The Annoyance Filter.pdf - Fourmilab
The Annoyance Filter.pdf - Fourmilab
The Annoyance Filter.pdf - Fourmilab
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§237 ANNOYANCE-FILTER HEADER INCLUDE FILES 187<br />
237. Some capabilities of the program depend in non-trivial ways on the presence of certain system<br />
features detected by the ./configure script. Here we test for the prerequisites and define an internal<br />
tag to enable the feature if all are met.<br />
〈 Configuration of conditional capabilities 237 〉 ≡<br />
#if defined (HAVE_GNUPLOT) ∧ defined (HAVE_NETPBM) ∧ defined (HAVE_SYSTEM)<br />
#define HAVE_PLOT_UTILITIES<br />
#endif<br />
#if defined (HAVE_DIRENT_H) ∧ defined (HAVE_STAT)<br />
#define HAVE_DIRECTORY_TRAVERSAL<br />
#endif<br />
#if defined (HAVE_PDFTOTEXT) ∧ defined (HAVE_POPEN) ∧ (defined (HAVE_MKSTEMP) ∨ defined<br />
(HAVE_TMPNAM))<br />
#define HAVE_PDF_DECODER<br />
#endif<br />
This code is used in section 232.<br />
238. It’s a pain in the posterior to have to edit the config.h file to disable features not supported<br />
on Win32 platforms. Since we can’t run ./configure there, the process can’t be automated. So, we<br />
take the lazy way out and manually undefine features absent on Win32, even if they were auto-detected<br />
on the platform which generated config.h. Tacky.<br />
〈 Tweak configuration when building for Win32 238 〉 ≡<br />
#ifdef WIN32<br />
#undef HAVE_MMAP<br />
#endif<br />
This code is used in section 232.<br />
239. <strong>The</strong> following global variables are used to keep track of command line options.<br />
#define Annotate (c) (annotations .test (c)) /∗ Test if annotation is requested ∗/<br />
〈 Command line arguments 239 〉 ≡<br />
static double mailBias = 2.0; /∗ Bias for words in legitimate mail ∗/<br />
static unsigned int minOccurrences = 5; /∗ Minimum occurrences to trust probability ∗/<br />
static double junkThreshold = 0.9; /∗ Threshold above which we classify mail as junk ∗/<br />
static double mailThreshold = 0.9; /∗ Threshold below which we classify as mail ∗/<br />
static int significantWords = 15; /∗ Number of words to use in classifying message ∗/<br />
static double novelWordProbability = 0.2;<br />
/∗ Probability assigned to words not in dictionary ∗/<br />
static bitset〈1 ≪ (sizeof (char) ∗ 8)〉 annotations ; /∗ Annotations requested in transcript ∗/<br />
#ifdef POP3_PROXY_SERVER<br />
static int popProxyPort = 9110; /∗ POP3 proxy server listen port ∗/<br />
static string popProxyServer = "";<br />
/∗ POP3 server (IP address or fully-qualified domain name) ∗/<br />
static int popProxyServerPort = 110; /∗ POP3 server port ∗/<br />
#endif<br />
static bool bsdFolder = false ; /∗ Does mail folder use pure BSD “From␣” semantics ? ∗/<br />
See also section 240.<br />
This code is used in section 254.<br />
240. <strong>The</strong>se globals are used to check for inconsistent option specifications.<br />
〈 Command line arguments 239 〉 +≡<br />
static unsigned int nTested = 0; /∗ Number of messages tested ∗/
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