Add PostScript lexer (#486).

5 files changed, 612 insertions, 2 deletions

diff --git a/AUTHORS b/AUTHORS
index 6692f40d..14446b95 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -25,6 +25,7 @@ Other contributors, listed alphabetically, are:
 * Owen Durni -- haXe lexer
 * Nick Efford -- Python 3 lexer
 * Artem Egorkine -- terminal256 formatter
+* James H. Fisher -- PostScript lexer
 * Laurent Gautier -- R/S lexer
 * Krzysiek Goj -- Scala lexer
 * Matt Good -- Genshi, Cheetah lexers
diff --git a/CHANGES b/CHANGES
index 3b85eba7..62a91091 100644
--- a/CHANGES
+++ b/CHANGES
@@ -10,9 +10,10 @@ Version 1.4
 - Lexers added:
 
   * Factor (#520)
+  * PostScript (#486)
+  * Verilog (#491)
   * BlitzMax Basic (#478)
   * Ioke (#465)
-  * Verilog (#491)
   * Java properties, split out of the INI lexer (#445)
 
 - Performance improvements in the HTML formatter (#523).
diff --git a/pygments/lexers/_mapping.py b/pygments/lexers/_mapping.py
index ef1a942e..667c47d8 100644
--- a/pygments/lexers/_mapping.py
+++ b/pygments/lexers/_mapping.py
@@ -146,6 +146,7 @@ LEXERS = {
     'OocLexer': ('pygments.lexers.compiled', 'Ooc', ('ooc',), ('*.ooc',), ('text/x-ooc',)),
     'PerlLexer': ('pygments.lexers.agile', 'Perl', ('perl', 'pl'), ('*.pl', '*.pm'), ('text/x-perl', 'application/x-perl')),
     'PhpLexer': ('pygments.lexers.web', 'PHP', ('php', 'php3', 'php4', 'php5'), ('*.php', '*.php[345]'), ('text/x-php',)),
+    'PostScriptLexer': ('pygments.lexers.other', 'PostScript', ('postscript',), ('*.ps', '*.eps'), ('application/postscript',)),
     'PovrayLexer': ('pygments.lexers.other', 'POVRay', ('pov',), ('*.pov', '*.inc'), ('text/x-povray',)),
     'PrologLexer': ('pygments.lexers.compiled', 'Prolog', ('prolog',), ('*.prolog', '*.pro', '*.pl'), ('text/x-prolog',)),
     'PropertiesLexer': ('pygments.lexers.text', 'Properties', ('properties',), ('*.properties',), ('text/x-java-properties',)),
diff --git a/pygments/lexers/other.py b/pygments/lexers/other.py
index 98014254..286dc68a 100644
--- a/pygments/lexers/other.py
+++ b/pygments/lexers/other.py
@@ -24,7 +24,7 @@ __all__ = ['SqlLexer', 'MySqlLexer', 'SqliteConsoleLexer', 'BrainfuckLexer',
            'MOOCodeLexer', 'SmalltalkLexer', 'TcshLexer', 'LogtalkLexer',
            'GnuplotLexer', 'PovrayLexer', 'AppleScriptLexer',
            'BashSessionLexer', 'ModelicaLexer', 'RebolLexer', 'ABAPLexer',
-           'NewspeakLexer', 'GherkinLexer', 'AsymptoteLexer']
+           'NewspeakLexer', 'GherkinLexer', 'AsymptoteLexer', 'PostScriptLexer']
 
 line_re  = re.compile('.*?\n')
 
