add autoconf magic to support old systems that don't support multibyte charsets

diff --git a/ChangeLog b/ChangeLog
index f634ba2..56fb2f5 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2006-01-18  Oliver Kiddle  <okiddle@yahoo.co.uk>
 
+       * configure.in, sbr/fmt_scan.c: add autoconf magic to support
+       old systems that don't support multibyte character sets
+
        * sbr/fmt_scan.c: fix bug with insertion of newline being wrong if
        the num function was used at the end of the format buffer
 

diff --git a/configure.in b/configure.in
index e52c5e6..525ba8c 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -448,9 +448,9 @@ AC_HEADER_SYS_WAIT
 AC_HEADER_STAT
 AC_CHECK_HEADERS(string.h memory.h stdlib.h unistd.h errno.h fcntl.h \
                  limits.h crypt.h termcap.h termio.h termios.h locale.h \
-                 langinfo.h netdb.h sys/param.h sys/time.h sys/utsname.h \
-                 iconv.h sys/stream.h arpa/inet.h arpa/ftp.h)
-
+                 langinfo.h wchar.h wctype.h iconv.h netdb.h \
+                 sys/param.h sys/time.h sys/utsname.h sys/stream.h \
+                 arpa/inet.h arpa/ftp.h)
 
 AC_CACHE_CHECK(POSIX termios, nmh_cv_sys_posix_termios,
 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
@@ -505,7 +505,7 @@ AC_FUNC_VFORK
 AC_CHECK_LIB(mkstemp,mkstemp)
 AC_CHECK_FUNCS(waitpid wait3 sigaction sigprocmask sigblock sigsetmask \
                sighold sigrelse writev lstat uname tzset killpg mkstemp \
-               sethostent getutent nl_langinfo)
+               sethostent getutent nl_langinfo mbtowc wcwidth)
 
 dnl solaris screws this up
 AC_CHECK_FUNC(gethostbyname, [AC_DEFINE(HAVE_GETHOSTBYNAME)],
@@ -539,6 +539,13 @@ dnl preprocessor to preprocess stdio.h and make sure that there's actually a
 dnl prototype. 
 AC_EGREP_HEADER(snprintf, stdio.h, AC_DEFINE(HAVE_SNPRINTF_PROTOTYPE))
 
+dnl Check for multibyte character set support
+if test "x$ac_cv_header_wchar_h" = "xyes" -a "x$ac_cv_header_wctype_h" = "xyes" \
+    -a "x$ac_cv_func_wcwidth" = "xyes" -a "x$ac_cv_func_mbtowc" = "xyes"; then
+  AC_DEFINE(MULTIBYTE_SUPPORT, 1,
+    [Define to enable support for multibyte character sets])
+fi
+
 dnl -------------------
 dnl CHECK FOR LIBRARIES
 dnl -------------------

diff --git a/sbr/fmt_scan.c b/sbr/fmt_scan.c
index b27f7c6..8475d50 100644 (file)
--- a/sbr/fmt_scan.c
+++ b/sbr/fmt_scan.c
@@ -25,7 +25,10 @@
 #  include <time.h>
 # endif
 #endif
-#include <wchar.h>
+#ifdef MULTIBYTE_SUPPORT
+#  include <wctype.h>
+#  include <wchar.h>
+#endif
 
 #define        NFMTS MAXARGS
 
@@ -127,8 +130,10 @@ cptrimmed(char **dest, char *str, unsigned int wid, char fill, size_t n) {
     int remaining;     /* remaining output width available */
     int c, ljust, w;
     int end;           /* number of input bytes remaining in str */
+#ifdef MULTIBYTE_SUPPORT
     int char_len;      /* bytes in current character */
     wchar_t wide_char;
+#endif
     char *sp;          /* current position in source string */
     char *cp = *dest;  /* current position in destination string */
     char *ep = cp + n; /* end of destination buffer */
@@ -144,6 +149,7 @@ cptrimmed(char **dest, char *str, unsigned int wid, char fill, size_t n) {
        mbtowc(NULL, NULL, 0); /* reset shift state */
        end = strlen(str);
        while (*sp && remaining > 0 && end > 0) {
+#ifdef MULTIBYTE_SUPPORT
            char_len = mbtowc(&wide_char, sp, end);
            if (char_len <= 0 || (cp + char_len > ep))
                break;
@@ -152,6 +158,11 @@ cptrimmed(char **dest, char *str, unsigned int wid, char fill, size_t n) {
 
            if (iswcntrl(wide_char) || iswspace(wide_char)) {
                sp += char_len;
+#else
+           end--;
+           if (iscntrl(*sp) || isspace(*sp)) {
+               sp++;
+#endif
                if (!prevCtrl) {
                    *cp++ = ' ';
                    remaining--;
@@ -162,6 +173,7 @@ cptrimmed(char **dest, char *str, unsigned int wid, char fill, size_t n) {
            }
            prevCtrl = 0;
 
+#ifdef MULTIBYTE_SUPPORT
            w = wcwidth(wide_char);
            if (w >= 0 && remaining >= w) {
                strncpy(cp, sp, char_len);
@@ -169,6 +181,10 @@ cptrimmed(char **dest, char *str, unsigned int wid, char fill, size_t n) {
                remaining -= w;
            }
            sp += char_len;
+#else
+           *cp++ = *sp++;
+           remaining--;
+#endif
        }
     }