--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/abcfield.py	Sat Apr 21 19:47:30 2012 +0100
@@ -0,0 +1,138 @@
+#!/usr/bin/env python
+#
+# Extact a text field (title, by default) from a .abc file, and print it out
+# formatted for use in LaTeX or HTML.
+#
+
+import optparse
+import sys
+
+accentedletters = {
+    # Acute accents
+    "'A" : ("Á", "\\'{A}"),
+    "'E" : ("É", "\\'{E}"),
+    "'I" : ("Í", "\\'{I}"),
+    "'O" : ("Ó", "\\'{O}"),
+    "'U" : ("Ú", "\\'{U}"),
+    "'Y" : ("Ý", "\\'{Y}"),
+    "'a" : ("á", "\\'{a}"),
+    "'e" : ("é", "\\'{e}"),
+    "'i" : ("í", "\\'{i}"),
+    "'o" : ("ó", "\\'{o}"),
+    "'u" : ("ú", "\\'{u}"),
+    "'y" : ("ý", "\\'{y}"),
+
+    # Grave accents
+    "`A" : ("À", "\\`{A}"),
+    "`E" : ("È", "\\`{E}"),
+    "`I" : ("Ì", "\\`{I}"),
+    "`O" : ("Ò", "\\`{O}"),
+    "`U" : ("Ù", "\\`{U}"),
+    "`a" : ("à", "\\`{a}"),
+    "`e" : ("è", "\\`{e}"),
+    "`i" : ("ì", "\\`{i}"),
+    "`o" : ("ò", "\\`{o}"),
+    "`u" : ("ù", "\\`{u}"),
+
+    # Umlauts
+    "\"A" : ("Ä", "\\\"{A}"),
+    "\"E" : ("Ë", "\\\"{E}"),
+    "\"I" : ("Ï", "\\\"{I}"),
+    "\"O" : ("Ö", "\\\"{O}"),
+    "\"U" : ("Ü", "\\\"{U}"),
+    "\"Y" : ("Ÿ", "\\\"{Y}"),
+    "\"a" : ("ä", "\\\"{a}"),
+    "\"e" : ("ë", "\\\"{e}"),
+    "\"i" : ("ï", "\\\"{\i}"),
+    "\"o" : ("ö", "\\\"{o}"),
+    "\"u" : ("ü", "\\\"{u}"),
+    "\"y" : ("ÿ", "\\\"{y}"),
+
+    # Circumflexes
+    "^A" : ("Â", "\\^{A}"),
+    "^E" : ("Ê", "\\^{E}"),
+    "^I" : ("Î", "\\^{I}"),
+    "^O" : ("Ô", "\\^{O}"),
+    "^U" : ("Û", "\\^{U}"),
+    "^a" : ("â", "\\^{a}"),
+    "^e" : ("ê", "\\^{e}"),
+    "^i" : ("î", "\\^{\i}"),
+    "^o" : ("ô", "\\^{o}"),
+    "^u" : ("û", "\\^{u}"),
+
+    # Tilde
+    "~A" : ("Ã", "\\~{A}"),
+    "~N" : ("Ñ", "\\~{N}"),
+    "~O" : ("Õ", "\\~{O}"),
+    "~a" : ("ã", "\\~{a}"),
+    "~n" : ("ñ", "\\~{n}"),
+    "~o" : ("õ", "\\~{o}"),
+
+    # Cedilla
+    ",C" : ("Ç", "\\c{C}"),
+    ",c" : ("ç", "\\c{c}"),
+
+    # Slash
+    "/O" : ("Ø", "\\O"),
+    "/o" : ("ø", "\\o"),
+
+    # Ring
+    "AA" : ("Å", "\\r{A}"),
+    "aa" : ("å", "\\r{a}"),
+
+    # Ligatures
+    "AE" : ("Æ", "\\AE"),
+    "ae" : ("æ", "\\ae"),
+    "ss" : ("ß", "\\ss"),
+}
+
+def convertTitle(t, options):
+    res = ""
+    while True:
+        p = t.partition('\\')
+        res += p[0]
+        if p[1] == "":
+            break
+        abc = p[2][0:2]
+        t = p[2][2:]
+        if (options.html or options.latex) and abc in accentedletters:
+            if options.html:
+                res += accentedletters[abc][0]
+            else:
+                res += accentedletters[abc][1]
+        else:
+            res += "\\" + abc
+    return res
+
+def process(inf, options):
+    for line in inf:
+        line = line.strip()
+        if len(line) > 2 and line[0] == options.field and line[1] == ':':
+            print(convertTitle(line[2:].strip(), options))
+            break
+
+parser = optparse.OptionParser(usage="usage: %prog [options] [filename]\n\n"
+                                     "  Extract field data from ABC file.")
+parser.add_option("-f", "--field", dest="field", default="T",
+                  help="extract the field FIELD", metavar="FIELD")
+parser.add_option("-m", "--html", dest="html",
+                  action="store_true", default=False,
+                  help="format output for HTML")
+parser.add_option("-l", "--latex", dest="latex",
+                  action="store_true", default=False,
+                  help="format ouput for LaTeX")
+(options, args) = parser.parse_args()
+
+if options.html and options.latex:
+    sys.exit("You must choose one of HTML or LaTeX output")
+
+if len(args) > 0:
+    for arg in args:
+        try:
+            inf = open(arg, "r")
+            process(inf, options)
+        finally:
+            inf.close()
+else:
+    process(sys.stdin, options)
+sys.exit(0)