+/*
+ * Copyright (c) 1997 - 2004 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
/* snprintf.c - Formatted, length-limited print to a string */
#include <afsconfig.h>
("$Header$");
#include <sys/types.h>
+#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <ctype.h>
#include <sys/socket.h>
#endif
-#define MAXPREC 100
-
-/* Generate an ASCII representation of an integer <val>, as follows:
- * <base> indicates the base to be used (2-36)
- * <uc> is nonzero if letter digits should be uppercase
- * <prec> is the minimum number of digits
- * The resulting number is stored in <buf>, which must be long enough
- * to receive it. The minimum length is <prec> or ceil(log{base}(val)),
- * whichever is larger, plus room for a trailing NUL.
- */
-static void
-mkint(char *buf, afs_uintmax_t val, int base, int uc, unsigned prec)
-{
- int len = 0, dig, i;
-
- while (val) {
- dig = (int) (val % base);
- val = (val - dig) / base;
- if (dig < 10)
- dig = dig + '0';
- else if (uc)
- dig = dig + 'A' - 10;
- else
- dig = dig + 'a' - 10;
- buf[len++] = dig;
- }
- while (len < prec)
- buf[len++] = '0';
- for (i = 0; i < (len + 1) / 2; i++) {
- dig = buf[i];
- buf[i] = buf[len - i - 1];
- buf[len - i - 1] = dig;
- }
- buf[len] = 0;
-}
-
-
-/* This function is a mostly-complete implementation of snprintf,
- * with the following features:
+/* This is an enhanced version of the *printf functionality shipped
+ * with Heimdal. In addition to the standard Unix formatting types
+ * this version also supports Microsoft's I32 and I64 type modifiers
+ * and the OpenAFS I type which is used to generate output from
+ * network byte order IPv4 addresses (either dotted notation or
+ * hostname lookups. Implementation details follow:
*
* - Actually obeys the length limit, which (unfortunately) many
* implementations of snprintf do not.
* (d, i, o, u, x, X), floating-point values (f, e, E, g, G),
* and strings and characters (c, s, %), plus a few unusual
* but useful ones described below.
+ *
+ * - The Microsoft integral size modifiers I32 and I64 are
+ * supported. I32 is equivalent to 'l'.
+ * I64 is equivalent to 'll'.
*
* - Supports all the standard flags (-, 0, +, space, #). These
* flags are ignored if used when they are not appropriate.
* instead of in the format string. There is a maximum precision
* of 100 digits.
*
- * - At present, the 'p' specifier for printing pointers is not
- * implemented, because it is inherently non-portable and thus
- * can be implemented correctly only by the compiler's run-time
- * library.
+ * - The 'p' specifier for printing pointers is implemented using
+ * compile time knowledge. (AFS_64BITPOINTER_ENV)
*
* - Floating-point specifier (%e, %f, %g) are implemented by
* calling the standard sprintf, and thus may be unsafe.
* is specified by the user, who knows but cannot change the order
* of the arguments. Such usage is inherently dangerous and
* insecure; thus, it is not supported.
+ *
+ * - Passing in a format and an NULL buffer is supported. This
+ * will compute the size of the buffer required by the format
+ * and the provided input parameters.
*
* The custom format specifier '%I' is supported. This specifier
* takes as its argument an unsigned long integer containing an
* will be padded with spaces on the left to three digits. If
* both '0' and ' ' are given, the ' ' flag will be ignored.
* + The '#' and '+' flags have no effect.
+ *
+ * A test program exists in src/util/tests/snprintf_tests.c.
