# -*- coding: utf-8 -*-
"""
    pygments.lexers.matlab
    ~~~~~~~~~~~~~~~~~~~~~~

    Lexers for Matlab and related languages.

    :copyright: Copyright 2006-2015 by the Pygments team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

import re

from pygments.lexer import Lexer, RegexLexer, bygroups, words, do_insertions
from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
    Number, Punctuation, Generic, Whitespace

from pygments.lexers import _scilab_builtins

__all__ = ['MatlabLexer', 'MatlabSessionLexer', 'OctaveLexer', 'ScilabLexer']


class MatlabLexer(RegexLexer):
    """
    For Matlab source code.

    .. versionadded:: 0.10
    """
    name = 'Matlab'
    aliases = ['matlab']
    filenames = ['*.m']
    mimetypes = ['text/matlab']

    #
    # These lists are generated automatically.
    # Run the following in bash shell:
    #
    # for f in elfun specfun elmat; do
    #   echo -n "$f = "
    #   matlab -nojvm -r "help $f;exit;" | perl -ne \
    #   'push(@c,$1) if /^    (\w+)\s+-/; END {print q{["}.join(q{","},@c).qq{"]\n};}'
    # done
    #
    # elfun: Elementary math functions
    # specfun: Special Math functions
    # elmat: Elementary matrices and matrix manipulation
    #
    # taken from Matlab version 7.4.0.336 (R2007a)
    #
    elfun = ("sin", "sind", "sinh", "asin", "asind", "asinh", "cos", "cosd", "cosh",
             "acos", "acosd", "acosh", "tan", "tand", "tanh", "atan", "atand", "atan2",
             "atanh", "sec", "secd", "sech", "asec", "asecd", "asech", "csc", "cscd",
             "csch", "acsc", "acscd", "acsch", "cot", "cotd", "coth", "acot", "acotd",
             "acoth", "hypot", "exp", "expm1", "log", "log1p", "log10", "log2", "pow2",
             "realpow", "reallog", "realsqrt", "sqrt", "nthroot", "nextpow2", "abs",
             "angle", "complex", "conj", "imag", "real", "unwrap", "isreal", "cplxpair",
             "fix", "floor", "ceil", "round", "mod", "rem", "sign")
    specfun = ("airy", "besselj", "bessely", "besselh", "besseli", "besselk", "beta",
               "betainc", "betaln", "ellipj", "ellipke", "erf", "erfc", "erfcx",
               "erfinv", "expint", "gamma", "gammainc", "gammaln", "psi", "legendre",
               "cross", "dot", "factor", "isprime", "primes", "gcd", "lcm", "rat",
               "rats", "perms", "nchoosek", "factorial", "cart2sph", "cart2pol",
               "pol2cart", "sph2cart", "hsv2rgb", "rgb2hsv")
    elmat = ("zeros", "ones", "eye", "repmat", "rand", "randn", "linspace", "logspace",
             "freqspace", "meshgrid", "accumarray", "size", "length", "ndims", "numel",
             "disp", "isempty", "isequal", "isequalwithequalnans", "cat", "reshape",
             "diag", "blkdiag", "tril", "triu", "fliplr", "flipud", "flipdim", "rot90",
             "find", "end", "sub2ind", "ind2sub", "bsxfun", "ndgrid", "permute",
             "ipermute", "shiftdim", "circshift", "squeeze", "isscalar", "isvector",
             "ans", "eps", "realmax", "realmin", "pi", "i", "inf", "nan", "isnan",
             "isinf", "isfinite", "j", "why", "compan", "gallery", "hadamard", "hankel",
             "hilb", "invhilb", "magic", "pascal", "rosser", "toeplitz", "vander",
             "wilkinson")

    tokens = {
        'root': [
            # line starting with '!' is sent as a system command.  not sure what
            # label to use...
            (r'^!.*', String.Other),
            (r'%\{\s*\n', Comment.Multiline, 'blockcomment'),
            (r'%.*$', Comment),
            (r'^\s*function', Keyword, 'deffunc'),

