--- /dev/null
+/*
+ * snprintf.c - a portable implementation of snprintf
+ *
+ * AUTHOR
+ * Mark Martinec <mark.martinec@ijs.si>, April 1999.
+ *
+ * Copyright 1999, Mark Martinec. All rights reserved.
+ *
+ * TERMS AND CONDITIONS
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the "Frontier Artistic License" which comes
+ * with this Kit.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the Frontier Artistic License for more details.
+ *
+ * You should have received a copy of the Frontier Artistic License
+ * with this Kit in the file named LICENSE.txt .
+ * If not, I'll be glad to provide one.
+ *
+ * FEATURES
+ * - careful adherence to specs regarding flags, field width and precision;
+ * - good performance for large string handling (large format, large
+ * argument or large paddings). Performance is similar to system's sprintf
+ * and in several cases significantly better (make sure you compile with
+ * optimizations turned on, tell the compiler the code is strict ANSI
+ * if necessary to give it more freedom for optimizations);
+ * - return value semantics as per ISO C9X;
+ * - written in standard ISO/ANSI C - requires an ANSI C compiler.
+ *
+ * SUPPORTED FORMATS AND DATA TYPES
+ *
+ * This snprintf only supports format specifiers:
+ * s, c, d, o, u, x, X, p (and synonyms: i, D, U, O - see below)
+ * with flags: '-', '+', ' ', '0' and '#'.
+ * An asterisk is supported for field width as well as precision.
+ *
+ * Data type modifiers 'h' (short int), 'l' (long int)
+ * and 'll' (long long int) are supported.
+ * NOTE:
+ * If macro SNPRINTF_LONGLONG_SUPPORT is not defined (default) the
+ * data type modifier 'll' is recognized but treated the same as 'l',
+ * which may cause argument value truncation! Defining
+ * SNPRINTF_LONGLONG_SUPPORT requires that your system's sprintf also
+ * handles data type modifier 'll'. long long int is a language
+ * extension which may not be portable.
+ *
+ * Conversion of numeric data (formats d, o, u, x, X, p) with data type
+ * modifiers (none or h, l, ll) is left to the system routine sprintf,
+ * but all handling of flags, field width and precision as well as c and
+ * s formats is done very carefully by this portable routine. If a string
+ * precision (truncation) is specified (e.g. %.8s) it is guaranteed the
+ * string beyond the specified precision will not be referenced.
+ *
+ * Data type modifiers h, l and ll are ignored for c and s formats (data
+ * types wint_t and wchar_t are not supported).
+ *
+ * The following common synonyms for conversion characters are supported:
+ * - i is a synonym for d
+ * - D is a synonym for ld, explicit data type modifiers are ignored
+ * - U is a synonym for lu, explicit data type modifiers are ignored
+ * - O is a synonym for lo, explicit data type modifiers are ignored
+ *
+ * The following is specifically not supported:
+ * - flag ' (thousands' grouping character) is recognized but ignored
+ * - numeric formats: f, e, E, g, G and synonym F
+ * - data type modifier 'L' (long double) and 'q' (quad - use 'll' instead)
+ * - wide character/string formats: C, lc, S, ls
+ * - writeback of converted string length: conversion character n
+ * - the n$ specification for direct reference to n-th argument
+ * - locales
+ *
+ * It is permitted for str_m to be zero, and it is permitted to specify NULL
+ * pointer for resulting string argument if str_m is zero (as per ISO C9X).
+ *
+ * The return value is the number of characters which would be generated
+ * for the given input, excluding the trailing null. If this value
+ * is greater or equal to str_m, not all characters from the result
+ * have been stored in str. If str_m is greater than zero it is
+ * guaranteed the resulting string will be null-terminated.
+ *
+ * NOTE that this matches the ISO C9X and GNU C library 2.1,
+ * but is different from some older implementations!
+ *
+ * Routines asprintf and vasprintf return a pointer (in the ptr argument)
+ * to a buffer sufficiently large to hold the resulting string. This pointer
+ * should be passed to free(3) to release the allocated storage when it is
+ * no longer needed. If sufficient space cannot be allocated, these functions
+ * will return -1 and set ptr to be a NULL pointer. These two routines are a
+ * GNU C library extensions (glibc).
+ *
+ * Routines asnprintf and vasnprintf are similar to asprintf and vasprintf,
+ * yet, like snprintf and vsnprintf counterparts, will write at most str_m-1
+ * characters into the allocated output string, the last character in the
+ * allocated buffer then gets the terminating null. If the formatted string
+ * length (the return value) is greater than or equal to the str_m argument,
+ * the resulting string was truncated and some of the formatted characters
+ * were discarded. These routines present a handy way to limit the amount
+ * of allocated memory to some sane value.