*/
-int
-afs_vsnprintf(char *p, size_t avail, const char *fmt, va_list ap)
+
+#define MAXPREC 100
+
+enum format_flags {
+ minus_flag = 1,
+ plus_flag = 2,
+ space_flag = 4,
+ alternate_flag = 8,
+ zero_flag = 16
+};
+
+/*
+ * Common state
+ */
+
+struct snprintf_state {
+ unsigned char *str;
+ unsigned char *s;
+ unsigned char *theend;
+ size_t sz;
+ size_t max_sz;
+ void (*append_char)(struct snprintf_state *, unsigned char);
+ /* XXX - methods */
+};
+
+static int
+afs_sn_reserve (struct snprintf_state *state, size_t n)
{
- unsigned int width, precision, haveprec;
- size_t len;
- int ljust, plsign, spsign, altform, zfill;
- int hflag, lflag, count, *countp, j;
- char *x, *y, xbuf[MAXPREC + 21], fbuf[20];
- struct hostent *he;
- struct in_addr ia;
- afs_uintmax_t UVAL;
- afs_intmax_t SVAL;
- afs_intmax_t *llcountp;
- long *lcountp;
- double FVAL;
- short *hcountp;
-
- count = 0;
- avail--;
- while (*fmt && avail) {
- if (*fmt != '%') {
- *p++ = *fmt++;
- avail--;
- count++;
- continue;
+ return state->s + n > state->theend;
+}
+
+static void
+afs_sn_append_char (struct snprintf_state *state, unsigned char c)
+{
+ if (!afs_sn_reserve (state, 1))
+ *state->s++ = c;
+}
+
+static int
+as_reserve (struct snprintf_state *state, size_t n)
+{
+ if (state->s + n > state->theend) {
+ size_t off = state->s - state->str;
+ unsigned char *tmp;
+
+ if (state->max_sz && state->sz >= state->max_sz)
+ return 1;
+
+ state->sz = max(state->sz * 2, state->sz + n);
+ if (state->max_sz)
+ state->sz = min(state->sz, state->max_sz);
+ tmp = (unsigned char *)realloc (state->str, state->sz);
+ if (tmp == NULL)
+ return 1;
+ state->str = tmp;
+ state->s = state->str + off;
+ state->theend = state->str + state->sz - 1;
+ }
+ return 0;
+}
+
+static void
+as_append_char (struct snprintf_state *state, unsigned char c)
+{
+ if(!as_reserve (state, 1))
+ *state->s++ = c;
+}
+
+/* longest integer types */
+
+#ifdef AFS_64BIT_ENV
+typedef afs_uint64 u_longest;
+typedef afs_int64 longest;
+#else
+typedef afs_uint32 u_longest;
+typedef afs_int32 longest;
+#endif
+
+static int
+pad(struct snprintf_state *state, int width, char c)
+{
+ int len = 0;
+ while(width-- > 0){
+ (*state->append_char)(state, c);
+ ++len;
+ }
+ return len;
+}
+
+/* return true if we should use alternatve hex form */
+static int
+use_alternative (int flags, u_longest num, unsigned base)
+{
+ return (flags & alternate_flag) && base == 16 && num != 0;
+}
+
+static int
+append_number(struct snprintf_state *state,
+ u_longest num, unsigned base, const char *rep,
+ int width, int prec, int flags, int minusp)
+{
+ int len = 0;
+ u_longest n = num;
+ char nstr[MAXPREC]; /* enough for <192 bit octal integers */
+ int nstart, nlen;
+ char signchar;
+
+ /* given precision, ignore zero flag */
+ if(prec != -1)
+ flags &= ~zero_flag;
+ else
+ prec = 1;
+
+ /* format number as string */
+ nstart = sizeof(nstr);
+ nlen = 0;
+ nstr[--nstart] = '\0';
+
+ do {
+ nstr[--nstart] = rep[n % base];
+ ++nlen;
+ n /= base;
+ } while(n);
+
+ /* zero value with zero precision should produce no digits */
+ if(prec == 0 && num == 0) {
+ nlen--;
+ nstart++;
+ }
+
+ /* figure out what char to use for sign */
+ if(minusp)
+ signchar = '-';
+ else if((flags & plus_flag))
+ signchar = '+';
+ else if((flags & space_flag))
+ signchar = ' ';
+ else
+ signchar = '\0';
+
+ if((flags & alternate_flag) && base == 8) {
+ /* if necessary, increase the precision to
+ make first digit a zero */
+
+ /* XXX C99 claims (regarding # and %o) that "if the value and
+ precision are both 0, a single 0 is printed", but there is
+ no such wording for %x. This would mean that %#.o would
+ output "0", but %#.x "". This does not make sense, and is
+ also not what other printf implementations are doing. */
+
+ if(prec <= nlen && nstr[nstart] != '0' && nstr[nstart] != '\0')
+ prec = nlen + 1;
+ }
+
+ /* possible formats:
+ pad | sign | alt | zero | digits
+ sign | alt | zero | digits | pad minus_flag
+ sign | alt | zero | digits zero_flag */
+
+ /* if not right justifying or padding with zeros, we need to
+ compute the length of the rest of the string, and then pad with
+ spaces */
+ if(!(flags & (minus_flag | zero_flag))) {
+ if(prec > nlen)
+ width -= prec;
+ else
+ width -= nlen;
+
+ if(use_alternative(flags, num, base))
+ width -= 2;
+
+ if(signchar != '\0')
+ width--;
+
+ /* pad to width */
+ len += pad(state, width, ' ');
+ }
