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-rw-r--r--strings/apr_snprintf.c1407
1 files changed, 1407 insertions, 0 deletions
diff --git a/strings/apr_snprintf.c b/strings/apr_snprintf.c
new file mode 100644
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--- /dev/null
+++ b/strings/apr_snprintf.c
@@ -0,0 +1,1407 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr.h"
+#include "apr_private.h"
+
+#include "apr_lib.h"
+#include "apr_strings.h"
+#include "apr_network_io.h"
+#include "apr_portable.h"
+#include "apr_errno.h"
+#include <math.h>
+#if APR_HAVE_CTYPE_H
+#include <ctype.h>
+#endif
+#if APR_HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#if APR_HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#if APR_HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#if APR_HAVE_LIMITS_H
+#include <limits.h>
+#endif
+#if APR_HAVE_STRING_H
+#include <string.h>
+#endif
+
+typedef enum {
+ NO = 0, YES = 1
+} boolean_e;
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+#ifndef TRUE
+#define TRUE 1
+#endif
+#define NUL '\0'
+
+static const char null_string[] = "(null)";
+#define S_NULL ((char *)null_string)
+#define S_NULL_LEN 6
+
+#define FLOAT_DIGITS 6
+#define EXPONENT_LENGTH 10
+
+/*
+ * NUM_BUF_SIZE is the size of the buffer used for arithmetic conversions
+ *
+ * NOTICE: this is a magic number; do not decrease it
+ */
+#define NUM_BUF_SIZE 512
+
+/*
+ * cvt - IEEE floating point formatting routines.
+ * Derived from UNIX V7, Copyright(C) Caldera International Inc.
+ */
+
+/*
+ * apr_ecvt converts to decimal
+ * the number of digits is specified by ndigit
+ * decpt is set to the position of the decimal point
+ * sign is set to 0 for positive, 1 for negative
+ */
+
+#define NDIG 80
+
+/* buf must have at least NDIG bytes */
+static char *apr_cvt(double arg, int ndigits, int *decpt, int *sign,
+ int eflag, char *buf)
+{
+ register int r2;
+ double fi, fj;
+ register char *p, *p1;
+
+ if (ndigits >= NDIG - 1)
+ ndigits = NDIG - 2;
+ r2 = 0;
+ *sign = 0;
+ p = &buf[0];
+ if (arg < 0) {
+ *sign = 1;
+ arg = -arg;
+ }
+ arg = modf(arg, &fi);
+ /*
+ * Do integer part
+ */
+ if (fi != 0) {
+ p1 = &buf[NDIG];
+ while (p1 > &buf[0] && fi != 0) {
+ fj = modf(fi / 10, &fi);
+ *--p1 = (int) ((fj + .03) * 10) + '0';
+ r2++;
+ }
+ while (p1 < &buf[NDIG])
+ *p++ = *p1++;
+ }
+ else if (arg > 0) {
+ while ((fj = arg * 10) < 1) {
+ arg = fj;
+ r2--;
+ }
+ }
+ p1 = &buf[ndigits];
+ if (eflag == 0)
+ p1 += r2;
+ if (p1 < &buf[0]) {
+ *decpt = -ndigits;
+ buf[0] = '\0';
+ return (buf);
+ }
+ *decpt = r2;
+ while (p <= p1 && p < &buf[NDIG]) {
+ arg *= 10;
+ arg = modf(arg, &fj);
+ *p++ = (int) fj + '0';
+ }
+ if (p1 >= &buf[NDIG]) {
+ buf[NDIG - 1] = '\0';
+ return (buf);
+ }
+ p = p1;
+ *p1 += 5;
+ while (*p1 > '9') {
+ *p1 = '0';
+ if (p1 > buf)
+ ++ * --p1;
+ else {
+ *p1 = '1';
+ (*decpt)++;
+ if (eflag == 0) {
+ if (p > buf)
+ *p = '0';
+ p++;
+ }
+ }
+ }
+ *p = '\0';
+ return (buf);
+}
+
+static char *apr_ecvt(double arg, int ndigits, int *decpt, int *sign, char *buf)
+{
+ return (apr_cvt(arg, ndigits, decpt, sign, 1, buf));
+}
+
+static char *apr_fcvt(double arg, int ndigits, int *decpt, int *sign, char *buf)
+{
+ return (apr_cvt(arg, ndigits, decpt, sign, 0, buf));
+}
+
+/*
+ * apr_gcvt - Floating output conversion to
+ * minimal length string
+ */
+
+static char *apr_gcvt(double number, int ndigit, char *buf, boolean_e altform)
+{
+ int sign, decpt;
+ register char *p1, *p2;
+ register int i;
+ char buf1[NDIG];
+
+ p1 = apr_ecvt(number, ndigit, &decpt, &sign, buf1);
+ p2 = buf;
+ if (sign)
+ *p2++ = '-';
+ for (i = ndigit - 1; i > 0 && p1[i] == '0'; i--)
+ ndigit--;
+ if ((decpt >= 0 && decpt - ndigit > 4)
+ || (decpt < 0 && decpt < -3)) { /* use E-style */
+ decpt--;
+ *p2++ = *p1++;
+ *p2++ = '.';
+ for (i = 1; i < ndigit; i++)
+ *p2++ = *p1++;
+ *p2++ = 'e';
+ if (decpt < 0) {
+ decpt = -decpt;
+ *p2++ = '-';
+ }
+ else
+ *p2++ = '+';
+ if (decpt / 100 > 0)
+ *p2++ = decpt / 100 + '0';
+ if (decpt / 10 > 0)
+ *p2++ = (decpt % 100) / 10 + '0';
+ *p2++ = decpt % 10 + '0';
+ }
+ else {
+ if (decpt <= 0) {
+ if (*p1 != '0')
+ *p2++ = '.';
+ while (decpt < 0) {
+ decpt++;
+ *p2++ = '0';
+ }
+ }
+ for (i = 1; i <= ndigit; i++) {
+ *p2++ = *p1++;
+ if (i == decpt)
+ *p2++ = '.';
+ }
+ if (ndigit < decpt) {
+ while (ndigit++ < decpt)
+ *p2++ = '0';
+ *p2++ = '.';
+ }
+ }
+ if (p2[-1] == '.' && !altform)
+ p2--;
+ *p2 = '\0';
+ return (buf);
+}
+
+/*
+ * The INS_CHAR macro inserts a character in the buffer and writes
+ * the buffer back to disk if necessary
+ * It uses the char pointers sp and bep:
+ * sp points to the next available character in the buffer
+ * bep points to the end-of-buffer+1
+ * While using this macro, note that the nextb pointer is NOT updated.