            # from 'iskeyword' on version 7.11 (R2010):
            (words((
                'break', 'case', 'catch', 'classdef', 'continue', 'else', 'elseif',
                'end', 'enumerated', 'events', 'for', 'function', 'global', 'if',
                'methods', 'otherwise', 'parfor', 'persistent', 'properties',
                'return', 'spmd', 'switch', 'try', 'while'), suffix=r'\b'),
             Keyword),

            ("(" + "|".join(elfun + specfun + elmat) + r')\b',  Name.Builtin),

            # line continuation with following comment:
            (r'\.\.\..*$', Comment),

            # operators:
            (r'-|==|~=|<|>|<=|>=|&&|&|~|\|\|?', Operator),
            # operators requiring escape for re:
            (r'\.\*|\*|\+|\.\^|\.\\|\.\/|\/|\\', Operator),

            # punctuation:
            (r'\[|\]|\(|\)|\{|\}|:|@|\.|,', Punctuation),
            (r'=|:|;', Punctuation),

            # quote can be transpose, instead of string:
            # (not great, but handles common cases...)
            (r'(?<=[\w)\].])\'+', Operator),

            (r'(\d+\.\d*|\d*\.\d+)([eEf][+-]?[0-9]+)?', Number.Float),
            (r'\d+[eEf][+-]?[0-9]+', Number.Float),
            (r'\d+', Number.Integer),

            (r'(?<![\w)\].])\'', String, 'string'),
            (r'[a-zA-Z_]\w*', Name),
            (r'.', Text),
        ],
        'string': [
            (r'[^\']*\'', String, '#pop')
        ],
        'blockcomment': [
            (r'^\s*%\}', Comment.Multiline, '#pop'),
            (r'^.*\n', Comment.Multiline),
            (r'.', Comment.Multiline),
        ],
        'deffunc': [
            (r'(\s*)(?:(.+)(\s*)(=)(\s*))?(.+)(\()(.*)(\))(\s*)',
             bygroups(Whitespace, Text, Whitespace, Punctuation,
                      Whitespace, Name.Function, Punctuation, Text,
                      Punctuation, Whitespace), '#pop'),
            # function with no args
            (r'(\s*)([a-zA-Z_]\w*)', bygroups(Text, Name.Function), '#pop'),
        ],
    }

    def analyse_text(text):
        if re.match('^\s*%', text, re.M):  # comment
            return 0.2
        elif re.match('^!\w+', text, re.M):  # system cmd
            return 0.2


line_re  = re.compile('.*?\n')


class MatlabSessionLexer(Lexer):
    """
    For Matlab sessions.  Modeled after PythonConsoleLexer.
    Contributed by Ken Schutte <kschutte@csail.mit.edu>.

    .. versionadded:: 0.10
    """
    name = 'Matlab session'
    aliases = ['matlabsession']

    def get_tokens_unprocessed(self, text):
        mlexer = MatlabLexer(**self.options)

        curcode = ''
        insertions = []

        for match in line_re.finditer(text):
            line = match.group()

            if line.startswith('>> '):
                insertions.append((len(curcode),
                                   [(0, Generic.Prompt, line[:3])]))
                curcode += line[3:]

            elif line.startswith('>>'):
                insertions.append((len(curcode),
                                   [(0, Generic.Prompt, line[:2])]))
                curcode += line[2:]

            elif line.startswith('???'):

                idx = len(curcode)

                # without is showing error on same line as before...?
                # line = "\n" + line
                token = (0, Generic.Traceback, line)
                insertions.append((idx, [token]))

            else:
                if curcode:
                    for item in do_insertions(
                            insertions, mlexer.get_tokens_unprocessed(curcode)):
                        yield item
                    curcode = ''
                    insertions = []

                yield match.start(), Generic.Output, line

        if curcode:  # or item:
            for item in do_insertions(
                    insertions, mlexer.get_tokens_unprocessed(curcode)):
                yield item


class OctaveLexer(RegexLexer):
    """
    For GNU Octave source code.