+ *
+ * AVAILABILITY
+ * http://www.ijs.si/software/snprintf/
+ *
+ * REVISION HISTORY
+ * 1999-04 V0.9 Mark Martinec
+ * - initial version, some modifications after comparing printf
+ * man pages for Digital Unix 4.0, Solaris 2.6 and HPUX 10,
+ * and checking how Perl handles sprintf (differently!);
+ * 1999-04-09 V1.0 Mark Martinec <mark.martinec@ijs.si>
+ * - added main test program, fixed remaining inconsistencies,
+ * added optional (long long int) support;
+ * 1999-04-12 V1.1 Mark Martinec <mark.martinec@ijs.si>
+ * - support the 'p' format (pointer to void);
+ * - if a string precision is specified
+ * make sure the string beyond the specified precision
+ * will not be referenced (e.g. by strlen);
+ * 1999-04-13 V1.2 Mark Martinec <mark.martinec@ijs.si>
+ * - support synonyms %D=%ld, %U=%lu, %O=%lo;
+ * - speed up the case of long format string with few conversions;
+ * 1999-06-30 V1.3 Mark Martinec <mark.martinec@ijs.si>
+ * - fixed runaway loop (eventually crashing when str_l wraps
+ * beyond 2*31) while copying format string without
+ * conversion specifiers to a buffer that is too short
+ * (thanks to Edwin Young <edwiny@autonomy.com> for
+ * spotting the problem);
+ * - added macros PORTABLE_SNPRINTF_VERSION_(MAJOR|MINOR)
+ * to snprintf.h
+ * 2000-02-14 V2.0 (never released) Mark Martinec <mark.martinec@ijs.si>
+ * - relaxed license terms: The Artistic License now applies.
+ * You may still apply the GNU GENERAL PUBLIC LICENSE
+ * as was distributed with previous versions, if you prefer;
+ * - changed REVISION HISTORY dates to use ISO 8601 date format;
+ * - added vsnprintf (patch also independently proposed by
+ * Caolan McNamara 2000-05-04, and Keith M Willenson 2000-06-01)
+ * 2000-06-27 V2.1 Mark Martinec <mark.martinec@ijs.si>
+ * - removed POSIX check for str_m<1; value 0 for str_m is
+ * allowed by ISO C9X (and GNU C library 2.1) - (pointed out
+ * on 2000-05-04 by Caolan McNamara, caolan@ csn dot ul dot ie).
+ * Besides relaxed license this change in standards adherence
+ * is the main reason to bump up the major version number;
+ * - added nonstandard routines asnprintf, vasnprintf, asprintf,
+ * vasprintf that dynamically allocate storage for the
+ * resulting string; these routines are not compiled by default,
+ * see comments where NEED_V?ASN?PRINTF macros are defined;
+ * - autoconf contributed by Caolan McNamara
+ */
+
+
+/* Define HAVE_SNPRINTF if your system already has snprintf and vsnprintf.
+ *
+ * If HAVE_SNPRINTF is defined this module will not produce code for
+ * snprintf and vsnprintf, unless PREFER_PORTABLE_SNPRINTF is defined as well,
+ * causing this portable version of snprintf to be called portable_snprintf
+ * (and portable_vsnprintf).
+ */
+/* #define HAVE_SNPRINTF */
+
+/* Define PREFER_PORTABLE_SNPRINTF if your system does have snprintf and
+ * vsnprintf but you would prefer to use the portable routine(s) instead.
+ * In this case the portable routine is declared as portable_snprintf
+ * (and portable_vsnprintf) and a macro 'snprintf' (and 'vsnprintf')
+ * is defined to expand to 'portable_v?snprintf' - see file snprintf.h .
+ * Defining this macro is only useful if HAVE_SNPRINTF is also defined,
+ * but does does no harm if defined nevertheless.
+ */
+/* #define PREFER_PORTABLE_SNPRINTF */
+
+/* Define SNPRINTF_LONGLONG_SUPPORT if you want to support
+ * data type (long long int) and data type modifier 'll' (e.g. %lld).
+ * If undefined, 'll' is recognized but treated as a single 'l'.
+ *
+ * If the system's sprintf does not handle 'll'
+ * the SNPRINTF_LONGLONG_SUPPORT must not be defined!
+ *
+ * This is off by default since (long long int) is a language extension.
+ */
+/* #define SNPRINTF_LONGLONG_SUPPORT */
+
+/* Define NEED_SNPRINTF_ONLY if you only need snprintf, and not vsnprintf.
+ * If NEED_SNPRINTF_ONLY is defined, the snprintf will be defined directly,
+ * otherwise both snprintf and vsnprintf routines will be defined
+ * and snprintf will be a simple wrapper around vsnprintf, at the expense
+ * of an extra procedure call.
