#!/usr/bin/python
# a python script to convert a GAP
# log file into a latex file
# usage:
# gap2latex.py gapsession.glog gapsession.tex
# ** suggest using glog as gap log extension to avoid over-writing **
# ** log file when compiling latex file in same directory!         **
#
#wdj, 2-8-2005
import sys

try:
    inputfile=sys.argv[1]
    outputfile=sys.argv[2]
except:
    print "Usage: ",sys.argv[0]," <inputfile> <outputfile>"
    sys.exit()

prompt=True
begin=False
ifile=open(inputfile,"r")
ofile=open(outputfile,"w")

ofile.write("""
\documentclass[12pt]{article}

\usepackage{color}
\usepackage{amssymb}
\usepackage{amsmath}

\def\\rrr{{\mathbb{R}}}
\def\qqq{\mathbb{Q}}
\def\ccc{\mathbb{C}}
\def\zzz{\mathbb{Z}}

\oddsidemargin -.25in
\\textwidth 6.75in
\\topmargin -.5in
\\textheight 9in
\\begin{document}
\n
\\noindent
""")

for line in ifile:
    firstpart=line[:4]

    if ">"==firstpart[:1]:
        prompt=True
        ofile.write("\\textcolor{red}{$>$}\\verb+ %s +\n\\newline\n" %line[2:len(line)-1])

    if "gap>"==firstpart and prompt==True:
        prompt=True
        ofile.write("\\textcolor{red}{gap$>$}{\\verb+%s+}\n\\newline\n" %line[4:len(line)-1])
        
    if "#"==firstpart[:1] and prompt==True:
        ofile.write("\\textcolor{blue}{$\#$}\\verb+ %s +\n\\newline\n" %line[2:len(line)-1])

    if "brk>"==firstpart and prompt==True:
        prompt=True
        ofile.write("\\textcolor{orange}{brk$>$}\\verb+ %s +\n\\newline\n" %line[4:len(line)-1])

    if "brk>"==firstpart and prompt==False:
        prompt=True
        begin=False
        ofile.write("\end{verbatim} }}\\noindent")
        ofile.write("\\textcolor{green}{brk$>$}\\verb+ %s +\n\\newline\n" %line[4:len(line)-1])
        
    if not("#"==firstpart[:1]) and not("brk>"==firstpart) and not("gap>"==firstpart) and not(">"==firstpart[:1]) and prompt==True:
        ofile.write("\n {\small{\\begin{verbatim} \n")
        prompt=False
        begin=True

    if not("#"==firstpart[:1]) and not("brk>"==firstpart) and not("gap>"==firstpart) and not(">"==firstpart[:1]) and prompt==False:
        prompt=False
        ofile.write("%s \n" %line[:len(line)-1])

    if "gap>"==firstpart and prompt==False:
        prompt=True
        begin=False
        ofile.write("\end{verbatim} }}\\noindent")
        ofile.write("\\textcolor{red}{gap$>$}\\verb+%s +\n\\newline\n" %line[4:len(line)-1])

if begin:
    ofile.write("\n \end{verbatim} }}\n\end{document}")

if not(begin):
    ofile.write("""
    \n
    \end{document}
    """)

ifile.close()
ofile.close()