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+ /*
+ ** Act - Abstract Container Type Library
+ ** Copyright (c) 1999-2000 Ralf S. Engelschall <rse@engelschall.com>
+ **
+ ** This file is part of Act, a library for dealing with Abstract
+ ** Container Types which can be found at http://www.ossp.org/pkg/act/.
+ **
+ ** Permission to use, copy, modify, and distribute this software for
+ ** any purpose with or without fee is hereby granted, provided that
+ ** the above copyright notice and this permission notice appear in all
+ ** copies.
+ **
+ ** THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 AUTHORS AND COPYRIGHT HOLDERS AND THEIR
+ ** 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.
+ **
+ ** act_str.c: string formatting (implementation)
+ */
+
+ /*
+ * Copyright Patrick Powell 1995
+ * This code is based on code written by Patrick Powell <papowell@astart.com>
+ * It may be used for any purpose as long as this notice remains intact
+ * on all source code distributions.
+ */
+
+ /*
+ * This code contains numerious changes and enhancements which were
+ * made by lots of contributors over the last years to Patrick Powell's
+ * original code:
+ *
+ * o Patrick Powell <papowell@astart.com> (1995)
+ * o Brandon Long <blong@fiction.net> (1996, for Mutt)
+ * o Thomas Roessler <roessler@guug.de> (1998, for Mutt)
+ * o Michael Elkins <me@cs.hmc.edu> (1998, for Mutt)
+ * o Andrew Tridgell <tridge@samba.org> (1998, for Samba)
+ * o Luke Mewburn <lukem@netbsd.org> (1999, for LukemFTP)
+ * o Ralf S. Engelschall <rse@engelschall.com> (1999, for OSSP)
+ */
+
+ #include <string.h> /* for size_t */
+ #include <stdlib.h> /* for malloc(3) */
+ #include <stdarg.h> /* for va_list */
+ #include <ctype.h> /* for isdigit(3) */
+ #include <limits.h> /* for integer max */
+
+ #include "act_p.h"
+
+ #if HAVE_LONGLONG
+ #define LLONG long long
+ #else
+ #define LLONG long
+ #endif
+
+ #if HAVE_LONGDOUBLE
+ #define LDOUBLE long double
+ #else
+ #define LDOUBLE double
+ #endif
+
+ static void fmtstr (char *, size_t *, size_t, char *, int, int, int);
+ static void fmtint (char *, size_t *, size_t, LLONG, int, int, int, int);
+ static void fmtfp (char *, size_t *, size_t, LDOUBLE, int, int, int);
+ static void dopr_outch (char *, size_t *, size_t, int);
+
+ /* format read states */
+ #define DP_S_DEFAULT 0
+ #define DP_S_FLAGS 1
+ #define DP_S_MIN 2
+ #define DP_S_DOT 3
+ #define DP_S_MAX 4
+ #define DP_S_MOD 5
+ #define DP_S_CONV 6
+ #define DP_S_DONE 7
+
+ /* format flags - Bits */
+ #define DP_F_MINUS (1 << 0)
+ #define DP_F_PLUS (1 << 1)
+ #define DP_F_SPACE (1 << 2)
+ #define DP_F_NUM (1 << 3)
+ #define DP_F_ZERO (1 << 4)
+ #define DP_F_UP (1 << 5)
+ #define DP_F_UNSIGNED (1 << 6)
+
+ /* conversion flags */
+ #define DP_C_SHORT 1
+ #define DP_C_LONG 2
+ #define DP_C_LDOUBLE 3
+ #define DP_C_LLONG 4
