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doctorBuffer_utils.c
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doctorBuffer_utils.c
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/***************************************************************
Copyright (C) 2006-2014 Hewlett-Packard Development Company, L.P.
Copyright (C) 2014, Siemens AG
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
version 2 as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
***************************************************************/
#include "doctorBuffer_utils.h"
#define INVISIBLE (int) '\377'
#include "nomos.h"
#include "list.h"
#include "util.h"
#include "nomos_regex.h"
/**
* \file
* \brief Doctor buffer utilities for debugging
*/
/**
* \brief garbage collect: eliminate all INVISIBLE characters in the buffer
* \param[in,out] textBuffer Buffer to compress
* \return Size difference between orifinal and compressed buffer
*/
int compressDoctoredBuffer( char* textBuffer)
{
int previous=strlen(textBuffer);
if(cur.docBufferPositionsAndOffsets)
g_array_free(cur.docBufferPositionsAndOffsets, TRUE);
cur.docBufferPositionsAndOffsets=collapseInvisible(textBuffer,INVISIBLE);
// cur.docBufferPositionsAndOffsets=collapseSpaces(textBuffer);
int after = strlen(textBuffer);
return previous - after;
}
/**
* \brief Remove HTML comments from buffer without removing comment text
* \param[in,out] buf
*/
void removeHtmlComments(char* buf)
{
int f;
int g;
char* cp;
f = 0;
g = 0;
for (cp = buf; cp && *cp; cp++)
{
if ((*cp == '<') && (*(cp + 1) != '<') && (*(cp + 1) != ' '))
{
#if (DEBUG>5) && defined(DOCTOR_DEBUG)
int x = strncasecmp(cp, "<string", 7);
printf("CHECK: %c%c%c%c%c%c%c == %d\n", *cp,
*(cp+1), *(cp+2), *(cp+3), *(cp+4),
*(cp+5), *(cp+6), x);
#endif /* DEBUG>5 && DOCTOR_DEBUG */
if (strncasecmp(cp, "<string", 7))
{
*cp = ' ';
if (*(cp + 1) != '-' || *(cp + 2) != '-')
{
f = 1;
}
}
}
else if (*cp == '&')
{
#if (DEBUG>5) && defined(DOCTOR_DEBUG)
int x = strncasecmp(cp, "©", 6);
printf("CHECK: %c%c%c%c%c%c == %d\n", *cp,
*(cp+1), *(cp+2), *(cp+3), *(cp+4),
*(cp+5), x);
#endif /* DEBUG>5 && DOCTOR_DEBUG */
if (strncasecmp(cp, "©", 6))
{
*cp = ' ';
g = 1;
}
}
else if (f && (*cp == '>'))
{
*cp = ' ';
f = 0;
}
else if (g && (*cp == ';'))
{
*cp = ' ';
g = 0;
}
else if (isEOL(*cp))
{
g = 0;
}
/* Don't remove text in an HTML comment (e.g., turn the flag off) */
else if ((*cp == '!') && f && (cp != buf) && (*(cp - 1) == ' '))
{
*cp = ' ';
f = 0;
}
else if (f || g)
{
// *cp = INVISIBLE; larry comment out this line, I do not think this logic is correct
}
else if ((*cp == '<') || (*cp == '>'))
{
*cp = ' ';
}
}
}
/**
* \brief Remove comments that start at the beginning of a line
*
* Comments like *, ^dnl, ^xcomm, ^comment, and // preserving the comment text
* \param[in,out] buf
*/
void removeLineComments(char* buf)
{
char* cp;
char* MODULE_LICENSE = "MODULE_LICENSE";
cp = buf;
while (idxGrep(_UTIL_BOL_MAGIC, cp, REG_ICASE | REG_NEWLINE | REG_EXTENDED))
{
#ifdef DOCTOR_DEBUG