    .. versionadded:: 1.5
    """
    name = 'Octave'
    aliases = ['octave']
    filenames = ['*.m']
    mimetypes = ['text/octave']

    # These lists are generated automatically.
    # Run the following in bash shell:
    #
    # First dump all of the Octave manual into a plain text file:
    #
    #   $ info octave --subnodes -o octave-manual
    #
    # Now grep through it:

    # for i in \
    #     "Built-in Function" "Command" "Function File" \
    #     "Loadable Function" "Mapping Function";
    # do
    #     perl -e '@name = qw('"$i"');
    #              print lc($name[0]),"_kw = [\n"';
    #
    #     perl -n -e 'print "\"$1\",\n" if /-- '"$i"': .* (\w*) \(/;' \
    #         octave-manual | sort | uniq ;
    #     echo "]" ;
    #     echo;
    # done

    # taken from Octave Mercurial changeset 8cc154f45e37 (30-jan-2011)

    builtin_kw = (
        "addlistener", "addpath", "addproperty", "all",
        "and", "any", "argnames", "argv", "assignin",
        "atexit", "autoload",
        "available_graphics_toolkits", "beep_on_error",
        "bitand", "bitmax", "bitor", "bitshift", "bitxor",
        "cat", "cell", "cellstr", "char", "class", "clc",
        "columns", "command_line_path",
        "completion_append_char", "completion_matches",
        "complex", "confirm_recursive_rmdir", "cputime",
        "crash_dumps_octave_core", "ctranspose", "cumprod",
        "cumsum", "debug_on_error", "debug_on_interrupt",
        "debug_on_warning", "default_save_options",
        "dellistener", "diag", "diff", "disp",
        "doc_cache_file", "do_string_escapes", "double",
        "drawnow", "e", "echo_executing_commands", "eps",
        "eq", "errno", "errno_list", "error", "eval",
        "evalin", "exec", "exist", "exit", "eye", "false",
        "fclear", "fclose", "fcntl", "fdisp", "feof",
        "ferror", "feval", "fflush", "fgetl", "fgets",
        "fieldnames", "file_in_loadpath", "file_in_path",
        "filemarker", "filesep", "find_dir_in_path",
        "fixed_point_format", "fnmatch", "fopen", "fork",
        "formula", "fprintf", "fputs", "fread", "freport",
        "frewind", "fscanf", "fseek", "fskipl", "ftell",
        "functions", "fwrite", "ge", "genpath", "get",
        "getegid", "getenv", "geteuid", "getgid",
        "getpgrp", "getpid", "getppid", "getuid", "glob",
        "gt", "gui_mode", "history_control",
        "history_file", "history_size",
        "history_timestamp_format_string", "home",
        "horzcat", "hypot", "ifelse",
        "ignore_function_time_stamp", "inferiorto",
        "info_file", "info_program", "inline", "input",
        "intmax", "intmin", "ipermute",
        "is_absolute_filename", "isargout", "isbool",
        "iscell", "iscellstr", "ischar", "iscomplex",
        "isempty", "isfield", "isfloat", "isglobal",
        "ishandle", "isieee", "isindex", "isinteger",
        "islogical", "ismatrix", "ismethod", "isnull",
        "isnumeric", "isobject", "isreal",
        "is_rooted_relative_filename", "issorted",
        "isstruct", "isvarname", "kbhit", "keyboard",
        "kill", "lasterr", "lasterror", "lastwarn",
        "ldivide", "le", "length", "link", "linspace",
        "logical", "lstat", "lt", "make_absolute_filename",
        "makeinfo_program", "max_recursion_depth", "merge",
        "methods", "mfilename", "minus", "mislocked",
        "mkdir", "mkfifo", "mkstemp", "mldivide", "mlock",
        "mouse_wheel_zoom", "mpower", "mrdivide", "mtimes",
        "munlock", "nargin", "nargout",
        "native_float_format", "ndims", "ne", "nfields",
        "nnz", "norm", "not", "numel", "nzmax",
        "octave_config_info", "octave_core_file_limit",
        "octave_core_file_name",
        "octave_core_file_options", "ones", "or",
        "output_max_field_width", "output_precision",
        "page_output_immediately", "page_screen_output",
        "path", "pathsep", "pause", "pclose", "permute",
        "pi", "pipe", "plus", "popen", "power",
        "print_empty_dimensions", "printf",
        "print_struct_array_contents", "prod",
        "program_invocation_name", "program_name",
        "putenv", "puts", "pwd", "quit", "rats", "rdivide",
        "readdir", "readlink", "read_readline_init_file",
        "realmax", "realmin", "rehash", "rename",
        "repelems", "re_read_readline_init_file", "reset",
        "reshape", "resize", "restoredefaultpath",
        "rethrow", "rmdir", "rmfield", "rmpath", "rows",
        "save_header_format_string", "save_precision",
        "saving_history", "scanf", "set", "setenv",
        "shell_cmd", "sighup_dumps_octave_core",
        "sigterm_dumps_octave_core", "silent_functions",
        "single", "size", "size_equal", "sizemax",
        "sizeof", "sleep", "source", "sparse_auto_mutate",
        "split_long_rows", "sprintf", "squeeze", "sscanf",
        "stat", "stderr", "stdin", "stdout", "strcmp",
        "strcmpi", "string_fill_char", "strncmp",
        "strncmpi", "struct", "struct_levels_to_print",
        "strvcat", "subsasgn", "subsref", "sum", "sumsq",
        "superiorto", "suppress_verbose_help_message",
        "symlink", "system", "tic", "tilde_expand",
        "times", "tmpfile", "tmpnam", "toc", "toupper",
        "transpose", "true", "typeinfo", "umask", "uminus",
        "uname", "undo_string_escapes", "unlink", "uplus",
        "upper", "usage", "usleep", "vec", "vectorize",
        "vertcat", "waitpid", "warning", "warranty",
        "whos_line_format", "yes_or_no", "zeros",
        "inf", "Inf", "nan", "NaN")