+
+ /* some handy macros */
+ #define char_to_int(p) (p - '0')
+ #define MAX(p,q) ((p >= q) ? p : q)
+ #define NUL '\0'
+
+ static void
+ dopr(
+ char *buffer,
+ size_t maxlen,
+ size_t *retlen,
+ const char *format,
+ va_list args)
+ {
+ char ch;
+ LLONG value;
+ LDOUBLE fvalue;
+ char *strvalue;
+ int min;
+ int max;
+ int state;
+ int flags;
+ int cflags;
+ size_t currlen;
+
+ state = DP_S_DEFAULT;
+ flags = currlen = cflags = min = 0;
+ max = -1;
+ ch = *format++;
+
+ if (maxlen == -1)
+ /* possible maximum size in a size_t */
+ maxlen = (~(1<<((sizeof(size_t)*8)-2)));
+
+ while (state != DP_S_DONE) {
+ if ((ch == NUL) || (currlen >= maxlen))
+ state = DP_S_DONE;
+
+ switch (state) {
+ case DP_S_DEFAULT:
+ if (ch == '%')
+ state = DP_S_FLAGS;
+ else
+ dopr_outch(buffer, &currlen, maxlen, ch);
+ ch = *format++;
+ break;
+ case DP_S_FLAGS:
+ switch (ch) {
+ case '-':
+ flags |= DP_F_MINUS;
+ ch = *format++;
+ break;
+ case '+':
+ flags |= DP_F_PLUS;
+ ch = *format++;
+ break;
+ case ' ':
+ flags |= DP_F_SPACE;
+ ch = *format++;
+ break;
+ case '#':
+ flags |= DP_F_NUM;
+ ch = *format++;
+ break;
+ case '0':
+ flags |= DP_F_ZERO;
+ ch = *format++;
+ break;
+ default:
+ state = DP_S_MIN;
+ break;
+ }
+ break;
+ case DP_S_MIN:
+ if (isdigit((unsigned char)ch)) {
+ min = 10 * min + char_to_int(ch);
+ ch = *format++;
+ } else if (ch == '*') {
+ min = va_arg(args, int);
+ ch = *format++;
+ state = DP_S_DOT;
+ } else
+ state = DP_S_DOT;
+ break;
+ case DP_S_DOT:
+ if (ch == '.') {
+ state = DP_S_MAX;
+ ch = *format++;
+ } else
+ state = DP_S_MOD;
+ break;
+ case DP_S_MAX:
+ if (isdigit((unsigned char)ch)) {
+ if (max < 0)
+ max = 0;
+ max = 10 * max + char_to_int(ch);
+ ch = *format++;
+ } else if (ch == '*') {
+ max = va_arg(args, int);
+ ch = *format++;
+ state = DP_S_MOD;
+ } else
+ state = DP_S_MOD;
+ break;
+ case DP_S_MOD:
+ switch (ch) {
+ case 'h':
+ cflags = DP_C_SHORT;
+ ch = *format++;
+ break;
+ case 'l':
+ if (*format == 'l') {
+ cflags = DP_C_LLONG;
+ format++;
+ } else
+ cflags = DP_C_LONG;
+ ch = *format++;
+ break;
+ case 'q':
+ cflags = DP_C_LLONG;
+ ch = *format++;
+ break;
+ case 'L':
+ cflags = DP_C_LDOUBLE;
+ ch = *format++;
+ break;
+ default:
+ break;
+ }
+ state = DP_S_CONV;
+ break;
+ case DP_S_CONV:
+ switch (ch) {
+ case 'd':
+ case 'i':
+ switch (cflags) {
+ case DP_C_SHORT:
+ value = (short int)va_arg(args, int);
+ break;
+ case DP_C_LONG:
+ value = va_arg(args, long int);
+ break;
+ case DP_C_LLONG:
+ value = va_arg(args, LLONG);
+ break;
+ default:
+ value = va_arg(args, int);
+ break;
+ }
+ fmtint(buffer, &currlen, maxlen, value, 10, min, max, flags);
+ break;
+ case 'X':
+ flags |= DP_F_UP;
+ /* FALLTHROUGH */
+ case 'x':
+ case 'o':
+ case 'u':
+ flags |= DP_F_UNSIGNED;
+ switch (cflags) {
+ case DP_C_SHORT:
+ value = (unsigned short int)va_arg(args, unsigned int);
