diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:53:30 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:53:30 +0000 |
commit | 2c7cac91ed6e7db0f6937923d2b57f97dbdbc337 (patch) | |
tree | c05dc0f8e6aa3accc84e3e5cffc933ed94941383 /lib/printf/printf-pos.c | |
parent | Initial commit. (diff) | |
download | frr-upstream/8.4.4.tar.xz frr-upstream/8.4.4.zip |
Adding upstream version 8.4.4.upstream/8.4.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | lib/printf/printf-pos.c | 791 |
1 files changed, 791 insertions, 0 deletions
diff --git a/lib/printf/printf-pos.c b/lib/printf/printf-pos.c new file mode 100644 index 0000000..ac775be --- /dev/null +++ b/lib/printf/printf-pos.c @@ -0,0 +1,791 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Chris Torek. + * + * 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 University 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 REGENTS 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 REGENTS 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. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#ifdef HAVE_SYS_CDEFS_H +#include <sys/cdefs.h> +#endif + +/* + * This is the code responsible for handling positional arguments + * (%m$ and %m$.n$) for vfprintf() and vfwprintf(). + */ + +#include <sys/types.h> + +#include <limits.h> +#include <stdarg.h> +#include <stddef.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <strings.h> +#include <wchar.h> + +#include "printflocal.h" + +#ifdef NL_ARGMAX +#define MAX_POSARG NL_ARGMAX +#else +#define MAX_POSARG 65536 +#endif + +/* + * Type ids for argument type table. + */ +enum typeid { + T_UNUSED, TP_SHORT, T_INT, T_U_INT, TP_INT, + T_LONG, T_U_LONG, TP_LONG, T_LLONG, T_U_LLONG, TP_LLONG, + T_PTRDIFFT, TP_PTRDIFFT, T_SSIZET, T_SIZET, TP_SSIZET, + T_INT64T, T_UINT64T, T_INTMAXT, T_UINTMAXT, TP_INTMAXT, TP_VOID, + TP_CHAR, TP_SCHAR, T_DOUBLE, T_LONG_DOUBLE, T_WINT, TP_WCHAR +}; + +/* An expandable array of types. */ +struct typetable { + enum typeid *table; /* table of types */ + enum typeid stattable[STATIC_ARG_TBL_SIZE]; + u_int tablesize; /* current size of type table */ + u_int tablemax; /* largest used index in table */ + u_int nextarg; /* 1-based argument index */ +}; + +static int __grow_type_table(struct typetable *); +static void build_arg_table (struct typetable *, va_list, union arg **); + +/* + * Initialize a struct typetable. + */ +static inline void +inittypes(struct typetable *types) +{ + u_int n; + + types->table = types->stattable; + types->tablesize = STATIC_ARG_TBL_SIZE; + types->tablemax = 0; + types->nextarg = 1; + for (n = 0; n < STATIC_ARG_TBL_SIZE; n++) + types->table[n] = T_UNUSED; +} + +/* + * struct typetable destructor. + */ +static inline void +freetypes(struct typetable *types) +{ + + if (types->table != types->stattable) + free (types->table); +} + +/* + * Ensure that there is space to add a new argument type to the type table. + * Expand the table if necessary. Returns 0 on success. + */ +static inline int +_ensurespace(struct typetable *types) +{ + + if (types->nextarg >= types->tablesize) { + if (__grow_type_table(types)) + return -1; + } + if (types->nextarg > types->tablemax) + types->tablemax = types->nextarg; + return 0; +} + +/* + * Add an argument type to the table, expanding if necessary. + * Returns 0 on success. + */ +static inline int +addtype(struct typetable *types, enum typeid type) +{ + + if (_ensurespace(types)) + return -1; + types->table[types->nextarg++] = type; + return 0; +} + +static inline int +addsarg(struct typetable *types, int flags) +{ + + if (_ensurespace(types)) + return -1; + if (flags & LONGDBL) + types->table[types->nextarg++] = T_INT64T; + else if (flags & INTMAXT) + types->table[types->nextarg++] = T_INTMAXT; + else if (flags & SIZET) + types->table[types->nextarg++] = T_SSIZET; + else if (flags & PTRDIFFT) + types->table[types->nextarg++] = T_PTRDIFFT; + else if (flags & LLONGINT) + types->table[types->nextarg++] = T_LLONG; + else if (flags & LONGINT) + types->table[types->nextarg++] = T_LONG; + else + types->table[types->nextarg++] = T_INT; + return 0; +} + +static inline int +adduarg(struct typetable *types, int flags) +{ + + if (_ensurespace(types)) + return -1; + if (flags & LONGDBL) + types->table[types->nextarg++] = T_UINT64T; + else if (flags & INTMAXT) + types->table[types->nextarg++] = T_UINTMAXT; + else if (flags & SIZET) + types->table[types->nextarg++] = T_SIZET; + else if (flags & PTRDIFFT) + types->table[types->nextarg++] = T_SIZET; + else if (flags & LLONGINT) + types->table[types->nextarg++] = T_U_LLONG; + else if (flags & LONGINT) + types->table[types->nextarg++] = T_U_LONG; + else + types->table[types->nextarg++] = T_U_INT; + return 0; +} + +/* + * Add * arguments to the type array. + */ +static inline int +addaster(struct typetable *types, char **fmtp) +{ + char *cp; + u_int n2; + + n2 = 0; + cp = *fmtp; + while (is_digit(*cp)) { + n2 = 10 * n2 + to_digit(*cp); + cp++; + } + if (*cp == '$') { + u_int hold = types->nextarg; + types->nextarg = n2; + if (addtype(types, T_INT)) + return -1; + types->nextarg = hold; + *fmtp = ++cp; + } else { + if (addtype(types, T_INT)) + return -1; + } + return 0; +} + +#ifdef WCHAR_SUPPORT +static inline int +addwaster(struct typetable *types, wchar_t **fmtp) +{ + wchar_t *cp; + u_int n2; + + n2 = 0; + cp = *fmtp; + while (is_digit(*cp)) { + n2 = 10 * n2 + to_digit(*cp); + cp++; + } + if (*cp == '$') { + u_int hold = types->nextarg; + types->nextarg = n2; + if (addtype(types, T_INT)) + return -1; + types->nextarg = hold; + *fmtp = ++cp; + } else { + if (addtype(types, T_INT)) + return -1; + } + return 0; +} +#endif /* WCHAR_SUPPORT */ + +/* + * Find all arguments when a positional parameter is encountered. Returns a + * table, indexed by argument number, of pointers to each arguments. The + * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. + * It will be replaces with a malloc-ed one if it overflows. + * Returns 0 on success. On failure, returns nonzero and sets errno. + */ +int +_frr_find_arguments (const char *fmt0, va_list ap, union arg **argtable) +{ + char *fmt; /* format string */ + int ch; /* character from fmt */ + u_int n; /* handy integer (short term usage) */ + int error; + int flags; /* flags as above */ + struct typetable types; /* table of types */ + + fmt = (char *)fmt0; + inittypes(&types); + error = 0; + + /* + * Scan the format for conversions (`%' character). + */ + for (;;) { + while ((ch = *fmt) != '\0' && ch != '%') + fmt++; + if (ch == '\0') + goto done; + fmt++; /* skip over '%' */ + + flags = 0; + +rflag: ch = *fmt++; +reswitch: switch (ch) { + case ' ': + case '#': + goto rflag; + case '*': + if ((error = addaster(&types, &fmt))) + goto error; + goto rflag; + case '-': + case '+': + case '\'': + goto rflag; + case '.': + if ((ch = *fmt++) == '*') { + if ((error = addaster(&types, &fmt))) + goto error; + goto rflag; + } + while (is_digit(ch)) { + ch = *fmt++; + } + goto reswitch; + case '0': + goto rflag; + case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + n = 0; + do { + n = 10 * n + to_digit(ch); + /* Detect overflow */ + if (n > MAX_POSARG) { + error = -1; + goto error; + } + ch = *fmt++; + } while (is_digit(ch)); + if (ch == '$') { + types.nextarg = n; + goto rflag; + } + goto reswitch; + case 'L': + flags |= LONGDBL; + goto rflag; + case 'h': + if (flags & SHORTINT) { + flags &= ~SHORTINT; + flags |= CHARINT; + } else + flags |= SHORTINT; + goto rflag; + case 'j': + flags |= INTMAXT; + goto rflag; + case 'l': + if (flags & LONGINT) { + flags &= ~LONGINT; + flags |= LLONGINT; + } else + flags |= LONGINT; + goto rflag; + case 'q': + flags |= LLONGINT; /* not necessarily */ + goto rflag; + case 't': + flags |= PTRDIFFT; + goto rflag; + case 'z': + flags |= SIZET; + goto rflag; + case 'C': + flags |= LONGINT; + /*FALLTHROUGH*/ + case 'c': + error = addtype(&types, + (flags & LONGINT) ? T_WINT : T_INT); + if (error) + goto error; + break; + case 'D': + flags |= LONGINT; + /*FALLTHROUGH*/ + case 'd': + case 'i': + if ((error = addsarg(&types, flags))) + goto error; + break; +#ifndef NO_FLOATING_POINT + case 'a': + case 'A': + case 'e': + case 'E': + case 'f': + case 'g': + case 'G': + error = addtype(&types, + (flags & LONGDBL) ? T_LONG_DOUBLE : T_DOUBLE); + if (error) + goto error; + break; +#endif /* !NO_FLOATING_POINT */ +#ifdef DANGEROUS_PERCENT_N + case 'n': + if (flags & INTMAXT) + error = addtype(&types, TP_INTMAXT); + else if (flags & PTRDIFFT) + error = addtype(&types, TP_PTRDIFFT); + else if (flags & SIZET) + error = addtype(&types, TP_SSIZET); + else if (flags & LLONGINT) + error = addtype(&types, TP_LLONG); + else if (flags & LONGINT) + error = addtype(&types, TP_LONG); + else if (flags & SHORTINT) + error = addtype(&types, TP_SHORT); + else if (flags & CHARINT) + error = addtype(&types, TP_SCHAR); + else + error = addtype(&types, TP_INT); + if (error) + goto error; + continue; /* no output */ +#endif + case 'O': + flags |= LONGINT; + /*FALLTHROUGH*/ + case 'o': + if ((error = adduarg(&types, flags))) + goto error; + break; + case 'p': + if ((error = addtype(&types, TP_VOID))) + goto error; + break; + case 'S': + flags |= LONGINT; + /*FALLTHROUGH*/ + case 's': + error = addtype(&types, + (flags & LONGINT) ? TP_WCHAR : TP_CHAR); + if (error) + goto error; + break; + case 'U': + flags |= LONGINT; + /*FALLTHROUGH*/ + case 'u': + case 'X': + case 'x': + if ((error = adduarg(&types, flags))) + goto error; + break; + default: /* "%?" prints ?, unless ? is NUL */ + if (ch == '\0') + goto done; + break; + } + } +done: + build_arg_table(&types, ap, argtable); +error: + freetypes(&types); + return (error || *argtable == NULL); +} + +#ifdef WCHAR_SUPPORT +/* wchar version of __find_arguments. */ +int +_frr_find_warguments (const wchar_t *fmt0, va_list ap, union arg **argtable) +{ + wchar_t *fmt; /* format string */ + wchar_t ch; /* character from fmt */ + u_int n; /* handy integer (short term usage) */ + int error; + int flags; /* flags as above */ + struct typetable types; /* table of types */ + + fmt = (wchar_t *)fmt0; + inittypes(&types); + error = 0; + + /* + * Scan the format for conversions (`%' character). + */ + for (;;) { + while ((ch = *fmt) != '\0' && ch != '%') + fmt++; + if (ch == '\0') + goto done; + fmt++; /* skip