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-rw-r--r--klibc/klibc/vsnprintf.c433
1 files changed, 0 insertions, 433 deletions
diff --git a/klibc/klibc/vsnprintf.c b/klibc/klibc/vsnprintf.c
deleted file mode 100644
index 5cb9331954..0000000000
--- a/klibc/klibc/vsnprintf.c
+++ /dev/null
@@ -1,433 +0,0 @@
-/*
- * vsnprintf.c
- *
- * vsnprintf(), from which the rest of the printf()
- * family is built
- */
-
-#include <stdarg.h>
-#include <stddef.h>
-#include <inttypes.h>
-#include <string.h>
-#include <limits.h>
-#include <stdio.h>
-
-enum flags {
- FL_ZERO = 0x01, /* Zero modifier */
- FL_MINUS = 0x02, /* Minus modifier */
- FL_PLUS = 0x04, /* Plus modifier */
- FL_TICK = 0x08, /* ' modifier */
- FL_SPACE = 0x10, /* Space modifier */
- FL_HASH = 0x20, /* # modifier */
- FL_SIGNED = 0x40, /* Number is signed */
- FL_UPPER = 0x80 /* Upper case digits */
-};
-
-/* These may have to be adjusted on certain implementations */
-enum ranks {
- rank_char = -2,
- rank_short = -1,
- rank_int = 0,
- rank_long = 1,
- rank_longlong = 2
-};
-
-#define MIN_RANK rank_char
-#define MAX_RANK rank_longlong
-
-#define INTMAX_RANK rank_longlong
-#define SIZE_T_RANK rank_long
-#define PTRDIFF_T_RANK rank_long
-
-#define EMIT(x) ({ if (o<n){*q++ = (x);} o++; })
-
-static size_t
-format_int(char *q, size_t n, uintmax_t val, enum flags flags,
- int base, int width, int prec)
-{
- char *qq;
- size_t o = 0, oo;
- static const char lcdigits[] = "0123456789abcdef";
- static const char ucdigits[] = "0123456789ABCDEF";
- const char *digits;
- uintmax_t tmpval;
- int minus = 0;
- int ndigits = 0, nchars;
- int tickskip, b4tick;
-
- /* Select type of digits */
- digits = (flags & FL_UPPER) ? ucdigits : lcdigits;
-
- /* If signed, separate out the minus */
- if ( flags & FL_SIGNED && (intmax_t)val < 0 ) {
- minus = 1;
- val = (uintmax_t)(-(intmax_t)val);
- }
-
- /* Count the number of digits needed. This returns zero for 0. */
- tmpval = val;
- while ( tmpval ) {
- tmpval /= base;
- ndigits++;
- }
-
- /* Adjust ndigits for size of output */
-
- if ( flags & FL_HASH && base == 8 ) {
- if ( prec < ndigits+1 )
- prec = ndigits+1;
- }
-
- if ( ndigits < prec ) {
- ndigits = prec; /* Mandatory number padding */
- } else if ( val == 0 ) {
- ndigits = 1; /* Zero still requires space */
- }
-
- /* For ', figure out what the skip should be */
- if ( flags & FL_TICK ) {
- tickskip = (base == 16) ? 4 : 3;
- } else {
- tickskip = ndigits; /* No tick marks */
- }
-
- /* Tick marks aren't digits, but generated by the number converter */
- ndigits += (ndigits-1)/tickskip;
-
- /* Now compute the number of nondigits */
- nchars = ndigits;
-
- if ( minus || (flags & (FL_PLUS|FL_SPACE)) )
- nchars++; /* Need space for sign */
- if ( (flags & FL_HASH) && base == 16 ) {
- nchars += 2; /* Add 0x for hex */
- }
-
- /* Emit early space padding */
- if ( !(flags & (FL_MINUS|FL_ZERO)) && width > nchars ) {
- while ( width > nchars ) {
- EMIT(' ');
- width--;
- }
- }
-
- /* Emit nondigits */
- if ( minus )
- EMIT('-');
- else if ( flags & FL_PLUS )
- EMIT('+');
- else if ( flags & FL_SPACE )
- EMIT(' ');
-
- if ( (flags & FL_HASH) && base == 16 ) {
- EMIT('0');
- EMIT((flags & FL_UPPER) ? 'X' : 'x');
- }
-
- /* Emit zero padding */
- if ( (flags & (FL_MINUS|FL_ZERO)) == FL_ZERO && width > ndigits ) {
- while ( width > nchars ) {
- EMIT('0');
- width--;
- }
- }
-
- /* Generate the number. This is done from right to left. */
- q += ndigits; /* Advance the pointer to end of number */
- o += ndigits;
- qq = q; oo = o; /* Temporary values */
-
- b4tick = tickskip;
- while ( ndigits > 0 ) {
- if ( !b4tick-- ) {
- qq--; oo--; ndigits--;
- if ( oo < n ) *qq = '_';
- b4tick = tickskip-1;
- }