+ break;
+ case DP_C_LONG:
+ value = (LLONG)va_arg(args, unsigned long int);
+ break;
+ case DP_C_LLONG:
+ value = va_arg(args, unsigned LLONG);
+ break;
+ default:
+ value = (LLONG)va_arg(args, unsigned int);
+ break;
+ }
+ fmtint(buffer, &currlen, maxlen, value,
+ ch == 'o' ? 8 : (ch == 'u' ? 10 : 16),
+ min, max, flags);
+ break;
+ case 'f':
+ if (cflags == DP_C_LDOUBLE)
+ fvalue = va_arg(args, LDOUBLE);
+ else
+ fvalue = va_arg(args, double);
+ fmtfp(buffer, &currlen, maxlen, fvalue, min, max, flags);
+ break;
+ case 'E':
+ flags |= DP_F_UP;
+ case 'e':
+ if (cflags == DP_C_LDOUBLE)
+ fvalue = va_arg(args, LDOUBLE);
+ else
+ fvalue = va_arg(args, double);
+ break;
+ case 'G':
+ flags |= DP_F_UP;
+ case 'g':
+ if (cflags == DP_C_LDOUBLE)
+ fvalue = va_arg(args, LDOUBLE);
+ else
+ fvalue = va_arg(args, double);
+ break;
+ case 'c':
+ dopr_outch(buffer, &currlen, maxlen, va_arg(args, int));
+ break;
+ case 's':
+ strvalue = va_arg(args, char *);
+ if (max < 0)
+ max = maxlen;
+ fmtstr(buffer, &currlen, maxlen, strvalue, flags, min, max);
+ break;
+ case 'p':
+ value = (long)va_arg(args, void *);
+ fmtint(buffer, &currlen, maxlen, value, 16, min, max, flags);
+ break;
+ case 'n': /* XXX */
+ if (cflags == DP_C_SHORT) {
+ short int *num;
+ num = va_arg(args, short int *);
+ *num = currlen;
+ } else if (cflags == DP_C_LONG) { /* XXX */
+ long int *num;
+ num = va_arg(args, long int *);
+ *num = (long int) currlen;
+ } else if (cflags == DP_C_LLONG) { /* XXX */
+ LLONG *num;
+ num = va_arg(args, LLONG *);
+ *num = (LLONG) currlen;
+ } else {
+ int *num;
+ num = va_arg(args, int *);
+ *num = currlen;
+ }
+ break;
+ case '%':
+ dopr_outch(buffer, &currlen, maxlen, ch);
+ break;
+ case 'w':
+ /* not supported yet, treat as next char */
+ ch = *format++;
+ break;
+ default:
+ /* unknown, skip */
+ break;
+ }
+ ch = *format++;
+ state = DP_S_DEFAULT;
+ flags = cflags = min = 0;
+ max = -1;
+ break;
+ case DP_S_DONE:
+ break;
+ default:
+ break;
+ }
+ }
+ if (currlen >= maxlen - 1)
+ currlen = maxlen - 1;
+ if (buffer != NULL)
+ buffer[currlen] = NUL;
+ *retlen = currlen;
+ return;
+ }
+
+ static void
+ fmtstr(
+ char *buffer,
+ size_t *currlen,
+ size_t maxlen,
+ char *value,
+ int flags,
+ int min,
+ int max)
+ {
+ int padlen, strln;
+ int cnt = 0;
+
+ if (value == 0)
+ value = "<NULL>";
+ for (strln = 0; value[strln] != '\0'; strln++)
+ ;
+ padlen = min - strln;
+ if (padlen < 0)
+ padlen = 0;
+ if (flags & DP_F_MINUS)
+ padlen = -padlen;
+
+ while ((padlen > 0) && (cnt < max)) {
+ dopr_outch(buffer, currlen, maxlen, ' ');
+ --padlen;
+ ++cnt;
+ }
+ while (*value && (cnt < max)) {
+ dopr_outch(buffer, currlen, maxlen, *value++);
+ ++cnt;
+ }
+ while ((padlen < 0) && (cnt < max)) {
+ dopr_outch(buffer, currlen, maxlen, ' ');
+ ++padlen;
+ ++cnt;
+ }
+ }
+
+ static void
+ fmtint(
+ char *buffer,