+ *
+ * NOTE: Evaluation of the c argument should not have any side-effects
+ */
+#define INS_CHAR(c, sp, bep, cc) \
+{ \
+ if (sp) { \
+ if (sp >= bep) { \
+ vbuff->curpos = sp; \
+ if (flush_func(vbuff)) \
+ return -1; \
+ sp = vbuff->curpos; \
+ bep = vbuff->endpos; \
+ } \
+ *sp++ = (c); \
+ } \
+ cc++; \
+}
+
+#define NUM(c) (c - '0')
+
+#define STR_TO_DEC(str, num) \
+ num = NUM(*str++); \
+ while (apr_isdigit(*str)) \
+ { \
+ num *= 10 ; \
+ num += NUM(*str++); \
+ }
+
+/*
+ * This macro does zero padding so that the precision
+ * requirement is satisfied. The padding is done by
+ * adding '0's to the left of the string that is going
+ * to be printed. We don't allow precision to be large
+ * enough that we continue past the start of s.
+ *
+ * NOTE: this makes use of the magic info that s is
+ * always based on num_buf with a size of NUM_BUF_SIZE.
+ */
+#define FIX_PRECISION(adjust, precision, s, s_len) \
+ if (adjust) { \
+ apr_size_t p = (precision + 1 < NUM_BUF_SIZE) \
+ ? precision : NUM_BUF_SIZE - 1; \
+ while (s_len < p) \
+ { \
+ *--s = '0'; \
+ s_len++; \
+ } \
+ }
+
+/*
+ * Macro that does padding. The padding is done by printing
+ * the character ch.
+ */
+#define PAD(width, len, ch) \
+do \
+{ \
+ INS_CHAR(ch, sp, bep, cc); \
+ width--; \
+} \
+while (width > len)
+
+/*
+ * Prefix the character ch to the string str
+ * Increase length
+ * Set the has_prefix flag
+ */
+#define PREFIX(str, length, ch) \
+ *--str = ch; \
+ length++; \
+ has_prefix=YES;
+
+
+/*
+ * Convert num to its decimal format.
+ * Return value:
+ * - a pointer to a string containing the number (no sign)
+ * - len contains the length of the string
+ * - is_negative is set to TRUE or FALSE depending on the sign
+ * of the number (always set to FALSE if is_unsigned is TRUE)
+ *
+ * The caller provides a buffer for the string: that is the buf_end argument
+ * which is a pointer to the END of the buffer + 1 (i.e. if the buffer
+ * is declared as buf[ 100 ], buf_end should be &buf[ 100 ])
+ *
+ * Note: we have 2 versions. One is used when we need to use quads
+ * (conv_10_quad), the other when we don't (conv_10). We're assuming the
+ * latter is faster.
+ */
+static char *conv_10(register apr_int32_t num, register int is_unsigned,
+ register int *is_negative, char *buf_end,
+ register apr_size_t *len)
+{
+ register char *p = buf_end;
+ register apr_uint32_t magnitude = num;
+
+ if (is_unsigned) {
+ *is_negative = FALSE;
+ }
+ else {
+ *is_negative = (num < 0);
+
+ /*
+ * On a 2's complement machine, negating the most negative integer
+ * results in a number that cannot be represented as a signed integer.
+ * Here is what we do to obtain the number's magnitude:
+ * a. add 1 to the number
+ * b. negate it (becomes positive)
+ * c. convert it to unsigned
+ * d. add 1
+ */
+ if (*is_negative) {
+ apr_int32_t t = num + 1;
+ magnitude = ((apr_uint32_t) -t) + 1;
+ }
+ }
+
+ /*
+ * We use a do-while loop so that we write at least 1 digit
+ */
+ do {
+ register apr_uint32_t new_magnitude = magnitude / 10;
+
+ *--p = (char) (magnitude - new_magnitude * 10 + '0');
+ magnitude = new_magnitude;
+ }
+ while (magnitude);
+
+ *len = buf_end - p;
+ return (p);
+}
+
+static char *conv_10_quad(apr_int64_t num, register int is_unsigned,
+ register int *is_negative, char *buf_end,
+ register apr_size_t *len)
+{
+ register char *p = buf_end;
+ apr_uint64_t magnitude = num;
+
+ /*
+ * We see if we can use the faster non-quad version by checking the
+ * number against the largest long value it can be. If <=, we
+ * punt to the quicker version.