+ if(signchar != '\0') {
+ (*state->append_char)(state, signchar);
+ ++len;
+ }
+ if(use_alternative(flags, num, base)) {
+ (*state->append_char)(state, '0');
+ (*state->append_char)(state, rep[10] + 23); /* XXX */
+ len += 2;
+ }
+ if(flags & zero_flag) {
+ /* pad to width with zeros */
+ if(prec - nlen > width - len - nlen)
+ len += pad(state, prec - nlen, '0');
+ else
+ len += pad(state, width - len - nlen, '0');
+ } else
+ /* pad to prec with zeros */
+ len += pad(state, prec - nlen, '0');
+
+ while(nstr[nstart] != '\0') {
+ (*state->append_char)(state, nstr[nstart++]);
+ ++len;
+ }
+
+ if(flags & minus_flag)
+ len += pad(state, width - len, ' ');
+
+ return len;
+}
+
+/*
+ * return length
+ */
+
+static int
+append_string (struct snprintf_state *state,
+ const unsigned char *arg,
+ int width,
+ int prec,
+ int flags)
+{
+ int len = 0;
+
+ if(arg == NULL)
+ arg = (const unsigned char*)"(null)";
+
+ if(prec != -1)
+ width -= prec;
+ else
+ width -= (int)strlen((const char *)arg);
+ if(!(flags & minus_flag))
+ len += pad(state, width, ' ');
+
+ if (prec != -1) {
+ while (*arg && prec--) {
+ (*state->append_char) (state, *arg++);
+ ++len;
+ }
+ } else {
+ while (*arg) {
+ (*state->append_char) (state, *arg++);
+ ++len;
}
+ }
+ if(flags & minus_flag)
+ len += pad(state, width, ' ');
+ return len;
+}
- /** Found a format specifier **/
- ljust = plsign = spsign = altform = zfill = 0;
- width = precision = haveprec = 0;
- hflag = lflag = 0;
- fmt++;
-
- /* parse format flags */
- while (*fmt) {
- switch (*fmt) {
- case '-':
- ljust = 1;
- fmt++;
- continue; /* left justify */
- case '+':
- plsign = 1;
- fmt++;
- continue; /* use + or - */
- case ' ':
- spsign = 1;
- fmt++;
- continue; /* use space or - */
- case '#':
- altform = 1;
- fmt++;
- continue; /* alternate form */
- case '0':
- zfill = 1;
- fmt++;
- continue; /* pad with 0 */
- default:
- break;
+static int
+append_char(struct snprintf_state *state,
+ unsigned char arg,
+ int width,
+ int flags)
+{
+ int len = 0;
+
+ while(!(flags & minus_flag) && --width > 0) {
+ (*state->append_char) (state, ' ') ;
+ ++len;
+ }
+ (*state->append_char) (state, arg);
+ ++len;
+ while((flags & minus_flag) && --width > 0) {
+ (*state->append_char) (state, ' ');
+ ++len;
+ }
+ return 0;
+}
+
+#define MAXPREC 100
+static int
+append_float(struct snprintf_state *state,
+ char type,
+ double arg,
+ int width,
+ int prec,
+ int flags)
+{
+ int len = 0;
+ char fbuf[20], xbuf[MAXPREC + 21];
+
+ sprintf(fbuf, "%%%s%s.*L%c",
+ (flags & plus_flag) ? "+" : ((flags & space_flag) ? " " : ((flags & minus_flag) ? "-" : "")),
+ (flags & alternate_flag) ? "#" : "", type);
+ if (prec == -1)
+ prec = 6;
+ if (prec > MAXPREC)
+ prec = MAXPREC;
+ sprintf(xbuf, fbuf, prec, arg);
+
+ len = append_string(state, (unsigned char *)xbuf, width, -1, 0);
+ return len;
+}
+
+static int
+append_address(struct snprintf_state *state,
+ afs_uint32 arg,
+ int width,
+ int prec,
+ int flags)
+{
+ int len = 0;
+ struct hostent * he;
+ struct in_addr ia;
+ char * x, *y;
+
+ /* IP address:
+ * value is provided as a network-order unsigned long integer
+ * precision specifies max hostname length, as for %s
+ * if precision is explicitly 0, no hostname lookup is done
+ * if 0fill specified, IPaddr fields are 0-filled to 3 digits
+ * if spsign specified, IPaddr fields are space-filled to 3 digits
+ */
+ ia.s_addr = arg;
+ if (prec == 0)
+ he = 0;
+ else
+ he = gethostbyaddr((char *)&ia, 4, AF_INET);
+ if (he) {
+ x = he->h_name;
+ len = (int)strlen(x);
+ if (prec != -1 && prec < len)
+ width = prec;
+ else
+ width = len;
+ if (flags & alternate_flag) {
+ for (y = x; *y; y++)
+ if (isupper(*y))
+ *y = tolower(*y);
+ } else if (flags & plus_flag) {
+ for (y = x; *y; y++)
+ if (islower(*y))
+ *y = toupper(*y);
+ }
+ len = append_string(state, (unsigned char *)x, width, prec, 0);
+ } else {
+ char xbuf[16];
+ arg = ntohl(arg);
+ if (flags & zero_flag) {
+ x = "%03u.%03u.%03u.%03u";
+ } else if (flags & space_flag) {
+ x = "%3u.%3u.%3u.%3u";
+ } else {
+ x = "%u.%u.%u.%u";
+ }
+ /* typecast to whatever '%u' is! */
+ sprintf(xbuf, x, (unsigned int)((arg & 0xff000000) >> 24),
+ (unsigned int)((arg & 0x00ff0000) >> 16),
+ (unsigned int)((arg & 0x0000ff00) >> 8),
+ (unsigned int)(arg & 0x000000ff));
+ len = append_string(state, (unsigned char *)xbuf, 0, -1, 0);
+ }
+
+ return len;
+}
+
+/*
+ * This can't be made into a function...