dumpMatch(cp, "Found \"comment\"-text");
#endif /* DOCTOR_DEBUG */
cp += cur.regm.rm_so;
switch (*cp)
{
case '>':
*cp++ = ' ';
break;
case '@': /* texi special processing */
*cp++ = INVISIBLE;
if (strncasecmp(cp, "author", 6) == 0)
{
(void) memset(cp, ' ', 6);
cp += 6;
}
else if (strncasecmp(cp, "comment", 7) == 0)
{
(void) memset(cp, ' ', 7);
cp += 7;
}
else if (strncasecmp(cp, "center", 6) == 0)
{
(void) memset(cp, ' ', 6);
cp += 6;
}
else if (strncasecmp(cp, "rem", 3) == 0)
{
(void) memset(cp, ' ', 3);
cp += 3;
}
else if (*cp == 'c')
{
*cp++ = INVISIBLE;
if (strncasecmp(cp, " essay", 6) == 0)
{
(void) memset(cp, ' ', 6);
cp += 6;
}
}
break;
case '/': /* c++ style comment // */
if (cp && cp[0])
{
/** when MODULE_LICENSE("GPL") is outcommented, do not get rid of this line. */
if (strstr(cp, MODULE_LICENSE) && '/' == cp[0])
{
(void) memset(cp, INVISIBLE, strlen(cp));
cp += strlen(cp);
}
else
{
(void) memset(cp, INVISIBLE, 2);
cp += 2;
}
}
break;
case '\\': /* c++ style comment // */
if (strncasecmp(cp + 1, "par ", 3) == 0)
{
(void) memset(cp, ' ', 4);
}
cp += 4;
break;
case 'r':
case 'R': /* rem */
case 'd':
case 'D': /* dnl */
(void) memset(cp, INVISIBLE, 3);
cp += 3;
break;
case 'x':
case 'X': /* xcomm */
(void) memset(cp, INVISIBLE, 5);
cp += 5;
break;
case 'c':
case 'C': /* comment */
(void) memset(cp, INVISIBLE, 7);
cp += 7;
break;
case '%': /* %%copyright: */
(void) memset(cp, INVISIBLE, 12);
cp += 12;
break;
}
}
}
/**
* \brief Remove newlines from buffer
* \param[in,out] buf
*/
void cleanUpPostscript(char* buf)
{
char* cp;
char* x;
cp = buf;
while (idxGrep(_UTIL_POSTSCR, cp, REG_EXTENDED | REG_NEWLINE))
{
#ifdef DOCTOR_DEBUG
dumpMatch(cp, "FOUND postscript-thingy");
#endif /* DOCTOR_DEBUG */
x = cp + cur.regm.rm_so;
cp += cur.regm.rm_eo;
while (x < cp)
{
*x++ = ' '/*INVISIBLE*/;
}
}
}
/**
* \brief Remove groff/troff font-size indicators, the literal
* string backslash-n and all backslahes, ala
*
* `perl -pe 's,\\s[+-][0-9]*,,g;s,\\s[0-9]*,,g;s/\\n//g;' | f`
* \param[in,out] buf
*/
void removeBackslashesAndGTroffIndicators(char* buf)
{
char* cp;
char* x;
for (cp = buf; *cp; cp++)
{
if (*cp == '\\')
{
x = cp + 1;
if (*x && (*x == 's'))
{
x++;
if (*x && ((*x == '+') || (*x == '-')))
{
x++;
}
while (*x && isdigit(*x))
{
x++;
}
}
else if (*x && *x == 'n')
{
x++;
}
memset(cp, /*INVISIBLE*/' ', (size_t) (x - cp));
}
}
}
/**
* \brief Convert white-space to real spaces, and remove
* unnecessary punctuation
*
* `tr -d '*=+#$|%.,:;!?()\\][\140\047\042' | tr '\011\012\015' ' '`
* \param[in,out] buf
* \note We purposely do NOT process backspace-characters here. Perhaps
* there's an improvement in the wings for this?
*/
void convertWhitespaceToSpaceAndRemoveSpecialChars(char* buf, int isCR )
{
char* cp;
for (cp = buf; /*cp < end &&*/*cp; cp++)
{
if ((*cp == '\302') && (*(cp + 1) == '\251'))
{
cp += 1;
continue;
}
if (*cp & (char) 0x80)
{
*cp = INVISIBLE;
continue;
}
switch (*cp)
{
/*
Convert eol-characters AND some other miscellaneous
characters into spaces (due to comment-styles, etc.)
