/* Copyright (C) 2002 Manuel Novoa III * My stdio library for linux and (soon) elks. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the Free * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* This code needs a lot of clean up. Some of that is on hold until uClibc * gets a better configuration system (on Erik's todo list). * The other cleanup will take place during the implementation/integration of * the wide char (un)formatted i/o functions which I'm currently working on. */ /* ATTENTION! ATTENTION! ATTENTION! ATTENTION! ATTENTION! * * This code is currently under development. Also, I plan to port * it to elks which is a 16-bit environment with a fairly limited * compiler. Therefore, please refrain from modifying this code * and, instead, pass any bug-fixes, etc. to me. Thanks. Manuel * * ATTENTION! ATTENTION! ATTENTION! ATTENTION! ATTENTION! */ /* 4-01-2002 * Initialize thread locks for fake files in vsnprintf and vdprintf. * reported by Erik Andersen (andersen@codepoet.com) * Fix an arg promotion handling bug in _do_one_spec for %c. * reported by Ilguiz Latypov * * 5-10-2002 * Remove __isdigit and use new ctype.h version. * Add conditional setting of QUAL_CHARS for size_t and ptrdiff_t. */ #define _ISOC99_SOURCE /* for ULLONG primarily... */ #define _GNU_SOURCE #define _STDIO_UTILITY /* We're using _uintmaxtostr. */ #include #include #include #include #include #include #include #include #include #include #define __PRINTF_INFO_NO_BITFIELD #include #ifdef __STDIO_THREADSAFE #include #endif /* __STDIO_THREADSAFE */ /**********************************************************************/ /* These provide some control over printf's feature set */ #define __STDIO_PRINTF_FLOAT #define __STDIO_PRINTF_M_SUPPORT /**********************************************************************/ #if defined(__UCLIBC__) && !defined(__UCLIBC_HAS_FLOATS__) #undef __STDIO_PRINTF_FLOAT #endif #ifdef __BCC__ #undef __STDIO_PRINTF_FLOAT #endif #ifndef __STDIO_PRINTF_FLOAT #undef L__dtostr #endif /**********************************************************************/ #define __STDIO_GLIBC_CUSTOM_PRINTF /* TODO -- move these to a configuration section? */ #define MAX_FIELD_WIDTH 4095 #define MAX_USER_SPEC 10 #define MAX_POS_ARGS 10 /* TODO - fix the defs below */ #define MAX_ARGS_PER_SPEC (MAX_POS_ARGS-2) #if MAX_ARGS_PER_SPEC + 2 > MAX_POS_ARGS #define MAX_ARGS MAX_ARGS_PER_SPEC + 2 #else #define MAX_ARGS MAX_POS_ARGS #endif /**********************************************************************/ #define __PA_FLAG_INTMASK \ (__PA_FLAG_CHAR|PA_FLAG_SHORT|__PA_FLAG_INT|PA_FLAG_LONG|PA_FLAG_LONG_LONG) extern printf_function *_custom_printf_handler[MAX_USER_SPEC]; extern printf_arginfo_function *_custom_printf_arginfo[MAX_USER_SPEC]; extern char *_custom_printf_spec; /**********************************************************************/ #define SPEC_FLAGS " +0-#'I" enum { FLAG_SPACE = 0x01, FLAG_PLUS = 0x02, /* must be 2 * FLAG_SPACE */ FLAG_ZERO = 0x04, FLAG_MINUS = 0x08, /* must be 2 * FLAG_ZERO */ FLAG_HASH = 0x10, FLAG_THOUSANDS = 0x20, FLAG_I18N = 0x40 /* only works for d, i, u */ }; /**********************************************************************/ /* float layout 01234567890123456789 TODO: B?*/ #define SPEC_CHARS "npxXoudifFeEgGaACScs" enum { CONV_n = 0, CONV_p, CONV_x, CONV_X, CONV_o, CONV_u, CONV_d, CONV_i, CONV_f, CONV_F, CONV_e, CONV_E, CONV_g, CONV_G, CONV_a, CONV_A, CONV_C, CONV_S, CONV_c, CONV_s, #ifdef __STDIO_PRINTF_M_SUPPORT CONV_m, #endif CONV_custom0 /* must be last */ }; /* p x X o u d i */ #define SPEC_BASE { 16, 16, 16, 8, 10, 10, 10 } #define SPEC_RANGES { CONV_n, CONV_p, CONV_i, CONV_A, \ CONV_C, CONV_S, CONV_c, CONV_s, CONV_custom0 } #define SPEC_OR_MASK { \ /* n */ (PA_FLAG_PTR|PA_INT), \ /* p */ PA_POINTER, \ /* oxXudi */ PA_INT, \ /* fFeEgGaA */ PA_DOUBLE, \ /* C */ PA_WCHAR, \ /* S */ PA_WSTRING, \ /* c */ PA_CHAR, \ /* s */ PA_STRING, \ } #define SPEC_AND_MASK { \ /* n */ (PA_FLAG_PTR|__PA_INTMASK), \ /* p */ PA_POINTER, \ /* oxXudi */ (__PA_INTMASK), \ /* fFeEgGaA */ (PA_FLAG_LONG_DOUBLE|PA_DOUBLE), \ /* C */ (PA_WCHAR), \ /* S */ (PA_WSTRING), \ /* c */ (PA_CHAR), \ /* s */ (PA_STRING), \ } /**********************************************************************/ /* * In order to ease translation to what arginfo and _print_info._flags expect, * we map: 0:int 1:char 2:longlong 4:long 8:short * and then _flags |= (((q << 7) + q) & 0x701) and argtype |= (_flags & 0x701) */ /* TODO -- Fix the table below to take into account stdint.h. */ #ifndef LLONG_MAX #error fix QUAL_CHARS for no long long! Affects 'L', 'j', 'q', 'll'. #else #if LLONG_MAX != INTMAX_MAX #error fix QUAL_CHARS intmax_t entry 'j'! #endif #endif #ifdef PDS #error PDS already defined! #endif #ifdef SS #error SS already defined! #endif #if PTRDIFF_MAX == INT_MAX #define PDS 0 #elif PTRDIFF_MAX == LONG_MAX #define PDS 4 #elif defined(LLONG_MAX) && (PTRDIFF_MAX == LLONG_MAX) #define PDS 8 #else #error fix QUAL_CHARS ptrdiff_t entry 't'! #endif #if SIZE_MAX == UINT_MAX #define SS 0 #elif SIZE_MAX == ULONG_MAX #define SS 4 #elif defined(LLONG_MAX) && (SIZE_MAX == ULLONG_MAX) #define SS 8 #else #error fix QUAL_CHARS size_t entries 'z', 'Z'! #endif #define QUAL_CHARS { \ /* j:(u)intmax_t z:(s)size_t t:ptrdiff_t \0:int */ \ /* q:long_long Z:(s)size_t */ \ 'h', 'l', 'L', 'j', 'z', 't', 'q', 'Z', 0, \ 2, 4, 8, 8, SS, PDS, 8, SS, 0, /* TODO -- fix!!! */\ 1, 8 \ } /**********************************************************************/ #ifdef __STDIO_VA_ARG_PTR #ifdef __BCC__ #define __va_arg_ptr(ap,type) (((type *)(ap += sizeof(type))) - 1) #endif #if 1 #ifdef __GNUC__ /* TODO -- need other than for 386 as well! */ #ifndef __va_rounded_size #define __va_rounded_size(TYPE) \ (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int)) #endif #define __va_arg_ptr(AP, TYPE) \ (AP = (va_list) ((char *) (AP) + __va_rounded_size (TYPE)), \ ((void *) ((char *) (AP) - __va_rounded_size (TYPE)))) #endif #endif #endif /* __STDIO_VA_ARG_PTR */ #ifdef __va_arg_ptr #define GET_VA_ARG(AP,F,TYPE,ARGS) (*(AP) = __va_arg_ptr(ARGS,TYPE)) #define GET_ARG_VALUE(AP,F,TYPE) (*((TYPE *)(*(AP)))) #else typedef union { wchar_t wc; unsigned int u; unsigned long ul; #ifdef ULLONG_MAX unsigned long long ull; #endif #ifdef __STDIO_PRINTF_FLOAT double d; long double ld; #endif /* __STDIO_PRINTF_FLOAT */ void *p; } argvalue_t; #define GET_VA_ARG(AU,F,TYPE,ARGS) (AU->F = va_arg(ARGS,TYPE)) #define GET_ARG_VALUE(AU,F,TYPE) ((TYPE)((AU)->F)) #endif typedef struct { const char *fmtpos; /* TODO: move below struct?? */ struct printf_info info; int maxposarg; /* > 0 if args are positional, 0 if not, -1 if unknown */ int num_data_args; /* TODO: use sentinal??? */ unsigned int conv_num; unsigned char argnumber[4]; /* width | prec | 1st data | unused */ int argtype[MAX_ARGS]; va_list arg; #ifdef __va_arg_ptr void *argptr[MAX_ARGS]; #else /* While this is wasteful of space in the case where pos args aren't * enabled, it is also needed to support custom printf handlers. */ argvalue_t argvalue[MAX_ARGS]; #endif } ppfs_t; /* parse printf format state */ /**********************************************************************/ /* TODO: fix printf to return 0 and set errno if format error. Standard says only returns -1 if sets error indicator for the stream. */ #ifdef __STDIO_PRINTF_FLOAT extern size_t _dtostr(FILE * fp, long double x, struct printf_info *info); #endif #define _outnstr(stream, string, len) _stdio_fwrite(s, len, stream) /* TODO */ extern int _do_one_spec(FILE * __restrict stream, ppfs_t *ppfs, int *count); extern int _ppfs_init(ppfs_t *ppfs, const char *fmt0); /* validates */ extern void _ppfs_prepargs(ppfs_t *ppfs, va_list arg); /* sets posargptrs */ extern void _ppfs_setargs(ppfs_t *ppfs); /* sets argptrs for current spec */ extern int _ppfs_parsespec(ppfs_t *ppfs); /* parses specifier */ /**********************************************************************/ #ifdef L_parse_printf_format /* NOTE: This function differs from the glibc version in that parsing stops * upon encountering an invalid conversion specifier. Since this is the way * my printf functions work, I think it makes sense to do it that way here. * Unfortunately, since glibc sets the return type as size_t, we have no way * of returning that the template is illegal, other than returning 0. */ size_t parse_printf_format(register const char *template, size_t n, int *argtypes) { ppfs_t ppfs; size_t i; size_t count = 0; if (_ppfs_init(&ppfs, template) >= 0) { if (ppfs.maxposarg > 0) { /* Using positional args. */ count = ppfs.maxposarg; if (n > count) { n = count; } for (i = 0 ; i < n ; i++) { *argtypes++ = ppfs.argtype[i]; } } else { /* Not using positional args. */ while (*template) { if ((*template == '%') && (*++template != '%')) { ppfs.fmtpos = template; _ppfs_parsespec(&ppfs); /* Can't fail. */ template = ppfs.fmtpos; /* Update to one past spec end. */ if (ppfs.info.width == INT_MIN) { ++count; if (n > 0) { *argtypes++ = PA_INT; --n; } } if (ppfs.info.prec == INT_MIN) { ++count; if (n > 0) { *argtypes++ = PA_INT; --n; } } for (i = 0 ; i < ppfs.num_data_args ; i++) { if ((ppfs.argtype[i]) != __PA_NOARG) { ++count; if (n > 0) { *argtypes++ = ppfs.argtype[i]; --n; } } } } else { ++template; } } } } return count; } #endif /**********************************************************************/ #ifdef L_vfprintf /* We only support ascii digits (or their USC equivalent codes) in * precision and width settings in *printf (wide) format strings. * In other words, we don't currently support glibc's 'I' flag. * We do accept it, but it is currently ignored. */ /* TODO -- Implement grouping flag... on hold (locale support). */ int vfprintf(FILE * __restrict stream, register const char * __restrict format, va_list arg) { ppfs_t ppfs; int count, r; register const char *s; __STDIO_THREADLOCK(stream); count = 0; s = format; if (_ppfs_init(&ppfs, format) < 0) { /* Bad format string. */ _outnstr(stream, format, strlen(format)); count = -1; } else { _ppfs_prepargs(&ppfs, arg); do { while (*format && (*format != '%')) { ++format; } if (format-s) { /* output any literal text in format string */ if ( (r = _outnstr(stream, s, format-s)) < 0) { count = -1; break; } count += r; } if (!*format) { /* we're done */ break; } if (format[1] != '%') { /* if we get here, *format == '%' */ /* TODO: _do_one_spec needs to know what the output funcs are!!! */ ppfs.fmtpos = ++format; /* TODO: check -- should only fail on stream error */ if ( (r = _do_one_spec(stream, &ppfs, &count)) < 0) { count = -1; break; } s = format = ppfs.fmtpos; } else { /* %% means literal %, so start new string */ s = ++format; ++format; } } while (1); } __STDIO_THREADUNLOCK(stream); return count; } #endif /**********************************************************************/ #ifdef L__ppfs_init int _ppfs_init(register ppfs_t *ppfs, const char *fmt0) { int r; /* First, zero out everything... argnumber[], argtype[], argptr[] */ memset(ppfs, 0, sizeof(ppfs_t)); /* TODO: nonportable???? */ --ppfs->maxposarg; /* set to -1 */ /* now set all argtypes to no-arg */ { #if 1 /* TODO - use memset here since already "paid for"? */ register int *p = ppfs->argtype; r = MAX_ARGS; do { *p++ = __PA_NOARG; } while (--r); #else /* TODO -- get rid of this?? */ register char *p = (char *) ((MAX_ARGS-1) * sizeof(int)); do { *((int *)(((char *)ppfs) + ((int)p) + offsetof(ppfs_t,argtype))) = __PA_NOARG; p -= sizeof(int); } while (p); #endif } /* * Run through the entire format string to validate it and initialize * the positional arg numbers (if any). */ { register const char *fmt = fmt0; while (*fmt) { if ((*fmt == '%') && (*++fmt != '%')) { ppfs->fmtpos = fmt; /* back up to the '%' */ if ((r = _ppfs_parsespec(ppfs)) < 0) { return -1; } fmt = ppfs->fmtpos; /* update to one past end of spec */ } else { ++fmt; } } ppfs->fmtpos = fmt0; /* rewind */ } /* If we have positional args, make sure we know all the types. */ { register int *p = ppfs->argtype; r = ppfs->maxposarg; while (--r >= 