+ */
+
+#if defined(AFS_64BIT_ENV)
+#if defined(AFS_NT40_ENV)
+
+#define PARSE_INT_FORMAT(res, arg, unsig) \
+if (long_long_flag) \
+ res = (unsig __int64)va_arg(arg, unsig __int64); \
+else if (long_flag || addr_flag) \
+ res = (unsig long)va_arg(arg, unsig long); \
+else if (size_t_flag) \
+ res = (size_t)va_arg(arg, size_t); \
+else if (short_flag) \
+ res = (unsig short)va_arg(arg, unsig int); \
+else \
+ res = (unsig int)va_arg(arg, unsig int)
+
+#else /* AFS_NT40_ENV */
+
+#define PARSE_INT_FORMAT(res, arg, unsig) \
+if (long_long_flag) \
+ res = (unsig long long)va_arg(arg, unsig long long); \
+else if (long_flag || addr_flag) \
+ res = (unsig long)va_arg(arg, unsig long); \
+else if (size_t_flag) \
+ res = (size_t)va_arg(arg, size_t); \
+else if (short_flag) \
+ res = (unsig short)va_arg(arg, unsig int); \
+else \
+ res = (unsig int)va_arg(arg, unsig int)
+#endif
+
+#else
+
+#define PARSE_INT_FORMAT(res, arg, unsig) \
+if (long_flag || addr_flag) \
+ res = (afs_uint32)va_arg(arg, afs_uint32); \
+else if (size_t_flag) \
+ res = (size_t)va_arg(arg, size_t); \
+else if (short_flag) \
+ res = (unsig short)va_arg(arg, unsig int); \
+else \
+ res = (unsig int)va_arg(arg, unsig int)
+
+#endif
+
+/*
+ * zyxprintf - return length, as snprintf
+ */
+
+static int
+xyzprintf (struct snprintf_state *state, const char *char_format, va_list ap)
+{
+ const unsigned char *format = (const unsigned char *)char_format;
+ unsigned char c;
+ int len = 0;
+
+ while((c = *format++)) {
+ if (c == '%') {
+ int flags = 0;
+ int width = 0;
+ int prec = -1;
+ int size_t_flag = 0;
+ int long_long_flag = 0;
+ int long_flag = 0;
+ int short_flag = 0;
+ int addr_flag = 0;
+
+ /* flags */
+ while((c = *format++)){
+ if(c == '-')
+ flags |= minus_flag;
+ else if(c == '+')
+ flags |= plus_flag;
+ else if(c == ' ')
+ flags |= space_flag;
+ else if(c == '#')
+ flags |= alternate_flag;
+ else if(c == '0')
+ flags |= zero_flag;
+ else if(c == '\'')
+ ; /* just ignore */
+ else
+ break;
}
- break;
- }
- /* parse minimum width */
- if (*fmt == '*') {
- width = va_arg(ap, int);
- fmt++;
- } else
- while (isdigit(*fmt)) {
- width = (width * 10) + (*fmt - '0');
- fmt++;
+ if((flags & space_flag) && (flags & plus_flag))
+ flags ^= space_flag;
+
+ if((flags & minus_flag) && (flags & zero_flag))
+ flags ^= zero_flag;
+
+ /* width */
+ if (isdigit(c))
+ do {
+ width = width * 10 + c - '0';
+ c = *format++;
+ } while(isdigit(c));
+ else if(c == '*') {
+ width = va_arg(ap, int);
+ c = *format++;
}
- /* parse precision */
- if (*fmt == '.') {
- fmt++;
- haveprec = 1;
- if (*fmt == '*') {
- precision = va_arg(ap, int);
- fmt++;
- } else
- while (isdigit(*fmt)) {
- precision = (precision * 10) + (*fmt - '0');
- fmt++;
+ /* precision */
+ if (c == '.') {
+ prec = 0;
+ c = *format++;
+ if (isdigit(c))
+ do {
+ prec = prec * 10 + c - '0';
+ c = *format++;
+ } while(isdigit(c));
+ else if (c == '*') {
+ prec = va_arg(ap, int);
+ c = *format++;
}
- }
+ }
- /* parse size flags */
- while (*fmt) {
- switch (*fmt) {
- case 'h':
- hflag = 1;