+ */
+/* #define NEED_SNPRINTF_ONLY */
+
+/* Define NEED_V?ASN?PRINTF macros if you need library extension
+ * routines asprintf, vasprintf, asnprintf, vasnprintf respectively,
+ * and your system library does not provide them. They are all small
+ * wrapper routines around portable_vsnprintf. Defining any of the four
+ * NEED_V?ASN?PRINTF macros automatically turns off NEED_SNPRINTF_ONLY
+ * and turns on PREFER_PORTABLE_SNPRINTF.
+ *
+ * Watch for name conflicts with the system library if these routines
+ * are already present there.
+ *
+ * NOTE: vasprintf and vasnprintf routines need va_copy() from stdarg.h, as
+ * specified by C9X, to be able to traverse the same list of arguments twice.
+ * I don't know of any other standard and portable way of achieving the same.
+ * With some versions of gcc you may use __va_copy(). You might even get away
+ * with "ap2 = ap", in this case you must not call va_end(ap2) !
+ */
+/* #define NEED_ASPRINTF */
+/* #define NEED_ASNPRINTF */
+/* #define NEED_VASPRINTF */
+/* #define NEED_VASNPRINTF */
+
+
+/* Define the following macros if desired:
+ * SOLARIS_COMPATIBLE, SOLARIS_BUG_COMPATIBLE,
+ * HPUX_COMPATIBLE, HPUX_BUG_COMPATIBLE,
+ * DIGITAL_UNIX_COMPATIBLE, DIGITAL_UNIX_BUG_COMPATIBLE,
+ * PERL_COMPATIBLE, PERL_BUG_COMPATIBLE,
+ *
+ * - For portable applications it is best not to rely on peculiarities
+ * of a given implementation so it may be best not to define any
+ * of the macros that select compatibility and to avoid features
+ * that vary among the systems.
+ *
+ * - Selecting compatibility with more than one operating system
+ * is not strictly forbidden but is not recommended.
+ *
+ * - 'x'_BUG_COMPATIBLE implies 'x'_COMPATIBLE .
+ *
+ * - 'x'_COMPATIBLE refers to (and enables) a behaviour that is
+ * documented in a sprintf man page on a given operating system
+ * and actually adhered to by the system's sprintf (but not on
+ * most other operating systems). It may also refer to and enable
+ * a behaviour that is declared 'undefined' or 'implementation specific'
+ * in the man page but a given implementation behaves predictably
+ * in a certain way.
+ *
+ * - 'x'_BUG_COMPATIBLE refers to (and enables) a behaviour of system's sprintf
+ * that contradicts the sprintf man page on the same operating system.
+ *
+ * - I do not claim that the 'x'_COMPATIBLE and 'x'_BUG_COMPATIBLE
+ * conditionals take into account all idiosyncrasies of a particular
+ * implementation, there may be other incompatibilities.
+ */
+
+
+\f
+/* ============================================= */
+/* NO USER SERVICABLE PARTS FOLLOWING THIS POINT */
+/* ============================================= */
+
+#define PORTABLE_SNPRINTF_VERSION_MAJOR 2
+#define PORTABLE_SNPRINTF_VERSION_MINOR 1
+
+#if defined(NEED_ASPRINTF) || defined(NEED_ASNPRINTF) || defined(NEED_VASPRINTF) || defined(NEED_VASNPRINTF)
+# if defined(NEED_SNPRINTF_ONLY)
+# undef NEED_SNPRINTF_ONLY
+# endif
+# if !defined(PREFER_PORTABLE_SNPRINTF)
+# define PREFER_PORTABLE_SNPRINTF
+# endif
+#endif
+
+#if defined(SOLARIS_BUG_COMPATIBLE) && !defined(SOLARIS_COMPATIBLE)
+#define SOLARIS_COMPATIBLE
+#endif
+
+#if defined(HPUX_BUG_COMPATIBLE) && !defined(HPUX_COMPATIBLE)
+#define HPUX_COMPATIBLE
+#endif
+
+#if defined(DIGITAL_UNIX_BUG_COMPATIBLE) && !defined(DIGITAL_UNIX_COMPATIBLE)
+#define DIGITAL_UNIX_COMPATIBLE
+#endif
+
+#if defined(PERL_BUG_COMPATIBLE) && !defined(PERL_COMPATIBLE)
+#define PERL_COMPATIBLE
+#endif
+
+#include <sys/types.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <assert.h>
+#include <errno.h>
+
+#ifdef isdigit
+#undef isdigit
+#endif
+#define isdigit(c) ((c) >= '0' && (c) <= '9')
+
+/* prototypes */
+
+#if defined(NEED_ASPRINTF)
+int asprintf (char **ptr, const char *fmt, /*args*/ ...);
+#endif
+#if defined(NEED_VASPRINTF)
+int vasprintf (char **ptr, const char *fmt, va_list ap);
+#endif
+#if defined(NEED_ASNPRINTF)
+int asnprintf (char **ptr, size_t str_m, const char *fmt, /*args*/ ...);
+#endif
+#if defined(NEED_VASNPRINTF)
+int vasnprintf (char **ptr, size_t str_m, const char *fmt, va_list ap);
+#endif
+