0) { if ( *p == __PA_NOARG ) { /* missing arg type!!! */ return -1; } ++p; } } return 0; } #endif /**********************************************************************/ #ifdef L__ppfs_prepargs void _ppfs_prepargs(register ppfs_t *ppfs, va_list arg) { int i; #ifdef __va_copy __va_copy(ppfs->arg, arg); #else /* TODO -- maybe create a bits/vacopy.h for arch specific versions * to ensure we get the right behavior? Either that or fall back * on the portable (but costly in size) method of using a va_list *. * That means a pointer derefs in the va_arg() invocations... */ #warning __va_copy is not defined, using a simple copy instead... /* the glibc manual suggests that this will usually suffice when __va_copy doesn't exist. */ ppfs->arg = arg; #endif if ((i = ppfs->maxposarg) > 0) { /* init for positional args */ ppfs->num_data_args = i; ppfs->info.width = ppfs->info.prec = ppfs->maxposarg = 0; _ppfs_setargs(ppfs); ppfs->maxposarg = i; } } #endif /**********************************************************************/ #ifdef L__ppfs_setargs void _ppfs_setargs(register ppfs_t *ppfs) { #ifdef __va_arg_ptr register void **p = ppfs->argptr; #else register argvalue_t *p = ppfs->argvalue; #endif int i; if (ppfs->maxposarg == 0) { /* initing for or no pos args */ if (ppfs->info.width == INT_MIN) { ppfs->info.width = #ifdef __va_arg_ptr *(int *) #endif GET_VA_ARG(p,u,unsigned int,ppfs->arg); } if (ppfs->info.prec == INT_MIN) { ppfs->info.prec = #ifdef __va_arg_ptr *(int *) #endif GET_VA_ARG(p,u,unsigned int,ppfs->arg); } i = 0; while (i < ppfs->num_data_args) { switch(ppfs->argtype[i++]) { case (PA_INT|PA_FLAG_LONG_LONG): #ifdef ULLONG_MAX GET_VA_ARG(p,ull,unsigned long long,ppfs->arg); break; #endif case (PA_INT|PA_FLAG_LONG): #if ULONG_MAX != UINT_MAX GET_VA_ARG(p,ul,unsigned long,ppfs->arg); break; #endif case PA_CHAR: /* TODO - be careful */ /* ... users could use above and really want below!! */ case (PA_INT|__PA_FLAG_CHAR):/* TODO -- translate this!!! */ case (PA_INT|PA_FLAG_SHORT): case PA_INT: GET_VA_ARG(p,u,unsigned int,ppfs->arg); break; case PA_WCHAR: /* TODO -- assume int? */ /* we're assuming wchar_t is at least an int */ GET_VA_ARG(p,wc,wchar_t,ppfs->arg); break; #ifdef __STDIO_PRINTF_FLOAT /* PA_FLOAT */ case PA_DOUBLE: GET_VA_ARG(p,d,double,ppfs->arg); break; case (PA_DOUBLE|PA_FLAG_LONG_DOUBLE): GET_VA_ARG(p,ld,long double,ppfs->arg); break; #else /* __STDIO_PRINTF_FLOAT */ case PA_DOUBLE: case (PA_DOUBLE|PA_FLAG_LONG_DOUBLE): assert(0); continue; #endif /* __STDIO_PRINTF_FLOAT */ default: /* TODO -- really need to ensure this can't happen */ assert(ppfs->argtype[i-1] & PA_FLAG_PTR); case PA_POINTER: case PA_STRING: case PA_WSTRING: GET_VA_ARG(p,p,void *,ppfs->arg); break; case __PA_NOARG: continue; } ++p; } } else { if (ppfs->info.width == INT_MIN) { ppfs->info.width = (int) GET_ARG_VALUE(p + ppfs->argnumber[0] - 1,u,unsigned int); } if (ppfs->info.prec == INT_MIN) { ppfs->info.prec = (int) GET_ARG_VALUE(p + ppfs->argnumber[1] - 1,u,unsigned int); } } /* Now we know the width and precision. */ if (ppfs->info.width < 0) { ppfs->info.width = -ppfs->info.width; PRINT_INFO_SET_FLAG(&(ppfs->info),left); PRINT_INFO_CLR_FLAG(&(ppfs->info),space); ppfs->info.pad = ' '; } #if 0 /* NOTE -- keep neg for now so float knows! */ if (ppfs->info.prec < 0) { /* spec says treat as omitted. */ /* so use default prec... 1 for everything but floats and strings. */ ppfs->info.prec = 1; } #endif } #endif /**********************************************************************/ #ifdef L__ppfs_parsespec /* Notes: argtype differs from glibc for the following: * mine glibc * lc PA_WCHAR PA_CHAR the standard says %lc means %C * ls PA_WSTRING PA_STRING the standard says %ls means %S * {*}n {*}|PA_FLAG_PTR PA_FLAG_PTR size of n can be qualified */ /* TODO: store positions of positional args */ /* TODO -- WARNING -- assumes aligned on integer boundaries!!! */ /* TODO -- disable if not using positional args!!! */ #define _OVERLAPPING_DIFFERENT_ARGS /* TODO -- rethink this -- perhaps we should set to largest type??? */ #ifdef _OVERLAPPING_DIFFERENT_ARGS #define PROMOTED_SIZE_OF(X) ((sizeof(X) + sizeof(int) - 1) / sizeof(X)) static const short int type_codes[] = { __PA_NOARG, /* must be first entry */ PA_POINTER, PA_STRING, PA_WSTRING, PA_CHAR, PA_INT|PA_FLAG_SHORT, PA_INT, PA_INT|PA_FLAG_LONG, PA_INT|PA_FLAG_LONG_LONG, PA_WCHAR, #ifdef __STDIO_PRINTF_FLOAT /* PA_FLOAT, */ PA_DOUBLE, PA_DOUBLE|PA_FLAG_LONG_DOUBLE, #endif /* __STDIO_PRINTF_FLOAT */ }; static const unsigned char type_sizes[] = { /* unknown type consumes no arg */ 0, /* must be first entry */ PROMOTED_SIZE_OF(void *), PROMOTED_SIZE_OF(char *), PROMOTED_SIZE_OF(wchar_t *), PROMOTED_SIZE_OF(char), PROMOTED_SIZE_OF(short), PROMOTED_SIZE_OF(int), PROMOTED_SIZE_OF(long), #ifdef ULLONG_MAX PROMOTED_SIZE_OF(long long), #else PROMOTED_SIZE_OF(long), /* TODO -- is this correct? (above too) */ #endif PROMOTED_SIZE_OF(wchar_t), #ifdef __STDIO_PRINTF_FLOAT /* PROMOTED_SIZE_OF(float), */ PROMOTED_SIZE_OF(double), PROMOTED_SIZE_OF(long double), #endif /* __STDIO_PRINTF_FLOAT */ }; static int _promoted_size(int argtype) { register const short int *p; /* note -- since any unrecognized type is treated as a pointer */ p = type_codes + sizeof(type_codes)/sizeof(type_codes[0]); do { if (*--p == argtype) { break; } } while (p > type_codes); return type_sizes[(int)(p - type_codes)]; } static int _is_equal_or_bigger_arg(int curtype, int newtype) { /* Quick test */ if (newtype == __PA_NOARG) { return 0; } if ((curtype == __PA_NOARG) || (curtype == newtype)) { return 1; } /* Ok... slot is already filled and types are different in name. */ /* So, compare promoted sizes of curtype and newtype args. */ return _promoted_size(curtype) <= _promoted_size(newtype); } #else #define _is_equal_or_bigger_arg(C,N) (((C) == __PA_NOARG) || ((C) == (N))) #endif /* TODO - do this differently? */ static char _bss_custom_printf_spec[MAX_USER_SPEC]; /* 0-init'd for us. */ char *_custom_printf_spec = _bss_custom_printf_spec; printf_arginfo_function *_custom_printf_arginfo[MAX_USER_SPEC]; extern int _ppfs_parsespec(ppfs_t *ppfs) { register const char *fmt; register const char *p; int preci; int width; int flags; int dataargtype; int i; int dpoint; int maxposarg; int p_m_spec_chars; int n; int argtype[MAX_ARGS_PER_SPEC+2]; int argnumber[3]; /* width, precision, 1st data arg */ unsigned int conv_num; static const char spec_flags[] = SPEC_FLAGS; static const char spec_chars[] = SPEC_CHARS;/* TODO: b? */ static const char spec_ranges[] = SPEC_RANGES; static const short spec_or_mask[] = SPEC_OR_MASK; static const short spec_and_mask[] = SPEC_AND_MASK; static const char qual_chars[] = QUAL_CHARS; /* WIDE note: we can test against '%' here since we don't allow */ /* WIDE note: other mappings of '%' in the wide char set. */ preci = -1; width = flags = dpoint = 0; argnumber[0] = 0; argnumber[1] = 0; argtype[0] = __PA_NOARG; argtype[1] = __PA_NOARG; maxposarg = ppfs->maxposarg; fmt = ppfs->fmtpos; assert(fmt[-1] == '%'); assert(fmt[0] != '%'); /* Process arg pos and/or flags and/or width and/or precision. */ width_precision: p = fmt; if (*fmt == '*') { argtype[-dpoint] = PA_INT; ++fmt; } i = 0; while (__isdigit(*fmt)) { if (i < MAX_FIELD_WIDTH) { /* Avoid overflow. */ i = (i * 10) + (*fmt - '0'); } ++fmt; } if (p[-1] == '%') { /* Check for a position. */ /* TODO: if val not in range, then error */ if ((*fmt == '$') && (i > 0)) {/* Positional spec. */ ++fmt; if (maxposarg == 0) { return -1; } if ((argnumber[2] = i) > maxposarg) { maxposarg = i; } /* Now fall through to check flags. */ } else { if (maxposarg > 0) { return -1; } maxposarg = 0; /* Possible redundant store, but cuts size. */ if ((fmt > p) && (*p != '0')) { goto PREC_WIDTH; } fmt = p; /* Back up for possible '0's flag. */ /* Now fall through to check flags. */ } restart_flags: /* Process flags. */ i = 1; p = spec_flags; do { if (*fmt == *p++) { ++fmt; flags |= i; goto restart_flags; } i += i; /* Better than i <<= 1 for bcc */ } while (*p); i = 0; /* If '+' then ignore ' ', and if '-' then ignore '0'. */ /* Note: Need to ignore '0' when prec is an arg with val < 0, */ /* but that test needs to wait until the arg is retrieved. */ flags &= ~((flags & (FLAG_PLUS|FLAG_MINUS)) >> 1); /* Note: Ignore '0' when prec is specified < 0 too (in printf). */ if (fmt[-1] != '%') { /* If we've done anything, loop for width. */ goto width_precision; } } PREC_WIDTH: if (*p == '*') { /* Prec or width takes an arg. */ if (maxposarg) { if ((*fmt++ != '$') || (i <= 0)) { /* Using pos args and no $ or invalid arg number. */ return -1; } argnumber[-dpoint] = i; } else if (++p != fmt) { /* Not using pos args but digits followed *. */ return -1; } i = INT_MIN; } if (!dpoint) { width = i; if (*fmt == '.') { ++fmt; dpoint = -1; /* To use as default precison. */ goto width_precision; } } else { preci = i; } /* Process qualifier. */ p = qual_chars; do { if (*fmt == *p) { ++fmt; break; } } while (*++p); if ((p - qual_chars < 2) && (*fmt == *p)) { p += ((sizeof(qual_chars)-2) / 2); ++fmt; } dataargtype = ((int)(p[(sizeof(qual_chars)-2) / 2])) << 8; /* Process conversion specifier. */ if (!*fmt) { return -1; } p = spec_chars; do { if (*fmt == *p) { p_m_spec_chars = p - spec_chars; if ((p_m_spec_chars >= CONV_c) && (dataargtype & PA_FLAG_LONG)) { p_m_spec_chars -= 2; /* lc -> C and ls -> S */ } conv_num = p_m_spec_chars; p = spec_ranges-1; while (p_m_spec_chars > *++p) {} i = p - spec_ranges; argtype[2] = (dataargtype | spec_or_mask[i]) & spec_and_mask[i]; p = spec_chars; break; } } while(*++p); ppfs->info.spec = *fmt; ppfs->info.prec = preci; ppfs->info.width = width; ppfs->info.pad = ((flags & FLAG_ZERO) ? '0' : ' '); ppfs->info._flags = (flags & ~FLAG_ZERO) | (dataargtype & __PA_INTMASK); ppfs->num_data_args = 1; if (!*p) { #ifdef __STDIO_GLIBC_CUSTOM_PRINTF /* TODO -- gnu %m support build option. */ #ifdef __STDIO_PRINTF_M_SUPPORT if (*fmt == 'm') { conv_num = CONV_m; ppfs->num_data_args = 0; goto DONE; } #endif /* Handle custom arg -- WARNING -- overwrites p!!! */ conv_num = CONV_custom0; p = _custom_printf_spec; do { if (*p == *fmt) { if ((ppfs->num_data_args = ((*_custom_printf_arginfo[(int)(p-_custom_printf_spec)]) (&(ppfs->info), MAX_ARGS_PER_SPEC, argtype+2))) > MAX_ARGS_PER_SPEC) { break; /* Error -- too many args! */ } goto DONE; } } while (++p < (_custom_printf_spec + MAX_USER_SPEC)); #endif /* __STDIO_GLIBC_CUSTOM_PRINTF */ /* Otherwise error. */ return -1; } #ifdef __STDIO_GLIBC_CUSTOM_PRINTF DONE: #endif if (maxposarg > 0) { i = 0; do { /* Update maxposarg and check that NL_ARGMAX is not exceeded. */ n = ((i <= 2) ? (ppfs->argnumber[i] = argnumber[i]) : argnumber[2] + (i-2)); if (n > maxposarg) { if ((maxposarg = n) > NL_ARGMAX) { return -1; } } --n; /* Record argtype with largest size (current, new). */ if (_is_equal_or_bigger_arg(ppfs->argtype[n], argtype[i])) { ppfs->argtype[n] = argtype[i]; } } while (++i < ppfs->num_data_args + 2); } else { ppfs->argnumber[2] = 1; memcpy(ppfs->argtype, argtype + 2, ppfs->num_data_args * sizeof(int)); } ppfs->maxposarg = maxposarg; ppfs->fmtpos = ++fmt; ppfs->conv_num = conv_num; return ppfs->num_data_args + 2; } #endif /**********************************************************************/ #ifdef L_register_printf_function int register_printf_function(int spec, printf_function handler, printf_arginfo_function arginfo) { register char *r; register char *p; if (spec && (arginfo != NULL)) { /* TODO -- check if spec is valid char */ r = NULL; p = _custom_printf_spec + MAX_USER_SPEC; do { --p; if (!