense of the test: expect differences to exist.
#
#    #...
#    REGEXP
#        Skip all lines in FILE_1 until the first that matches REGEXP.
#
# Other # lines are comments.  Regexp lines starting with the `!' character
# specify inverse matching (use `\!' for literal matching against a leading
# `!').  Skip empty lines in both files.
#
# The first optional argument is a list of regexp substitutions of the form:
#
#    EXP1 SUBSPEC1 EXP2 SUBSPEC2 ...
#
# This tells the function to apply each regexp substitution EXPi->SUBSPECi
# in order to every line of FILE_2.
#
# Return nonzero if differences exist.
proc regexp_diff { file_1 file_2 args } {
    set eof -1
    set end_1 0
    set end_2 0
    set differences 0
    set diff_pass 0
    set fail_if_match 0
    set ref_subst ""
    if { [llength $args] > 0 } {
	set ref_subst [lindex $args 0]
    }
    if { [llength $args] > 1 } {
	perror "Too many arguments to regexp_diff"
	return 1
    }

    if [file exists $file_1] then {
	set file_a [open $file_1 r]
    } else {
	perror "$file_1 doesn't exist"
	return 1
    }

    if [file exists $file_2] then {
	set file_b [open $file_2 r]
    } else {
	perror "$file_2 doesn't exist"
	close $file_a
	return 1
    }

    verbose " Regexp-diff'ing: $file_1 $file_2" 2

    while { 1 } {
	set line_a ""
	set line_b ""
	while { [string length $line_a] == 0 } {
	    # Ignore blank line in FILE_1.
	    if { [gets $file_a line_a] == $eof } {
		set end_1 1
		break
	    }
	}
	while { [string length $line_b] == 0 || [string match "#*" $line_b] } {
	    if { [string match "#pass" $line_b] } {
		set end_2 1
		set diff_pass 1
		break
	    } elseif { [string match "#failif" $line_b] } {
		send_log "fail if no difference\n"
		verbose "fail if no difference" 3
		set fail_if_match 1
	    } elseif { [string match "#..." $line_b] } {
		if { [gets $file_b line_b] == $eof } {
		    set end_2 1
		    set diff_pass 1
		    break
		}
		set negated [expr { [string index $line_b 0] == "!" }]
		set line_bx [string range $line_b $negated end]
		set n [expr { $negated ? "! " : "" }]
		# Substitute on the reference.
		foreach {name value} $ref_subst {
		    regsub -- $name $line_bx $value line_bx
		}
		verbose "looking for $n\"^$line_bx$\"" 3
		while { [expr [regexp "^$line_bx$" "$line_a"] == $negated] } {
		    verbose "skipping    \"$line_a\"" 3
		    if { [gets $file_a line_a] == $eof } {
			set end_1 1
			break
		    }
		}
		break
	    }
	    if { [gets $file_b line_b] == $eof } {
		set end_2 1
		break
	    }
	}

	if { $diff_pass } {
	    break
	} elseif { $end_1 && $end_2 } {
	    break
	} elseif { $end_1 } {
	    send_log "extra regexps in $file_2 starting with \"^$line_b$\"\nEOF from $file_1\n"
	    verbose "extra regexps in $file_2 starting with \"^$line_b$\"\nEOF from $file_1" 3
	    set differences 1
	    break
	} elseif { $end_2 } {
	    send_log "extra lines in $file_1 starting with \"^$line_a$\"\nEOF from $file_2\n"
	    verbose "extra lines in $file_1 starting with \"^$line_a$\"\nEOF from $file_2\n" 3
	    set differences 1
	    break
	} else {
	    set negated [expr { [string index $line_b 0] == "!" }]
	    set line_bx [string range $line_b $negated end]
	    set n [expr { $negated ? "! " : "" }]
	    set s [expr { $negated ? "  " : "" }]
	    # Substitute on the reference.
	    foreach {name value} $ref_subst {
		regsub -- $name $line_bx $value line_bx
	    }
	    verbose "regexp $n\"^$line_bx$\"\nline   \"$line_a\"" 3
	    if { [expr [regexp "^$line_bx$" "$line_a"] == $negated] } {
		send_log "regexp_diff match failure\n"
		send_log "regexp $n\"^$line_bx$\"\nline   $s\"$line_a\"\n"
		verbose "regexp_diff match failure\n" 3
		set differences 1
	    }
	}
    }