- fmt++;
- continue; /* short argument */
- case 'l':
- lflag += 1;
- fmt++;
- continue; /* long argument */
- case 'L':
- lflag = 2;
- fmt++;
- continue; /* long long argument */
- default:
+ /* size */
+
+ if (c == 'h') {
+ short_flag = 1;
+ c = *format++;
+ } else if (c == 'z') {
+ size_t_flag = 1;
+ c = *format++;
+ } else if (c == 'l') {
+ long_flag = 1;
+ c = *format++;
+ if (c == 'l') {
+ long_long_flag = 1;
+ c = *format++;
+ }
+ } else if (c == 'I') {
+ /* This could be either Microsoft I{32,64} notation */
+ c = *format++;
+ if (c == '3') {
+ long_flag = 1;
+ c = *format++;
+ if (c == '2') {
+ c = *format++;
+ }
+ } else if (c == '6') {
+ long_flag = 1;
+ c = *format++;
+ if (c == '4') {
+ long_long_flag = 1;
+ c = *format++;
+ }
+ } else {
+ /* Or the OpenAFS special %I meaning network address */
+ addr_flag = 1;
+ --format;
+ c = 'I';
+ }
+ } else if (c == 'p') {
+ flags |= zero_flag;
+ if (prec == -1)
+ prec = 2 * sizeof(void *);
+ if (sizeof(void *) == sizeof(afs_uint64))
+ long_long_flag = 1;
+ else if (sizeof(void *) == sizeof(afs_uint32))
+ long_flag = 1;
+ else
+ long_flag = 1;
+ }
+
+ if(c != 'd' && c != 'i' && c != 'I')
+ flags &= ~(plus_flag | space_flag);
+
+ switch (c) {
+ case 'c' :
+ append_char(state, va_arg(ap, int), width, flags);
+ ++len;
+ break;
+ case 's' :
+ len += append_string(state,
+ va_arg(ap, unsigned char*),
+ width,
+ prec,
+ flags);
+ break;
+ case 'd' :
+ case 'i' : {
+ longest arg;
+ u_longest num;
+ int minusp = 0;
+
+ PARSE_INT_FORMAT(arg, ap, signed);
+
+ if (arg < 0) {
+ minusp = 1;
+ num = -arg;
+ } else
+ num = arg;
+
+ len += append_number (state, num, 10, "0123456789",
+ width, prec, flags, minusp);
break;
}
- break;
- }
+ case 'u' : {
+ u_longest arg;
- /* parse format specifier */
- if (!*fmt)
- break;
- switch (*fmt++) {
- case 'e':
- case 'E':
- case 'f':
- case 'g':
- case 'G':
- FVAL = va_arg(ap, double);
- sprintf(fbuf, "%%%s%s.*L%c", plsign ? "+" : (spsign ? " " : ""),
- altform ? "#" : "", fmt[-1]);
- if (!haveprec)
- precision = 6;
- if (precision > MAXPREC)
- precision = MAXPREC;
- sprintf(xbuf, fbuf, precision, FVAL);
- x = xbuf;
- len = strlen(x);
- break;
-
- case 'i':
- case 'd': /* signed decimal integer */
- if (lflag > 1)
- SVAL = va_arg(ap, afs_intmax_t);
- else if (lflag)
- SVAL = va_arg(ap, long);
- else if (hflag)
- SVAL = va_arg(ap, int);
- else
- SVAL = va_arg(ap, int);
- UVAL = (SVAL < 0) ? -SVAL : SVAL;
-
- if (SVAL < 0)
- xbuf[0] = '-';
- else if (plsign)
- xbuf[0] = '+';
- else if (spsign)
- xbuf[0] = ' ';
- else
- xbuf[0] = 0;
-
- if (!haveprec) {
- if (zfill && !ljust)
- precision = width - !!xbuf[0];
- else
- precision = 1;
- if (precision < 1 + !!xbuf[0])
- precision = 1 + !!xbuf[0];
- }
- if (precision > MAXPREC)
- precision = MAXPREC;
-
- mkint(xbuf + 1, UVAL, 10, 0, precision);
- x = xbuf + !xbuf[0];
- len = strlen(x);
- break;
-
-
- case 'o': /* unsigned octal integer */
- if (lflag > 1)
- UVAL = va_arg(ap, afs_uintmax_t);
- else if (lflag)
- UVAL = va_arg(ap, unsigned long);
- else if (hflag)