*p) { r = p; } #ifdef __BCC__ else /* bcc generates less code with fall-through */ #endif if (*p == spec) { r = p; p = _custom_printf_spec; } } while (p > _custom_printf_spec); if (r) { if (handler) { *r = spec; _custom_printf_handler[(int)(r - p)] = handler; _custom_printf_arginfo[(int)(r - p)] = arginfo; } else { *r = 0; } return 0; } /* TODO -- if asked to unregister a non-existent spec, return what? */ } return -1; } #endif /**********************************************************************/ #ifdef L__do_one_spec printf_function *_custom_printf_handler[MAX_USER_SPEC]; extern void _store_inttype(void *dest, int desttype, uintmax_t val); extern uintmax_t _load_inttype(int desttype, const void *src, int uflag); extern void _charpad(FILE * __restrict stream, char padchar, size_t numpad); extern void output(FILE * __restrict stream, const char *s); #define output(F,S) fputs(S,F) #undef putc void _charpad(FILE * __restrict stream, char padchar, size_t numpad) { /* TODO -- Use a buffer to cut down on function calls... */ char pad[1]; *pad = padchar; while (numpad) { _stdio_fwrite(pad, 1, stream); --numpad; } } /* TODO -- Dynamically allocate work space to accomodate stack-poor archs? */ int _do_one_spec(FILE * __restrict stream, register ppfs_t *ppfs, int *count) { static const char spec_base[] = SPEC_BASE; static const char prefix[] = "+\0-\0 \0000x\0000X"; /* 0 2 4 6 9 11*/ enum { PREFIX_PLUS = 0, PREFIX_MINUS = 2, PREFIX_SPACE = 4, PREFIX_LWR_X = 6, PREFIX_UPR_X = 9, PREFIX_NONE = 11 }; #ifdef __va_arg_ptr const void * const *argptr; #else const void * argptr[MAX_ARGS_PER_SPEC]; #endif int *argtype; size_t slen; int base; int numpad; int numfill = 0; /* TODO: fix */ int prefix_num = PREFIX_NONE; char padchar = ' '; char buf[64]; #ifdef NDEBUG _ppfs_parsespec(ppfs); #else if (_ppfs_parsespec(ppfs) < 0) { /* TODO: just for debugging */ abort(); } #endif _ppfs_setargs(ppfs); argtype = ppfs->argtype + ppfs->argnumber[2] - 1; /* Deal with the argptr vs argvalue issue. */ #ifdef __va_arg_ptr argptr = (const void * const *) ppfs->argptr; if (ppfs->maxposarg > 0) { /* Using positional args... */ argptr += ppfs->argnumber[2] - 1; } #else /* Need to build a local copy... */ { register argvalue_t *p = ppfs->argvalue; int i; if (ppfs->maxposarg > 0) { /* Using positional args... */ p += ppfs->argnumber[2] - 1; } for (i = 0 ; i < ppfs->num_data_args ; i++ ) { argptr[i] = (void *) p++; } } #endif { register char *s; /* TODO: Should s be unsigned char * ? */ if (ppfs->conv_num == CONV_n) { _store_inttype(*(void **)*argptr, ppfs->info._flags & __PA_INTMASK, (intmax_t) (*count)); return 0; } if (ppfs->conv_num <= CONV_i) { /* pointer or (un)signed int */ base = spec_base[(int)(ppfs->conv_num - CONV_p)]; if (ppfs->conv_num <= CONV_u) { /* pointer or unsigned int */ if (ppfs->conv_num == CONV_p) { /* pointer */ prefix_num = PREFIX_LWR_X; } else { /* unsigned int */ } } else { /* signed int */ base = -base; } if (ppfs->info.prec < 0) { /* Ignore '0' flag if prec specified. */ padchar = ppfs->info.pad; } s = _uintmaxtostr(buf + sizeof(buf) - 1, (uintmax_t) _load_inttype(*argtype & __PA_INTMASK, *argptr, base), base, ((ppfs->conv_num == CONV_X) ? __UIM_UPPER : __UIM_LOWER)); if (ppfs->conv_num > CONV_u) { /* signed int */ if (*s == '-') { PRINT_INFO_SET_FLAG(&(ppfs->info),showsign); ++s; /* handle '-' in the prefix string */ prefix_num = PREFIX_MINUS; } else if (PRINT_INFO_FLAG_VAL(&(ppfs->info),showsign)) { prefix_num = PREFIX_PLUS; } else if (PRINT_INFO_FLAG_VAL(&(ppfs->info),space)) { prefix_num = PREFIX_SPACE; } } slen = (char *)(buf + sizeof(buf) - 1) - s; numfill = ((ppfs->info.prec < 0) ? 1 : ppfs->info.prec); if (PRINT_INFO_FLAG_VAL(&(ppfs->info),alt)) { if (ppfs->conv_num <= CONV_x) { /* x or p */ prefix_num = PREFIX_LWR_X; } if (ppfs->conv_num == CONV_X) { prefix_num = PREFIX_UPR_X; } if ((ppfs->conv_num == CONV_o) && (numfill < slen)) { numfill = ((*s == '0') ? 1 : slen + 1); } } if (*s == '0') { if (prefix_num >= PREFIX_LWR_X) { prefix_num = PREFIX_NONE; } if (ppfs->conv_num == CONV_p) {/* null pointer */ s = "(nil)"; slen = 5; numfill = 0; } else if (numfill == 0) { /* if precision 0, no output */ slen = 0; } } numfill = ((numfill > slen) ? numfill - slen : 0); } else if (ppfs->conv_num <= CONV_A) { /* floating point */ #ifdef __STDIO_PRINTF_FLOAT *count += _dtostr(stream, (PRINT_INFO_FLAG_VAL(&(ppfs->info),is_long_double) ? *(long double *) *argptr : (long double) (* (double *) *argptr)), &ppfs->info); return 0; #else /* __STDIO_PRINTF_FLOAT */ return -1; /* TODO -- try ton continue? */ #endif /* __STDIO_PRINTF_FLOAT */ } else if (ppfs->conv_num <= CONV_S) { /* wide char or string */ #if 1 return -1; /* TODO -- wide */ #else if (ppfs->conv_num == CONV_S) { /* wide string */ } else { /* wide char */ } #endif } else if (ppfs->conv_num <= CONV_s) { /* char or string */ if (ppfs->conv_num == CONV_s) { /* string */ s = *((char **) (*argptr)); if (s) { SET_STRING_LEN: slen = strnlen(s, ((ppfs->info.prec >= 0) ? ppfs->info.prec : SIZE_MAX)); } else { s = "(null)"; slen = 6; } } else { /* char */ s = (char *) buf; *s = (unsigned char)(*((const int *) *argptr)); s[1] = 0; slen = 1; } #ifdef __STDIO_PRINTF_M_SUPPORT } else if (ppfs->conv_num == CONV_m) { s = strerror(errno); goto SET_STRING_LEN; #endif } else { assert(ppfs->conv_num == CONV_custom0); s = _custom_printf_spec; do { if (*s == ppfs->info.spec) { int rv; /* TODO -- check return value for sanity? */ rv = (*_custom_printf_handler [(int)(s-_custom_printf_spec)]) (stream, &ppfs->info, argptr); if (rv < 0) { return -1; } *count += rv; return 0; } } while (++s < (_custom_printf_spec + MAX_USER_SPEC)); assert(0); return -1; } { size_t t; t = slen + numfill; if (prefix_num != PREFIX_NONE) { t += ((prefix_num < PREFIX_LWR_X) ? 