    command_kw = ("close", "load", "who", "whos")

    function_kw = (
        "accumarray", "accumdim", "acosd", "acotd",
        "acscd", "addtodate", "allchild", "ancestor",
        "anova", "arch_fit", "arch_rnd", "arch_test",
        "area", "arma_rnd", "arrayfun", "ascii", "asctime",
        "asecd", "asind", "assert", "atand",
        "autoreg_matrix", "autumn", "axes", "axis", "bar",
        "barh", "bartlett", "bartlett_test", "beep",
        "betacdf", "betainv", "betapdf", "betarnd",
        "bicgstab", "bicubic", "binary", "binocdf",
        "binoinv", "binopdf", "binornd", "bitcmp",
        "bitget", "bitset", "blackman", "blanks",
        "blkdiag", "bone", "box", "brighten", "calendar",
        "cast", "cauchy_cdf", "cauchy_inv", "cauchy_pdf",
        "cauchy_rnd", "caxis", "celldisp", "center", "cgs",
        "chisquare_test_homogeneity",
        "chisquare_test_independence", "circshift", "cla",
        "clabel", "clf", "clock", "cloglog", "closereq",
        "colon", "colorbar", "colormap", "colperm",
        "comet", "common_size", "commutation_matrix",
        "compan", "compare_versions", "compass",
        "computer", "cond", "condest", "contour",
        "contourc", "contourf", "contrast", "conv",
        "convhull", "cool", "copper", "copyfile", "cor",
        "corrcoef", "cor_test", "cosd", "cotd", "cov",
        "cplxpair", "cross", "cscd", "cstrcat", "csvread",
        "csvwrite", "ctime", "cumtrapz", "curl", "cut",
        "cylinder", "date", "datenum", "datestr",
        "datetick", "datevec", "dblquad", "deal",
        "deblank", "deconv", "delaunay", "delaunayn",
        "delete", "demo", "detrend", "diffpara", "diffuse",
        "dir", "discrete_cdf", "discrete_inv",
        "discrete_pdf", "discrete_rnd", "display",
        "divergence", "dlmwrite", "dos", "dsearch",
        "dsearchn", "duplication_matrix", "durbinlevinson",
        "ellipsoid", "empirical_cdf", "empirical_inv",
        "empirical_pdf", "empirical_rnd", "eomday",
        "errorbar", "etime", "etreeplot", "example",
        "expcdf", "expinv", "expm", "exppdf", "exprnd",
        "ezcontour", "ezcontourf", "ezmesh", "ezmeshc",
        "ezplot", "ezpolar", "ezsurf", "ezsurfc", "factor",
        "factorial", "fail", "fcdf", "feather", "fftconv",
        "fftfilt", "fftshift", "figure", "fileattrib",
        "fileparts", "fill", "findall", "findobj",
        "findstr", "finv", "flag", "flipdim", "fliplr",
        "flipud", "fpdf", "fplot", "fractdiff", "freqz",
        "freqz_plot", "frnd", "fsolve",
        "f_test_regression", "ftp", "fullfile", "fzero",
        "gamcdf", "gaminv", "gampdf", "gamrnd", "gca",
        "gcbf", "gcbo", "gcf", "genvarname", "geocdf",
        "geoinv", "geopdf", "geornd", "getfield", "ginput",
        "glpk", "gls", "gplot", "gradient",
        "graphics_toolkit", "gray", "grid", "griddata",
        "griddatan", "gtext", "gunzip", "gzip", "hadamard",
        "hamming", "hankel", "hanning", "hggroup",
        "hidden", "hilb", "hist", "histc", "hold", "hot",
        "hotelling_test", "housh", "hsv", "hurst",
        "hygecdf", "hygeinv", "hygepdf", "hygernd",
        "idivide", "ifftshift", "image", "imagesc",
        "imfinfo", "imread", "imshow", "imwrite", "index",
        "info", "inpolygon", "inputname", "interpft",
        "interpn", "intersect", "invhilb", "iqr", "isa",
        "isdefinite", "isdir", "is_duplicate_entry",
        "isequal", "isequalwithequalnans", "isfigure",
        "ishermitian", "ishghandle", "is_leap_year",
        "isletter", "ismac", "ismember", "ispc", "isprime",
        "isprop", "isscalar", "issquare", "isstrprop",
        "issymmetric", "isunix", "is_valid_file_id",
        "isvector", "jet", "kendall",
        "kolmogorov_smirnov_cdf",
        "kolmogorov_smirnov_test", "kruskal_wallis_test",
        "krylov", "kurtosis", "laplace_cdf", "laplace_inv",
        "laplace_pdf", "laplace_rnd", "legend", "legendre",
        "license", "line", "linkprop", "list_primes",
        "loadaudio", "loadobj", "logistic_cdf",
