add DB's overhaul of the paragraph searching code and some of the

justify code, as it makes some code much more understandable and fixes a
bug where searching for the previous paragraph would move the cursor too
high in one case


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@1873 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -52,6 +52,14 @@ CVS code -
 	- Convert placewewant to a size_t, and convert some functions
 	  that use it as a parameter to use size_t as well. (David
 	  Benbennick and DLR)
+	- Overhaul the paragraph searching code and some of the justify
+	  code to clarify it and fix a bug where searches from the
+	  previous paragraph would move up too far.  Also make
+	  quotestr-related variables global so that they only have to be
+	  compiled once, and remove the no-longer-needed IFREG() macro.
+	  New functions begpar() and inpar(); changes to quote_length(),
+	  quotes_match(), do_para_search(), do_para_begin(),
+	  do_para_end(), and do_justify(). (David Benbennick)
 - files.c:
   close_open_file()
 	- Tweak to no longer rely on the return values of
@@ -106,11 +114,13 @@ CVS code -
 - nano.h:
 	- Reassign the key for full justification to Ctrl-U, for
 	  compatibility with the current version of Pico. (DLR)
+	- Remove justbegend enum, as it's no longer needed. (DLR)
 - proto.h:
 	- Change the variables in the prototypes for do_justify(),
 	  get_verbatim_kbinput(), and get_mouseinput() to match the ones
 	  used in the actual functions. (DLR)
 	- Remove unused declaration of temp_opt. (David Benbennick)
+	- Add missing copy_file() prototype. (David Benbennick)
 - rcfile.c:
   rcfile_msg()
 	- Removed along with the related static int errors, and replaced

src/global.c

@@ -80,6 +80,13 @@ char *brackets = NULL;		/* Closing brackets that can follow
 				   sentences. */
 char *quotestr = NULL;		/* Quote string.  The default value is
 				   set in main(). */
+#ifdef HAVE_REGEX_H
+regex_t quotereg;		/* Compiled quotestr regular expression. */
+int quoterc;			/* Did it compile? */
+char *quoteerr = NULL;		/* The error message. */
+#else
+size_t quotelen;		/* strlen(quotestr) */
+#endif
 #endif
 
 #ifndef NANO_SMALL
@@ -1073,6 +1080,10 @@ void thanks_for_all_the_fish(void)
 #ifndef DISABLE_JUSTIFY
     if (quotestr != NULL)
 	free(quotestr);
+#ifdef HAVE_REGEX_H
+    regfree(&quotereg);
+    free(quoteerr);
+#endif
 #endif
 #ifndef NANO_SMALL
     if (backup_dir != NULL)

src/nano.c

@@ -1964,45 +1964,40 @@ void justify_format(filestruct *line, size_t skip)
  *
  * Note that if !HAVE_REGEX_H then we match concatenated copies of
  * quotestr. */
-#ifdef HAVE_REGEX_H
-size_t quote_length(const char *line, const regex_t *qreg)
-{
-    regmatch_t matches;
-    int rc = regexec(qreg, line, 1, &matches, 0);
-
-    if (rc == REG_NOMATCH || matches.rm_so == (regoff_t) -1)
-	return 0;
-    /* matches.rm_so should be 0, since the quote string should start with
-     * the caret ^. */
-    return matches.rm_eo;
-}
-#else	/* !HAVE_REGEX_H */
 size_t quote_length(const char *line)
 {
+#ifdef HAVE_REGEX_H
+    regmatch_t matches;
+    int rc = regexec(&quotereg, line, 1, &matches, 0);
+
+    if (rc == REG_NOMATCH || matches.rm_so == (regoff_t)-1)
+	return 0;
+    /* matches.rm_so should be 0, since the quote string should start
+     * with the caret ^. */
+    return matches.rm_eo;
+#else	/* !HAVE_REGEX_H */
     size_t qdepth = 0;
-    size_t qlen = strlen(quotestr);
 
     /* Compute quote depth level. */
     while (!strcmp(line + qdepth, quotestr))
-	qdepth += qlen;
+	qdepth += quotelen;
     return qdepth;
-}
 #endif	/* !HAVE_REGEX_H */
+}
 