*/
case '\a':
case '\t':
case '\n':
case '\r':
case '\v':
case '\f':
case '[':
case ']':
case '{':
case '}':
case '*':
case '=':
case '#':
case '$':
case '|':
case '%':
case '!':
case '?':
case '`':
case '"':
case '\'':
*cp = ' ';
break;
/* allow + only within the regex " [Mm]\+ " */
case '+':
if (*(cp + 1) == 0 || *(cp + 1) == ' ' || *(cp + 1) == '\t' || *(cp + 1) == '\n' || *(cp + 1) == '\r')
break;
else if (cp > buf + 1 && (*(cp - 1) == 'M' || *(cp - 1) == 'm') && *(cp - 2) == ' ' && *(cp + 1) == ' ')
{
/* no-op */
}
else
{
*cp = ' ';
}
break;
case '(':
if ((*(cp + 1) == 'C' || *(cp + 1) == 'c') && *(cp + 2) == ')')
{
cp += 2;
continue;
}
else
{
*cp = ' ';
}
break;
case ')':
case ',':
case ':':
case ';':
if (!isCR)
{
*cp = ' ';
}
break;
case '.':
if (!isCR)
{
*cp = INVISIBLE;
}
break;
case '<':
if (strncasecmp(cp, "<string", 7) == 0)
{
(void) strncpy(cp, " ", 7);
}
break;
/* CDB - Big #ifdef 0 left out */
case '\001':
case '\002':
case '\003':
case '\004':
case '\005':
case '\006':
case '\016':
case '\017':
case '\020':
case '\021':
case '\022':
case '\023':
case '\024':
case '\025':
case '\026':
case '\027':
case '\030':
case '\031':
case '\032':
case '\033':
case '\034':
case '\035':
case '\036':
case '\037':
case '~':
*cp = INVISIBLE;
break;
#ifdef DOCTOR_DEBUG
case ' ': case '/': case '-': case '@': case '&':
case '>': case '^': case '_':
case INVISIBLE:
break;
default:
if (!isalpha(*cp) && !isdigit(*cp))
{
printf("DEBUG: \\0%o @ %ld\n",
*cp & 0xff, cp-buf);
}
break;
#endif /* DOCTOR_DEBUG */
}
}
}
/**
* Look for hyphenations of words, to compress both halves into a
* single (sic) word. Regex == "[a-z]- [a-z]".
* \param[in,out] buf
* \note Not sure this will work based on the way we strip punctuation
* out of the buffer above -- work on this later.
*/
void dehyphen(char* buf)
{
char* cp;
for (cp = buf; idxGrep(_UTIL_HYPHEN, cp, REG_ICASE); /*nada*/)
{
#ifdef DOCTOR_DEBUG
char* x;
x = cp + cur.regm.rm_so;
while ((x > cp) && !isspace(*x))
{
x--;
}
printf("Hey! hyphenated-word [");
for (++x; x <= (cp + cur.regm.rm_eo); x++)
{
printf("%c", *x);
}
while (!isspace(*x))
{
printf("%c", *x++);
}
printf("]\n");
#endif /* DOCTOR_DEBUG */
cp += cur.regm.rm_so + 1;
*cp++ = INVISIBLE;
while (isspace(*cp))
{
*cp++ = INVISIBLE;
}
}
}
/**
* \brief Clean up miscellaneous punctuation
*
* `perl -pe 's,[-_/]+ , ,g;s/print[_a-zA-Z]* //g;s/ / /g;'`
* \param[in,out] buf
*/
void removePunctuation(char* buf)
{
char* cp;
char* x;
for (cp = buf; idxGrep(_UTIL_MISCPUNCT, cp, REG_EXTENDED); /*nada*/)
{
x = cp + cur.regm.rm_so;
cp += cur.regm.rm_eo - 1; /* leave ' ' alone */
while (x < cp)
{
*x++ = ' ';
}
cp++;
}
for (cp = buf; idxGrep(_UTIL_LATEX, cp, REG_ICASE); /*nada*/)
{
x = cp + cur.regm.rm_so;
cp += cur.regm.rm_eo;
while (x <= cp)
{
*x++ = ' ';
}
cp++;
}
}
/**
* \brief Ignore function calls to print routines
*
* Only concentrate on what's being printed (sometimes programs do print
* licensing information) -- but don't ignore real words that END in 'print',
* like footprint and fingerprint.