over '%' */ + + flags = 0; + +rflag: ch = *fmt++; +reswitch: switch (ch) { + case ' ': + case '#': + goto rflag; + case '*': + if ((error = addwaster(&types, &fmt))) + goto error; + goto rflag; + case '-': + case '+': + case '\'': + goto rflag; + case '.': + if ((ch = *fmt++) == '*') { + if ((error = addwaster(&types, &fmt))) + goto error; + goto rflag; + } + while (is_digit(ch)) { + ch = *fmt++; + } + goto reswitch; + case '0': + goto rflag; + case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + n = 0; + do { + n = 10 * n + to_digit(ch); + /* Detect overflow */ + if (n > MAX_POSARG) { + error = -1; + goto error; + } + ch = *fmt++; + } while (is_digit(ch)); + if (ch == '$') { + types.nextarg = n; + goto rflag; + } + goto reswitch; + case 'L': + flags |= LONGDBL; + goto rflag; + case 'h': + if (flags & SHORTINT) { + flags &= ~SHORTINT; + flags |= CHARINT; + } else + flags |= SHORTINT; + goto rflag; + case 'j': + flags |= INTMAXT; + goto rflag; + case 'l': + if (flags & LONGINT) { + flags &= ~LONGINT; + flags |= LLONGINT; + } else + flags |= LONGINT; + goto rflag; + case 'q': + flags |= LLONGINT; /* not necessarily */ + goto rflag; + case 't': + flags |= PTRDIFFT; + goto rflag; + case 'z': + flags |= SIZET; + goto rflag; + case 'C': + flags |= LONGINT; + /*FALLTHROUGH*/ + case 'c': + error = addtype(&types, + (flags & LONGINT) ? T_WINT : T_INT); + if (error) + goto error; + break; + case 'D': + flags |= LONGINT; + /*FALLTHROUGH*/ + case 'd': + case 'i': + if ((error = addsarg(&types, flags))) + goto error; + break; +#ifndef NO_FLOATING_POINT + case 'a': + case 'A': + case 'e': + case 'E': + case 'f': + case 'g': + case 'G': + error = addtype(&types, + (flags & LONGDBL) ? T_LONG_DOUBLE : T_DOUBLE); + if (error) + goto error; + break; +#endif /* !NO_FLOATING_POINT */ +#ifdef DANGEROUS_PERCENT_N + case 'n': + if (flags & INTMAXT) + error = addtype(&types, TP_INTMAXT); + else if (flags & PTRDIFFT) + error = addtype(&types, TP_PTRDIFFT); + else if (flags & SIZET) + error = addtype(&types, TP_SSIZET); + else if (flags & LLONGINT) + error = addtype(&types, TP_LLONG); + else if (flags & LONGINT) + error = addtype(&types, TP_LONG); + else if (flags & SHORTINT) + error = addtype(&types, TP_SHORT); + else if (flags & CHARINT) + error = addtype(&types, TP_SCHAR); + else + error = addtype(&types, TP_INT); + if (error) + goto error; + continue; /* no output */ +#endif + case 'O': + flags |= LONGINT; + /*FALLTHROUGH*/ + case 'o': + if ((error = adduarg(&types, flags))) + goto error; + break; + case 'p': + if ((error = addtype(&types, TP_VOID))) + goto error; + break; + case 'S': + flags |= LONGINT; + /*FALLTHROUGH*/ + case 's': + error = addtype(&types, + (flags & LONGINT) ? TP_WCHAR : TP_CHAR); + if (error) + goto error; + break; + case 'U': + flags |= LONGINT; + /*FALLTHROUGH*/ + case 'u': + case 'X': + case 'x': + if ((error = adduarg(&types, flags))) + goto error; + break; + default: /* "%?" prints ?, unless ? is NUL */ + if (ch == '\0') + goto done; + break; + } + } +done: + build_arg_table(&types, ap, argtable); +error: + freetypes(&types); + return (error || *argtable == NULL); +} +#endif /* WCHAR_SUPPORT */ + +/* + * Increase the size of the type table. Returns 0 on success. + */ +static int +__grow_type_table(struct typetable *types) +{ + enum typeid *const oldtable = types->table; + const int oldsize = types->tablesize; + enum typeid *newtable; + u_int