 /* a_line and b_line are lines of text.  The quotation part of a_line is
  * the first a_quote characters.  Check that the quotation part of
  * b_line is the same. */
-int quotes_match(const char *a_line, size_t a_quote, IFREG(const char
+int quotes_match(const char *a_line, size_t a_quote, const char *b_line)
-	*b_line, const regex_t *qreg))
 {
     /* Here is the assumption about a_quote: */
-    assert(a_quote == quote_length(IFREG(a_line, qreg)));
+    assert(a_quote == quote_length(a_line));
-    return a_quote == quote_length(IFREG(b_line, qreg)) &&
+    return a_quote == quote_length(b_line) &&
 	!strncmp(a_line, b_line, a_quote);
 }
 
-/* We assume a_line and b_line have no quote part.  Then, we return whether
+/* We assume a_line and b_line have no quote part.  Then, we return
- * b_line could follow a_line in a paragraph. */
+ * whether b_line could follow a_line in a paragraph. */
 size_t indents_match(const char *a_line, size_t a_indent, const char
 	*b_line, size_t b_indent)
 {
@@ -2012,6 +2007,115 @@ size_t indents_match(const char *a_line, size_t a_indent, const char
     return b_indent <= a_indent && !strncmp(a_line, b_line, b_indent);
 }
 
+/* Is foo the beginning of a paragraph?
+ *
+ *   A line of text consists of a "quote part", followed by an
+ *   "indentation part", followed by text.  The functions quote_length()
+ *   and indent_length() calculate these parts.
+ *
+ *   A line is "part of a paragraph" if it has a part not in the quote
+ *   part or the indentation.
+ *
+ *   A line is "the beginning of a paragraph" if it is part of a
+ *   paragraph and
+ *	1) it is the top line of the file, or
+ *	2) the line above it is not part of a paragraph, or
+ *	3) the line above it does not have precisely the same quote
+ *	   part, or
+ *	4) the indentation of this line is not an initial substring of
+ *	   the indentation of the previous line, or
+ *	5) this line has no quote part and some indentation, and
+ *	   AUTOINDENT is not set.
+ *   The reason for number 5) is that if AUTOINDENT is not set, then an
+ *   indented line is expected to start a paragraph, like in books.
+ *   Thus, nano can justify an indented paragraph only if AUTOINDENT is
+ *   turned on. */
+bool begpar(const filestruct *const foo)
+{
+    size_t quote_len;
+    size_t indent_len;
+    size_t temp_id_len;
+
+    /* Case 1). */
+    if (foo->prev == NULL)
+	return TRUE;
+
+    quote_len = quote_length(foo->data);
+    indent_len = indent_length(foo->data + quote_len);
+
+    /* Not part of a paragraph. */
+    if (foo->data[quote_len + indent_len] == '\0')
+	return FALSE;
+
+    /* Case 3). */
+    if (!quotes_match(foo->data, quote_len, foo->prev->data))
+	return TRUE;
+
+    temp_id_len = indent_length(foo->prev->data + quote_len);
+
+    /* Case 2) or 5) or 4). */
+    if (foo->prev->data[quote_len + temp_id_len] == '\0' ||
+	(quote_len == 0 && indent_len > 0
+#ifndef NANO_SMALL
+	&& !ISSET(AUTOINDENT)
+#endif
+	) || !indents_match(foo->prev->data + quote_len, temp_id_len,
+	foo->data + quote_len, indent_len))
+	return TRUE;
+
+    return FALSE;
+}
+
+/* We find the last beginning-of-paragraph line before the current
+ * line. */
+void do_para_begin(void)
+{
+    const filestruct *old_current = current;
+    const size_t old_pww = placewewant;
+
+    current_x = 0;
+    placewewant = 0;
+
+    if (current->prev != NULL) {
+	do {
+	    current = current->prev;
+	} while (!begpar(current));
+    }
+
+    edit_redraw(old_current, old_pww);
+}
+
+bool inpar(const char *str)
+{
+    size_t quote_len = quote_length(str);
+
+    return str[quote_len + indent_length(str + quote_len)] != '\0';
+}
+
+/* A line is the last line of a paragraph if it is in a paragraph, and
+ * the next line isn't, or is the beginning of a paragraph.  We move
+ * down to the end of a paragraph, then one line farther. */
+void do_para_end(void)
+{
+    const filestruct *const old_current = current;
+    const size_t old_pww = placewewant;
+
+    current_x = 0;
+    placewewant = 0;
+
+    while (current->next != NULL && !inpar(current->data))
+	current = current->next;
+
+    while (current->next != NULL && inpar(current->next->data) &&
+	    !begpar(current->next))
+	current = current->next;
+
+    if (current->next != NULL)
+	current = current->next;
+
+    edit_redraw(old_current, old_pww);
+}
+
 /* Put the next par_len lines, starting with first_line, in the cut
  * buffer, not allowing them to be concatenated.  We assume there are
  * enough lines after first_line.  We leave copies of the lines in
@@ -2066,14 +2170,14 @@ int breakable(const char *line, int goal)
 }
 