*
* Here, we take a risk and just look for a 't' (in "footprint"), or for an
* 'r' (in "fingerprint"). If someone has ever coded a print routine that
* is named 'rprint' or tprint', we're spoofed.
* \param[in,out] buf
*/
void ignoreFunctionCalls(char* buf)
{
char* cp;
char* x;
for (cp = buf; idxGrep(_UTIL_PRINT, cp, REG_ICASE); /*nada*/)
{
x = cp + cur.regm.rm_so;
cp += (cur.regm.rm_eo - 1);
if ((x > buf) && ((*(x - 1) == 'r') || (*(x - 1) == 't')))
{
continue;
}
while (x < cp)
{
*x++ = ' ';
}
cp++;
}
}
/**
* Convert the regex ' [X ]+' (where X is really the character #defined as
* INVISIBLE) to a single space (and a string of INVISIBLE characters).
* \param[in,out] buf
*/
void convertSpaceToInvisible(char* buf)
{
char* cp;
for (cp = buf; *cp; /*nada*/)
{
if (*cp++ == ' ')
{
while (*cp)
{
if (*cp == ' ')
{
*cp++ = INVISIBLE;
}
else if (*cp == INVISIBLE)
{
cp++;
}
else
{
break;
}
}
}
}
}
/**
* \brief Convert a buffer of multiple *stuff* to text-only, separated by spaces
*
* The steps followed in this function are:
* -# Filter HTML/XML comments using removeHtmlComments()
* -# Filter code comments using removeLineComments()
* -# Filter post scripts using cleanUpPostscript()
* -# Filter groff/troff using removeBackslashesAndGTroffIndicators()
* -# Filter spaces and special characters using convertWhitespaceToSpaceAndRemoveSpecialChars()
* -# Filter hyphen strings using dehyphen()
* -# Filter punctuation using removePunctuation()
* -# Ignore print routines using ignoreFunctionCalls()
* -# Filter spaces using convertSpaceToInvisible()
* -# Compress the buffer using compressDoctoredBuffer()
* \param[in,out] buf Buffer to filter
* \param[in] isML Buffer contains HTML/XML data
* \param[in] isPS Buffer contains post script data
* \param[in] isCR
*/
void doctorBuffer(char *buf, int isML, int isPS, int isCR)
{
// printf("\n ==============doctorBuffer is called============================== \n");
// char *cp;
// char *x;
#if defined(PROC_TRACE) || defined(DOCTOR_DEBUG)
traceFunc("== doctorBuffer(%p, %d, %d, %d)\n", buf, isML, isPS, isCR);
#endif /* PROC_TRACE || DOCTOR_DEBUG */
/*
* convert a buffer of multiple *stuff* to text-only, separated by spaces
* We really only care about text "in a license" here, so strip out
* comments and other unwanted punctuation.
*/
#ifdef DOCTOR_DEBUG
printf("***** Processing %p (%d data bytes)\n", buf, (int)strlen(buf));
printf("----- [Dr-BEFORE:] -----\n%s\n[==END==]\n", buf);
#endif /* DOCTOR_DEBUG */
/*
* step 1: take care of embedded HTML/XML and special HTML-chars like
* " and -- but DON'T remove the text in an HTML comment.
* There might be licensing text/information in the comment!
*****
* Later on (in parseLicenses()) we search for URLs in the raw-text
*/
if (isML)
{
#ifdef DOCTOR_DEBUG
printf("DEBUG: markup-languange directives found!\n");
#endif /* DOCTOR_DEBUG */
removeHtmlComments(buf);
}
/*
* step 2: remove comments that start at the beginning of a line, * like
* ^dnl, ^xcomm, ^comment, and //
*/
removeLineComments(buf);
/*
* Step 3 - strip out crap at end-of-line on postscript documents
*/
if (isPS)
{
cleanUpPostscript(buf);
#ifdef DOCTOR_DEBUG
printf("DEBUG: postscript stuff detected!\n");
#endif /* DOCTOR_DEBUG */
}
/*
* - step 4: remove groff/troff font-size indicators, the literal
* string backslash-n and all backslahes, ala:
*==> perl -pe 's,\\s[+-][0-9]*,,g;s,\\s[0-9]*,,g;s/\\n//g;' |
f*/
removeBackslashesAndGTroffIndicators(buf);
/*
* - step 5: convert white-space to real spaces, and remove
* unnecessary punctuation, ala:
*==> tr -d '*=+#$|%.,:;!?()\\][\140\047\042' | tr '\011\012\015' ' '
*****
* NOTE: we purposely do NOT process backspace-characters here. Perhaps
* there's an improvement in the wings for this?
