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+# Commands covered:  scan
+#
+# This file contains a collection of tests for one or more of the Tcl
+# built-in commands.  Sourcing this file into Tcl runs the tests and
+# generates output for errors.  No output means no errors were found.
+#
+# Copyright (c) 1991-1994 The Regents of the University of California.
+# Copyright (c) 1994-1997 Sun Microsystems, Inc.
+#
+# See the file "license.terms" for information on usage and redistribution
+# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+#
+# SCCS: @(#) scan.test 1.26 97/08/06 08:56:08
+
+if {[string compare test [info procs test]] == 1} then {source defs}
+
+test scan-1.1 {integer scanning} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "-20 1476 \n33 0" "%d %d %d %d" a b c d] $a $b $c $d
+} {4 -20 1476 33 0}
+test scan-1.2 {integer scanning} {
+    set a {}; set b {}; set c {}
+    list [scan "-45 16 7890 +10" "%2d %*d %10d %d" a b c] $a $b $c
+} {3 -4 16 7890}
+test scan-1.3 {integer scanning} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "-45 16 +10 987" "%ld %d %ld %d" a b c d] $a $b $c $d
+} {4 -45 16 10 987}
+test scan-1.4 {integer scanning} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "14 1ab 62 10" "%d %x %lo %x" a b c d] $a $b $c $d
+} {4 14 427 50 16}
+test scan-1.5 {integer scanning} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "12345670 1234567890ab cdefg" "%o	 %o %x %lx" a b c d] \
+	    $a $b $c $d
+} {4 2739128 342391 561323 52719}
+test scan-1.6 {integer scanning} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "ab123-24642" "%2x %3x %3o %2o" a b c d] $a $b $c $d
+} {4 171 291 -20 52}
+test scan-1.7 {integer scanning} {
+    set a {}; set b {}
+    list [scan "1234567 234 567  " "%*3x %x %*o %4o" a b] $a $b
+} {2 17767 375}
+test scan-1.8 {integer scanning} {
+    set a {}; set b {}
+    list [scan "a	1234" "%d %d" a b] $a $b
+} {0 {} {}}
+test scan-1.9 {integer scanning} {
+    set a {}; set b {}; set c {}; set d {};
+    list [scan "12345678" "%2d %2d %2ld %2d" a b c d] $a $b $c $d
+} {4 12 34 56 78}
+test scan-1.10 {integer scanning} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "1 2 " "%hd %d %d %d" a b c d] $a $b $c $d
+} {2 1 2 {} {}}
+#
+# The behavior for scaning intergers larger than MAX_INT is
+# not defined by the ANSI spec.  Some implementations wrap the
+# input (-16) some return MAX_INT.
+#
+test scan-1.11 {integer scanning} {nonPortable} {
+    set a {}; set b {};
+    list [scan "4294967280 4294967280" "%u %d" a b] $a $b
+} {2 4294967280 -16}
+
+test scan-2.1 {floating-point scanning} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "2.1 -3.0e8 .99962 a" "%f%g%e%f" a b c d] $a $b $c $d
+} {3 2.1 -300000000.0 0.99962 {}}
+test scan-2.2 {floating-point scanning} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "-1.2345 +8.2 9" "%3e %3lf %f %f" a b c d] $a $b $c $d
+} {4 -1.0 234.0 5.0 8.2}
+test scan-2.3 {floating-point scanning} {
+    set a {}; set b {}; set c {}
+    list [scan "1e00004 332E-4 3e+4" "%Lf %*2e %f %f" a b c] $a $c
+} {3 10000.0 30000.0}
+#
+# Some libc implementations consider 3.e- bad input.  The ANSI
+# spec states that digits must follow the - sign.
+#
+test scan-2.4 {floating-point scanning} {nonPortable} {
+    set a {}; set b {}; set c {}
+    list [scan "1. 47.6 2.e2 3.e-" "%f %*f %f %f" a b c] $a $b $c
+} {3 1.0 200.0 3.0}
+test scan-2.5 {floating-point scanning} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "4.6 99999.7 876.43e-1 118" "%f %f %f %e" a b c d] $a $b $c $d
+} {4 4.6 99999.7 87.643 118.0}
+test scan-2.6 {floating-point scanning} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "1.2345 697.0e-3 124 .00005" "%f %e %f %e" a b c d] $a $b $c $d
+} {4 1.2345 0.697 124.0 5e-05}
+test scan-2.7 {floating-point scanning} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "4.6abc" "%f %f %f %f" a b c d] $a $b $c $d
+} {1 4.6 {} {} {}}
+test scan-2.8 {floating-point scanning} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "4.6 5.2" "%f %f %f %f" a b c d] $a $b $c $d
+} {2 4.6 5.2 {} {}}
+
+test scan-3.1 {string and character scanning} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "abc defghijk dum " "%s %3s %20s %s" a b c d] $a $b $c $d
+} {4 abc def ghijk dum}
+test scan-3.2 {string and character scanning} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "a       bcdef" "%c%c%1s %s" a b c d] $a $b $c $d
+} {4 97 32 b cdef}
+test scan-3.3 {string and character scanning} {
+    set a {}; set b {}; set c {}
+    list [scan "123456 test " "%*c%*s %s %s %s" a b c] $a $b $c
+} {1 test {} {}}
+test scan-3.4 {string and character scanning} {
+    set a {}; set b {}; set c {}; set d
+    list [scan "ababcd01234  f 123450" {%4[abcd] %4[abcd] %[^abcdef] %[^0]} a b c d] $a $b $c $d
+} {4 abab cd {01234  } {f 12345}}