n, newsize; + + /* Detect overflow */ + if (types->nextarg > MAX_POSARG) + return -1; + + newsize = oldsize * 2; + if (newsize < types->nextarg + 1) + newsize = types->nextarg + 1; + if (oldsize == STATIC_ARG_TBL_SIZE) { + if ((newtable = malloc(newsize * sizeof(enum typeid))) == NULL) + return -1; + bcopy(oldtable, newtable, oldsize * sizeof(enum typeid)); + } else { + newtable = realloc(oldtable, newsize * sizeof(enum typeid)); + if (newtable == NULL) + return -1; + } + for (n = oldsize; n < newsize; n++) + newtable[n] = T_UNUSED; + + types->table = newtable; + types->tablesize = newsize; + + return 0; +} + +/* + * Build the argument table from the completed type table. + * On malloc failure, *argtable is set to NULL. + */ +static void +build_arg_table(struct typetable *types, va_list ap, union arg **argtable) +{ + u_int n; + + if (types->tablemax >= STATIC_ARG_TBL_SIZE) { + *argtable = (union arg *) + malloc (sizeof(union arg) * (types->tablemax + 1)); + if (*argtable == NULL) + return; + } + + (*argtable) [0].intarg = 0; + for (n = 1; n <= types->tablemax; n++) { + switch (types->table[n]) { + case T_UNUSED: /* whoops! */ + (*argtable) [n].intarg = va_arg (ap, int); + break; + case TP_SCHAR: + (*argtable) [n].pschararg = va_arg (ap, signed char *); + break; + case TP_SHORT: + (*argtable) [n].pshortarg = va_arg (ap, short *); + break; + case T_INT: + (*argtable) [n].intarg = va_arg (ap, int); + break; + case T_U_INT: + (*argtable) [n].uintarg = va_arg (ap, unsigned int); + break; + case TP_INT: + (*argtable) [n].pintarg = va_arg (ap, int *); + break; + case T_LONG: + (*argtable) [n].longarg = va_arg (ap, long); + break; + case T_U_LONG: + (*argtable) [n].ulongarg = va_arg (ap, unsigned long); + break; + case TP_LONG: + (*argtable) [n].plongarg = va_arg (ap, long *); + break; + case T_LLONG: + (*argtable) [n].longlongarg = va_arg (ap, long long); + break; + case T_U_LLONG: + (*argtable) [n].ulonglongarg = va_arg (ap, unsigned long long); + break; + case TP_LLONG: + (*argtable) [n].plonglongarg = va_arg (ap, long long *); + break; + case T_PTRDIFFT: + (*argtable) [n].ptrdiffarg = va_arg (ap, ptrdiff_t); + break; + case TP_PTRDIFFT: + (*argtable) [n].pptrdiffarg = va_arg (ap, ptrdiff_t *); + break; + case T_SIZET: + (*argtable) [n].sizearg = va_arg (ap, size_t); + break; + case T_SSIZET: + (*argtable) [n].sizearg = va_arg (ap, ssize_t); + break; + case TP_SSIZET: + (*argtable) [n].pssizearg = va_arg (ap, ssize_t *); + break; + case T_INTMAXT: + (*argtable) [n].intmaxarg = va_arg (ap, intmax_t); + break; + case T_UINTMAXT: + (*argtable) [n].uintmaxarg = va_arg (ap, uintmax_t); + break; + case TP_INTMAXT: + (*argtable) [n].pintmaxarg = va_arg (ap, intmax_t *); + break; + case T_INT64T: + (*argtable) [n].intmaxarg = va_arg (ap, int64_t); + break; + case T_UINT64T: + (*argtable) [n].uintmaxarg = va_arg (ap, uint64_t); + break; + case T_DOUBLE: +#ifndef NO_FLOATING_POINT + (*argtable) [n].doublearg = va_arg (ap, double); +#endif + break; + case T_LONG_DOUBLE: +#ifndef NO_FLOATING_POINT + (*argtable) [n].longdoublearg = va_arg (ap, long double); +#endif + break; + case TP_CHAR: + (*argtable) [n].pchararg = va_arg (ap, char *); + break; + case TP_VOID: + (*argtable) [n].pvoidarg = va_arg (ap, void *); + break; + case T_WINT: + (*argtable) [n].wintarg = va_arg (ap, wint_t); + break; + case TP_WCHAR: + (*argtable) [n].pwchararg = va_arg (ap, wchar_t *); + break; + } + } +} |