+ size_t *currlen,
+ size_t maxlen,
+ LLONG value,
+ int base,
+ int min,
+ int max,
+ int flags)
+ {
+ int signvalue = 0;
+ unsigned LLONG uvalue;
+ char convert[20];
+ int place = 0;
+ int spadlen = 0;
+ int zpadlen = 0;
+ int caps = 0;
+
+ if (max < 0)
+ max = 0;
+ uvalue = value;
+ if (!(flags & DP_F_UNSIGNED)) {
+ if (value < 0) {
+ signvalue = '-';
+ uvalue = -value;
+ } else if (flags & DP_F_PLUS)
+ signvalue = '+';
+ else if (flags & DP_F_SPACE)
+ signvalue = ' ';
+ }
+ if (flags & DP_F_UP)
+ caps = 1;
+ do {
+ convert[place++] =
+ (caps ? "0123456789ABCDEF" : "0123456789abcdef")
+ [uvalue % (unsigned) base];
+ uvalue = (uvalue / (unsigned) base);
+ } while (uvalue && (place < 20));
+ if (place == 20)
+ place--;
+ convert[place] = 0;
+
+ zpadlen = max - place;
+ spadlen = min - MAX(max, place) - (signvalue ? 1 : 0);
+ if (zpadlen < 0)
+ zpadlen = 0;
+ if (spadlen < 0)
+ spadlen = 0;
+ if (flags & DP_F_ZERO) {
+ zpadlen = MAX(zpadlen, spadlen);
+ spadlen = 0;
+ }
+ if (flags & DP_F_MINUS)
+ spadlen = -spadlen;
+
+ /* spaces */
+ while (spadlen > 0) {
+ dopr_outch(buffer, currlen, maxlen, ' ');
+ --spadlen;
+ }
+
+ /* sign */
+ if (signvalue)
+ dopr_outch(buffer, currlen, maxlen, signvalue);
+
+ /* zeros */
+ if (zpadlen > 0) {
+ while (zpadlen > 0) {
+ dopr_outch(buffer, currlen, maxlen, '0');
+ --zpadlen;
+ }
+ }
+ /* digits */
+ while (place > 0)
+ dopr_outch(buffer, currlen, maxlen, convert[--place]);
+
+ /* left justified spaces */
+ while (spadlen < 0) {
+ dopr_outch(buffer, currlen, maxlen, ' ');
+ ++spadlen;
+ }
+ return;
+ }
+
+ static LDOUBLE
+ abs_val(LDOUBLE value)
+ {
+ LDOUBLE result = value;
+ if (value < 0)
+ result = -value;
+ return result;
+ }
+
+ static LDOUBLE
+ pow10(int exp)
+ {
+ LDOUBLE result = 1;
+ while (exp) {
+ result *= 10;
+ exp--;
+ }
+ return result;
+ }
+
+ static long
+ round(LDOUBLE value)
+ {
+ long intpart;
+ intpart = (long) value;
+ value = value - intpart;
+ if (value >= 0.5)
+ intpart++;
+ return intpart;
+ }
+
+ static void
+ fmtfp(
+ char *buffer,
+ size_t *currlen,
+ size_t maxlen,
+ LDOUBLE fvalue,
+ int min,
+ int max,
+ int flags)
+ {
+ int signvalue = 0;
+ LDOUBLE ufvalue;
+ char iconvert[20];
+ char fconvert[20];
+ int iplace = 0;
+ int fplace = 0;
+ int padlen = 0;
+ int zpadlen = 0;
+ int caps = 0;
+ long intpart;
+ long fracpart;
+
+ if (max < 0)
+ max = 6;
+ ufvalue = abs_val(fvalue);
+ if (fvalue < 0)
+ signvalue = '-';
+ else if (flags & DP_F_PLUS)
+ signvalue = '+';
+ else if (flags & DP_F_SPACE)
+ signvalue = ' ';
+
+ intpart = (long)ufvalue;
+
+ /* sorry, we only support 9 digits past the decimal because of our
+ conversion method */
+ if (max > 9)
+ max = 9;
+
+ /* we "cheat" by converting the fractional part to integer by
+ multiplying by a factor of 10 */
+ fracpart = round((pow10(max)) * (ufvalue - intpart));
+
+ if (fracpart >= pow10(max)) {