+ */
+ if ((magnitude <= APR_UINT32_MAX && is_unsigned)
+ || (num <= APR_INT32_MAX && num >= APR_INT32_MIN && !is_unsigned))
+ return(conv_10((apr_int32_t)num, is_unsigned, is_negative, buf_end, len));
+
+ if (is_unsigned) {
+ *is_negative = FALSE;
+ }
+ else {
+ *is_negative = (num < 0);
+
+ /*
+ * On a 2's complement machine, negating the most negative integer
+ * results in a number that cannot be represented as a signed integer.
+ * Here is what we do to obtain the number's magnitude:
+ * a. add 1 to the number
+ * b. negate it (becomes positive)
+ * c. convert it to unsigned
+ * d. add 1
+ */
+ if (*is_negative) {
+ apr_int64_t t = num + 1;
+ magnitude = ((apr_uint64_t) -t) + 1;
+ }
+ }
+
+ /*
+ * We use a do-while loop so that we write at least 1 digit
+ */
+ do {
+ apr_uint64_t new_magnitude = magnitude / 10;
+
+ *--p = (char) (magnitude - new_magnitude * 10 + '0');
+ magnitude = new_magnitude;
+ }
+ while (magnitude);
+
+ *len = buf_end - p;
+ return (p);
+}
+
+static char *conv_in_addr(struct in_addr *ia, char *buf_end, apr_size_t *len)
+{
+ unsigned addr = ntohl(ia->s_addr);
+ char *p = buf_end;
+ int is_negative;
+ apr_size_t sub_len;
+
+ p = conv_10((addr & 0x000000FF) , TRUE, &is_negative, p, &sub_len);
+ *--p = '.';
+ p = conv_10((addr & 0x0000FF00) >> 8, TRUE, &is_negative, p, &sub_len);
+ *--p = '.';
+ p = conv_10((addr & 0x00FF0000) >> 16, TRUE, &is_negative, p, &sub_len);
+ *--p = '.';
+ p = conv_10((addr & 0xFF000000) >> 24, TRUE, &is_negative, p, &sub_len);
+
+ *len = buf_end - p;
+ return (p);
+}
+
+
+/* Must be passed a buffer of size NUM_BUF_SIZE where buf_end points
+ * to 1 byte past the end of the buffer. */
+static char *conv_apr_sockaddr(apr_sockaddr_t *sa, char *buf_end, apr_size_t *len)
+{
+ char *p = buf_end;
+ int is_negative;
+ apr_size_t sub_len;
+ char *ipaddr_str;
+
+ p = conv_10(sa->port, TRUE, &is_negative, p, &sub_len);
+ *--p = ':';
+ ipaddr_str = buf_end - NUM_BUF_SIZE;
+ if (apr_sockaddr_ip_getbuf(ipaddr_str, sa->addr_str_len, sa)) {
+ /* Should only fail if the buffer is too small, which it
+ * should not be; but fail safe anyway: */
+ *--p = '?';
+ *len = buf_end - p;
+ return p;
+ }
+ sub_len = strlen(ipaddr_str);
+#if APR_HAVE_IPV6
+ if (sa->family == APR_INET6 &&
+ !IN6_IS_ADDR_V4MAPPED(&sa->sa.sin6.sin6_addr)) {
+ *(p - 1) = ']';
+ p -= sub_len + 2;
+ *p = '[';
+ memcpy(p + 1, ipaddr_str, sub_len);
+ }
+ else
+#endif
+ {
+ p -= sub_len;
+ memcpy(p, ipaddr_str, sub_len);
+ }
+
+ *len = buf_end - p;
+ return (p);
+}
+
+
+
+#if APR_HAS_THREADS
+static char *conv_os_thread_t(apr_os_thread_t *tid, char *buf_end, apr_size_t *len)
+{
+ union {
+ apr_os_thread_t tid;
+ apr_uint64_t u64;
+ apr_uint32_t u32;
+ } u;
+ int is_negative;
+
+ u.tid = *tid;
+ switch(sizeof(u.tid)) {
+ case sizeof(apr_int32_t):
+ return conv_10(u.u32, TRUE, &is_negative, buf_end, len);
+ case sizeof(apr_int64_t):
+ return conv_10_quad(u.u64, TRUE, &is_negative, buf_end, len);
+ default:
+ /* not implemented; stick 0 in the buffer */
+ return conv_10(0, TRUE, &is_negative, buf_end, len);
+ }
+}
+#endif
+
+
+
+/*
+ * Convert a floating point number to a string formats 'f', 'e' or 'E'.
+ * The result is placed in buf, and len denotes the length of the string
+ * The sign is returned in the is_negative argument (and is not placed
+ * in buf).