        "logistic_inv", "logistic_pdf", "logistic_rnd",
        "logit", "loglog", "loglogerr", "logm", "logncdf",
        "logninv", "lognpdf", "lognrnd", "logspace",
        "lookfor", "ls_command", "lsqnonneg", "magic",
        "mahalanobis", "manova", "matlabroot",
        "mcnemar_test", "mean", "meansq", "median", "menu",
        "mesh", "meshc", "meshgrid", "meshz", "mexext",
        "mget", "mkpp", "mode", "moment", "movefile",
        "mpoles", "mput", "namelengthmax", "nargchk",
        "nargoutchk", "nbincdf", "nbininv", "nbinpdf",
        "nbinrnd", "nchoosek", "ndgrid", "newplot", "news",
        "nonzeros", "normcdf", "normest", "norminv",
        "normpdf", "normrnd", "now", "nthroot", "null",
        "ocean", "ols", "onenormest", "optimget",
        "optimset", "orderfields", "orient", "orth",
        "pack", "pareto", "parseparams", "pascal", "patch",
        "pathdef", "pcg", "pchip", "pcolor", "pcr",
        "peaks", "periodogram", "perl", "perms", "pie",
        "pink", "planerot", "playaudio", "plot",
        "plotmatrix", "plotyy", "poisscdf", "poissinv",
        "poisspdf", "poissrnd", "polar", "poly",
        "polyaffine", "polyarea", "polyderiv", "polyfit",
        "polygcd", "polyint", "polyout", "polyreduce",
        "polyval", "polyvalm", "postpad", "powerset",
        "ppder", "ppint", "ppjumps", "ppplot", "ppval",
        "pqpnonneg", "prepad", "primes", "print",
        "print_usage", "prism", "probit", "qp", "qqplot",
        "quadcc", "quadgk", "quadl", "quadv", "quiver",
        "qzhess", "rainbow", "randi", "range", "rank",
        "ranks", "rat", "reallog", "realpow", "realsqrt",
        "record", "rectangle_lw", "rectangle_sw",
        "rectint", "refresh", "refreshdata",
        "regexptranslate", "repmat", "residue", "ribbon",
        "rindex", "roots", "rose", "rosser", "rotdim",
        "rref", "run", "run_count", "rundemos", "run_test",
        "runtests", "saveas", "saveaudio", "saveobj",
        "savepath", "scatter", "secd", "semilogx",
        "semilogxerr", "semilogy", "semilogyerr",
        "setaudio", "setdiff", "setfield", "setxor",
        "shading", "shift", "shiftdim", "sign_test",
        "sinc", "sind", "sinetone", "sinewave", "skewness",
        "slice", "sombrero", "sortrows", "spaugment",
        "spconvert", "spdiags", "spearman", "spectral_adf",
        "spectral_xdf", "specular", "speed", "spencer",
        "speye", "spfun", "sphere", "spinmap", "spline",
        "spones", "sprand", "sprandn", "sprandsym",
        "spring", "spstats", "spy", "sqp", "stairs",
        "statistics", "std", "stdnormal_cdf",
        "stdnormal_inv", "stdnormal_pdf", "stdnormal_rnd",
        "stem", "stft", "strcat", "strchr", "strjust",
        "strmatch", "strread", "strsplit", "strtok",
        "strtrim", "strtrunc", "structfun", "studentize",
        "subplot", "subsindex", "subspace", "substr",
        "substruct", "summer", "surf", "surface", "surfc",
        "surfl", "surfnorm", "svds", "swapbytes",
        "sylvester_matrix", "symvar", "synthesis", "table",
        "tand", "tar", "tcdf", "tempdir", "tempname",
        "test", "text", "textread", "textscan", "tinv",
        "title", "toeplitz", "tpdf", "trace", "trapz",
        "treelayout", "treeplot", "triangle_lw",
        "triangle_sw", "tril", "trimesh", "triplequad",
        "triplot", "trisurf", "triu", "trnd", "tsearchn",
        "t_test", "t_test_regression", "type", "unidcdf",
        "unidinv", "unidpdf", "unidrnd", "unifcdf",
        "unifinv", "unifpdf", "unifrnd", "union", "unique",
        "unix", "unmkpp", "unpack", "untabify", "untar",
        "unwrap", "unzip", "u_test", "validatestring",
        "vander", "var", "var_test", "vech", "ver",
        "version", "view", "voronoi", "voronoin",
        "waitforbuttonpress", "wavread", "wavwrite",
        "wblcdf", "wblinv", "wblpdf", "wblrnd", "weekday",
        "welch_test", "what", "white", "whitebg",
        "wienrnd", "wilcoxon_test", "wilkinson", "winter",
        "xlabel", "xlim", "ylabel", "yulewalker", "zip",
        "zlabel", "z_test")