    if { $differences == 0 && !$diff_pass && [eof $file_a] != [eof $file_b] } {
	send_log "$file_1 and $file_2 are different lengths\n"
	verbose "$file_1 and $file_2 are different lengths" 3
	set differences 1
    }

    if { $fail_if_match } {
	if { $differences == 0 } {
	    set differences 1
	} else {
	    set differences 0
	}
    }

    close $file_a
    close $file_b

    return $differences
}
Commit	Line	Data
219d1afa	1	# Copyright (C) 1993-2018 Free Software Foundation, Inc.
f3097f33 RS	2	#
	3	# This file is part of the GNU Binutils.
	4	#
	5	# This file is free software; you can redistribute it and/or modify
	6	# it under the terms of the GNU General Public License as published by
	7	# the Free Software Foundation; either version 3 of the License, or
	8	# (at your option) any later version.
	9	#
	10	# This program is distributed in the hope that it will be useful,
	11	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	# GNU General Public License for more details.
	14	#
	15	# You should have received a copy of the GNU General Public License
	16	# along with this program; if not, write to the Free Software
	17	# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
	18	# MA 02110-1301, USA.
	19
	20	# True if the object format is known to be ELF.
	21	#
	22	proc is_elf_format {} {
b3066ae8 AM	23	# config.sub for these targets curiously transforms a target doublet
	24	# ending in -elf to -none. eg. m68hc12-elf to m68hc12-unknown-none
	25	# They are always elf.
	26	if { [istarget m68hc1-] \|\| [istarget xgate-*] } {
	27	return 1;
	28	}
	29
4a85cc09	30	if { ![istarget --eabi*]
f3097f33	31	&& ![istarget --elf*]
4a85cc09	32	&& ![istarget --freebsd*]
f3097f33	33	&& ![istarget --gnu*]
f3097f33 RS	34	&& ![istarget --irix5*]
f3097f33 RS	35	&& ![istarget --irix6*]
4a85cc09	36	&& ![istarget --linux*]
c43b2c54	37	&& ![istarget --lynxos*]
4a85cc09	38	&& ![istarget --nacl*]
f3097f33 RS	39	&& ![istarget --netbsd*]
f3097f33 RS	40	&& ![istarget --openbsd*]
4a85cc09 SKS	41	&& ![istarget --rtems*]
4a85cc09 SKS	42	&& ![istarget --solaris2*]
c43b2c54	43	&& ![istarget --symbianelf*]
4a85cc09 SKS	44	&& ![istarget --sysv4*]
4a85cc09 SKS	45	&& ![istarget --unixware*]
f96bd6c2	46	&& ![istarget --wasm32*]
4a85cc09 SKS	47	&& ![istarget avr--]
	48	&& ![istarget bfin-*-uclinux]
	49	&& ![istarget frv--uclinux]
	50	&& ![istarget hppa64--hpux]
	51	&& ![istarget ia64--hpux]
	52	&& ![istarget sh--uclinux*]
	53	&& ![istarget tic6x--uclinux*] } {
f3097f33 RS	54	return 0
	55	}
	56
4a85cc09	57	if { [istarget --linuxaout]
df26367c	58	\|\| [istarget --linuxecoff]
f3097f33	59	\|\| [istarget --linuxoldld]
4a85cc09	60	\|\| [istarget --rtemscoff*]
a8eb42a8	61	\|\| [istarget i?86--freebsd\[12\].] } {
f3097f33 RS	62	return 0
	63	}
	64
	65	if { ![istarget --netbsdelf*]
4a85cc09	66	&& ( [istarget --netbsdaout]
f3097f33 RS	67	\|\| [istarget --netbsdpe*]
	68	\|\| [istarget arm--netbsd*]
	69	\|\| [istarget sparc--netbsd]
	70	\|\| [istarget i86--netbsd*]
	71	\|\| [istarget m68--netbsd*]
	72	\|\| [istarget vax--netbsd]
	73	\|\| [istarget ns32k--netbsd]) } {
	74	return 0
	75	}
	76
4a85cc09	77	if { [istarget arm--openbsd]
f3097f33 RS	78	\|\| [istarget i386--openbsd\[0-2\].]
	79	\|\| [istarget i386-*-openbsd3.\[0-2\]]