 /* We are trying to break a chunk off line.  We find the last space such
- * that the display length to there is at most goal + 1.  If there is
+ * that the display length to there is at most goal + 1.  If there is no
- * no such space, and force is not 0, then we find the first space.
+ * such space, and force is not 0, then we find the first space.
  * Anyway, we then take the last space in that group of spaces.  The
  * terminating '\0' counts as a space. */
 int break_line(const char *line, int goal, int force)
 {
-    /* Note that we use int instead of size_t, since goal is at most COLS,
+    /* Note that we use int instead of size_t, since goal is at most
-     * the screen width, which will always be reasonably small. */
+     * COLS, the screen width, which will always be reasonably small. */
     int space_loc = -1;
 	/* Current tentative return value.  Index of the last space we
 	 * found with short enough display width.  */
@@ -2110,50 +2214,16 @@ int break_line(const char *line, int goal, int force)
     return space_loc;
 }
 
-/* Search a paragraph.  If search_type is JUSTIFY, search for the
+/* Find the beginning of the current paragraph if we're in one, or the
- * beginning of the current paragraph or, if we're at the end of it, the
+ * beginning of the next paragraph if we're not.  Afterwards, save the
- * beginning of the next paragraph.  If search_type is BEGIN, search for
+ * quote length and paragraph length in *quote and *par.  Return FALSE
- * the beginning of the current paragraph or, if we're already there,
+ * if we found a paragraph, or TRUE if there was an error or we didn't
- * the beginning of the previous paragraph.  If search_type is END,
+ * find a paragraph.
- * search for the end of the current paragraph or, if we're already
- * there, the end of the next paragraph.  Afterwards, save the quote
- * length, paragraph length, and indentation length in *quote, *par, and
- * *indent if they aren't NULL, and refresh the screen if do_refresh is
- * TRUE.  Return 0 if we found a paragraph, or 1 if there was an error
- * or we didn't find a paragraph.
  *
- * To explain the searching algorithm, I first need to define some
+ * See the comment at begpar() for more about when a line is the
- * phrases about paragraphs and quotation:
+ * beginning of a paragraph. */
- *   A line of text consists of a "quote part", followed by an
+bool do_para_search(size_t *const quote, size_t *const par)
- *   "indentation part", followed by text.  The functions quote_length()
- *   and indent_length() calculate these parts.
- *
- *   A line is "part of a paragraph" if it has a part not in the quote
- *   part or the indentation.
- *
- *   A line is "the beginning of a paragraph" if it is part of a
- *   paragraph and
- *	1) it is the top line of the file, or
- *	2) the line above it is not part of a paragraph, or
- *	3) the line above it does not have precisely the same quote
- *	   part, or
- *	4) the indentation of this line is not an initial substring of
- *	   the indentation of the previous line, or
- *	5) this line has no quote part and some indentation, and
- *	   AUTOINDENT is not set.
- *   The reason for number 5) is that if AUTOINDENT is not set, then an
- *   indented line is expected to start a paragraph, like in books.
- *   Thus, nano can justify an indented paragraph only if AUTOINDENT is
- *   turned on.
- *
- *   A contiguous set of lines is a "paragraph" if each line is part of
- *   a paragraph and only the first line is the beginning of a
- *   paragraph. */
-int do_para_search(justbegend search_type, size_t *quote, size_t *par,
-	size_t *indent, int do_refresh)
 {
-    size_t old_pww = placewewant;
-    const filestruct *current_save = current;
     size_t quote_len;
 	/* Length of the initial quotation of the paragraph we
 	 * search. */
@@ -2165,18 +2235,9 @@ int do_para_search(justbegend search_type, size_t *quote, size_t *par,
 	/* Generic line of text. */
 
