add isblank() equivalent and use it instead of checking for (tab or

space) all over the code, properly detect whether we have strcasestr()
and only use nstristr() if we don't, and bump up CVS build requirements
to account for setting _GNU_SOURCE when running the test programs for
both


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@1730 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -79,6 +79,9 @@ CVS code -
 	  display_string() that have been used in the search prompt
 	  since 1.3.0. (David Benbennick)
 - utils.c:
+  is_blank_char()
+	- Add new function is_blank_char() as an isblank() equivalent,
+	  since isblank() is a GNU extension. (DLR)
   nstricmp(), nstrnicmp()
 	- Add extra blank lines for greater readability, and remove
 	  unneeded test for n's being less than zero (since it's already
@@ -88,6 +91,8 @@ CVS code -
 	- Rename to nstristr() to avoid a potential conflict with an
 	  existing stristr() function, and move up to just after
 	  nstrnicmp(). (DLR)  David Benbennick: Tweak for efficiency.
+	- Include and use only when strcasestr() is unavailable, since
+	  strcasestr() is a GNU extension. (DLR)
 - winio.c:
   get_verbatim_kbinput()
 	- Refactor the output in the DEBUG #ifdef.  It didn't work
@@ -120,6 +125,10 @@ CVS code -
 	- Use napms() instead of nanosleep(), as it does the same thing
 	  (aside from taking an argument in milliseconds instead of
 	  microseconds) and curses includes it. (DLR)
+- configure.ac:
+	- Add tests for isblank() and strcasestr(), and define
+	  _GNU_SOURCE so that the tests work properly.  Increase the
+	  minimum required autoconf version to 2.54. (DLR)
 - faq.html:
 	- Removed question about the NumLock glitch, as it's no longer
 	  needed. (DLR)
@@ -137,6 +146,13 @@ CVS code -
 - nanorc.sample:
 	- Add missing mouse entry, and update the nanorc sample regexes
 	  to account for the backupdir and mouse options. (DLR)
+- README.CVS:
+	- Increase the minimum required autoconf version to 2.54, and
+	  change the recommended automake version 1.7 to the minimum
+	  required automake version.  Note that autoconf 2.54 will
+	  technically also work with automake 1.6c, but that is a CVS
+	  version as opposed to a stable release version, and automake
+	  1.7 requires at least autoconf 2.54 in any case. (DLR)
 
 GNU nano 1.3.2 - 2004.03.31
 - General:

README.CVS

@@ -7,8 +7,8 @@ more care than the official stable and unstable tarballs.
 To successfully compile GNU nano from CVS, you'll need the
 following packages:
 
-- autoconf (version >= 2.52)
+- autoconf (version >= 2.54)
-- automake (version >= 1.6, 1.7.x recommended)
+- automake (version >= 1.7)
 - gettext (version >= 0.11.5)
 - texinfo
 - cvs

configure.ac

@@ -24,9 +24,10 @@ AC_CONFIG_SRCDIR([src/nano.c])
 AM_INIT_AUTOMAKE
 AM_CONFIG_HEADER([config.h:config.h.in])
 
-AC_PREREQ(2.52)
+AC_PREREQ(2.54)
 
 dnl Checks for programs.
+AC_GNU_SOURCE
 AC_PROG_CC
 AC_ISC_POSIX
 AC_SYS_LARGEFILE
@@ -270,7 +271,7 @@ AC_MSG_WARN([*** Can not use slang when cross-compiling])),
     esac], [AC_MSG_RESULT(no)])
 
 dnl Checks for functions
-AC_CHECK_FUNCS(snprintf vsnprintf strcasecmp strncasecmp)
+AC_CHECK_FUNCS(snprintf vsnprintf isblank strcasecmp strncasecmp strcasestr)
 if test "x$ac_cv_func_snprintf" = "xno" -o "xac_cv_func_vsnprintf" = "xno"
 then
 	AM_PATH_GLIB_2_0(2.0.0,,

src/files.c

@@ -189,7 +189,7 @@ int read_file(FILE *f, const char *filename, int quiet)
 	   assume it's a DOS or Mac formatted file if it hasn't been
 	   detected as one already! */
 	if (fileformat == 0 && !ISSET(NO_CONVERT)
-		&& is_cntrl_char((int)input) != 0 && input != '\t'
+		&& is_cntrl_char(input) && input != '\t'
 		&& input != '\r' && input != '\n')
 	    SET(NO_CONVERT);
 #endif
@@ -2230,7 +2230,7 @@ char *input_tab(char *buf, int place, int *lastwastab, int *newplace, int *list)
 	tmp = matchbuf;
 