+ */
+static char *conv_fp(register char format, register double num,
+ boolean_e add_dp, int precision, int *is_negative,
+ char *buf, apr_size_t *len)
+{
+ register char *s = buf;
+ register char *p;
+ int decimal_point;
+ char buf1[NDIG];
+
+ if (format == 'f')
+ p = apr_fcvt(num, precision, &decimal_point, is_negative, buf1);
+ else /* either e or E format */
+ p = apr_ecvt(num, precision + 1, &decimal_point, is_negative, buf1);
+
+ /*
+ * Check for Infinity and NaN
+ */
+ if (apr_isalpha(*p)) {
+ *len = strlen(p);
+ memcpy(buf, p, *len + 1);
+ *is_negative = FALSE;
+ return (buf);
+ }
+
+ if (format == 'f') {
+ if (decimal_point <= 0) {
+ *s++ = '0';
+ if (precision > 0) {
+ *s++ = '.';
+ while (decimal_point++ < 0)
+ *s++ = '0';
+ }
+ else if (add_dp)
+ *s++ = '.';
+ }
+ else {
+ while (decimal_point-- > 0)
+ *s++ = *p++;
+ if (precision > 0 || add_dp)
+ *s++ = '.';
+ }
+ }
+ else {
+ *s++ = *p++;
+ if (precision > 0 || add_dp)
+ *s++ = '.';
+ }
+
+ /*
+ * copy the rest of p, the NUL is NOT copied
+ */
+ while (*p)
+ *s++ = *p++;
+
+ if (format != 'f') {
+ char temp[EXPONENT_LENGTH]; /* for exponent conversion */
+ apr_size_t t_len;
+ int exponent_is_negative;
+
+ *s++ = format; /* either e or E */
+ decimal_point--;
+ if (decimal_point != 0) {
+ p = conv_10((apr_int32_t) decimal_point, FALSE, &exponent_is_negative,
+ &temp[EXPONENT_LENGTH], &t_len);
+ *s++ = exponent_is_negative ? '-' : '+';
+
+ /*
+ * Make sure the exponent has at least 2 digits
+ */
+ if (t_len == 1)
+ *s++ = '0';
+ while (t_len--)
+ *s++ = *p++;
+ }
+ else {
+ *s++ = '+';
+ *s++ = '0';
+ *s++ = '0';
+ }
+ }
+
+ *len = s - buf;
+ return (buf);
+}
+
+
+/*
+ * Convert num to a base X number where X is a power of 2. nbits determines X.
+ * For example, if nbits is 3, we do base 8 conversion
+ * Return value:
+ * a pointer to a string containing the number
+ *
+ * The caller provides a buffer for the string: that is the buf_end argument
+ * which is a pointer to the END of the buffer + 1 (i.e. if the buffer
+ * is declared as buf[ 100 ], buf_end should be &buf[ 100 ])
+ *
+ * As with conv_10, we have a faster version which is used when
+ * the number isn't quad size.
+ */
+static char *conv_p2(register apr_uint32_t num, register int nbits,
+ char format, char *buf_end, register apr_size_t *len)
+{
+ register int mask = (1 << nbits) - 1;
+ register char *p = buf_end;
+ static const char low_digits[] = "0123456789abcdef";
+ static const char upper_digits[] = "0123456789ABCDEF";
+ register const char *digits = (format == 'X') ? upper_digits : low_digits;
+
+ do {
+ *--p = digits[num & mask];
+ num >>= nbits;
+ }
+ while (num);
+
+ *len = buf_end - p;
+ return (p);
+}
+
+static char *conv_p2_quad(apr_uint64_t num, register int nbits,
+ char format, char *buf_end, register apr_size_t *len)
+{
+ register int mask = (1 << nbits) - 1;
+ register char *p = buf_end;
+ static const char low_digits[] = "0123456789abcdef";
+ static const char upper_digits[] = "0123456789ABCDEF";
+ register const char *digits = (format == 'X') ? upper_digits : low_digits;
+
+ if (num <= APR_UINT32_MAX)
+ return(conv_p2((apr_uint32_t)num, nbits, format, buf_end, len));
+
+ do {
+ *--p = digits[num & mask];
+ num >>= nbits;
+ }
+ while (num);
+
+ *len = buf_end - p;
+ return (p);
+}
+
+#if APR_HAS_THREADS
+static char *conv_os_thread_t_hex(apr_os_thread_t *tid, char *buf_end, apr_size_t *len)
+{
+ union {
+ apr_os_thread_t tid;
+ apr_uint64_t u64;
+ apr_uint32_t u32;
+ } u;
+ int is_negative;
+
+ u.tid = *tid;
+ switch(sizeof(u.tid)) {
+ case sizeof(apr_int32_t):
+ return conv_p2(u.u32, 4, 'x', buf_end, len);
+ case sizeof(apr_int64_t):
+ return conv_p2_quad(u.u64, 4, 'x', buf_end, len);
+ default:
+ /* not implemented; stick 0 in the buffer */
+ return conv_10(0, TRUE, &is_negative, buf_end, len);
+ }
+}
+#endif
+
+/*
+ * Do format conversion placing the output in buffer
+ */
+APR_DECLARE(int) apr_vformatter(int (*flush_func)(apr_vformatter_buff_t *),
+ apr_vformatter_buff_t *vbuff, const char *fmt, va_list ap)
+{