 #ifdef HAVE_REGEX_H
-    regex_t qreg;	/* qreg is the compiled quotation regexp.  We no
+    if (quoterc != 0) {
-			 * longer care about quotestr. */
+	statusbar(_("Bad quote string %s: %s"), quotestr, quoteerr);
-    int rc = regcomp(&qreg, quotestr, REG_EXTENDED);
+	return TRUE;
-
-    if (rc != 0) {
-	size_t size = regerror(rc, &qreg, NULL, 0);
-	char *strerror = charalloc(size);
-
-	regerror(rc, &qreg, strerror, size);
-	statusbar(_("Bad quote string %s: %s"), quotestr, strerror);
-	free(strerror);
-	return 1;
     }
 #endif
 
@@ -2185,20 +2246,19 @@ int do_para_search(justbegend search_type, size_t *quote, size_t *par,
 
     current_x = 0;
 
-    quote_len = quote_length(IFREG(current->data, &qreg));
+    quote_len = quote_length(current->data);
     indent_len = indent_length(current->data + quote_len);
 
-    /* Here we find the last or first line of the paragraph to search.
+    /* Here we find the first line of the paragraph to search.  If the
-     * If the current line is in a paragraph, then we move back to the
+     * current line is in a paragraph, then we move back to the first
-     * first line of the paragraph.  Otherwise, we move to the last or
+     * line of the paragraph.  Otherwise, we move to the first line that
-     * first line that is in a paragraph. */
+     * is in a paragraph. */
-  start_para_search:
     if (current->data[quote_len + indent_len] != '\0') {
 	/* This line is part of a paragraph.  So we must search back to
 	 * the first line of this paragraph.  First we check items 1)
 	 * and 3) above. */
-	while (current->prev != NULL && quotes_match(current->data,
+	while (current->prev != NULL &&	quotes_match(current->data,
-			quote_len, IFREG(current->prev->data, &qreg))) {
+		quote_len, current->prev->data)) {
 	    size_t temp_id_len =
 			indent_length(current->prev->data + quote_len);
 		/* The indentation length of the previous line. */
@@ -2217,37 +2277,6 @@ int do_para_search(justbegend search_type, size_t *quote, size_t *par,
 	    current = current->prev;
 	    current_y--;
 	}
-
-	/* If we're searching for the beginning of the paragraph, 
-	 * we're not on the first line of the file, and we're on the 
-	 * same line we started on, move up one line and search
-	 * again, so that we end up on the first line of the previous
-	 * paragraph. */
-	if (search_type == BEGIN && current->prev != NULL &&
-	    current == current_save) {
-	    current = current->prev;
-	    current_y--;
-	    goto start_para_search;
-	}
-    } else if (search_type == BEGIN) {
-	/* This line is not part of a paragraph.  Move up until we get
-	 * to a non "blank" line. */
-	do {
-	    /* There is no previous paragraph, so nothing to move to. */
-	    if (current->prev == NULL) {
-		placewewant = 0;
-		if (do_refresh)
-		    edit_redraw(current_save, old_pww);
-#ifdef HAVE_REGEX_H
-		regfree(&qreg);
-#endif
-		return 1;
-	    }
-	    current = current->prev;
-	    current_y--;
-	    quote_len = quote_length(IFREG(current->data, &qreg));
-	    indent_len = indent_length(current->data + quote_len);
-	} while (current->data[quote_len + indent_len] == '\0');
     } else {
 	/* This line is not part of a paragraph.  Move down until we get
 	 * to a non "blank" line. */
@@ -2255,23 +2284,17 @@ int do_para_search(justbegend search_type, size_t *quote, size_t *par,
 	    /* There is no next paragraph, so nothing to move to. */
 	    if (current->next == NULL) {
 		placewewant = 0;
-		if (do_refresh)
+		return TRUE;
-		    edit_redraw(current_save, old_pww);
-#ifdef HAVE_REGEX_H
-		regfree(&qreg);
-#endif
-		return 1;
 	    }
 	    current = current->next;
 	    current_y++;
-	    quote_len = quote_length(IFREG(current->data, &qreg));
+	    quote_len = quote_length(current->data);
 	    indent_len = indent_length(current->data + quote_len);
 	} while (current->data[quote_len + indent_len] == '\0');
     }
 