 	/* skip any leading white space */
-	while (*tmp && isspace((int)*tmp))
+	while (*tmp && isblank(*tmp))
 	    ++tmp;
 
 	/* Free up any memory already allocated */

src/nano.c

@@ -1106,7 +1106,7 @@ int do_enter(void)
 	int extra = 0;
 	const char *spc = current->data;
 
-	while (*spc == ' ' || *spc == '\t') {
+	while (isblank(*spc)) {
 	    extra++;
 	    spc++;
 	}
@@ -1312,14 +1312,14 @@ int do_wrap(filestruct *inptr)
     wrap_line = inptr->data + i;
     for (; i < len; i++, wrap_line++) {
 	/* record where the last word ended */
-	if (*wrap_line != ' ' && *wrap_line != '\t')
+	if (!isblank(*wrap_line))
 	    word_back = i;
 	/* if we have found a "legal wrap point" and the current word
 	 * extends too far, then we stop */
 	if (wrap_loc != -1 && strnlenpt(inptr->data, word_back + 1) > fill)
 	    break;
 	/* we record the latest "legal wrap point" */
-	if (word_back != i && wrap_line[1] != ' ' && wrap_line[1] != '\t')
+	if (word_back != i && !isblank(wrap_line[1]))
 	    wrap_loc = i;
     }
     if (wrap_loc < 0 || i == len)
@@ -1387,7 +1387,7 @@ int do_wrap(filestruct *inptr)
 	 * between after_break and wrap_line.  If the line already ends
 	 * in a tab or a space, we don't add a space and decrement
 	 * totsize to account for that. */
-	if (!isspace((int) newline[strlen(newline) - 1]))
+	if (!isblank(newline[strlen(newline) - 1]))
 	    strcat(newline, " ");
 	else
 	    totsize--;
@@ -1885,7 +1885,7 @@ size_t indent_length(const char *line)
     size_t len = 0;
 
     assert(line != NULL);
-    while (*line == ' ' || *line == '\t') {
+    while (isblank(*line)) {
 	line++;
 	len++;
     }
@@ -1917,7 +1917,7 @@ int justify_format(int changes_allowed, filestruct *line, size_t skip)
     assert(line != NULL);
     assert(line->data != NULL);
     assert(skip < strlen(line->data));
-    assert(line->data[skip] != ' ' && line->data[skip] != '\t');
+    assert(!isblank(line->data[skip]));
 
     back = line->data + skip;
     front = back;
@@ -2078,7 +2078,7 @@ filestruct *backup_lines(filestruct *first_line, size_t par_len,
 int breakable(const char *line, int goal)
 {
     for (; *line != '\0' && goal >= 0; line++) {
-	if (*line == ' ' || *line == '\t')
+	if (isblank(*line))
 	    return TRUE;
 
 	if (is_cntrl_char(*line) != 0)
@@ -2334,7 +2334,7 @@ int do_para_search(int search_type, size_t *quote, size_t *par, size_t
 		 * characters, as searching for the end of the paragraph
 		 * does. */
 		for (i = 0; current->data[i] != '\0'; i++) {
-		    if (isspace(current->data[i]))
+		    if (isblank(current->data[i]))
 			j++;
 		    else {
 			i = 0;

src/nano.h

@@ -91,7 +91,12 @@
 # endif
 #endif
 
-/* If no strcasecmp() or strncasecmp(), use the versions we have. */
+/* If no isblank(), strcasecmp(), strncasecmp(), or strcasestr(), use
+ * the versions we have. */
+#ifndef HAVE_ISBLANK
+#define isblank is_blank_char
+#endif
+
 #ifndef HAVE_STRCASECMP
 #define strcasecmp nstricmp
 #endif
@@ -100,6 +105,10 @@
 #define strncasecmp nstrnicmp
 #endif
 