+#define va_copy(ap2,ap) ap2 = ap
+
+#if defined(HAVE_SNPRINTF)
+/* declare our portable snprintf routine under name portable_snprintf */
+/* declare our portable vsnprintf routine under name portable_vsnprintf */
+#else
+/* declare our portable routines under names snprintf and vsnprintf */
+#define portable_snprintf snprintf
+#if !defined(NEED_SNPRINTF_ONLY)
+#define portable_vsnprintf vsnprintf
+#endif
+#endif
+
+#if !defined(HAVE_SNPRINTF) || defined(PREFER_PORTABLE_SNPRINTF)
+int portable_snprintf(char *str, size_t str_m, const char *fmt, /*args*/ ...);
+#if !defined(NEED_SNPRINTF_ONLY)
+int portable_vsnprintf(char *str, size_t str_m, const char *fmt, va_list ap);
+#endif
+#endif
+
+/* declarations */
+
+#if !defined(lint)
+static char credits[] = "\n\
+@(#)snprintf.c, v2.1: Mark Martinec, <mark.martinec@ijs.si>\n\
+@(#)snprintf.c, v2.1: Copyright 1999, Mark Martinec. Artistic license applies.\n\
+@(#)snprintf.c, v2.1: http://www.ijs.si/software/snprintf/\n";
+#endif
+
+#if defined(NEED_ASPRINTF)
+int asprintf(char **ptr, const char *fmt, /*args*/ ...) {
+ va_list ap;
+ size_t str_m;
+ int str_l;
+
+ *ptr = NULL;
+ va_start(ap, fmt); /* measure the required size */
+ str_l = portable_vsnprintf(NULL, (size_t) 0, fmt, ap);
+ va_end(ap);
+ assert(str_l >= 0); /* possible integer overflow if str_m > INT_MAX */
+ *ptr = (char *) malloc(str_m = (size_t)str_l + 1);
+ if (*ptr == NULL) { errno = ENOMEM; str_l = -1; }
+ else {
+ int str_l2;
+ va_start(ap, fmt);
+ str_l2 = portable_vsnprintf(*ptr, str_m, fmt, ap);
+ va_end(ap);
+ assert(str_l2 == str_l);
+ }
+ return str_l;
+}
+#endif
+
+#if defined(NEED_VASPRINTF)
+int vasprintf(char **ptr, const char *fmt, va_list ap) {
+ size_t str_m;
+ int str_l;
+
+ *ptr = NULL;
+ { va_list ap2;
+ va_copy(ap2, ap); /* don't consume the original ap, we'll need it again */
+ /* measure the required size: */
+ str_l = portable_vsnprintf(NULL, (size_t) 0, fmt, ap2);
+ va_end(ap2);
+ }
+ assert(str_l >= 0); /* possible integer overflow if str_m > INT_MAX */
+ *ptr = (char *) malloc(str_m = (size_t)str_l + 1);
+ if (*ptr == NULL) { errno = ENOMEM; str_l = -1; }
+ else {
+ int str_l2 = portable_vsnprintf(*ptr, str_m, fmt, ap);
+ assert(str_l2 == str_l);
+ }
+ return str_l;
+}
+#endif
+
+#if defined(NEED_ASNPRINTF)
+int asnprintf (char **ptr, size_t str_m, const char *fmt, /*args*/ ...) {
+ va_list ap;
+ int str_l;
+
+ *ptr = NULL;
+ va_start(ap, fmt); /* measure the required size */
+ str_l = portable_vsnprintf(NULL, (size_t) 0, fmt, ap);
+ va_end(ap);
+ assert(str_l >= 0); /* possible integer overflow if str_m > INT_MAX */
+ if ((size_t)str_l + 1 < str_m) str_m = (size_t)str_l + 1; /* truncate */
+ /* if str_m is 0, no buffer is allocated, just set *ptr to NULL */
+ if (str_m == 0) { /* not interested in resulting string, just return size */
+ } else {
+ *ptr = (char *) malloc(str_m);
+ if (*ptr == NULL) { errno = ENOMEM; str_l = -1; }
+ else {
+ int str_l2;
+ va_start(ap, fmt);
+ str_l2 = portable_vsnprintf(*ptr, str_m, fmt, ap);
+ va_end(ap);
+ assert(str_l2 == str_l);
+ }
+ }
+ return str_l;
+}
+#endif
+
+#if defined(NEED_VASNPRINTF)
+int vasnprintf (char **ptr, size_t str_m, const char *fmt, va_list ap) {
+ int str_l;
+
+ *ptr = NULL;
+ { va_list ap2;
+ va_copy(ap2, ap); /* don't consume the original ap, we'll need it again */
+ /* measure the required size: */
+ str_l = portable_vsnprintf(NULL, (size_t) 0, fmt, ap2);
+ va_end(ap2);
+ }
+ assert(str_l >= 0); /* possible integer overflow if str_m > INT_MAX */
+ if ((size_t)str_l + 1 < str_m) str_m = (size_t)str_l + 1; /* truncate */
+ /* if str_m is 0, no buffer is allocated, just set *ptr to NULL */
+ if (str_m == 0) { /* not interested in resulting string, just return size */
+ } else {
+ *ptr = (char *) malloc(str_m);
+ if (*ptr == NULL) { errno = ENOMEM; str_l = -1; }
+ else {
+ int str_l2 = portable_vsnprintf(*ptr, str_m, fmt, ap);
+ assert(str_l2 == str_l);
+ }
+ }
+ return str_l;
+}
+#endif
+
+/*
+ * If the system does have snprintf and the portable routine is not
+ * specifically required, this module produces no code for snprintf/vsnprintf.