    loadable_kw = (
        "airy", "amd", "balance", "besselh", "besseli",
        "besselj", "besselk", "bessely", "bitpack",
        "bsxfun", "builtin", "ccolamd", "cellfun",
        "cellslices", "chol", "choldelete", "cholinsert",
        "cholinv", "cholshift", "cholupdate", "colamd",
        "colloc", "convhulln", "convn", "csymamd",
        "cummax", "cummin", "daspk", "daspk_options",
        "dasrt", "dasrt_options", "dassl", "dassl_options",
        "dbclear", "dbdown", "dbstack", "dbstatus",
        "dbstop", "dbtype", "dbup", "dbwhere", "det",
        "dlmread", "dmperm", "dot", "eig", "eigs",
        "endgrent", "endpwent", "etree", "fft", "fftn",
        "fftw", "filter", "find", "full", "gcd",
        "getgrent", "getgrgid", "getgrnam", "getpwent",
        "getpwnam", "getpwuid", "getrusage", "givens",
        "gmtime", "gnuplot_binary", "hess", "ifft",
        "ifftn", "inv", "isdebugmode", "issparse", "kron",
        "localtime", "lookup", "lsode", "lsode_options",
        "lu", "luinc", "luupdate", "matrix_type", "max",
        "min", "mktime", "pinv", "qr", "qrdelete",
        "qrinsert", "qrshift", "qrupdate", "quad",
        "quad_options", "qz", "rand", "rande", "randg",
        "randn", "randp", "randperm", "rcond", "regexp",
        "regexpi", "regexprep", "schur", "setgrent",
        "setpwent", "sort", "spalloc", "sparse", "spparms",
        "sprank", "sqrtm", "strfind", "strftime",
        "strptime", "strrep", "svd", "svd_driver", "syl",
        "symamd", "symbfact", "symrcm", "time", "tsearch",
        "typecast", "urlread", "urlwrite")