+test scan-3.5 {string and character scanning} {
+    set a {}; set b {}; set c {}
+    list [scan "aaaaaabc aaabcdefg  + +  XYZQR" {%*4[a] %s %*4[a]%s%*4[ +]%c} a b c] $a $b $c
+} {3 aabc bcdefg 43}
+
+test scan-4.1 {error conditions} {
+    catch {scan a}
+} 1
+test scan-4.2 {error conditions} {
+    catch {scan a} msg
+    set msg
+} {wrong # args: should be "scan string format ?varName varName ...?"}
+test scan-4.3 {error conditions} {
+    catch {scan "1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21" "%d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d" a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 a12 a13 a14 a15 a16 a17 a18 a19 a20 a21}
+} 1
+test scan-4.4 {error conditions} {
+    catch {scan "1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21" "%d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d" a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 a12 a13 a14 a15 a16 a17 a18 a19 a20 a21} msg
+    set msg
+} {too many fields to scan}
+test scan-4.5 {error conditions} {
+    list [catch {scan a %D} msg] $msg
+} {1 {bad scan conversion character "D"}}
+test scan-4.6 {error conditions} {
+    list [catch {scan a %O} msg] $msg
+} {1 {bad scan conversion character "O"}}
+test scan-4.7 {error conditions} {
+    list [catch {scan a %X} msg] $msg
+} {1 {bad scan conversion character "X"}}
+test scan-4.8 {error conditions} {
+    list [catch {scan a %F} msg] $msg
+} {1 {bad scan conversion character "F"}}
+test scan-4.9 {error conditions} {
+    list [catch {scan a %E} msg] $msg
+} {1 {bad scan conversion character "E"}}
+test scan-4.10 {error conditions} {
+    list [catch {scan a "%d %d" a} msg] $msg
+} {1 {different numbers of variable names and field specifiers}}
+test scan-4.11 {error conditions} {
+    list [catch {scan a "%d %d" a b c} msg] $msg
+} {1 {different numbers of variable names and field specifiers}}
+test scan-4.12 {error conditions} {
+    set a {}; set b {}; set c {}; set d {}
+    list [expr {[scan "  a" " a %d %d %d %d" a b c d] <= 0}] $a $b $c $d
+} {1 {} {} {} {}}
+test scan-4.13 {error conditions} {
+    set a {}; set b {}; set c {}; set d {}
+    list [scan "1 2" "%d %d %d %d" a b c d] $a $b $c $d
+} {2 1 2 {} {}}
+test scan-4.14 {error conditions} {
+    catch {unset a}
+    set a(0) 44
+    list [catch {scan 44 %d a} msg] $msg
+} {1 {couldn't set variable "a"}}
+test scan-4.15 {error conditions} {
+    catch {unset a}
+    set a(0) 44
+    list [catch {scan 44 %c a} msg] $msg
+} {1 {couldn't set variable "a"}}
+test scan-4.16 {error conditions} {
+    catch {unset a}
+    set a(0) 44
+    list [catch {scan 44 %s a} msg] $msg
+} {1 {couldn't set variable "a"}}
+test scan-4.17 {error conditions} {
+    catch {unset a}
+    set a(0) 44
+    list [catch {scan 44 %f a} msg] $msg
+} {1 {couldn't set variable "a"}}
+test scan-4.18 {error conditions} {
+    catch {unset a}
+    set a(0) 44
+    list [catch {scan 44 %f a} msg] $msg
+} {1 {couldn't set variable "a"}}
+catch {unset a}
+test scan-4.19 {error conditions} {
+    list [catch {scan 44 %2c a} msg] $msg
+} {1 {field width may not be specified in %c conversion}}
+test scan-4.20 {error conditions} {
+    list [catch {scan abc {%[}} msg] $msg
+} {1 {unmatched [ in format string}}
+
+test scan-5.1 {lots of arguments} {
+    scan "10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200" "%d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d" a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 a12 a13 a14 a15 a16 a17 a18 a19 a20
+} 20
+test scan-5.2 {lots of arguments} {
+    scan "10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200" "%d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d" a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 a12 a13 a14 a15 a16 a17 a18 a19 a20
+    set a20
+} 200
+
+test scan-6.1 {miscellaneous tests} {
+    set a {}
+    list [scan ab16c ab%dc a] $a
+} {1 16}
+test scan-6.2 {miscellaneous tests} {
+    set a {}
+    list [scan ax16c ab%dc a] $a
+} {0 {}}
+test scan-6.3 {miscellaneous tests} {
+    set a {}
+    list [catch {scan ab%c114 ab%%c%d a} msg] $msg $a
+} {0 1 114}
+test scan-6.4 {miscellaneous tests} {
+    set a {}
+    list [catch {scan ab%c14 ab%%c%d a} msg] $msg $a
+} {0 1 14}
+
+test scan-7.1 {alignment in results array (TCL_ALIGN)} {
+    scan "123 13.6" "%s %f" a b
+    set b
+} 13.6
+test scan-7.2 {alignment in results array (TCL_ALIGN)} {
+    scan "1234567 13.6" "%s %f" a b
+    set b
+} 13.6
+test scan-7.3 {alignment in results array (TCL_ALIGN)} {
+    scan "12345678901 13.6" "%s %f" a b
+    set b
+} 13.6
+test scan-7.4 {alignment in results array (TCL_ALIGN)} {
+    scan "123456789012345 13.6" "%s %f" a b
+    set b
+} 13.6
+test scan-7.5 {alignment in results array (TCL_ALIGN)} {
+    scan "1234567890123456789 13.6" "%s %f" a b
+    set b
+} 13.6