+ */
+#if !defined(HAVE_SNPRINTF) || defined(PREFER_PORTABLE_SNPRINTF)
+
+#if !defined(NEED_SNPRINTF_ONLY)
+int portable_snprintf(char *str, size_t str_m, const char *fmt, /*args*/ ...) {
+ va_list ap;
+ int str_l;
+
+ va_start(ap, fmt);
+ str_l = portable_vsnprintf(str, str_m, fmt, ap);
+ va_end(ap);
+ return str_l;
+}
+#endif
+
+#if defined(NEED_SNPRINTF_ONLY)
+int portable_snprintf(char *str, size_t str_m, const char *fmt, /*args*/ ...) {
+#else
+int portable_vsnprintf(char *str, size_t str_m, const char *fmt, va_list ap) {
+#endif
+
+#if defined(NEED_SNPRINTF_ONLY)
+ va_list ap;
+#endif
+ size_t str_l = 0;
+ const char *p = fmt;
+
+/* In contrast with POSIX, the ISO C9X now says
+ * that str can be NULL and str_m can be 0. This is more useful. */
+/*if (str_m < 1) return -1;*/
+
+#if defined(NEED_SNPRINTF_ONLY)
+ va_start(ap, fmt);
+#endif
+ if (!p) p = "";
+ while (*p) {
+ if (*p != '%') {
+ /* if (str_l < str_m) str[str_l++] = *p++; -- this would be sufficient */
+ /* but the following code achieves better performance for cases
+ * where format string is long and contains few conversions */
+ const char *q = strchr(p+1,'%');
+ int n = !q ? strlen(p) : (q-p);
+ int avail = (int)(str_m-str_l);
+ if (avail > 0) {
+ register int k; register char *r; register const char* p1;
+ for (p1=p, r=str+str_l, k=(n>avail?avail:n); k>0; k--) *r++ = *p1++;
+ }
+ p += n; str_l += n;
+ } else {
+ const char *starting_p;
+ int min_field_width = 0, precision = 0;
+ int zero_padding = 0, precision_specified = 0, justify_left = 0;
+ int alternative_form = 0, force_sign = 0;
+ int space_for_positive = 1; /* If both the ' ' and '+' flags appear,
+ the ' ' flag should be ignored. */
+ char data_type_modifier = '\0'; /* allowed valued: \0, h, l, L, p */
+ char tmp[32];/* temporary buffer for simple numeric->string conversion */
+
+ const char *str_arg = 0;/* string address in case of string arguments */
+ int str_arg_l; /* natural field width of arg without padding and sign */
+
+ long int long_arg; /* long int argument value - always defined
+ in case of numeric arguments, regardless of data type modifiers.