*/
convertWhitespaceToSpaceAndRemoveSpecialChars(buf, isCR);
/*
* Look for hyphenations of words, to compress both halves into a sin-
* gle (sic) word. Regex == "[a-z]- [a-z]".
*****
* NOTE: not sure this will work based on the way we strip punctuation
* out of the buffer above -- work on this later.
*/
dehyphen(buf);
/*
* - step 6: clean up miscellaneous punctuation, ala:
*==> perl -pe 's,[-_/]+ , ,g;s/print[_a-zA-Z]* //g;s/ / /g;'
*/
removePunctuation(buf);
/*
* Ignore function calls to print routines: only concentrate on what's being
* printed (sometimes programs do print licensing information) -- but don't
* ignore real words that END in 'print', like footprint and fingerprint.
* Here, we take a risk and just look for a 't' (in "footprint"), or for an
* 'r' (in "fingerprint"). If someone has ever coded a print routine that
* is named 'rprint' or tprint', we're spoofed.
*/
ignoreFunctionCalls(buf);
/*
* Convert the regex ' [X ]+' (where X is really the character #defined as
* INVISIBLE) to a single space (and a string of INVISIBLE characters).
*/
convertSpaceToInvisible(buf);
/*
* garbage collect: eliminate all INVISIBLE characters in the buffer
*/
#ifdef DOCTOR_DEBUG
int n =
#else
(void)
#endif
compressDoctoredBuffer(buf);
#ifdef DOCTOR_DEBUG
printf("***** Now buffer %p contains %d bytes (%d clipped)\n", buf,
(int)strlen(buf), n);
printf("+++++ [Dr-AFTER] +++++:\n%s\n[==END==]\n", buf);
#endif /* DOCTOR_DEBUG */
return;
}
#ifdef DOCTORBUFFER_OLD
void doctorBuffer_old(char *buf, int isML, int isPS, int isCR)
{
printf("Doctor Buffer old \n");
char *cp;
char *x;
int f;
int g;
int n;
char *MODULE_LICENSE = "MODULE_LICENSE";
#if defined(PROC_TRACE) || defined(DOCTOR_DEBUG)
traceFunc("== doctorBuffer(%p, %d, %d, %d)\n", buf, isML, isPS, isCR);
#endif /* PROC_TRACE || DOCTOR_DEBUG */
/*
* convert a buffer of multiple *stuff* to text-only, separated by spaces
* We really only care about text "in a license" here, so strip out
* comments and other unwanted punctuation.
*/
#ifdef DOCTOR_DEBUG
printf("***** Processing %p (%d data bytes)\n", buf, (int)strlen(buf));
printf("----- [Dr-BEFORE:] -----\n%s\n[==END==]\n", buf);
#endif /* DOCTOR_DEBUG */
/*
* step 1: take care of embedded HTML/XML and special HTML-chars like
* " and -- but DON'T remove the text in an HTML comment.
* There might be licensing text/information in the comment!