1 : 2); } numpad = ((ppfs->info.width > t) ? (ppfs->info.width - t) : 0); *count += t + numpad; } if (padchar == '0') { /* TODO: check this */ numfill += numpad; numpad = 0; } /* Now handle the output itself. */ if (!PRINT_INFO_FLAG_VAL(&(ppfs->info),left)) { _charpad(stream, ' ', numpad); numpad = 0; } output(stream, prefix + prefix_num); _charpad(stream, '0', numfill); _outnstr(stream, s, slen); _charpad(stream, ' ', numpad); } return 0; } #endif /**********************************************************************/ #ifdef L_vsnprintf #ifdef __STDIO_BUFFERS int vsnprintf(char *__restrict buf, size_t size, const char * __restrict format, va_list arg) { FILE f; int rv; #ifdef __STDIO_GETC_MACRO f.bufgetc = #endif f.bufrpos = f.bufwpos = f.bufstart = buf; if (size > SIZE_MAX - (size_t) buf) { size = SIZE_MAX - (size_t) buf; } #ifdef __STDIO_PUTC_MACRO f.bufputc = #endif f.bufend = buf + size; #if 0 /* shouldn't be necessary */ /* #ifdef __STDIO_GLIBC_CUSTOM_STREAMS */ f.cookie = &(f.filedes); f.gcs.read = 0; f.gcs.write = 0; f.gcs.seek = 0; f.gcs.close = 0; #endif f.filedes = -2; /* for debugging */ f.modeflags = (__FLAG_NARROW|__FLAG_WRITEONLY|__FLAG_WRITING); #ifdef __STDIO_THREADSAFE __stdio_init_mutex(&f.lock); #endif rv = vfprintf(&f, format, arg); if (size) { if (f.bufwpos == f.bufend) { --f.bufwpos; } *f.bufwpos = 0; } return rv; } #else /* __STDIO_BUFFERS */ #ifdef __STDIO_GLIBC_CUSTOM_STREAMS typedef struct { size_t pos; size_t len; unsigned char *buf; FILE *fp; } __snpf_cookie; #define COOKIE ((__snpf_cookie *) cookie) static ssize_t snpf_write(void *cookie, const char *buf, size_t bufsize) { size_t count; char *p; /* Note: bufsize < SSIZE_MAX because of _stdio_WRITE. */ if (COOKIE->len > COOKIE->pos) { count = COOKIE->len - COOKIE->pos - 1; /* Leave space for nul. */ if (count > bufsize) { count = bufsize; } p = COOKIE->buf + COOKIE->pos; while (count) { *p++ = *buf++; --count; } *p = 0; } COOKIE->pos += bufsize; return bufsize; } #undef COOKIE int vsnprintf(char *__restrict buf, size_t size, const char * __restrict format, va_list arg) { FILE f; __snpf_cookie cookie; int rv; cookie.buf = buf; cookie.len = size; cookie.pos = 0; cookie.fp = &f; f.cookie = &cookie; f.gcs.write = snpf_write; f.gcs.read = NULL; f.gcs.seek = NULL; f.gcs.close = NULL; f.filedes = -1; /* For debugging. */ f.modeflags = (__FLAG_NARROW|__FLAG_WRITEONLY|__FLAG_WRITING); #ifdef __STDIO_THREADSAFE __stdio_init_mutex(&f.lock); #endif rv = vfprintf(&f, format, arg); return rv; } #else /* __STDIO_GLIBC_CUSTOM_STREAMS */ #warning skipping vsnprintf since no buffering and no custom streams! #endif /* __STDIO_GLIBC_CUSTOM_STREAMS */ #endif /* __STDIO_BUFFERS */ #endif /**********************************************************************/ #ifdef L_vdprintf int vdprintf(int filedes, const char * __restrict format, va_list arg) { FILE f; int rv; #ifdef __STDIO_BUFFERS char buf[64]; /* TODO: provide _optional_ buffering? */ #ifdef __STDIO_GETC_MACRO f.bufgetc = #endif f.bufrpos = f.bufwpos = f.bufstart = buf; #ifdef __STDIO_PUTC_MACRO f.bufputc = #endif f.bufend = buf + sizeof(buf); #endif /* __STDIO_BUFFERS */ #ifdef __STDIO_GLIBC_CUSTOM_STREAMS f.cookie = &(f.filedes); f.gcs.read = _cs_read; f.gcs.write = _cs_write; f.gcs.seek = 0; /* The internal seek func handles normals. */ f.gcs.close = _cs_close; #endif f.filedes = filedes; f.modeflags = (__FLAG_NARROW|__FLAG_WRITEONLY|__FLAG_WRITING); #ifdef __STDIO_THREADSAFE __stdio_init_mutex(&f.lock); #endif rv = vfprintf(&f, format, arg); return fflush(&f) ? -1 : rv; } #endif /**********************************************************************/ #ifdef L_vasprintf #if !defined(__STDIO_BUFFERS) && !defined(__STDIO_GLIBC_CUSTOM_STREAMS) #warning skipping vasprintf since no buffering and no custom streams! #else int vasprintf(char **__restrict buf, const char * __restrict format, va_list arg) { /* TODO -- change the default implementation? */ #ifndef __STDIO_GLIBC_CUSTOM_STREAMS /* This implementation actually calls the printf machinery twice, but only * only does one malloc. This can be a problem though when custom printf * specs or the %m specifier are involved because the results of the * second call might be different from the first. */ int rv = vsnprintf(NULL, 0, format, arg); return (((rv >= 0) && ((*buf = malloc(++rv)) != NULL)) ? vsnprintf(*buf, rv, format, arg) : -1); #else FILE *f; size_t size; int rv; /* TODO - do the memstream stuff inline here to avoid fclose and the openlist? */ if ((f = open_memstream(buf, &size)) == NULL) { return -1; } rv = vfprintf(f, format, arg); fclose(f); if (rv < 0) { free(*buf); *buf = NULL; return -1; } return rv; #endif } #endif #endif /**********************************************************************/ #ifdef L_vprintf int vprintf(const char * __restrict format, va_list arg) { return vfprintf(stdout, format, arg); } #endif /**********************************************************************/ #ifdef L_vsprintf #if !defined(__STDIO_BUFFERS) && !defined(__STDIO_GLIBC_CUSTOM_STREAMS) #warning skipping vsprintf since no buffering and no custom streams! #else int vsprintf(char *__restrict buf, const char * __restrict format, va_list arg) { return vsnprintf(buf, SIZE_MAX, format, arg); } #endif #endif /**********************************************************************/ #ifdef L_fprintf int fprintf(FILE * __restrict stream, const char * __restrict format, ...) { va_list arg; int rv; va_start(arg, format); rv = vfprintf(stream, format, arg); va_end(arg); return rv; } #endif /**********************************************************************/ #ifdef L_snprintf #if !defined(__STDIO_BUFFERS) && !defined(__STDIO_GLIBC_CUSTOM_STREAMS) #warning skipping snprintf since no buffering and no custom streams! #else int snprintf(char *__restrict buf, size_t size, const char * __restrict format, ...) { va_list arg; int rv; va_start(arg, format); rv = vsnprintf(buf, size, format, arg); va_end(arg); return rv; } #endif #endif /**********************************************************************/ #ifdef L_dprintf int dprintf(int filedes, const char * __restrict format, ...) { va_list arg; int rv; va_start(arg, format); rv = vdprintf(filedes, format, arg); va_end(arg); return rv; } #endif /**********************************************************************/ #ifdef L_asprintf #if !defined(__STDIO_BUFFERS) && !defined(__STDIO_GLIBC_CUSTOM_STREAMS) #warning skipping asprintf and __asprintf since no buffering and no custom streams! #else weak_alias(__asprintf,asprintf) int __asprintf(char **__restrict buf, const char * __restrict format, ...) { va_list arg; int rv; va_start(arg, format); rv = vasprintf(buf, format, arg); va_end(arg); return