+ register char *sp;
+ register char *bep;
+ register int cc = 0;
+ register apr_size_t i;
+
+ register char *s = NULL;
+ char *q;
+ apr_size_t s_len = 0;
+
+ register apr_size_t min_width = 0;
+ apr_size_t precision = 0;
+ enum {
+ LEFT, RIGHT
+ } adjust;
+ char pad_char;
+ char prefix_char;
+
+ double fp_num;
+ apr_int64_t i_quad = 0;
+ apr_uint64_t ui_quad;
+ apr_int32_t i_num = 0;
+ apr_uint32_t ui_num = 0;
+
+ char num_buf[NUM_BUF_SIZE];
+ char char_buf[2]; /* for printing %% and %<unknown> */
+
+ enum var_type_enum {
+ IS_QUAD, IS_LONG, IS_SHORT, IS_INT
+ };
+ enum var_type_enum var_type = IS_INT;
+
+ /*
+ * Flag variables
+ */
+ boolean_e alternate_form;
+ boolean_e print_sign;
+ boolean_e print_blank;
+ boolean_e adjust_precision;
+ boolean_e adjust_width;
+ int is_negative;
+
+ sp = vbuff->curpos;
+ bep = vbuff->endpos;
+
+ while (*fmt) {
+ if (*fmt != '%') {
+ INS_CHAR(*fmt, sp, bep, cc);
+ }
+ else {
+ /*
+ * Default variable settings
+ */
+ boolean_e print_something = YES;
+ adjust = RIGHT;
+ alternate_form = print_sign = print_blank = NO;
+ pad_char = ' ';
+ prefix_char = NUL;
+
+ fmt++;
+
+ /*
+ * Try to avoid checking for flags, width or precision
+ */
+ if (!apr_islower(*fmt)) {
+ /*
+ * Recognize flags: -, #, BLANK, +
+ */
+ for (;; fmt++) {
+ if (*fmt == '-')
+ adjust = LEFT;
+ else if (*fmt == '+')
+ print_sign = YES;
+ else if (*fmt == '#')
+ alternate_form = YES;
+ else if (*fmt == ' ')
+ print_blank = YES;
+ else if (*fmt == '0')
+ pad_char = '0';
+ else
+ break;
+ }
+
+ /*
+ * Check if a width was specified
+ */
+ if (apr_isdigit(*fmt)) {
+ STR_TO_DEC(fmt, min_width);
+ adjust_width = YES;
+ }
+ else if (*fmt == '*') {
+ int v = va_arg(ap, int);
+ fmt++;
+ adjust_width = YES;
+ if (v < 0) {
+ adjust = LEFT;
+ min_width = (apr_size_t)(-v);
+ }
+ else
+ min_width = (apr_size_t)v;
+ }
+ else
+ adjust_width = NO;
+
+ /*
+ * Check if a precision was specified
+ */
+ if (*fmt == '.') {
+ adjust_precision = YES;
+ fmt++;
+ if (apr_isdigit(*fmt)) {
+ STR_TO_DEC(fmt, precision);
+ }
+ else if (*fmt == '*') {
+ int v = va_arg(ap, int);
+ fmt++;
+ precision = (v < 0) ? 0 : (apr_size_t)v;
+ }
+ else
+ precision = 0;
+ }
+ else
+ adjust_precision = NO;
+ }
+ else
+ adjust_precision = adjust_width = NO;
+
+ /*
+ * Modifier check. In same cases, APR_OFF_T_FMT can be
+ * "lld" and APR_INT64_T_FMT can be "ld" (that is, off_t is
+ * "larger" than int64). Check that case 1st.
+ * Note that if APR_OFF_T_FMT is "d",
+ * the first if condition is never true. If APR_INT64_T_FMT
+ * is "d' then the second if condition is never true.
+ */
+ if ((sizeof(APR_OFF_T_FMT) > sizeof(APR_INT64_T_FMT)) &&
+ ((sizeof(APR_OFF_T_FMT) == 4 &&
+ fmt[0] == APR_OFF_T_FMT[0] &&
+ fmt[1] == APR_OFF_T_FMT[1]) ||
+ (sizeof(APR_OFF_T_FMT) == 3 &&
+ fmt[0] == APR_OFF_T_FMT[0]) ||
+ (sizeof(APR_OFF_T_FMT) > 4 &&
+ strncmp(fmt, APR_OFF_T_FMT,
+ sizeof(APR_OFF_T_FMT) - 2) == 0))) {
+ /* Need to account for trailing 'd' and null in sizeof() */
+ var_type = IS_QUAD;
+ fmt += (sizeof(APR_OFF_T_FMT) - 2);
+ }
+ else if ((sizeof(APR_INT64_T_FMT) == 4 &&
+ fmt[0] == APR_INT64_T_FMT[0] &&
+ fmt[1] == APR_INT64_T_FMT[1]) ||
+ (sizeof(APR_INT64_T_FMT) == 3 &&
+ fmt[0] == APR_INT64_T_FMT[0]) ||
+ (sizeof(APR_INT64_T_FMT) > 4 &&
+ strncmp(fmt, APR_INT64_T_FMT,
+ sizeof(APR_INT64_T_FMT) - 2) == 0)) {
+ /* Need to account for trailing 'd' and null in sizeof() */
+ var_type = IS_QUAD;
+ fmt += (sizeof(APR_INT64_T_FMT) - 2);
+ }
+ else if (*fmt == 'q') {
+ var_type = IS_QUAD;
+ fmt++;
+ }
+ else if (*fmt == 'l') {
+ var_type = IS_LONG;
+ fmt++;
+ }
+ else if (*fmt == 'h') {
+ var_type = IS_SHORT;
+ fmt++;
+ }
+ else {
+ var_type = IS_INT;
+ }
+
+ /*
+ * Argument extraction and printing.
+ * First we determine the argument type.
+ * Then, we convert the argument to a string.
+ * On exit from the switch, s points to the string that
+ * must be printed, s_len has the length of the string
+ * The precision requirements, if any, are reflected in s_len.
+ *
+ * NOTE: pad_char may be set to '0' because of the 0 flag.