+ intpart++;
+ fracpart -= pow10(max);
+ }
+
+ /* convert integer part */
+ do {
+ iconvert[iplace++] =
+ (caps ? "0123456789ABCDEF"
+ : "0123456789abcdef")[intpart % 10];
+ intpart = (intpart / 10);
+ } while (intpart && (iplace < 20));
+ if (iplace == 20)
+ iplace--;
+ iconvert[iplace] = 0;
+
+ /* convert fractional part */
+ do {
+ fconvert[fplace++] =
+ (caps ? "0123456789ABCDEF"
+ : "0123456789abcdef")[fracpart % 10];
+ fracpart = (fracpart / 10);
+ } while (fracpart && (fplace < 20));
+ if (fplace == 20)
+ fplace--;
+ fconvert[fplace] = 0;
+
+ /* -1 for decimal point, another -1 if we are printing a sign */
+ padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
+ zpadlen = max - fplace;
+ if (zpadlen < 0)
+ zpadlen = 0;
+ if (padlen < 0)
+ padlen = 0;
+ if (flags & DP_F_MINUS)
+ padlen = -padlen;
+
+ if ((flags & DP_F_ZERO) && (padlen > 0)) {
+ if (signvalue) {
+ dopr_outch(buffer, currlen, maxlen, signvalue);
+ --padlen;
+ signvalue = 0;
+ }
+ while (padlen > 0) {
+ dopr_outch(buffer, currlen, maxlen, '0');
+ --padlen;
+ }
+ }
+ while (padlen > 0) {
+ dopr_outch(buffer, currlen, maxlen, ' ');
+ --padlen;
+ }
+ if (signvalue)
+ dopr_outch(buffer, currlen, maxlen, signvalue);
+
+ while (iplace > 0)
+ dopr_outch(buffer, currlen, maxlen, iconvert[--iplace]);
+
+ /*
+ * Decimal point. This should probably use locale to find the correct
+ * char to print out.
+ */
+ if (max > 0) {
+ dopr_outch(buffer, currlen, maxlen, '.');
+
+ while (fplace > 0)
+ dopr_outch(buffer, currlen, maxlen, fconvert[--fplace]);
+ }
+ while (zpadlen > 0) {
+ dopr_outch(buffer, currlen, maxlen, '0');
+ --zpadlen;
+ }
+
+ while (padlen < 0) {
+ dopr_outch(buffer, currlen, maxlen, ' ');
+ ++padlen;
+ }
+ return;
+ }
+
+ static void
+ dopr_outch(
+ char *buffer,
+ size_t *currlen,
+ size_t maxlen,
+ int c)
+ {
+ if (*currlen < maxlen) {
+ if (buffer != NULL)
+ buffer[(*currlen)] = (char)c;
+ (*currlen)++;
+ }
+ return;
+ }
+
+ intern int
+ act_vsnprintf(
+ char *str,
+ size_t count,
+ const char *fmt,
+ va_list args)
+ {
+ size_t retlen;
+
+ if (str != NULL)
+ str[0] = NUL;
+ dopr(str, count, &retlen, fmt, args);
+ return retlen;
+ }
+
+ intern int
+ act_snprintf(
+ char *str,
+ size_t count,
+ const char *fmt,
+ ...)
+ {
+ va_list ap;
+ int rv;
+
+ va_start(ap, fmt);
+ rv = act_vsnprintf(str, count, fmt, ap);
+ va_end(ap);
+ return rv;
+ }
+
+ intern char *
+ act_vasprintf(
+ const char *fmt,
+ va_list ap)
+ {
+ char *rv;
+ int n;
+
+ n = act_vsnprintf(NULL, -1, fmt, ap);
+ if ((rv = (char *)malloc(n+1)) == NULL)
+ return NULL;
+ act_vsnprintf(rv, n+1, fmt, ap);
+ return rv;
+ }
+
+ intern char *
+ act_asprintf(
+ const char *fmt,
+ ...)
+ {
+ va_list ap;
+ char *rv;
+
+ va_start(ap, fmt);
+ rv = act_vasprintf(fmt, ap);
+ va_end(ap);
+ return rv;
+ }
+
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