	80	\|\| [istarget m68--openbsd*]
	81	\|\| [istarget ns32k--openbsd]
	82	\|\| [istarget sparc--openbsd\[0-2\].]
	83	\|\| [istarget sparc-*-openbsd3.\[0-1\]]
	84	\|\| [istarget vax--openbsd] } {
	85	return 0
	86	}
	87
	88	return 1
	89	}
	90
	91	# True if the object format is known to be a.out.
	92	#
	93	proc is_aout_format {} {
	94	if { [istarget --netbsdelf]
	95	\|\| [istarget sparc64--netbsd]
	96	\|\| [istarget sparc64--openbsd] } {
	97	return 0
	98	}
	99	if { [istarget --\[ab\]out]
	100	\|\| [istarget --linuxoldld]
	101	\|\| [istarget --bsd*]
	102	\|\| [istarget --msdos*]
	103	\|\| [istarget arm--netbsd]
	104	\|\| [istarget arm--openbsd]
	105	\|\| [istarget arm--riscix]
7e16ef34	106	\|\| [istarget i?86--freebsd\[12\].]
f3097f33 RS	107	\|\| [istarget i?86--netbsd]
	108	\|\| [istarget i?86--openbsd\[0-2\]]
	109	\|\| [istarget i?86--openbsd3.\[0-2\]]
	110	\|\| [istarget i?86-*-vsta]
	111	\|\| [istarget i?86--mach]
	112	\|\| [istarget m68--netbsd*]
	113	\|\| [istarget m68--openbsd*]
	114	\|\| [istarget ns32k--]
	115	\|\| [istarget pdp11--]
	116	\|\| [istarget sparc--sunos4*]
	117	\|\| [istarget sparc--netbsd*]
	118	\|\| [istarget sparc--openbsd\[0-2\]*]
	119	\|\| [istarget sparc--openbsd3.\[0-1\]*]
	120	\|\| [istarget sparc*-fujitsu-none]
	121	\|\| [istarget vax-dec-ultrix*]
	122	\|\| [istarget vax-*-netbsd] } {
	123	return 1
	124	}
	125	return 0
	126	}
	127
	128	# True if the object format is known to be PE COFF.
	129	#
	130	proc is_pecoff_format {} {
	131	if { ![istarget --mingw*]
	132	&& ![istarget --cygwin*]
	133	&& ![istarget --cegcc*]
	134	&& ![istarget --pe*] } {
	135	return 0
	136	}
	137
	138	return 1
	139	}
	140
	141	# True if the object format is known to be 64-bit ELF.
	142	#
	143	proc is_elf64 { binary_file } {
	144	global READELF
	145	global READELFFLAGS
	146
	147	set readelf_size ""
	148	catch "exec $READELF $READELFFLAGS -h $binary_file > readelf.out" got
	149
	150	if ![string match "" $got] then {
	151	return 0
	152	}
	153
	154	if { ![regexp "\n\[ \]Class:\[ \]ELF(\[0-9\]+)\n" \
	155	[file_contents readelf.out] nil readelf_size] } {
	156	return 0
	157	}
	158
	159	if { $readelf_size == "64" } {
	160	return 1
	161	}
	162
	163	return 0
	164	}
eb22018c	165
a43942db MR	166	# True if the ELF target supports STB_GNU_UNIQUE with the ELF header's
	167	# OSABI field set to ELFOSABI_GNU.
	168	#
	169	# This generally depends on the target OS only, however there are a
	170	# number of exceptions for bare metal targets as follows. The MSP430
	171	# and Visium targets set OSABI to ELFOSABI_STANDALONE and cannot
	172	# support STB_GNU_UNIQUE. Likewise non-EABI ARM targets set OSABI to
	173	# ELFOSABI_ARM, and TI C6X targets to ELFOSABI_C6000_*. Finally
a8eb42a8	174	# rather than `bfd_elf_final_link' AM33/2.0, D30V, DLX, and
a43942db MR	175	# picoJava targets use `_bfd_generic_final_link', which does not
	176	# support STB_GNU_UNIQUE symbol binding causing assertion failures.
	177	#
	178	proc supports_gnu_unique {} {
	179	if { [istarget --gnu*]
	180	\|\| [istarget --linux*]
	181	\|\| [istarget --nacl*] } {
	182	return 1
	183	}
	184	if { [istarget "arm--eabi"] } {
	185	return 1
	186	}
f96bd6c2 PC	187	if { [istarget "wasm32--*"] } {
	188	return 1