+ * It is reset to ' ' by non-numeric formats
+ */
+ switch (*fmt) {
+ case 'u':
+ if (var_type == IS_QUAD) {
+ i_quad = va_arg(ap, apr_uint64_t);
+ s = conv_10_quad(i_quad, 1, &is_negative,
+ &num_buf[NUM_BUF_SIZE], &s_len);
+ }
+ else {
+ if (var_type == IS_LONG)
+ i_num = (apr_int32_t) va_arg(ap, apr_uint32_t);
+ else if (var_type == IS_SHORT)
+ i_num = (apr_int32_t) (unsigned short) va_arg(ap, unsigned int);
+ else
+ i_num = (apr_int32_t) va_arg(ap, unsigned int);
+ s = conv_10(i_num, 1, &is_negative,
+ &num_buf[NUM_BUF_SIZE], &s_len);
+ }
+ FIX_PRECISION(adjust_precision, precision, s, s_len);
+ break;
+
+ case 'd':
+ case 'i':
+ if (var_type == IS_QUAD) {
+ i_quad = va_arg(ap, apr_int64_t);
+ s = conv_10_quad(i_quad, 0, &is_negative,
+ &num_buf[NUM_BUF_SIZE], &s_len);
+ }
+ else {
+ if (var_type == IS_LONG)
+ i_num = va_arg(ap, apr_int32_t);
+ else if (var_type == IS_SHORT)
+ i_num = (short) va_arg(ap, int);
+ else
+ i_num = va_arg(ap, int);
+ s = conv_10(i_num, 0, &is_negative,
+ &num_buf[NUM_BUF_SIZE], &s_len);
+ }
+ FIX_PRECISION(adjust_precision, precision, s, s_len);
+
+ if (is_negative)
+ prefix_char = '-';
+ else if (print_sign)
+ prefix_char = '+';
+ else if (print_blank)
+ prefix_char = ' ';
+ break;
+
+
+ case 'o':
+ if (var_type == IS_QUAD) {
+ ui_quad = va_arg(ap, apr_uint64_t);
+ s = conv_p2_quad(ui_quad, 3, *fmt,
+ &num_buf[NUM_BUF_SIZE], &s_len);
+ }
+ else {
+ if (var_type == IS_LONG)
+ ui_num = va_arg(ap, apr_uint32_t);
+ else if (var_type == IS_SHORT)
+ ui_num = (unsigned short) va_arg(ap, unsigned int);
+ else
+ ui_num = va_arg(ap, unsigned int);
+ s = conv_p2(ui_num, 3, *fmt,
+ &num_buf[NUM_BUF_SIZE], &s_len);
+ }
+ FIX_PRECISION(adjust_precision, precision, s, s_len);
+ if (alternate_form && *s != '0') {
+ *--s = '0';
+ s_len++;
+ }
+ break;
+
+
+ case 'x':
+ case 'X':
+ if (var_type == IS_QUAD) {
+ ui_quad = va_arg(ap, apr_uint64_t);
+ s = conv_p2_quad(ui_quad, 4, *fmt,
+ &num_buf[NUM_BUF_SIZE], &s_len);
+ }
+ else {
+ if (var_type == IS_LONG)
+ ui_num = va_arg(ap, apr_uint32_t);
+ else if (var_type == IS_SHORT)
+ ui_num = (unsigned short) va_arg(ap, unsigned int);
+ else
+ ui_num = va_arg(ap, unsigned int);
+ s = conv_p2(ui_num, 4, *fmt,
+ &num_buf[NUM_BUF_SIZE], &s_len);
+ }
+ FIX_PRECISION(adjust_precision, precision, s, s_len);
+ if (alternate_form && ui_num != 0) {
+ *--s = *fmt; /* 'x' or 'X' */
+ *--s = '0';
+ s_len += 2;
+ }
+ break;
+
+
+ case 's':
+ s = va_arg(ap, char *);
+ if (s != NULL) {
+ if (!adjust_precision) {
+ s_len = strlen(s);
+ }
+ else {
+ /* From the C library standard in section 7.9.6.1:
+ * ...if the precision is specified, no more then
+ * that many characters are written. If the
+ * precision is not specified or is greater
+ * than the size of the array, the array shall
+ * contain a null character.
+ *
+ * My reading is is precision is specified and
+ * is less then or equal to the size of the
+ * array, no null character is required. So
+ * we can't do a strlen.
+ *
+ * This figures out the length of the string
+ * up to the precision. Once it's long enough
+ * for the specified precision, we don't care
+ * anymore.
+ *
+ * NOTE: you must do the length comparison
+ * before the check for the null character.
+ * Otherwise, you'll check one beyond the
+ * last valid character.