    mapping_kw = (
        "abs", "acos", "acosh", "acot", "acoth", "acsc",
        "acsch", "angle", "arg", "asec", "asech", "asin",
        "asinh", "atan", "atanh", "beta", "betainc",
        "betaln", "bincoeff", "cbrt", "ceil", "conj", "cos",
        "cosh", "cot", "coth", "csc", "csch", "erf", "erfc",
        "erfcx", "erfinv", "exp", "finite", "fix", "floor",
        "fmod", "gamma", "gammainc", "gammaln", "imag",
        "isalnum", "isalpha", "isascii", "iscntrl",
        "isdigit", "isfinite", "isgraph", "isinf",
        "islower", "isna", "isnan", "isprint", "ispunct",
        "isspace", "isupper", "isxdigit", "lcm", "lgamma",
        "log", "lower", "mod", "real", "rem", "round",
        "roundb", "sec", "sech", "sign", "sin", "sinh",
        "sqrt", "tan", "tanh", "toascii", "tolower", "xor")

    builtin_consts = (
        "EDITOR", "EXEC_PATH", "I", "IMAGE_PATH", "NA",
        "OCTAVE_HOME", "OCTAVE_VERSION", "PAGER",
        "PAGER_FLAGS", "SEEK_CUR", "SEEK_END", "SEEK_SET",
        "SIG", "S_ISBLK", "S_ISCHR", "S_ISDIR", "S_ISFIFO",
        "S_ISLNK", "S_ISREG", "S_ISSOCK", "WCONTINUE",
        "WCOREDUMP", "WEXITSTATUS", "WIFCONTINUED",
        "WIFEXITED", "WIFSIGNALED", "WIFSTOPPED", "WNOHANG",
        "WSTOPSIG", "WTERMSIG", "WUNTRACED")

    tokens = {
        'root': [
            # We should look into multiline comments
            (r'[%#].*$', Comment),
            (r'^\s*function', Keyword, 'deffunc'),

            # from 'iskeyword' on hg changeset 8cc154f45e37
            (words((
                '__FILE__', '__LINE__', 'break', 'case', 'catch', 'classdef', 'continue', 'do', 'else',
                'elseif', 'end', 'end_try_catch', 'end_unwind_protect', 'endclassdef',
                'endevents', 'endfor', 'endfunction', 'endif', 'endmethods', 'endproperties',
                'endswitch', 'endwhile', 'events', 'for', 'function', 'get', 'global', 'if', 'methods',
                'otherwise', 'persistent', 'properties', 'return', 'set', 'static', 'switch', 'try',
                'until', 'unwind_protect', 'unwind_protect_cleanup', 'while'), suffix=r'\b'),
             Keyword),

            (words(builtin_kw + command_kw + function_kw + loadable_kw + mapping_kw,
                   suffix=r'\b'),  Name.Builtin),

            (words(builtin_consts, suffix=r'\b'), Name.Constant),

            # operators in Octave but not Matlab:
            (r'-=|!=|!|/=|--', Operator),
            # operators:
            (r'-|==|~=|<|>|<=|>=|&&|&|~|\|\|?', Operator),
            # operators in Octave but not Matlab requiring escape for re:
            (r'\*=|\+=|\^=|\/=|\\=|\*\*|\+\+|\.\*\*', Operator),
            # operators requiring escape for re:
            (r'\.\*|\*|\+|\.\^|\.\\|\.\/|\/|\\', Operator),