+#ifndef HAVE_STRCASESTR
+#define strcasestr nstristr
+#endif
+
 /* Assume ERR is defined as -1.  To avoid duplicate case values when
  * some key definitions are missing, we have to set all of these, and
  * all of the special sentinel values below, to different negative

src/proto.h

@@ -413,6 +413,9 @@ int regexec_safe(const regex_t *preg, const char *string, size_t nmatch,
 #endif
 int regexp_bol_or_eol(const regex_t *preg, const char *string);
 #endif
+#ifndef HAVE_ISBLANK
+int is_blank_char(int c);
+#endif
 int is_cntrl_char(int c);
 int num_of_digits(int n);
 void align(char **strp);

src/rcfile.c

@@ -31,6 +31,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <pwd.h>
+#include <ctype.h>
 #include <assert.h>
 #include "proto.h"
 #include "nano.h"
@@ -131,7 +132,7 @@ void rcfile_msg(const char *msg, ...)
 /* Parse the next word from the string.  Returns NULL if we hit EOL. */
 char *parse_next_word(char *ptr)
 {
-    while (*ptr != ' ' && *ptr != '\t' && *ptr != '\n' && *ptr != '\0')
+    while (!isblank(*ptr) && *ptr != '\n' && *ptr != '\0')
 	ptr++;
 
     if (*ptr == '\0')
@@ -140,7 +141,7 @@ char *parse_next_word(char *ptr)
     /* Null terminate and advance ptr */
     *ptr++ = 0;
 
-    while (*ptr == ' ' || *ptr == '\t')
+    while (isblank(*ptr))
 	ptr++;
 
     return ptr;
@@ -179,7 +180,7 @@ char *parse_argument(char *ptr)
 	ptr = last_quote + 1;
     }
     if (ptr != NULL)
-	while (*ptr == ' ' || *ptr == '\t')
+	while (isblank(*ptr))
 	    ptr++;
     return ptr;
 }
@@ -237,7 +238,7 @@ char *parse_next_regex(char *ptr)
     /* Null terminate and advance ptr. */
     *ptr++ = '\0';
 
-    while (*ptr == ' ' || *ptr == '\t')
+    while (isblank(*ptr))
 	ptr++;
 
     return ptr;
@@ -484,7 +485,7 @@ void parse_rcfile(FILE *rcstream)
     while (fgets(buf, 1023, rcstream) != 0) {
 	lineno++;
 	ptr = buf;
-	while (*ptr == ' ' || *ptr == '\t')
+	while (isblank(*ptr))
 	    ptr++;
 
 	if (*ptr == '\n' || *ptr == '\0')

src/utils.c

@@ -52,6 +52,16 @@ int regexp_bol_or_eol(const regex_t *preg, const char *string)
 }
 #endif /* HAVE_REGEX_H */
 
+#ifndef HAVE_ISBLANK
+/* This function is equivalent to isblank(). */
+int is_blank_char(int c)
+{
+    return (c == '\t' || c == ' ');
+}
+#endif
+
+/* This function is equivalent to iscntrl(), except in that it also
+ * handles control characters with their high bits set. */
 int is_cntrl_char(int c)
 {
     return (-128 <= c && c < -96) || (0 <= c && c < 32) ||
@@ -146,6 +156,7 @@ int nstrnicmp(const char *s1, const char *s2, size_t n)
 }
 #endif
 
+#ifndef HAVE_STRCASESTR
 /* This function is equivalent to strcasestr().  It was adapted from
  * mutt's mutt_stristr() function. */
 const char *nstristr(const char *haystack, const char *needle)
@@ -165,6 +176,7 @@ const char *nstristr(const char *haystack, const char *needle)
 
     return NULL;
 }
+#endif
 
 /* None of this is needed if we're using NANO_SMALL! */
 #ifndef NANO_SMALL
@@ -256,7 +268,7 @@ const char *strstrwrapper(const char *haystack, const char *needle,
     else if (ISSET(REVERSE_SEARCH))
 	return revstristr(haystack, needle, start);
 #endif
-    return nstristr(start, needle);
+    return strcasestr(start, needle);
 }
 
 /* This is a wrapper for the perror() function.  The wrapper takes care