+ In case of data type modifier 'll' the value is stored in long_long_arg
+ and only the sign of long_arg is guaranteed to be correct */
+ void *ptr_arg; /* pointer argument value - only defined for p format */
+ int int_arg; /* int argument value - only defined if no h or l modif.*/
+#ifdef SNPRINTF_LONGLONG_SUPPORT
+ long long int long_long_arg = 0; /* long long argument value - only
+ defined if ll modifier is present */
+#endif
+ int number_of_zeros_to_pad = 0;
+ int zero_padding_insertion_ind = 0;
+ char fmt_spec = '\0'; /* current format specifier character */
+
+ starting_p = p; p++; /* skip '%' */
+ /* parse flags */
+ while (*p == '0' || *p == '-' || *p == '+' ||
+ *p == ' ' || *p == '#' || *p == '\'') {
+ switch (*p) {
+ case '0': zero_padding = 1; break;
+ case '-': justify_left = 1; break;
+ case '+': force_sign = 1; space_for_positive = 0; break;
+ case ' ': force_sign = 1;
+ /* If both the ' ' and '+' flags appear, the ' ' flag should be ignored */
+#ifdef PERL_COMPATIBLE
+ /* ... but in Perl the last of ' ' and '+' applies */
+ space_for_positive = 1;
+#endif
+ break;
+ case '#': alternative_form = 1; break;
+ case '\'': break;
+ }
+ p++;
+ }
+ /* If the '0' and '-' flags both appear, the '0' flag should be ignored. */
+
+ /* parse field width */
+ if (*p == '*') {
+ p++; min_field_width = va_arg(ap, int);
+ if (min_field_width < 0)
+ { min_field_width = -min_field_width; justify_left = 1; }
+ } else if (isdigit((int)(*p))) {
+ min_field_width = *p++ - '0';
+ while (isdigit((int)(*p)))
+ min_field_width = 10*min_field_width + (*p++ - '0');
+ }
+ /* parse precision */
+ if (*p == '.') {
+ p++; precision_specified = 1;
+ if (*p == '*') {
+ p++; precision = va_arg(ap, int);
+ if (precision < 0) {
+ precision_specified = 0; precision = 0;
+ /* NOTE:
+ * Solaris 2.6 man page claims that in this case the precision
+ * should be set to 0. Digital Unix 4.0 and HPUX 10 man page
+ * claim that this case should be treated as unspecified precision,
+ * which is what we do here.
+ */
+ }
+ } else if (isdigit((int)(*p))) {
+ precision = *p++ - '0';
+ while (isdigit((int)(*p))) precision = 10*precision + (*p++ - '0');
+ }
+ }
+ /* parse 'h', 'l' and 'll' data type modifiers */
+ if (*p == 'h' || *p == 'l') {
+ data_type_modifier = *p; p++;
+ if (data_type_modifier == 'l' && *p == 'l') {/* double l = long long */
+#ifdef SNPRINTF_LONGLONG_SUPPORT
+ data_type_modifier = '2'; /* double l encoded as '2' */
+#else
+ data_type_modifier = 'l'; /* treat it as single 'l' */
+#endif
+ p++;
+ }
+ }
+ fmt_spec = *p;
+ /* common synonyms: */
+ switch (fmt_spec) {
+ case 'i': fmt_spec = 'd'; break;
+ case 'D': fmt_spec = 'd'; data_type_modifier = 'l'; break;
+ case 'U': fmt_spec = 'u'; data_type_modifier = 'l'; break;
+ case 'O': fmt_spec = 'o'; data_type_modifier = 'l'; break;
+ default: break;
+ }
+ /* get parameter value, do initial processing */
+ switch (fmt_spec) {
+ case '%': /* % behaves similar to 's' regarding flags and field widths */
+ case 'c': /* c behaves similar to 's' regarding flags and field widths */
+ case 's':
+ data_type_modifier = '\0'; /* wint_t and wchar_t not supported */
+ /* the result of zero padding flag with non-numeric format is undefined */
+ /* Solaris and HPUX 10 does zero padding in this case, Digital Unix not */
+#ifdef DIGITAL_UNIX_COMPATIBLE
+ zero_padding = 0; /* turn zero padding off for string formats */
+#endif
+ str_arg_l = 1;
+ switch (fmt_spec) {
+ case '%':
+ str_arg = p; break;
+ case 'c':
+ { int j = va_arg(ap, int); str_arg = (const char*) &j; }
+ break;
+ case 's':
+ str_arg = va_arg(ap, const char *);
+ if (!str_arg) str_arg_l = 0;
+ /* make sure not to address string beyond the specified precision !!! */
+ else if (!precision_specified) str_arg_l = strlen(str_arg);
+ /* truncate string if necessary as requested by precision */
+ else if (precision <= 0) str_arg_l = 0;
+ else {
+ const char *q = memchr(str_arg,'\0',(size_t)precision);
+ str_arg_l = !q ? precision : (q-str_arg);
+ }
+ break;
+ default: break;
+ }
+ break;
+ case 'd': case 'o': case 'u': case 'x': case 'X': case 'p':
+ long_arg = 0; int_arg = 0; ptr_arg = NULL;
+ if (fmt_spec == 'p') {
+ /* HPUX 10: An l, h, ll or L before any other conversion character
+ * (other than d, i, o, u, x, or X) is ignored.
+ * Digital Unix:
+ * not specified, but seems to behave as HPUX does.
+ * Solaris: If an h, l, or L appears before any other conversion
+ * specifier (other than d, i, o, u, x, or X), the behavior
+ * is undefined. (Actually %hp converts only 16-bits of address
+ * and %llp treats address as 64-bit data which is incompatible
+ * with (void *) argument on a 32-bit system).