rv; } #endif #endif /**********************************************************************/ #ifdef L_printf int printf(const char * __restrict format, ...) { va_list arg; int rv; va_start(arg, format); rv = vfprintf(stdout, format, arg); va_end(arg); return rv; } #endif /**********************************************************************/ #ifdef L_sprintf #if !defined(__STDIO_BUFFERS) && !defined(__STDIO_GLIBC_CUSTOM_STREAMS) #warning skipping sprintf since no buffering and no custom streams! #else int sprintf(char *__restrict buf, const char * __restrict format, ...) { va_list arg; int rv; va_start(arg, format); rv = vsnprintf(buf, SIZE_MAX, format, arg); va_end(arg); return rv; } #endif #endif /**********************************************************************/ #ifdef L__dtostr /* * Copyright (C) 2000, 2001 Manuel Novoa III * * Function: size_t _dtostr(FILE *fp, long double x, struct printf_info *info) * * This was written for uClibc to provide floating point support for * the printf functions. It handles +/- infinity and nan on i386. * * Notes: * * At most MAX_DIGITS significant digits are kept. Any trailing digits * are treated as 0 as they are really just the results of rounding noise * anyway. If you want to do better, use an arbitary precision arithmetic * package. ;-) * * It should also be fairly portable, as not assumptions are made about the * bit-layout of doubles. * * It should be too difficult to convert this to handle long doubles on i386. * For information, see the comments below. * * TODO: * long double and/or float version? (note: for float can trim code some). * * Decrease the size. This is really much bigger than I'd like. */ /*****************************************************************************/ /* Don't change anything that follows unless you know what you're doing. */ /*****************************************************************************/ /* * Configuration for the scaling power table. Ignoring denormals, you * should have 2**EXP_TABLE_SIZE >= LDBL_MAX_EXP >= 2**(EXP_TABLE_SIZE-1). * The minimum for standard C is 6. For IEEE 8bit doubles, 9 suffices. * For long doubles on i386, use 13. */ #define EXP_TABLE_SIZE 13 /* * Set this to the maximum number of digits you want converted. * Conversion is done in blocks of DIGITS_PER_BLOCK (9 by default) digits. * (20) 17 digits suffices to uniquely determine a (long) double on i386. */ #define MAX_DIGITS 20 /* * Set this to the smallest integer type capable of storing a pointer. */ #define INT_OR_PTR int /* * This is really only used to check for infinities. The macro produces * smaller code for i386 and, since this is tested before any floating point * calculations, it doesn't appear to suffer from the excess precision problem * caused by the FPU that strtod had. If it causes problems, call the function * and compile zoicheck.c with -ffloat-store. */ #define _zero_or_inf_check(x) ( x == (x/4) ) /* * Fairly portable nan check. Bitwise for i386 generated larger code. * If you have a better version, comment this out. */ #define isnan(x) (x != x) /*****************************************************************************/ /* Don't change anything that follows peroid!!! ;-) */ /*****************************************************************************/ #include /*****************************************************************************/ /* * Set things up for the scaling power table. */ #if EXP_TABLE_SIZE < 6 #error EXP_TABLE_SIZE should be at least 6 to comply with standards #endif #define EXP_TABLE_MAX (1U<<(EXP_TABLE_SIZE-1)) /* * Only bother checking if this is too small. */ #if LDBL_MAX_10_EXP/2 > EXP_TABLE_MAX #error larger EXP_TABLE_SIZE needed #endif /* * With 32 bit ints, we can get 9 digits per block. */ #define DIGITS_PER_BLOCK 9 #if UINT_MAX >= 4294967295UL #define DIGIT_BLOCK_TYPE int #define DB_FMT "%.*d" #elif LONG_MAX >= 4294967295UL #define DIGIT_BLOCK_TYPE long #define DB_FMT "%.*ld" #else #error need at least 32 bit longs #endif /* Maximum number of calls to fnprintf to output double. */ #define MAX_CALLS 8 /*****************************************************************************/ #define NUM_DIGIT_BLOCKS ((MAX_DIGITS+DIGITS_PER_BLOCK-1)/DIGITS_PER_BLOCK) /* extra space for '-', '.', 'e+###', and nul */ #define BUF_SIZE ( 3 + NUM_DIGIT_BLOCKS * DIGITS_PER_BLOCK ) /*****************************************************************************/ static const char *fmts[] = { "%0*d", "%.*s", ".", "inf", "INF", "nan", "NAN", "%*s" }; /*****************************************************************************/ size_t _dtostr(FILE * fp, long double x, struct printf_info *info) { long double exp_table[EXP_TABLE_SIZE]; long double p10; DIGIT_BLOCK_TYPE digit_block; /* int of at least 32 bits */ int i, j; int round, o_exp; int exp, exp_neg; int width, preci; char *s; char *e; char buf[BUF_SIZE]; INT_OR_PTR pc_fwi[2*MAX_CALLS]; INT_OR_PTR *ppc; char exp_buf[8]; char drvr[8]; char *pdrvr; int npc; int cnt; char sign_str[2]; char o_mode; char mode; /* check that INT_OR_PTR is sufficiently large */ assert( sizeof(INT_OR_PTR) == sizeof(char *) ); width = info->width; preci = info->prec; mode = info->spec; if (mode == 'a') { mode = 'g'; /* TODO -- fix */ } if (mode == 'A') { mode = 'G'; /* TODO -- fix */ } if (preci < 0) { preci = 6; } *sign_str = '\0'; if (PRINT_INFO_FLAG_VAL(info,showsign)) { *sign_str = '+'; } else if (PRINT_INFO_FLAG_VAL(info,space)) { *sign_str = ' '; } /* *sign_str = flag[FLAG_PLUS]; */ *(sign_str+1) = 0; if (isnan(x)) { /* nan check */ pdrvr = drvr + 1; *pdrvr++ = 5 + (mode < 'a'); pc_fwi[2] = 3; info->pad = ' '; /* flag[FLAG_0_PAD] = 0; */ goto EXIT_SPECIAL; } if (x == 0) { /* handle 0 now to avoid false positive */ exp = -1; goto GENERATE_DIGITS; } if (x < 0) { /* convert negatives to positives */ *sign_str = '-'; x = -x; } if (_zero_or_inf_check(x)) { /* must be inf since zero handled above */ pdrvr = drvr + 1; *pdrvr++ = 3 + + (mode < 'a'); pc_fwi[2] = 3; info->pad = ' '; /* flag[FLAG_0_PAD] = 0; */ goto EXIT_SPECIAL; } /* need to build the scaling table */ for (i = 0, p10 = 10 ; i < EXP_TABLE_SIZE ; i++) { exp_table[i] = p10; p10 *= p10; } exp_neg = 0; if (x < 1e8) { /* do we need to scale up or down? */ exp_neg = 1; } exp = DIGITS_PER_BLOCK - 1; i = EXP_TABLE_SIZE; j = EXP_TABLE_MAX; while ( i-- ) { /* scale x such that 1e8 <= x < 1e9 */ if (exp_neg) { if (x * exp_table[i] < 1e9) { x *= exp_table[i]; exp -= j; } } else { if (x / exp_table[i] >= 1e8) { x /= exp_table[i]; exp += j; } } j >>= 1; } if (x >= 1e9) { /* handle bad rounding case */ x /= 10; ++exp; } assert(x < 1e9); GENERATE_DIGITS: s = buf + 2; /* leave space for '\0' and '0' */ #if 1 #define ONE_E_NINE 1000000000L #else #define ONE_E_NINE 1e9 #endif for (i = 0 ; i < NUM_DIGIT_BLOCKS ; ++i ) { digit_block = (DIGIT_BLOCK_TYPE) x; x = (x - digit_block) * ONE_E_NINE; s += sprintf(s, DB_FMT, DIGITS_PER_BLOCK, digit_block); } /*************************************************************************/ *exp_buf = 'e'; if (mode < 'a') { *exp_buf = 'E'; mode += ('a' - 'A'); } o_mode = mode; round = preci; if ((mode == 'g') && (round > 0)){ --round; } if (mode == 'f') { round += exp; } s = buf; *s++ = 0; /* terminator for rounding and 0-triming */ *s = '0'; /* space to round */ i = 0; e = s + MAX_DIGITS + 1; if (round < MAX_DIGITS) { e = s + round + 2; if (*e >= '5') { i = 1; } } do { /* handle rounding and trim trailing 0s */ *--e += i; /* add the carry */ } while ((*e == '0') || (*e > '9')); o_exp = exp; if (e <= s) { /* we carried into extra digit */ ++o_exp; e = s; /* needed if all 0s */ } else { ++s; } *++e = 0; /* ending nul char */ if ((mode == 'g') && ((o_exp >= -4) && (o_exp <= round))) { mode = 'f'; } exp = o_exp; if (mode != 'f') { o_exp = 0; } if (o_exp < 0) { *--s = '0'; /* fake the first digit */ } pdrvr = drvr+1; ppc = pc_fwi+2; *pdrvr++ = 0; *ppc++ = 1; *ppc++ = (INT_OR_PTR)(*s++ - '0'); i = e - s; /* total digits */ if (o_exp >= 0) { if (o_exp >= i) { /* all digit(s) left of decimal */ *pdrvr++ = 1; *ppc++ = i; *ppc++ = (INT_OR_PTR)(s); o_exp -= i; i = 0; if (o_exp>0) { /* have 0s left of decimal */ *pdrvr++ = 0; *ppc++ = o_exp; *ppc++ = 0; } } else if (o_exp > 0) { /* decimal between digits */ *pdrvr++ = 1; *ppc++ = o_exp; *ppc++ = (INT_OR_PTR)(s); s += o_exp; i -= o_exp; } o_exp = -1; } if (PRINT_INFO_FLAG_VAL(info,alt) /* flag[FLAG_HASH] */ || (i) || ((o_mode != 'g') && (preci > 0))) { *pdrvr++ = 2; /* need decimal */ *ppc++ = 1; /* needed for width calc */ ppc++; } if (++o_exp < 0) { /* have 0s right of decimal */ *pdrvr++ = 0; *ppc++ = -o_exp; *ppc++ = 0; } if (i) { /* have digit(s) right of decimal */ *pdrvr++ = 1; *ppc++ = i; *ppc++ = (INT_OR_PTR)(s); } if (o_mode != 'g') { i -= o_exp; if (i < preci) { /* have 0s right of digits */ i = preci - i; *pdrvr++ = 0; *ppc++ = i; *ppc++ = 0; } } /* build exponent string */ if (mode != 'f') { *pdrvr++ = 1; *ppc++ = sprintf(exp_buf,"%c%+.2d", *exp_buf, exp); *ppc++ = (INT_OR_PTR) exp_buf; } EXIT_SPECIAL: npc = pdrvr - drvr; ppc = pc_fwi + 2; for (i=1 ; i< npc ; i++) { width -= *(ppc++); ppc++; } i = 0; if (*sign_str) { i = 1; } width -= i; if (width <= 0) { width = 0; } else { if (PRINT_INFO_FLAG_VAL(info,left)) { /* padding on right */ /* flag[FLAG_MINUS_LJUSTIFY] */ ++npc; *pdrvr++ = 7; *ppc = width; *++ppc = (INT_OR_PTR)(""); width = 0; } else if (info->pad == '0') { /* 0 padding */ /* (flag[FLAG_0_PAD] == '0') */ pc_fwi[2] += width; width = 0; } } *drvr = 7; ppc = pc_fwi; *ppc++ = width + i; *ppc = (INT_OR_PTR) sign_str; pdrvr = drvr; ppc = pc_fwi; cnt = 0; for (i=0 ; i *ppc) { */ /* size -= *ppc; */ /* } */ cnt += *ppc; /* to avoid problems if j == -1 */ ppc += 2; } return cnt; } #endif /**********************************************************************/ #ifdef L__store_inttype /* TODO -- right now, assumes intmax_t is either long or long long */ /* We assume int may be short or long, but short and long are different. */ void _store_inttype(register void *dest, int desttype, uintmax_t val) { if (desttype == __PA_FLAG_CHAR) { /* assume char not int */ *((unsigned char *) dest) = val; return; } #if defined(LLONG_MAX) && (LONG_MAX != LLONG_MAX) if (desttype == PA_FLAG_LONG_LONG) { *((unsigned long long int *) dest) = val; return; } #endif /* LLONG_MAX */ #if SHRT_MAX != INT_MAX if (desttype == PA_FLAG_SHORT) { *((unsigned short int *) dest) = val; return; } #endif /* SHRT_MAX */ #if LONG_MAX != INT_MAX if (desttype == PA_FLAG_LONG) { *((unsigned long int *) dest) = val; return; } #endif /* LONG_MAX */ *((unsigned int *) dest) = val; } #endif /**********************************************************************/ #ifdef L__load_inttype extern uintmax_t _load_inttype(int desttype, const void *src, int uflag) { if (uflag >= 0) { /* unsigned */ #if LONG_MAX != INT_MAX if (desttype & (PA_FLAG_LONG|PA_FLAG_LONG_LONG)) { #ifdef LLONG_MAX if (desttype == PA_FLAG_LONG_LONG) { return *((unsigned long long int *) src); } #endif return *((unsigned long int *) src); } #else /* LONG_MAX != INT_MAX */ #ifdef LLONG_MAX if (desttype & PA_FLAG_LONG_LONG) { return *((unsigned long long int *) src); } #endif #endif /* LONG_MAX != INT_MAX */ { unsigned int x; x = *((unsigned int *) src); if (desttype == __PA_FLAG_CHAR) x = (unsigned char) x; #if SHRT_MAX != INT_MAX if (desttype == PA_FLAG_SHORT) x = (unsigned short int) x; #endif return x; } } else { /* signed */ #if LONG_MAX != INT_MAX if (desttype & (PA_FLAG_LONG|PA_FLAG_LONG_LONG)) { #ifdef LLONG_MAX if (desttype == PA_FLAG_LONG_LONG) { return *((long long int *) src); } #endif return *((long int *) src); } #else /* LONG_MAX != INT_MAX */ #ifdef LLONG_MAX if (desttype & PA_FLAG_LONG_LONG) { return *((long long int *) src); } #endif #endif /* LONG_MAX != INT_MAX */ { int x; x = *((int *) src); if (desttype == __PA_FLAG_CHAR) x = (char) x; #if SHRT_MAX != INT_MAX if (desttype == PA_FLAG_SHORT) x = (short int) x; #endif return x; } } } #endif /**********************************************************************/