@@ -2312,3 +2312,95 @@ class AsymptoteLexer(RegexLexer):
            elif token is Name and value in ASYVARNAME:
                token = Name.Variable
            yield index, token, value
+
+
+class PostScriptLexer(RegexLexer):
+    """
+    Lexer for PostScript files.
+
+    The PostScript Language Reference published by Adobe at
+    <http://partners.adobe.com/public/developer/en/ps/PLRM.pdf>
+    is the authority for this.
+
+    *New in Pygments 1.4.*
+    """
+    name = 'PostScript'
+    aliases = ['postscript']
+    filenames = ['*.ps', '*.eps']
+    mimetypes = ['application/postscript']
+
+    delimiter = r'\(\)\<\>\[\]\{\}\/\%\s'
+    delimiter_end = r'(?=[%s])' % delimiter
+
+    valid_name_chars = r'[^%s]' % delimiter
+    valid_name = r"%s+%s" % (valid_name_chars, delimiter_end)
+
+    tokens = {
+        'root': [
+            # All comment types
+            (r'^%!.+\n', Comment.Preproc),
+            (r'%%.*\n', Comment.Special),
+            (r'(^%.*\n){2,}', Comment.Multiline),
+            (r'%.*\n', Comment.Single),
+
+            # String literals are awkward; enter separate state.
+            (r'\(', String, 'stringliteral'),
+
+            (r'[\{\}(\<\<)(\>\>)\[\]]', Punctuation),
+
+            # Numbers
+            (r'<[0-9A-Fa-f]+>' + delimiter_end, Number.Hex),
+            # Slight abuse: use Oct to signify any explicit base system
+            (r'[0-9]+\#(\-|\+)?([0-9]+\.?|[0-9]*\.[0-9]+|[0-9]+\.[0-9]*)'
+             r'((e|E)[0-9]+)?' + delimiter_end, Number.Oct),
+            (r'(\-|\+)?([0-9]+\.?|[0-9]*\.[0-9]+|[0-9]+\.[0-9]*)((e|E)[0-9]+)?'
+             + delimiter_end, Number.Float),
+            (r'(\-|\+)?[0-9]+' + delimiter_end, Number.Integer),
+
+            # References
+            (r'\/%s' % valid_name, Name.Variable),
+
+            # Names
+            (valid_name, Name.Function),      # Anything else is executed
+
+            # These keywords taken from
+            # <http://www.math.ubc.ca/~cass/graphics/manual/pdf/a1.pdf>
+            # Is there an authoritative list anywhere that doesn't involve
+            # trawling documentation?
+
+            (r'(false|true)' + delimiter_end, Keyword.Constant),
+
+            # Conditionals / flow control
+            (r'(eq|ne|ge|gt|le|lt|and|or|not|if|ifelse|for|forall)'
+             + delimiter_end, Keyword.Reserved),
+
+            ('(abs|add|aload|arc|arcn|array|atan|begin|bind|ceiling|charpath|'
+             'clip|closepath|concat|concatmatrix|copy|cos|currentlinewidth|'
+             'currentmatrix|currentpoint|curveto|cvi|cvs|def|defaultmatrix|'
+             'dict|dictstackoverflow|div|dtransform|dup|end|exch|exec|exit|exp|'
+             'fill|findfont|floor|get|getinterval|grestore|gsave|gt|'
+             'identmatrix|idiv|idtransform|index|invertmatrix|itransform|'
+             'length|lineto|ln|load|log|loop|matrix|mod|moveto|mul|neg|newpath|'
+             'pathforall|pathbbox||pop|print|pstack|put|quit|rand|rangecheck|'
+             'rcurveto|repeat|restore|rlineto|rmoveto|roll|rotate|round|run|'
+             'save|scale|scalefont|setdash|setfont|setgray|setlinecap|'
+             'setlinejoin|setlinewidth|setmatrix|setrgbcolor|shfill|show|'
+             'showpage|sin|sqrt|stack|stringwidth|stroke|strokepath|sub|'
+             'syntaxerror|transform|translate|truncate|typecheck|undefined|'
+             'undefinedfilename|undefinedresult)' + delimiter_end,
+             Name.Builtin),
+
+            (r'\s+', Text),
+        ],
+
+        'stringliteral': [
+            (r'[^\(\)\\]+', String),
+            (r'\\', String.Escape, 'escape'),
+            (r'\(', String, '#push'),
+            (r'\)', String, '#pop'),
+        ],
+
+        'escape': [
+            (r'([0-8]{3}|n|r|t|b|f|\\|\(|\)|)', String.Escape, '#pop'),
+        ],
+    }
diff --git a/tests/examplefiles/cells.ps b/tests/examplefiles/cells.ps
new file mode 100644
index 00000000..d5bc325f
--- /dev/null
+++ b/tests/examplefiles/cells.ps
@@ -0,0 +1,515 @@
+%!PS-Adobe-2.0
+%%Creator: PS_Write.F
+%%Title: cells.ps
+%%Pages: 1
+%%Document-Fonts: Times-Roman
+%%CreationDate: 09/29/99 
+%%BoundingBox:   36   36  576  756
+%%EndComments
+%%BeginProlog
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