+ */
+#ifdef SOLARIS_COMPATIBLE
+# ifdef SOLARIS_BUG_COMPATIBLE
+ /* keep data type modifiers even if it represents 'll' */
+# else
+ if (data_type_modifier == '2') data_type_modifier = '\0';
+# endif
+#else
+ data_type_modifier = '\0';
+#endif
+ ptr_arg = va_arg(ap, void *); long_arg = !ptr_arg ? 0 : 1;
+ } else {
+ switch (data_type_modifier) {
+ case '\0':
+ case 'h':
+ /* It is non-portable to specify a second argument of char or short
+ * to va_arg, because arguments seen by the called function
+ * are not char or short. C converts char and short arguments
+ * to int before passing them to a function.
+ */
+ int_arg = va_arg(ap, int); long_arg = int_arg; break;
+ case 'l':
+ long_arg = va_arg(ap, long int); break;
+#ifdef SNPRINTF_LONGLONG_SUPPORT
+ case '2':
+ long_long_arg = va_arg(ap, long long int);
+ /* only the sign of long_arg is guaranteed */
+ if (long_long_arg > 0) long_arg = +1;
+ else if (long_long_arg < 0) long_arg = -1;
+ else long_arg = 0;
+ break;
+#endif
+ }
+ }
+ str_arg = tmp; str_arg_l = 0;
+ /* NOTE:
+ * For d, i, o, u, x, and X conversions, if precision is specified,
+ * the '0' flag should be ignored. This is so with Solaris 2.6,
+ * Digital UNIX 4.0 and HPUX 10; but not with Perl.
+ */
+#ifndef PERL_COMPATIBLE
+ if (precision_specified) zero_padding = 0;
+#endif
+ if (fmt_spec == 'd') {
+ if (force_sign && long_arg >= 0)
+ tmp[str_arg_l++] = space_for_positive ? ' ' : '+';
+ /* leave negative numbers for sprintf to handle,
+ to avoid handling tricky cases like (short int)(-32768) */
+ } else if (alternative_form) {
+ if (long_arg != 0 && (fmt_spec == 'x' || fmt_spec == 'X') )
+ { tmp[str_arg_l++] = '0'; tmp[str_arg_l++] = fmt_spec; }
+#ifdef HPUX_COMPATIBLE
+ else if (fmt_spec == 'p'
+ /* HPUX 10: for an alternative form of p conversion,
+ * a nonzero result is prefixed by 0x. */
+#ifndef HPUX_BUG_COMPATIBLE
+ /* Actually it uses 0x prefix even for a zero value. */
+ && long_arg != 0
+#endif
+ ) { tmp[str_arg_l++] = '0'; tmp[str_arg_l++] = 'x'; }
+#endif
+ }
+ zero_padding_insertion_ind = str_arg_l;
+ if (!precision_specified) precision = 1; /* default precision is 1 */
+ if (precision == 0 && long_arg == 0
+#ifdef HPUX_BUG_COMPATIBLE
+ && fmt_spec != 'p'
+ /* HPUX 10 man page claims: With conversion character p the result of
+ * converting a zero value with a precision of zero is a null string.
+ * Actually it returns all zeroes. */
+#endif
+ ) { /* converted to null string */ }
+ else {
+ char f[5]; int f_l = 0;
+ f[f_l++] = '%';
+ if (!data_type_modifier) { }
+ else if (data_type_modifier=='2') { f[f_l++] = 'l'; f[f_l++] = 'l'; }
+ else f[f_l++] = data_type_modifier;
+ f[f_l++] = fmt_spec; f[f_l++] = '\0';
+ if (fmt_spec == 'p') str_arg_l+=sprintf(tmp+str_arg_l, f, ptr_arg);
+ else {
+ switch (data_type_modifier) {
+ case '\0':
+ case 'h': str_arg_l+=sprintf(tmp+str_arg_l, f, int_arg); break;
+ case 'l': str_arg_l+=sprintf(tmp+str_arg_l, f, long_arg); break;
+#ifdef SNPRINTF_LONGLONG_SUPPORT
+ case '2': str_arg_l+=sprintf(tmp+str_arg_l,f,long_long_arg); break;
+#endif
+ }
+ }
+ if (zero_padding_insertion_ind < str_arg_l &&
+ tmp[zero_padding_insertion_ind] == '-')
+ zero_padding_insertion_ind++;
+ }
+ { int num_of_digits = str_arg_l - zero_padding_insertion_ind;
+ if (alternative_form && fmt_spec == 'o'
+#ifdef HPUX_COMPATIBLE /* ("%#.o",0) -> "" */
+ && (str_arg_l > 0)
+#endif
+#ifdef DIGITAL_UNIX_BUG_COMPATIBLE /* ("%#o",0) -> "00" */
+#else
+ && !(zero_padding_insertion_ind < str_arg_l
+ && tmp[zero_padding_insertion_ind] == '0')
+#endif
+ ) { /* assure leading zero for alternative-form octal numbers */