	189	}
a43942db MR	190	if { ![istarget "--elf*"] } {
	191	return 0
	192	}
	193	if { [istarget "arm--*"]
	194	\|\| [istarget "msp430--"]
	195	\|\| [istarget "tic6x--"]
	196	\|\| [istarget "visium--"] } {
	197	return 0
	198	}
	199	if { [istarget "am33_2.0--"]
	200	\|\| [istarget "d30v--"]
	201	\|\| [istarget "dlx--"]
a43942db MR	202	\|\| [istarget "pj--*"] } {
	203	return 0
	204	}
	205	return 1
	206	}
	207
9cc0123f AM	208	# True for targets that do not sort .symtab as per the ELF standard.
	209	# ie. any that have mips_elf32_be_vec, mips_elf32_le_vec,
	210	# mips_elf32_n_be_vec or mips_elf32_n_le_vec as the primary bfd target
	211	# vector in config.bfd. When syncing with config.bfd, don't forget that
	212	# earlier case-matches trump later ones.
	213	proc is_bad_symtab {} {
	214	if { ![istarget "mips--*"] } {
	215	return 0;
	216	}
	217	if { [istarget "--chorus*"]
	218	\|\| [istarget "--irix5*"]
	219	\|\| [istarget "--irix6*"]
	220	\|\| [istarget "--none"]
	221	\|\| [istarget "--rtems*"]
	222	\|\| [istarget "--windiss"] } {
	223	return 1;
	224	}
	225	if { [istarget "--elf*"]
	226	&& ![istarget "-sde-"]
	227	&& ![istarget "-mti-"]
	228	&& ![istarget "-img-"] } {
	229	return 1;
	230	}
	231	if { [istarget "--openbsd*"]
	232	&& ![istarget "mips64--*"] } {
	233	return 1;
	234	}
	235	return 0;
	236	}
	237
eb22018c RS	238	# Compare two files line-by-line. FILE_1 is the actual output and FILE_2
	239	# is the expected output. Ignore blank lines in either file.
	240	#
	241	# FILE_2 is a series of regexps, comments and # directives. The directives
	242	# are:
	243	#
	244	# #pass
	245	# Treat the test as a PASS if everything up till this point has
	246	# matched. Ignore any remaining lines in either FILE_1 or FILE_2.
	247	#
	248	# #failif
	249	# Reverse the sense of the test: expect differences to exist.
	250	#
	251	# #...
	252	# REGEXP
	253	# Skip all lines in FILE_1 until the first that matches REGEXP.
	254	#
738f4d98 MR	255	# Other # lines are comments. Regexp lines starting with the `!' character
	256	# specify inverse matching (use `\!' for literal matching against a leading
	257	# `!'). Skip empty lines in both files.
eb22018c RS	258	#
	259	# The first optional argument is a list of regexp substitutions of the form:
	260	#
	261	# EXP1 SUBSPEC1 EXP2 SUBSPEC2 ...
	262	#
	263	# This tells the function to apply each regexp substitution EXPi->SUBSPECi
	264	# in order to every line of FILE_2.
	265	#
	266	# Return nonzero if differences exist.
	267	proc regexp_diff { file_1 file_2 args } {
	268	set eof -1
	269	set end_1 0
	270	set end_2 0
	271	set differences 0
	272	set diff_pass 0
	273	set fail_if_match 0
	274	set ref_subst ""
	275	if { [llength $args] > 0 } {
	276	set ref_subst [lindex $args 0]
	277	}
	278	if { [llength $args] > 1 } {
	279	perror "Too many arguments to regexp_diff"
	280	return 1
	281	}
	282
	283	if [file exists $file_1] then {
	284	set file_a [open $file_1 r]
	285	} else {
	286	perror "$file_1 doesn't exist"
	287	return 1
	288	}
	289
	290	if [file exists $file_2] then {
	291	set file_b [open $file_2 r]
	292	} else {
	293	perror "$file_2 doesn't exist"
	294	close $file_a
	295	return 1
	296	}
	297
	298	verbose " Regexp-diff'ing: $file_1 $file_2" 2