- UVAL = va_arg(ap, unsigned int);
- else
- UVAL = va_arg(ap, unsigned int);
-
- xbuf[0] = '0';
-
- if (!haveprec) {
- if (zfill && !ljust)
- precision = width;
- else
- precision = 1;
+ PARSE_INT_FORMAT(arg, ap, unsigned);
+
+ len += append_number (state, arg, 10, "0123456789",
+ width, prec, flags, 0);
+ break;
}
- if (precision > MAXPREC)
- precision = MAXPREC;
-
- mkint(xbuf + 1, UVAL, 8, 0, precision);
- x = xbuf + (xbuf[1] == '0' || !altform);
- len = strlen(x);
- break;
-
- case 'u': /* unsigned decimal integer */
- if (lflag > 1)
- UVAL = va_arg(ap, afs_uintmax_t);
- else if (lflag)
- UVAL = va_arg(ap, unsigned long);
- else if (hflag)
- UVAL = va_arg(ap, unsigned int);
- else
- UVAL = va_arg(ap, unsigned int);
-
- if (!haveprec) {
- if (zfill && !ljust)
- precision = width;
- else
- precision = 1;
+ case 'o' : {
+ u_longest arg;
+
+ PARSE_INT_FORMAT(arg, ap, unsigned);
+
+ len += append_number (state, arg, 010, "01234567",
+ width, prec, flags, 0);
+ break;
}
- if (precision > MAXPREC)
- precision = MAXPREC;
+ case 'x' : {
+ u_longest arg;
- mkint(xbuf, UVAL, 10, 0, precision);
- x = xbuf;
- len = strlen(x);
- break;
+ PARSE_INT_FORMAT(arg, ap, unsigned);
- case 'p': /* unsigned decimal integer */
- UVAL = va_arg(ap, void *);
+ len += append_number (state, arg, 0x10, "0123456789abcdef",
+ width, prec, flags, 0);
+ break;
+ }
+ case 'X' :{
+ u_longest arg;
- xbuf[0] = '0';
- xbuf[1] = 'x';
+ PARSE_INT_FORMAT(arg, ap, unsigned);
- if (!haveprec) {
- if (zfill && !ljust)
- precision = width;
- else
- precision = 1;
+ len += append_number (state, arg, 0x10, "0123456789ABCDEF",
+ width, prec, flags, 0);
+ break;
}
- if (precision > MAXPREC)
- precision = MAXPREC;
-
- mkint(xbuf + 2, UVAL, 16, 0, precision);
- x = xbuf + ((altform && UVAL) ? 0 : 2);
- len = strlen(x);
- break;
-
- case 'x':
- case 'X': /* unsigned hexadecimal integer */
- if (lflag > 1)
- UVAL = va_arg(ap, afs_uintmax_t);
- else if (lflag)
- UVAL = va_arg(ap, unsigned long);
- else if (hflag)
- UVAL = va_arg(ap, unsigned int);
- else
- UVAL = va_arg(ap, unsigned int);
-
- xbuf[0] = '0';
- xbuf[1] = 'x';
-
- if (!haveprec) {
- if (zfill && !ljust)
- precision = width;
- else
- precision = 1;
+ case 'p' : {
+#ifdef AFS_64BITPOINTER_ENV
+ u_longest arg = (u_longest)va_arg(ap, void*);
+#else
+ u_longest arg = (unsigned long)va_arg(ap, void*);
+#endif
+ len += append_number (state, arg, 0x10, "0123456789ABCDEF",
+ width, prec, flags, 0);
+ break;
}
- if (precision > MAXPREC)
- precision = MAXPREC;
-
- mkint(xbuf + 2, UVAL, 16, 0, precision);
- x = xbuf + ((altform && UVAL) ? 0 : 2);
- len = strlen(x);
- break;
-
- case '%': /* literal % */
- xbuf[0] = '%';
- xbuf[1] = 0;
- x = xbuf;
- len = 1;
- break;
-
- case 'c': /* character */
- xbuf[0] = va_arg(ap, int);
- xbuf[1] = 0;
- x = xbuf;
- len = 1;
- break;
-
- case 's': /* string */
- x = va_arg(ap, char *);
- if (!x)
- x = "<null>";
- len = strlen(x);
- if (haveprec && precision < len)
- len = precision;
- break;
-
- case 'I': /* IP address:
- * value is provided as a network-order unsigned long integer