*****
* Later on (in parseLicenses()) we search for URLs in the raw-text
*/
if (isML) {
#ifdef DOCTOR_DEBUG
printf("DEBUG: markup-languange directives found!\n");
#endif /* DOCTOR_DEBUG */
f = 0;
g = 0;
for (cp = buf; cp && *cp; cp++) {
if ((*cp == '<') &&
(*(cp+1) != '<') &&
(*(cp+1) != ' ')) {
#if (DEBUG>5) && defined(DOCTOR_DEBUG)
int x = strncasecmp(cp, "<string", 7);
printf("CHECK: %c%c%c%c%c%c%c == %d\n", *cp,
*(cp+1), *(cp+2), *(cp+3), *(cp+4),
*(cp+5), *(cp+6), x);
#endif /* DEBUG>5 && DOCTOR_DEBUG */
if (strncasecmp(cp, "<string", 7)) {
*cp = ' ';
if (*(cp+1) != '-' || *(cp+2) != '-') {
f = 1;
}
}
} else if (*cp == '&') {
#if (DEBUG>5) && defined(DOCTOR_DEBUG)
int x = strncasecmp(cp, "©", 6);
printf("CHECK: %c%c%c%c%c%c == %d\n", *cp,
*(cp+1), *(cp+2), *(cp+3), *(cp+4),
*(cp+5), x);
#endif /* DEBUG>5 && DOCTOR_DEBUG */
if (strncasecmp(cp, "©", 6)) {
*cp = ' ';
g = 1;
}
} else if (f && (*cp == '>')) {
*cp = ' ';
f = 0;
} else if (g && (*cp == ';')) {
*cp = ' ';
g = 0;
} else if (isEOL(*cp)) {
g = 0;
}
/* Don't remove text in an HTML comment (e.g., turn the flag off) */
else if ((*cp == '!') &&
f &&
(cp != buf) &&
(*(cp-1) == ' ')) {
*cp = ' ';
f = 0;
} else if (f || g) {
// *cp = INVISIBLE; larry comment out this line, I do not think this logic is correct
} else if ((*cp == '<') || (*cp == '>')) {
*cp = ' ';
}
}
}
/*
* step 2: remove comments that start at the beginning of a line, * like
* ^dnl, ^xcomm, ^comment, and //
*/
cp = buf;
while (idxGrep(_UTIL_BOL_MAGIC, cp, REG_ICASE|REG_NEWLINE|REG_EXTENDED)) {
#ifdef DOCTOR_DEBUG
dumpMatch(cp, "Found \"comment\"-text");
#endif /* DOCTOR_DEBUG */
cp += cur.regm.rm_so;
switch (*cp) {
case '>':
*cp++ = ' ';
break;
case '@': /* texi special processing */
*cp++ = INVISIBLE;
if (strncasecmp(cp, "author", 6) == 0) {
(void) memset(cp, ' ', 6);
cp += 6;
} else if (strncasecmp(cp, "comment", 7) == 0) {
(void) memset(cp, ' ', 7);
cp += 7;
} else if (strncasecmp(cp, "center", 6) == 0) {
(void) memset(cp, ' ', 6);
cp += 6;
}
else if (strncasecmp(cp, "rem", 3) == 0) {
(void) memset(cp, ' ', 3);
cp += 3;
} else if (*cp == 'c') {
*cp++ = INVISIBLE;
if (strncasecmp(cp, " essay", 6) == 0) {
(void) memset(cp, ' ', 6);
cp += 6;
}
}
break;
case '/': /* c++ style comment // */
if(cp && cp[0])
{
/** when MODULE_LICENSE("GPL") is outcommented, do not get rid of this line. */
if (strstr(cp, MODULE_LICENSE) && '/' == cp[0])
{
(void) memset(cp, INVISIBLE, strlen(cp));
cp += strlen(cp);
}
else {
(void) memset(cp, INVISIBLE, 2);
cp += 2;
}
}
break;
case '\\': /* c++ style comment // */
if (strncasecmp(cp+1, "par ", 3) == 0) {
(void) memset(cp, ' ', 4);
}
cp += 4;
break;
case 'r':
case 'R': /* rem */
case 'd':
case 'D': /* dnl */
(void) memset(cp, INVISIBLE, 3);
cp += 3;
break;
case 'x':
case 'X': /* xcomm */
(void) memset(cp, INVISIBLE, 5);
cp += 5;
break;
case 'c':
case 'C': /* comment */
(void) memset(cp, INVISIBLE, 7);
cp += 7;
break;
case '%': /* %%copyright: */
(void) memset(cp, INVISIBLE, 12);
cp += 12;
break;
}
}
/*
* Step 3 - strip out crap at end-of-line on postscript documents
*/
if (isPS) {
#ifdef DOCTOR_DEBUG