+ */
+ const char *walk;
+
+ for (walk = s, s_len = 0;
+ (s_len < precision) && (*walk != '\0');
+ ++walk, ++s_len);
+ }
+ }
+ else {
+ s = S_NULL;
+ s_len = S_NULL_LEN;
+ }
+ pad_char = ' ';
+ break;
+
+
+ case 'f':
+ case 'e':
+ case 'E':
+ fp_num = va_arg(ap, double);
+ /*
+ * We use &num_buf[ 1 ], so that we have room for the sign
+ */
+ s = NULL;
+#ifdef HAVE_ISNAN
+ if (isnan(fp_num)) {
+ s = "nan";
+ s_len = 3;
+ }
+#endif
+#ifdef HAVE_ISINF
+ if (!s && isinf(fp_num)) {
+ s = "inf";
+ s_len = 3;
+ }
+#endif
+ if (!s) {
+ s = conv_fp(*fmt, fp_num, alternate_form,
+ (int)((adjust_precision == NO) ? FLOAT_DIGITS : precision),
+ &is_negative, &num_buf[1], &s_len);
+ if (is_negative)
+ prefix_char = '-';
+ else if (print_sign)
+ prefix_char = '+';
+ else if (print_blank)
+ prefix_char = ' ';
+ }
+ break;
+
+
+ case 'g':
+ case 'G':
+ if (adjust_precision == NO)
+ precision = FLOAT_DIGITS;
+ else if (precision == 0)
+ precision = 1;
+ /*
+ * * We use &num_buf[ 1 ], so that we have room for the sign
+ */
+ s = apr_gcvt(va_arg(ap, double), (int) precision, &num_buf[1],
+ alternate_form);
+ if (*s == '-')
+ prefix_char = *s++;
+ else if (print_sign)
+ prefix_char = '+';
+ else if (print_blank)
+ prefix_char = ' ';
+
+ s_len = strlen(s);
+
+ if (alternate_form && (q = strchr(s, '.')) == NULL) {
+ s[s_len++] = '.';
+ s[s_len] = '\0'; /* delimit for following strchr() */
+ }
+ if (*fmt == 'G' && (q = strchr(s, 'e')) != NULL)
+ *q = 'E';
+ break;
+
+
+ case 'c':
+ char_buf[0] = (char) (va_arg(ap, int));
+ s = &char_buf[0];
+ s_len = 1;
+ pad_char = ' ';
+ break;
+
+
+ case '%':
+ char_buf[0] = '%';
+ s = &char_buf[0];
+ s_len = 1;
+ pad_char = ' ';
+ break;
+
+
+ case 'n':
+ if (var_type == IS_QUAD)
+ *(va_arg(ap, apr_int64_t *)) = cc;
+ else if (var_type == IS_LONG)
+ *(va_arg(ap, long *)) = cc;
+ else if (var_type == IS_SHORT)
+ *(va_arg(ap, short *)) = cc;
+ else
+ *(va_arg(ap, int *)) = cc;
+ print_something = NO;
+ break;
+
+ /*
+ * This is where we extend the printf format, with a second
+ * type specifier
+ */
+ case 'p':
+ switch(*++fmt) {
+ /*
+ * If the pointer size is equal to or smaller than the size
+ * of the largest unsigned int, we convert the pointer to a
+ * hex number, otherwise we print "%p" to indicate that we
+ * don't handle "%p".
+ */
+ case 'p':
+#if APR_SIZEOF_VOIDP == 8
+ if (sizeof(void *) <= sizeof(apr_uint64_t)) {
+ ui_quad = (apr_uint64_t) va_arg(ap, void *);
+ s = conv_p2_quad(ui_quad, 4, 'x',
+ &num_buf[NUM_BUF_SIZE], &s_len);
+ }
+#else
+ if (sizeof(void *) <= sizeof(apr_uint32_t)) {
+ ui_num = (apr_uint32_t) va_arg(ap, void *);
+ s = conv_p2(ui_num, 4, 'x',
+ &num_buf[NUM_BUF_SIZE], &s_len);
+ }
+#endif
+ else {
+ s = "%p";
+ s_len = 2;
+ prefix_char = NUL;
+ }
+ pad_char = ' ';
+ break;
+
+ /* print an apr_sockaddr_t as a.b.c.d:port */
+ case 'I':
+ {
+ apr_sockaddr_t *sa;
+
+ sa = va_arg(ap, apr_sockaddr_t *);
+ if (sa != NULL) {
+ s = conv_apr_sockaddr(sa, &num_buf[NUM_BUF_SIZE], &s_len);
+ if (adjust_precision && precision < s_len)
+ s_len = precision;
+ }
+ else {
+ s = S_NULL;
+ s_len = S_NULL_LEN;
+ }
+ pad_char = ' ';
+ }
+ break;
+
+ /* print a struct in_addr as a.b.c.d */
+ case 'A':
+ {
+ struct in_addr *ia;
+
+ ia = va_arg(ap, struct in_addr *);
+ if (ia != NULL) {
+ s = conv_in_addr(ia, &num_buf[NUM_BUF_SIZE], &s_len);
+ if (adjust_precision && precision < s_len)
+ s_len = precision;
+ }
+ else {
+ s = S_NULL;
+ s_len = S_NULL_LEN;
+ }
+ pad_char = ' ';
+ }
+ break;
+
+ /* print the error for an apr_status_t */
+ case 'm':
+ {
+ apr_status_t *mrv;
+
+ mrv = va_arg(ap, apr_status_t *);
+ if (mrv != NULL) {
+ s = apr_strerror(*mrv, num_buf, NUM_BUF_SIZE-1);
+ s_len = strlen(s);
+ }
+ else {
+ s = S_NULL;
+ s_len = S_NULL_LEN;
+ }
+ pad_char = ' ';
+ }
+ break;
+
+ case 'T':
+#if APR_HAS_THREADS
+ {
+ apr_os_thread_t *tid;
+
+ tid = va_arg(ap, apr_os_thread_t *);
+ if (tid != NULL) {
+ s = conv_os_thread_t(tid, &num_buf[NUM_BUF_SIZE], &s_len);
+ if (adjust_precision && precision < s_len)
+ s_len = precision;
+ }
+ else {
+ s = S_NULL;
+ s_len = S_NULL_LEN;
+ }
+ pad_char = ' ';