- * precision specifies max hostname length, as for %s
- * if precision is explicitly 0, no hostname lookup is done
- * if 0fill specified, IPaddr fields are 0-filled to 3 digits
- * if spsign specified, IPaddr fields are space-filled to 3 digits
- */
- UVAL = va_arg(ap, unsigned long);
- ia.s_addr = (unsigned long)UVAL;
- if (haveprec && !precision)
- he = 0;
- else
- he = gethostbyaddr((char *)&ia, 4, AF_INET);
- if (he) {
- x = he->h_name;
- len = strlen(x);
- if (haveprec && precision < len)
- len = precision;
- if (altform) {
- for (y = x; *y; y++)
- if (isupper(*y))
- *y = tolower(*y);
- } else if (plsign) {
- for (y = x; *y; y++)
- if (islower(*y))
- *y = toupper(*y);
- }
- } else {
- UVAL = ntohl((unsigned long)UVAL);
- if (zfill) {
- x = "%03u.%03u.%03u.%03u";
- } else if (spsign) {
- x = "%3u.%3u.%3u.%3u";
- } else {
- x = "%u.%u.%u.%u";
- }
- /* typecast to whatever '%u' is! */
- sprintf(xbuf, x, (unsigned int)((UVAL & 0xff000000) >> 24),
- (unsigned int)((UVAL & 0x00ff0000) >> 16),
- (unsigned int)((UVAL & 0x0000ff00) >> 8),
- (unsigned int)(UVAL & 0x000000ff));
- x = xbuf;
- len = strlen(xbuf);
+ case 'n' : {
+ int *arg = va_arg(ap, int*);
+ *arg = (int)(state->s - state->str);
+ break;
}
- break;
-
- case 'n': /* report count so far */
- if (lflag > 1) {
- llcountp = va_arg(ap, afs_intmax_t *);
- *llcountp = (afs_intmax_t)count;
- } else if (lflag) {
- lcountp = va_arg(ap, long *);
- *lcountp = (long)count;
- } else if (hflag) {
- hcountp = va_arg(ap, short *);
- *hcountp = (short)count;
- } else {
- countp = va_arg(ap, int *);
- *countp = count;
+ case 'I' : {
+ u_longest arg;
+
+ PARSE_INT_FORMAT(arg, ap, unsigned);
+
+ len += append_address (state, (unsigned long)arg, width, prec, flags);
+ break;
+ }
+ case 'e':
+ case 'E':
+ case 'f':
+ case 'g':
+ case 'G': {
+ double arg = (double)va_arg(ap, double);
+
+ len += append_float (state, c, arg, width, prec, flags);
+ break;
+ }
+ case '\0' :
+ --format;
+ /* FALLTHROUGH */
+ case '%' :
+ (*state->append_char)(state, c);
+ ++len;
+ break;
+ default :
+ (*state->append_char)(state, '%');
+ (*state->append_char)(state, c);
+ len += 2;
+ break;
}
- continue;
-
- default: /* unknown specifier */
- continue;
+ } else {
+ (*state->append_char) (state, c);
+ ++len;
}
+ }
+ return len;
+}
- /* render the results */
- if (len > avail)
- len = avail;
- if (!width)
- width = len;
- if (width > avail)
- width = avail;
- j = width - len;
- if (j > 0) {
- avail -= j;
- count += j;
- }
- if (!ljust)
- while (j-- > 0)
- *p++ = ' ';
+int
+afs_vsnprintf (char *str, size_t sz, const char *format, va_list args)
+{
+ struct snprintf_state state;
+ int ret;
+ unsigned char *ustr = (unsigned char *)str;
+
+ state.max_sz = 0;
+ state.sz = sz;
+ state.str = ustr;
+ state.s = ustr;
+ state.theend = ustr + sz - (sz > 0);
+ state.append_char = afs_sn_append_char;
+
+ ret = xyzprintf (&state, format, args);
+ if (state.s != NULL && sz != 0)
+ *state.s = '\0';
+ return ret;
+}
+
+int
+afs_snprintf (char *str, size_t sz, const char *format, ...)