+ if (!precision_specified || precision < num_of_digits+1)
+ { precision = num_of_digits+1; precision_specified = 1; }
+ }
+ /* zero padding to specified precision? */
+ if (num_of_digits < precision)
+ number_of_zeros_to_pad = precision - num_of_digits;
+ }
+ /* zero padding to specified minimal field width? */
+ if (!justify_left && zero_padding) {
+ int n = min_field_width - (str_arg_l+number_of_zeros_to_pad);
+ if (n > 0) number_of_zeros_to_pad += n;
+ }
+ break;
+ default: /* unrecognized format, keep format string unchanged */
+ zero_padding = 0; /* turn zero padding off for non-numeric formats */
+#ifndef DIGITAL_UNIX_COMPATIBLE
+ justify_left = 1; min_field_width = 0; /* reset flags */
+#endif
+#ifdef PERL_COMPATIBLE
+ /* keep the entire format string unchanged */
+ str_arg = starting_p; str_arg_l = p - starting_p;
+#else
+ /* discard the unrecognized format, just keep the unrecognized fmt char */
+ str_arg = p; str_arg_l = 0;
+#endif
+ if (*p) str_arg_l++; /* include invalid fmt specifier if not at EOS */
+ break;
+ }
+ if (*p) p++; /* step over the just processed format specifier */
+ /* insert padding to the left as requested by min_field_width */
+ if (!justify_left) { /* left padding with blank or zero */
+ int n = min_field_width - (str_arg_l+number_of_zeros_to_pad);
+ if (n > 0) {
+ int avail = (int)(str_m-str_l);
+ if (avail > 0) { /* memset(str+str_l, zp, (n>avail?avail:n)); */
+ const char zp = (zero_padding ? '0' : ' ');
+ register int k; register char *r;
+ for (r=str+str_l, k=(n>avail?avail:n); k>0; k--) *r++ = zp;
+ }
+ str_l += n;
+ }
+ }
+ /* zero padding as requested by the precision for numeric formats requred?*/
+ if (number_of_zeros_to_pad <= 0) {
+ /* will not copy first part of numeric here, *
+ * force it to be copied later in its entirety */
+ zero_padding_insertion_ind = 0;
+ } else {
+ /* insert first part of numerics (sign or '0x') before zero padding */
+ int n = zero_padding_insertion_ind;
+ if (n > 0) {
+ int avail = (int)(str_m-str_l);
+ if (avail > 0) memcpy(str+str_l, str_arg, (size_t)(n>avail?avail:n));
+ str_l += n;
+ }
+ /* insert zero padding as requested by the precision */
+ n = number_of_zeros_to_pad;
+ if (n > 0) {
+ int avail = (int)(str_m-str_l);
+ if (avail > 0) { /* memset(str+str_l, '0', (n>avail?avail:n)); */
+ register int k; register char *r;
+ for (r=str+str_l, k=(n>avail?avail:n); k>0; k--) *r++ = '0';
+ }
+ str_l += n;
+ }
+ }
+ /* insert formatted string (or unmodified format for unknown formats) */
+ { int n = str_arg_l - zero_padding_insertion_ind;
+ if (n > 0) {
+ int avail = (int)(str_m-str_l);
+ if (avail > 0) memcpy(str+str_l, str_arg+zero_padding_insertion_ind,
+ (size_t)(n>avail ? avail : n) );
+ str_l += n;
+ }
+ }
+ /* insert right padding */
+ if (justify_left) { /* right blank padding to the field width */
+ int n = min_field_width - (str_arg_l+number_of_zeros_to_pad);
+ if (n > 0) {
+ int avail = (int)(str_m-str_l);
+ if (avail > 0) { /* memset(str+str_l, ' ', (n>avail?avail:n)); */
+ register int k; register char *r;
+ for (r=str+str_l, k=(n>avail?avail:n); k>0; k--) *r++ = ' ';
+ }
+ str_l += n;
+ }
+ }
+ }
+ }
+#if defined(NEED_SNPRINTF_ONLY)
+ va_end(ap);
+#endif
+ if (str_m > 0) { /* make sure the string is null-terminated
+ even at the expense of overwriting the last character */
+ str[str_l <= str_m-1 ? str_l : str_m-1] = '\0';
+ }
+
+ return str_l; /* return the number of characters formatted
+ (excluding trailing null character),
+ that is, the number of characters that would have been
+ written to the buffer if it were large enough */
+}
+#endif
projects / lyx.git / commitdiff