3 * Copyright 2002-2003 The OpenLDAP Foundation, All Rights Reserved.
4 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
10 #include <ac/stdarg.h>
11 #include <ac/string.h>
15 #if !defined(HAVE_VSNPRINTF) && !defined(HAVE_EBCDIC)
16 /* Write at most n characters to the buffer in str, return the
17 * number of chars written or -1 if the buffer would have been
20 * This is portable to any POSIX-compliant system. We use pipe()
21 * to create a valid file descriptor, and then fdopen() it to get
22 * a valid FILE pointer. The user's buffer and size are assigned
23 * to the FILE pointer using setvbuf. Then we close the read side
24 * of the pipe to invalidate the descriptor.
26 * If the write arguments all fit into size n, the write will
27 * return successfully. If the write is too large, the stdio
28 * buffer will need to be flushed to the underlying file descriptor.
29 * The flush will fail because it is attempting to write to a
30 * broken pipe, and the write will be terminated.
33 /* This emulation uses vfprintf; on OS/390 we're also emulating
34 * that function so it's more efficient just to have a separate
35 * version of vsnprintf there.
37 #include <ac/signal.h>
38 int ber_pvt_vsnprintf( char *str, size_t n, const char *fmt, va_list ap )
44 if (pipe( fds )) return -1;
46 f = fdopen( fds[1], "w" );
52 setvbuf( f, str, _IOFBF, n );
53 sig = signal( SIGPIPE, SIG_IGN );
56 res = vfprintf( f, fmt, ap );
59 signal( SIGPIPE, sig );
60 if ( res > 0 && res < n ) {
61 res = vsprintf( str, fmt, ap );
68 int ber_pvt_snprintf( char *str, size_t n, const char *fmt, ... )
74 res = vsnprintf( str, n, fmt, ap );
78 #endif /* !HAVE_VSNPRINTF */
81 /* stdio replacements with ASCII/EBCDIC translation for OS/390.
82 * The OS/390 port depends on the CONVLIT compiler option being
83 * used to force character and string literals to be compiled in
84 * ISO8859-1, and the __LIBASCII cpp symbol to be defined to use the
85 * OS/390 ASCII-compatibility library. This library only supplies
86 * an ASCII version of sprintf, so other needed functions are
89 * All of the internal character manipulation is done in ASCII,
90 * but file I/O is EBCDIC, so we catch any stdio reading/writing
91 * of files here and do the translations.
97 char *ber_pvt_fgets( char *s, int n, FILE *fp )
99 s = (char *)fgets( s, n, fp );
100 if ( s ) __etoa( s );
104 int ber_pvt_fputs( const char *str, FILE *fp )
108 strncpy( buf, str, sizeof(buf) );
110 return fputs( buf, fp );
113 /* The __LIBASCII doesn't include a working vsprintf, so we make do
114 * using just sprintf. This is a very simplistic parser that looks for
115 * format strings and uses sprintf to process them one at a time.
116 * Literal text is just copied straight to the destination.
117 * The result is appended to the destination string. The parser
118 * recognizes field-width specifiers and the 'l' qualifier; it
119 * may need to be extended to recognize other qualifiers but so
120 * far this seems to be enough.
122 int ber_pvt_vsnprintf( char *str, size_t n, const char *fmt, va_list ap )
124 char *ptr, *pct, *s2, *f2, *end;
136 for (pct = strchr(ptr, '%'); pct; pct = strchr(ptr, '%')) {
140 if (rem < 1) return -1;
141 if (rem < len) len = rem;
143 s2 = lutil_strncopy( s2, ptr, len );
144 /* Did we cheat the length above? If so, bail out */
145 if (len < pct-ptr) return -1;
146 for (pct++, f2 = fm2+1; isdigit(*pct);) *f2++ = *pct++;
147 if (*pct == 'l') *f2++ = *pct++;
148 if (*pct == '%') *s2++ = '%';
153 char *ss = va_arg(ap, char *);
154 /* Attempt to limit sprintf output. This
155 * may be thrown off if field widths were
156 * specified for this string.
158 * If it looks like the string is too
159 * long for the remaining buffer, bypass
160 * sprintf and just copy what fits, then
163 if (end && strlen(ss) > (rem=end-s2)) {
164 strncpy(s2, ss, rem);
167 s2 += sprintf(s2, fm2, ss);
170 s2 += sprintf(s2, fm2, va_arg(ap, int));
178 s2 = lutil_strncopy( s2, ptr, rem );
181 if (rem < 0) return -1;
183 s2 = lutil_strcopy( s2, ptr );
188 int ber_pvt_vsprintf( char *str, const char *fmt, va_list ap )
190 return vsnprintf( str, 0, fmt, ap );
193 /* The fixed buffer size here is a problem, we don't know how
194 * to flush the buffer and keep printing if the msg is too big.
195 * Hopefully we never try to write something bigger than this
198 int ber_pvt_vfprintf( FILE *fp, const char *fmt, va_list ap )
203 vsnprintf( buf, sizeof(buf), fmt, ap );
205 res = fputs( buf, fp );
206 if (res == EOF) res = -1;
210 int ber_pvt_printf( const char *fmt, ... )
216 res = ber_pvt_vfprintf( stdout, fmt, ap );
221 int ber_pvt_fprintf( FILE *fp, const char *fmt, ... )
227 res = ber_pvt_vfprintf( fp, fmt, ap );