printf("DEBUG: postscript stuff detected!\n");
#endif /* DOCTOR_DEBUG */
cp = buf;
while (idxGrep(_UTIL_POSTSCR, cp, REG_EXTENDED|REG_NEWLINE)) {
#ifdef DOCTOR_DEBUG
dumpMatch(cp, "FOUND postscript-thingy");
#endif /* DOCTOR_DEBUG */
x = cp + cur.regm.rm_so;
cp += cur.regm.rm_eo;
while (x < cp) {
*x++ = ' '/*INVISIBLE*/;
}
}
}
/*
* - step 4: remove groff/troff font-size indicators, the literal
* string backslash-n and all backslahes, ala:
*==> perl -pe 's,\\s[+-][0-9]*,,g;s,\\s[0-9]*,,g;s/\\n//g;' |
f*/
for (cp = buf; *cp; cp++) {
if (*cp == '\\') {
x = cp + 1;
if (*x && (*x == 's')) {
x++;
if (*x && ((*x == '+') || (*x == '-'))) {
x++;
}
while (*x && isdigit(*x)) {
x++;
}
} else if (*x && *x == 'n') {
x++;
}
memset(cp, /*INVISIBLE*/' ', (size_t) (x-cp));
}
}
/*
* - step 5: convert white-space to real spaces, and remove
* unnecessary punctuation, ala:
*==> tr -d '*=+#$|%.,:;!?()\\][\140\047\042' | tr '\011\012\015' ' '
*****
* NOTE: we purposely do NOT process backspace-characters here. Perhaps
* there's an improvement in the wings for this?
*/
for (cp = buf; /*cp < end &&*/ *cp; cp++) {
if ((*cp == '\302') && (*(cp+1) == '\251')) {
cp += 2;
continue;
}
if (*cp & (char) 0x80) {
*cp = INVISIBLE;
continue;
}
switch (*cp) {
/*
Convert eol-characters AND some other miscellaneous
characters into spaces (due to comment-styles, etc.)
*/
case '\a': case '\t': case '\n': case '\r':
case '\v': case '\f': case '[': case ']':
case '{': case '}': case '*': case '=':
case '#': case '$': case '|': case '%': case '!':
case '?': case '`': case '"': case '\'':
*cp = ' ';
break;
/* allow + only within the regex " [Mm]\+ " */
case '+':
if (*(cp+1) == 0 || *(cp+1) == ' ' || *(cp+1) == '\t' || *(cp+1) == '\n' || *(cp+1) == '\r') break;
else if (cp > buf+1 && (*(cp-1) == 'M' ||
*(cp-1) == 'm') && *(cp-2) == ' ' &&
*(cp+1) == ' ') {
f = 0; /* no-op */
}
else {
*cp = ' ';
}
break;
case '(':
if ((*(cp+1) == 'C' || *(cp+1) == 'c') &&
*(cp+2) == ')') {
cp += 2;
continue;
}
else {
*cp = ' ';
}
break;
case ')': case ',': case ':': case ';':
if (!isCR) {
*cp = ' ';
}
break;
case '.':
if (!isCR) {
*cp = INVISIBLE;
}
break;
case '<':
if (strncasecmp(cp, "<string", 7) == 0) {
(void) strncpy(cp, " ", 7);
}
break;
/* CDB - Big #ifdef 0 left out */
case '\001': case '\002': case '\003': case '\004':
case '\005': case '\006': case '\016': case '\017':
case '\020': case '\021': case '\022': case '\023':
case '\024': case '\025': case '\026': case '\027':
case '\030': case '\031': case '\032': case '\033':
case '\034': case '\035': case '\036': case '\037':
case '~':
*cp = INVISIBLE;
break;
#ifdef DOCTOR_DEBUG
case ' ': case '/': case '-': case '@': case '&':
case '>': case '^': case '_':
case INVISIBLE:
break;
default:
if (!isalpha(*cp) && !isdigit(*cp)) {
printf("DEBUG: \\0%o @ %ld\n",
*cp & 0xff, cp-buf);
}
break;
#endif /* DOCTOR_DEBUG */
}
}
/*
* Look for hyphenations of words, to compress both halves into a sin-
* gle (sic) word. Regex == "[a-z]- [a-z]".
*****
* NOTE: not sure this will work based on the way we strip punctuation
* out of the buffer above -- work on this later.