+ }
+#else
+ char_buf[0] = '0';
+ s = &char_buf[0];
+ s_len = 1;
+ pad_char = ' ';
+#endif
+ break;
+
+ case 't':
+#if APR_HAS_THREADS
+ {
+ apr_os_thread_t *tid;
+
+ tid = va_arg(ap, apr_os_thread_t *);
+ if (tid != NULL) {
+ s = conv_os_thread_t_hex(tid, &num_buf[NUM_BUF_SIZE], &s_len);
+ if (adjust_precision && precision < s_len)
+ s_len = precision;
+ }
+ else {
+ s = S_NULL;
+ s_len = S_NULL_LEN;
+ }
+ pad_char = ' ';
+ }
+#else
+ char_buf[0] = '0';
+ s = &char_buf[0];
+ s_len = 1;
+ pad_char = ' ';
+#endif
+ break;
+
+ case 'B':
+ case 'F':
+ case 'S':
+ {
+ char buf[5];
+ apr_off_t size = 0;
+
+ if (*fmt == 'B') {
+ apr_uint32_t *arg = va_arg(ap, apr_uint32_t *);
+ size = (arg) ? *arg : 0;
+ }
+ else if (*fmt == 'F') {
+ apr_off_t *arg = va_arg(ap, apr_off_t *);
+ size = (arg) ? *arg : 0;
+ }
+ else {
+ apr_size_t *arg = va_arg(ap, apr_size_t *);
+ size = (arg) ? *arg : 0;
+ }
+
+ s = apr_strfsize(size, buf);
+ s_len = strlen(s);
+ pad_char = ' ';
+ }
+ break;
+
+ case NUL:
+ /* if %p ends the string, oh well ignore it */
+ continue;
+
+ default:
+ s = "bogus %p";
+ s_len = 8;
+ prefix_char = NUL;
+ (void)va_arg(ap, void *); /* skip the bogus argument on the stack */
+ break;
+ }
+ break;
+
+ case NUL:
+ /*
+ * The last character of the format string was %.
+ * We ignore it.
+ */
+ continue;
+
+
+ /*
+ * The default case is for unrecognized %'s.
+ * We print %<char> to help the user identify what
+ * option is not understood.
+ * This is also useful in case the user wants to pass
+ * the output of format_converter to another function
+ * that understands some other %<char> (like syslog).
+ * Note that we can't point s inside fmt because the
+ * unknown <char> could be preceded by width etc.
+ */
+ default:
+ char_buf[0] = '%';
+ char_buf[1] = *fmt;
+ s = char_buf;
+ s_len = 2;
+ pad_char = ' ';
+ break;
+ }
+
+ if (prefix_char != NUL && s != S_NULL && s != char_buf) {
+ *--s = prefix_char;
+ s_len++;
+ }
+
+ if (adjust_width && adjust == RIGHT && min_width > s_len) {
+ if (pad_char == '0' && prefix_char != NUL) {
+ INS_CHAR(*s, sp, bep, cc);
+ s++;
+ s_len--;
+ min_width--;
+ }
+ PAD(min_width, s_len, pad_char);
+ }
+
+ /*
+ * Print the string s.
+ */
+ if (print_something == YES) {
+ for (i = s_len; i != 0; i--) {
+ INS_CHAR(*s, sp, bep, cc);
+ s++;
+ }
+ }
+
+ if (adjust_width && adjust == LEFT && min_width > s_len)
+ PAD(min_width, s_len, pad_char);
+ }
+ fmt++;
+ }
+ vbuff->curpos = sp;
+
+ return cc;
+}
+
+
+static int snprintf_flush(apr_vformatter_buff_t *vbuff)
+{
+ /* if the buffer fills we have to abort immediately, there is no way
+ * to "flush" an apr_snprintf... there's nowhere to flush it to.
+ */
+ return -1;
+}
+
+
+APR_DECLARE_NONSTD(int) apr_snprintf(char *buf, apr_size_t len,
+ const char *format, ...)
+{
+ int cc;
+ va_list ap;
+ apr_vformatter_buff_t vbuff;
+
+ if (len == 0) {
+ /* NOTE: This is a special case; we just want to return the number
+ * of chars that would be written (minus \0) if the buffer
+ * size was infinite. We leverage the fact that INS_CHAR
+ * just does actual inserts iff the buffer pointer is non-NULL.
+ * In this case, we don't care what buf is; it can be NULL, since
+ * we don't touch it at all.
+ */
+ vbuff.curpos = NULL;
+ vbuff.endpos = NULL;
+ } else {
+ /* save one byte for nul terminator */
+ vbuff.curpos = buf;
+ vbuff.endpos = buf + len - 1;
+ }
+ va_start(ap, format);
+ cc = apr_vformatter(snprintf_flush, &vbuff, format, ap);
+ va_end(ap);
+ if (len != 0) {
+ *vbuff.curpos = '\0';
+ }
+ return (cc == -1) ? (int)len - 1 : cc;
+}
+
+
+APR_DECLARE(int) apr_vsnprintf(char *buf, apr_size_t len, const char *format,
+ va_list ap)
+{
+ int cc;
+ apr_vformatter_buff_t vbuff;
+
+ if (len == 0) {
+ /* See above note */
+ vbuff.curpos = NULL;
+ vbuff.endpos = NULL;
+ } else {
+ /* save one byte for nul terminator */
+ vbuff.curpos = buf;
+ vbuff.endpos = buf + len - 1;
+ }
+ cc = apr_vformatter(snprintf_flush, &vbuff, format, ap);
+ if (len != 0) {
+ *vbuff.curpos = '\0';
+ }
+ return (cc == -1) ? (int)len - 1 : cc;
+}
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