-    /* Now current is the last line in the paragraph if we're searching
+    /* Now current is the first line of the paragraph, and quote_len is
-     * for the beginning of it or the first line of the paragraph
+     * the quotation length of that line. */
-     * otherwise, and quote_len is the quotation length of that line. */
 
     /* Next step, compute par_len, the number of lines in this
      * paragraph. */
@@ -2279,32 +2302,11 @@ int do_para_search(justbegend search_type, size_t *quote, size_t *par,
     par_len = 1;
     indent_len = indent_length(line->data + quote_len);
 
-    if (search_type == BEGIN) {
+    while (line->next != NULL &&
-	while (line->prev != NULL && quotes_match(current->data,
+	    quotes_match(current->data, quote_len, line->next->data)) {
-		quote_len, IFREG(line->prev->data, &qreg))) {
+	size_t temp_id_len = indent_length(line->next->data + quote_len);
-	    size_t temp_id_len = indent_length(line->prev->data +
-		quote_len);
 
-	    if (!indents_match(line->data + quote_len, indent_len,
+	if (!indents_match(line->data + quote_len, indent_len,
-		line->prev->data + quote_len, temp_id_len) ||
-		line->prev->data[quote_len + temp_id_len] == '\0' ||
-		(quote_len == 0 && temp_id_len > 0
-#ifndef NANO_SMALL
-		&& !ISSET(AUTOINDENT)
-#endif
-		))
-		break;
-	    indent_len = temp_id_len;
-	    line = line->prev;
-	    par_len++;
-	}
-    } else {
-	while (line->next != NULL && quotes_match(current->data,
-		quote_len, IFREG(line->next->data, &qreg))) {
-	    size_t temp_id_len = indent_length(line->next->data +
-		quote_len);
-
-	    if (!indents_match(line->data + quote_len, indent_len,
 		line->next->data + quote_len, temp_id_len) ||
 		line->next->data[quote_len + temp_id_len] == '\0' ||
 		(quote_len == 0 && temp_id_len > 0
@@ -2312,70 +2314,27 @@ int do_para_search(justbegend search_type, size_t *quote, size_t *par,
 		&& !ISSET(AUTOINDENT)
 #endif
 		))
-		break;
+	    break;
-	    indent_len = temp_id_len;
+	indent_len = temp_id_len;
-	    line = line->next;
+	line = line->next;
-	    par_len++;
+	par_len++;
-	}
     }
 
-#ifdef HAVE_REGEX_H
-    /* We no longer need to check quotation. */
-    regfree(&qreg);
-#endif
-
     /* Now par_len is the number of lines in this paragraph.  We should
      * never call quotes_match() or quote_length() again. */
 
-    /* If we're searching for the beginning of the paragraph, move up
+    /* Save the values of quote_len and par_len. */
-     * the number of lines in the paragraph minus one, since we want to
+    assert(quote != NULL && par != NULL);
-     * end up on the first line of the paragraph.  If we're searching
+    *quote = quote_len;
-     * for the end of the paragraph, move down the number of lines in
+    *par = par_len;
-     * the paragraph, since we want to end up on the line after the 
-     * last line of the paragraph. */
-    if (search_type == BEGIN) {
-	for (; par_len > 1; current_y--, par_len--)
-	    current = current->prev;
-    } else if (search_type == END) {
-	for (; par_len > 0; current_y++, par_len--)
-	    current = current->next;
-    }
 