	299
	300	while { 1 } {
	301	set line_a ""
	302	set line_b ""
	303	while { [string length $line_a] == 0 } {
	304	# Ignore blank line in FILE_1.
	305	if { [gets $file_a line_a] == $eof } {
	306	set end_1 1
	307	break
	308	}
	309	}
	310	while { [string length $line_b] == 0 \|\| [string match "#*" $line_b] } {
	311	if { [string match "#pass" $line_b] } {
	312	set end_2 1
	313	set diff_pass 1
	314	break
	315	} elseif { [string match "#failif" $line_b] } {
	316	send_log "fail if no difference\n"
	317	verbose "fail if no difference" 3
	318	set fail_if_match 1
	319	} elseif { [string match "#..." $line_b] } {
	320	if { [gets $file_b line_b] == $eof } {
	321	set end_2 1
322	set diff_pass 1
323	break
324	}
47a50e5b	325	set negated [expr { [string index $line_b 0] == "!" }]
738f4d98 MR	326	set line_bx [string range $line_b $negated end]
738f4d98 MR	327	set n [expr { $negated ? "! " : "" }]
eb22018c RS	328	# Substitute on the reference.
eb22018c RS	329	foreach {name value} $ref_subst {
738f4d98	330	regsub -- $name $line_bx $value line_bx
eb22018c	331	}
738f4d98 MR	332	verbose "looking for $n\"^$line_bx$\"" 3
738f4d98 MR	333	while { [expr [regexp "^$line_bx$" "$line_a"] == $negated] } {
eb22018c RS	334	verbose "skipping \"$line_a\"" 3
	335	if { [gets $file_a line_a] == $eof } {
	336	set end_1 1
	337	break
	338	}
	339	}
	340	break
	341	}
	342	if { [gets $file_b line_b] == $eof } {
	343	set end_2 1
	344	break
	345	}
	346	}
	347
	348	if { $diff_pass } {
	349	break
	350	} elseif { $end_1 && $end_2 } {
	351	break
	352	} elseif { $end_1 } {
	353	send_log "extra regexps in $file_2 starting with \"^$line_b$\"\nEOF from $file_1\n"
	354	verbose "extra regexps in $file_2 starting with \"^$line_b$\"\nEOF from $file_1" 3
	355	set differences 1
	356	break
	357	} elseif { $end_2 } {
	358	send_log "extra lines in $file_1 starting with \"^$line_a$\"\nEOF from $file_2\n"
	359	verbose "extra lines in $file_1 starting with \"^$line_a$\"\nEOF from $file_2\n" 3
	360	set differences 1
	361	break
	362	} else {
47a50e5b	363	set negated [expr { [string index $line_b 0] == "!" }]
738f4d98 MR	364	set line_bx [string range $line_b $negated end]
	365	set n [expr { $negated ? "! " : "" }]
	366	set s [expr { $negated ? " " : "" }]
eb22018c RS	367	# Substitute on the reference.
eb22018c RS	368	foreach {name value} $ref_subst {
738f4d98	369	regsub -- $name $line_bx $value line_bx
eb22018c	370	}
738f4d98 MR	371	verbose "regexp $n\"^$line_bx$\"\nline \"$line_a\"" 3
738f4d98 MR	372	if { [expr [regexp "^$line_bx$" "$line_a"] == $negated] } {
eb22018c	373	send_log "regexp_diff match failure\n"
738f4d98	374	send_log "regexp $n\"^$line_bx$\"\nline $s\"$line_a\"\n"
eb22018c RS	375	verbose "regexp_diff match failure\n" 3
	376	set differences 1
	377	}
	378	}
	379	}
	380
	381	if { $differences == 0 && !$diff_pass && [eof $file_a] != [eof $file_b] } {
	382	send_log "$file_1 and $file_2 are different lengths\n"
	383	verbose "$file_1 and $file_2 are different lengths" 3
	384	set differences 1
	385	}
	386
	387	if { $fail_if_match } {
	388	if { $differences == 0 } {
	389	set differences 1
	390	} else {
	391	set differences 0
	392	}
	393	}
	394
	395	close $file_a
	396	close $file_b
	397
	398	return $differences
	399	}