+{
+ va_list args;
+ int ret;
+
+ va_start(args, format);
+ ret = afs_vsnprintf (str, sz, format, args);
+ va_end(args);
+
+#ifdef PARANOIA
+ {
+ int ret2;
+ unsigned char *tmp;
+
+ tmp = (unsigned char *)malloc (sz);
+ if (tmp == NULL)
+ abort ();
+
+ va_start(args, format);
+ ret2 = afs_vsprintf (tmp, format, args);
+ va_end(args);
+ if (ret != ret2 || strcmp(str, tmp))
+ abort ();
+ free (tmp);
+ }
+#endif
- strncpy(p, x, len);
- avail -= len;
- count += len;
- p += len;
+ return ret;
+}
- if (ljust)
- while (j-- > 0)
- *p++ = ' ';
+int
+afs_vasnprintf (char **ret, size_t max_sz, const char *format, va_list args)
+{
+ int st;
+ struct snprintf_state state;
+
+ state.max_sz = max_sz;
+ state.sz = 1;
+ state.str = (unsigned char *)malloc(state.sz);
+ if (state.str == NULL) {
+ *ret = NULL;
+ return -1;
+ }
+ state.s = state.str;
+ state.theend = state.s + state.sz - 1;
+ state.append_char = as_append_char;
+
+ st = xyzprintf (&state, format, args);
+ if (st > state.sz) {
+ free (state.str);
+ *ret = NULL;
+ return -1;
+ } else {
+ char *tmp;
+
+ *state.s = '\0';
+ tmp = (char *)realloc (state.str, st+1);
+ if (tmp == NULL) {
+ free (state.str);
+ *ret = NULL;
+ return -1;
+ }
+ *ret = tmp;
+ return st;
}
- *p = 0;
- return count;
}
int
-afs_snprintf(char *p, size_t avail, const char *fmt, ...)
+afs_vasprintf (char **ret, const char *format, va_list args)
{
- va_list ap;
- int result;
+ return afs_vasnprintf (ret, 0, format, args);
+}
- va_start(ap, fmt);
- result = afs_vsnprintf(p, avail, fmt, ap);
- va_end(ap);
- return result;
+int
+afs_asprintf (char **ret, const char *format, ...)
+{
+ va_list args;
+ int val;
+
+ va_start(args, format);
+ val = afs_vasprintf (ret, format, args);
+ va_end(args);
+
+#ifdef PARANOIA
+ {
+ int ret2;
+ unsigned char *tmp;
+ tmp = (unsigned char *)malloc (val + 1);
+ if (tmp == NULL)
+ abort ();
+
+ va_start(args, format);
+ ret2 = afs_vsprintf (tmp, format, args);
+ va_end(args);
+ if (val != ret2 || strcmp(*ret, tmp))
+ abort ();
+ free (tmp);
+ }
+#endif
+
+ return val;
+}
+
+int
+afs_asnprintf (char **ret, size_t max_sz, const char *format, ...)
+{
+ va_list args;
+ int val;
+
+ va_start(args, format);
+ val = afs_vasnprintf (ret, max_sz, format, args);
+
+#ifdef PARANOIA
+ {
+ int ret2;
+ unsigned char *tmp;
+ tmp = (unsigned char *)malloc (val + 1);
+ if (tmp == NULL)
+ abort ();
+
+ ret2 = afs_vsprintf (tmp, format, args);
+ if (val != ret2 || strcmp(*ret, tmp))
+ abort ();
+ free (tmp);
+ }
+#endif
+
+ va_end(args);
+ return val;
}
-#if defined(AFS_OSF20_ENV) && !defined(AFS_DUX50_ENV) || defined(AFS_AIX32_ENV) || (defined(AFS_SUN55_ENV) && !defined(AFS_SUN56_ENV)) || !defined(HAVE_VSNPRINTF)
+#if defined(AFS_OSF20_ENV) && !defined(AFS_DUX50_ENV) || defined(AFS_AIX32_ENV) || (defined(AFS_SUN55_ENV) && !defined(AFS_SUN56_ENV)) || !defined(HAVE_VSNPRINTF) || defined(TEST_SNPRINTF)
#if defined(AFS_AIX51_ENV) || defined(AFS_NT40_ENV)
int
vsyslog(int priority, const char *format, va_list args)
{
char buf[1024];
- vsnprintf(buf, sizeof(buf), format, args);
+ afs_vsnprintf(buf, sizeof(buf), format, args);
syslog(priority, "%s", buf);
}
#endif
git://git.openafs.org / openafs.git / blobdiff