3 * Copyright 2002 The OpenLDAP Foundation, All Rights Reserved.
4 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
10 #include <ac/stdarg.h>
11 #include <ac/string.h>
13 #if !defined(HAVE_VSNPRINTF) && !defined(HAVE_EBCDIC)
14 /* Write at most n characters to the buffer in str, return the
15 * number of chars written or -1 if the buffer would have been
18 * This is portable to any POSIX-compliant system. We use pipe()
19 * to create a valid file descriptor, and then fdopen() it to get
20 * a valid FILE pointer. The user's buffer and size are assigned
21 * to the FILE pointer using setvbuf. Then we close the read side
22 * of the pipe to invalidate the descriptor.
24 * If the write arguments all fit into size n, the write will
25 * return successfully. If the write is too large, the stdio
26 * buffer will need to be flushed to the underlying file descriptor.
27 * The flush will fail because it is attempting to write to a
28 * broken pipe, and the write will be terminated.
31 /* This emulation uses vfprintf; on OS/390 we're also emulating
32 * that function so it's more efficient just to have a separate
33 * version of vsnprintf there.
35 #include <ac/signal.h>
36 int ber_pvt_vsnprintf( char *str, size_t n, const char *fmt, va_list ap )
42 if (pipe( fds )) return -1;
44 f = fdopen( fds[1], "w" );
50 setvbuf( f, str, _IOFBF, n );
51 sig = signal( SIGPIPE, SIG_IGN );
54 res = vfprintf( f, fmt, ap );
57 signal( SIGPIPE, sig );
63 int ber_pvt_snprintf( char *str, size_t n, const char *fmt, ... )
69 res = vsnprintf( str, n, fmt, ap );
73 #endif /* !HAVE_VSNPRINTF */
76 /* stdio replacements with ASCII/EBCDIC translation for OS/390.
77 * The OS/390 port depends on the CONVLIT compiler option being
78 * used to force character and string literals to be compiled in
79 * ISO8859-1, and the __LIBASCII cpp symbol to be defined to use the
80 * OS/390 ASCII-compatibility library. This library only supplies
81 * an ASCII version of sprintf, so other needed functions are
84 * All of the internal character manipulation is done in ASCII,
85 * but file I/O is EBCDIC, so we catch any stdio reading/writing
86 * of files here and do the translations.
92 char *ber_pvt_fgets( char *s, int n, FILE *fp )
94 s = (char *)fgets( s, n, fp );
99 int ber_pvt_fputs( const char *str, FILE *fp )
103 strncpy( buf, str, sizeof(buf) );
105 return fputs( buf, fp );
108 /* The __LIBASCII doesn't include a working vsprintf, so we make do
109 * using just sprintf. This is a very simplistic parser that looks for
110 * format strings and uses sprintf to process them one at a time.
111 * Literal text is just copied straight to the destination.
112 * The result is appended to the destination string. The parser
113 * recognizes field-width specifiers and the 'l' qualifier; it
114 * may need to be extended to recognize other qualifiers but so
115 * far this seems to be enough.
117 int ber_pvt_vsnprintf( char *str, size_t n, const char *fmt, va_list ap )
119 char *ptr, *pct, *s2, *f2, *end;
131 for (pct = strchr(ptr, '%'); pct; pct = strchr(ptr, '%')) {
135 if (rem < 1) return -1;
136 if (rem < len) len = rem;
138 s2 = ber_pvt_strncopy( s2, ptr, len );
139 /* Did we cheat the length above? If so, bail out */
140 if (len < pct-ptr) return -1;
141 for (pct++, f2 = fm2+1; isdigit(*pct);) *f2++ = *pct++;
142 if (*pct == 'l') *f2++ = *pct++;
143 if (*pct == '%') *s2++ = '%';
148 char *ss = va_arg(ap, char *);
149 /* Attempt to limit sprintf output. This
150 * may be thrown off if field widths were
151 * specified for this string.
153 * If it looks like the string is too
154 * long for the remaining buffer, bypass
155 * sprintf and just copy what fits, then
158 if (end && strlen(ss) > (rem=end-s2)) {
159 strncpy(s2, ss, rem);
162 s2 += sprintf(s2, fm2, ss);
165 s2 += sprintf(s2, fm2, va_arg(ap, int));
173 s2 = ber_pvt_strncopy( s2, ptr, rem );
176 if (rem < 0) return -1;
178 s2 = ber_pvt_strcopy( s2, ptr );
183 int ber_pvt_vsprintf( char *str, const char *fmt, va_list ap )
185 return vsnprintf( str, 0, fmt, ap );
188 /* The fixed buffer size here is a problem, we don't know how
189 * to flush the buffer and keep printing if the msg is too big.
190 * Hopefully we never try to write something bigger than this
193 int ber_pvt_vfprintf( FILE *fp, const char *fmt, va_list ap )
198 vsnprintf( buf, sizeof(buf), fmt, ap );
200 res = fputs( buf, fp );
201 if (res == EOF) res = -1;
205 int ber_pvt_printf( const char *fmt, ... )
211 res = ber_pvt_vfprintf( stdout, fmt, ap );
216 int ber_pvt_fprintf( FILE *fp, const char *fmt, ... )
222 res = ber_pvt_vfprintf( fp, fmt, ap );