-    /* Refresh the screen if needed. */
+    return FALSE;
-    if (do_refresh)
-	edit_redraw(current_save, old_pww);
-
-    /* Save the values of quote_len, par_len, and indent_len if
-     * needed. */
-    if (quote != NULL)
-	*quote = quote_len;
-    if (par != NULL)
-	*par = par_len;
-    if (indent != NULL)
-	*indent = indent_len;
-
-    return 0;
-}
-
-void do_para_begin(void)
-{
-    do_para_search(BEGIN, NULL, NULL, NULL, TRUE);
-}
-
-void do_para_end(void)
-{
-    do_para_search(END, NULL, NULL, NULL, TRUE);
 }
 
 /* If full_justify is TRUE, justify the entire file.  Otherwise, justify
  * the current paragraph. */
 void do_justify(int full_justify)
 {
-    size_t quote_len;
-	/* Length of the initial quotation of the paragraph we
-	 * justify. */
-    size_t par_len;
-	/* Number of lines in that paragraph. */
     filestruct *first_par_line = NULL;
 	/* Will be the first line of the resulting justified paragraph.
 	 * For restoring after uncut. */
@@ -2385,7 +2344,7 @@ void do_justify(int full_justify)
 	/* When the paragraph gets modified, all lines from the changed
 	 * one down are stored in the cutbuffer.  We back up the
 	 * original to restore it later. */
-    int allow_respacing;
+    bool allow_respacing;
 	/* Whether we should change the spacing at the end of a line
 	 * after justifying it.  This should be TRUE whenever we move
 	 * to the next line after justifying the current line. */
@@ -2405,8 +2364,6 @@ void do_justify(int full_justify)
     int kbinput;
     int meta_key;
 
-    size_t indent_len;	/* Generic indentation length. */
-
     /* If we're justifying the entire file, start at the beginning. */
     if (full_justify)
 	current = fileage;
@@ -2414,18 +2371,23 @@ void do_justify(int full_justify)
     last_par_line = current;
 
     while (TRUE) {
-	/* First, search for the beginning of the current paragraph or,
+	size_t quote_len;
-	 * if we're at the end of it, the beginning of the next
+	    /* Length of the initial quotation of the paragraph we
-	 * paragraph.  Save the quote length, paragraph length, and
+	     * justify. */
-	 * indentation length and don't refresh the screen yet (since
+	size_t par_len;
-	 * we'll do that after we justify).  If the search failed and
+	    /* Number of lines in that paragraph. */
-	 * we're justifying the whole file, move the last line of the
+
-	 * text we're justifying to just before the magicline, which is
+	/* Find the first line of the paragraph to be justified.  That
-	 * where it'll be anyway if we've searched the entire file, and
+	 * is the start of this paragraph if we're in one, or the start
-	 * break out of the loop; otherwise, refresh the screen and get
+	 * of the next otherwise.  Save the quote length and paragraph
-	 * out. */
+	 * length (number of lines).  Don't refresh the screen yet
-	if (do_para_search(JUSTIFY, &quote_len, &par_len, &indent_len,
+	 * (since we'll do that after we justify).  If the search failed
-		FALSE) != 0) {
+	 * and we're justifying the whole file, move the last line of
+	 * the text we're justifying to just before the magicline, which
+	 * is where it'll be anyway if we've searched the entire file,
+	 * and break out of the loop; otherwise, refresh the screen and
+	 * get out. */
+	if (do_para_search(&quote_len, &par_len)) {
 	    if (full_justify) {
 		/* This should be safe in the event of filebot->prev's
 		 * being NULL, since only last_par_line->next is used if
@@ -2441,6 +2403,7 @@ void do_justify(int full_justify)
 	/* Next step, we loop through the lines of this paragraph,
 	 * justifying each one individually. */
 	for (; par_len > 0; current_y++, par_len--) {
+	    size_t indent_len;	/* Generic indentation length. */
 	    size_t line_len;
 	    size_t display_len;
 		/* The width of current in screen columns. */
@@ -2662,9 +2625,9 @@ void do_justify(int full_justify)
     kbinput = get_kbinput(edit, &meta_key);
 