            # punctuation:
            (r'[\[\](){}:@.,]', Punctuation),
            (r'=|:|;', Punctuation),

            (r'"[^"]*"', String),

            (r'(\d+\.\d*|\d*\.\d+)([eEf][+-]?[0-9]+)?', Number.Float),
            (r'\d+[eEf][+-]?[0-9]+', Number.Float),
            (r'\d+', Number.Integer),

            # quote can be transpose, instead of string:
            # (not great, but handles common cases...)
            (r'(?<=[\w)\].])\'+', Operator),
            (r'(?<![\w)\].])\'', String, 'string'),

            (r'[a-zA-Z_]\w*', Name),
            (r'.', Text),
        ],
        'string': [
            (r"[^']*'", String, '#pop'),
        ],
        'deffunc': [
            (r'(\s*)(?:(.+)(\s*)(=)(\s*))?(.+)(\()(.*)(\))(\s*)',
             bygroups(Whitespace, Text, Whitespace, Punctuation,
                      Whitespace, Name.Function, Punctuation, Text,
                      Punctuation, Whitespace), '#pop'),
            # function with no args
            (r'(\s*)([a-zA-Z_]\w*)', bygroups(Text, Name.Function), '#pop'),
        ],
    }


class ScilabLexer(RegexLexer):
    """
    For Scilab source code.

    .. versionadded:: 1.5
    """
    name = 'Scilab'
    aliases = ['scilab']
    filenames = ['*.sci', '*.sce', '*.tst']
    mimetypes = ['text/scilab']

    tokens = {
        'root': [
            (r'//.*?$', Comment.Single),
            (r'^\s*function', Keyword, 'deffunc'),

            (words((
                '__FILE__', '__LINE__', 'break', 'case', 'catch', 'classdef', 'continue', 'do', 'else',
                'elseif', 'end', 'end_try_catch', 'end_unwind_protect', 'endclassdef',
                'endevents', 'endfor', 'endfunction', 'endif', 'endmethods', 'endproperties',
                'endswitch', 'endwhile', 'events', 'for', 'function', 'get', 'global', 'if', 'methods',
                'otherwise', 'persistent', 'properties', 'return', 'set', 'static', 'switch', 'try',
                'until', 'unwind_protect', 'unwind_protect_cleanup', 'while'), suffix=r'\b'),
             Keyword),

            (words(_scilab_builtins.functions_kw +
                   _scilab_builtins.commands_kw +
                   _scilab_builtins.macros_kw, suffix=r'\b'), Name.Builtin),

            (words(_scilab_builtins.variables_kw, suffix=r'\b'), Name.Constant),

            # operators:
            (r'-|==|~=|<|>|<=|>=|&&|&|~|\|\|?', Operator),
            # operators requiring escape for re:
            (r'\.\*|\*|\+|\.\^|\.\\|\.\/|\/|\\', Operator),

            # punctuation:
            (r'[\[\](){}@.,=:;]', Punctuation),

            (r'"[^"]*"', String),

            # quote can be transpose, instead of string:
            # (not great, but handles common cases...)
            (r'(?<=[\w)\].])\'+', Operator),
            (r'(?<![\w)\].])\'', String, 'string'),

            (r'(\d+\.\d*|\d*\.\d+)([eEf][+-]?[0-9]+)?', Number.Float),
            (r'\d+[eEf][+-]?[0-9]+', Number.Float),
            (r'\d+', Number.Integer),

            (r'[a-zA-Z_]\w*', Name),
            (r'.', Text),
        ],
        'string': [
            (r"[^']*'", String, '#pop'),
            (r'.', String, '#pop'),
        ],
        'deffunc': [
            (r'(\s*)(?:(.+)(\s*)(=)(\s*))?(.+)(\()(.*)(\))(\s*)',
             bygroups(Whitespace, Text, Whitespace, Punctuation,
                      Whitespace, Name.Function, Punctuation, Text,
                      Punctuation, Whitespace), '#pop'),
            # function with no args
            (r'(\s*)([a-zA-Z_]\w*)', bygroups(Text, Name.Function), '#pop'),
        ],
    }