 #ifndef DISABLE_MOUSE
-    /* If it was a mouse click, parse it with do_mouse() and it
+    /* If it was a mouse click, parse it with do_mouse() and it might
-     * might become the unjustify key.  Else give it back to the
+     * become the unjustify key.  Else give it back to the input
-     * input stream. */
+     * stream. */
     if (kbinput == KEY_MOUSE) {
 	do_mouse();
 	kbinput = get_kbinput(edit, &meta_key);
@@ -3411,6 +3374,22 @@ int main(int argc, char *argv[])
 		"> "
 #endif
 		);
+#ifdef HAVE_REGEX_H
+    quoterc = regcomp(&quotereg, quotestr, REG_EXTENDED);
+
+    if (quoterc == 0) {
+	/* We no longer need quotestr, just quotereg. */
+	free(quotestr);
+	quotestr = NULL;
+    } else {
+	size_t size = regerror(quoterc, &quotereg, NULL, 0);
+
+	quoteerr = charalloc(size);
+	regerror(quoterc, &quotereg, quoteerr, size);
+    }
+#else
+    quotelen = strlen(quotestr);
+#endif /* !HAVE_REGEX_H */
 #endif /* !DISABLE_JUSTIFY */
 
 #ifndef DISABLE_SPELLER

src/nano.h

@@ -465,10 +465,6 @@ typedef struct historyheadtype {
 #define VIEW TRUE
 #define NOVIEW FALSE
 
-typedef enum {
-    JUSTIFY, BEGIN, END
-} justbegend;
-
 typedef enum {
     UP, DOWN
 } updown;

src/proto.h

@@ -51,6 +51,13 @@ extern char *whitespace;
 extern char *punct;
 extern char *brackets;
 extern char *quotestr;
+#ifdef HAVE_REGEX_H
+extern regex_t quotereg;
+extern int quoterc;
+extern char *quoteerr;
+#else
+extern size_t quotelen;
+#endif
 #endif
 
 #ifndef NANO_SMALL
@@ -191,6 +198,7 @@ int check_operating_dir(const char *currpath, int allow_tabcomp);
 #ifndef NANO_SMALL
 void init_backup_dir(void);
 #endif
+int copy_file(FILE *inn, FILE *out);
 int write_file(const char *name, int tmp, int append, int nonamechange);
 #ifndef NANO_SMALL
 int write_marked(const char *name, int tmp, int append);
@@ -314,28 +322,19 @@ size_t indent_length(const char *line);
 #endif
 #ifndef DISABLE_JUSTIFY
 void justify_format(filestruct *line, size_t skip);
-#ifdef HAVE_REGEX_H
-size_t quote_length(const char *line, const regex_t *qreg);
-#else
 size_t quote_length(const char *line);
-#endif
+int quotes_match(const char *a_line, size_t a_quote, const char *b_line);
-#ifdef HAVE_REGEX_H
-#  define IFREG(a, b) a, b
-#else
-#  define IFREG(a, b) a
-#endif
-int quotes_match(const char *a_line, size_t a_quote, IFREG(const char
-	*b_line, const regex_t *qreg));
 size_t indents_match(const char *a_line, size_t a_indent, const char
 	*b_line, size_t b_indent);
+bool begpar(const filestruct *const foo);
+void do_para_begin(void);
+bool inpar(const char *str);
+void do_para_end(void);
 filestruct *backup_lines(filestruct *first_line, size_t par_len, size_t
 	quote_len);
 int breakable(const char *line, int goal);
 int break_line(const char *line, int goal, int force);
-int do_para_search(justbegend search_type, size_t *quote, size_t *par,
+bool do_para_search(size_t *const quote, size_t *const par);
-	size_t *indent, int do_refresh);
-void do_para_begin(void);
-void do_para_end(void);
 void do_justify(int full_justify);
 void do_justify_void(void);
 void do_full_justify(void);