- qq--; oo--; ndigits--;
- if ( oo < n ) *qq = digits[val%base];
- val /= base;
- }
-
- /* Emit late space padding */
- while ( (flags & FL_MINUS) && width > nchars ) {
- EMIT(' ');
- width--;
- }
-
- return o;
-}
-
-
-int vsnprintf(char *buffer, size_t n, const char *format, va_list ap)
-{
- const char *p = format;
- char ch;
- char *q = buffer;
- size_t o = 0; /* Number of characters output */
- uintmax_t val = 0;
- int rank = rank_int; /* Default rank */
- int width = 0;
- int prec = -1;
- int base;
- size_t sz;
- enum flags flags = 0;
- enum {
- st_normal, /* Ground state */
- st_flags, /* Special flags */
- st_width, /* Field width */
- st_prec, /* Field precision */
- st_modifiers /* Length or conversion modifiers */
- } state = st_normal;
- const char *sarg; /* %s string argument */
- char carg; /* %c char argument */
- int slen; /* String length */
-
- while ( (ch = *p++) ) {
- switch ( state ) {
- case st_normal:
- if ( ch == '%' ) {
- state = st_flags;
- flags = 0; rank = rank_int; width = 0; prec = -1;
- } else {
- EMIT(ch);
- }
- break;
-
- case st_flags:
- switch ( ch ) {
- case '-':
- flags |= FL_MINUS;
- break;
- case '+':
- flags |= FL_PLUS;
- break;
- case '\'':
- flags |= FL_TICK;
- break;
- case ' ':
- flags |= FL_SPACE;
- break;
- case '#':
- flags |= FL_HASH;
- break;
- case '0':
- flags |= FL_ZERO;
- break;
- default:
- state = st_width;
- p--; /* Process this character again */
- break;
- }
- break;
-
- case st_width:
- if ( ch >= '0' && ch <= '9' ) {
- width = width*10+(ch-'0');
- } else if ( ch == '*' ) {
- width = va_arg(ap, int);
- if ( width < 0 ) {
- width = -width;
- flags |= FL_MINUS;
- }
- } else if ( ch == '.' ) {
- prec = 0; /* Precision given */
- state = st_prec;
- } else {
- state = st_modifiers;
- p--; /* Process this character again */
- }
- break;
-
- case st_prec:
- if ( ch >= '0' && ch <= '9' ) {
- prec = prec*10+(ch-'0');
- } else if ( ch == '*' ) {
- prec = va_arg(ap, int);
- if ( prec < 0 )
- prec = -1;
- } else {
- state = st_modifiers;
- p--; /* Process this character again */
- }
- break;
-
- case st_modifiers:
- switch ( ch ) {
- /* Length modifiers - nonterminal sequences */
- case 'h':
- rank--; /* Shorter rank */
- break;
- case 'l':
- rank++; /* Longer rank */
- break;
- case 'j':
- rank = INTMAX_RANK;
- break;
- case 'z':
- rank = SIZE_T_RANK;
- break;
- case 't':
- rank = PTRDIFF_T_RANK;
- break;
- case 'L':
- case 'q':
- rank += 2;
- break;
- default:
- /* Output modifiers - terminal sequences */
- state = st_normal; /* Next state will be normal */
- if ( rank < MIN_RANK ) /* Canonicalize rank */
- rank = MIN_RANK;
- else if ( rank > MAX_RANK )
- rank = MAX_RANK;
-
- switch ( ch ) {
- case 'P': /* Upper case pointer */
- flags |= FL_UPPER;
- /* fall through */
- case 'p': /* Pointer */
- base = 16;
- prec = (CHAR_BIT*sizeof(void *)+3)/4;
- flags |= FL_HASH;
- val = (uintmax_t)(uintptr_t)va_arg(ap, void *);
- goto is_integer;
-
- case 'd': /* Signed decimal output */
- case 'i':
- base = 10;
- flags |= FL_SIGNED;
- switch (rank) {
- case rank_char:
- /* Yes, all these casts are needed... */
- val = (uintmax_t)(intmax_t)(signed char)va_arg(ap, signed int);
- break;
- case rank_short:
- val = (uintmax_t)(intmax_t)(signed short)va_arg(ap, signed int);
- break;
- case rank_int:
- val = (uintmax_t)(intmax_t)va_arg(ap, signed int);
- break;
- case rank_long:
- val = (uintmax_t)(intmax_t)va_arg(ap, signed long);
- break;
- case rank_longlong:
- val = (uintmax_t)(intmax_t)va_arg(ap, signed long long);
- break;
- }
- goto is_integer;
- case 'o': /* Octal */
- base = 8;
- goto is_unsigned;
- case 'u': /* Unsigned decimal */
- base = 10;
- goto is_unsigned;
- case 'X': /* Upper case hexadecimal */
- flags |= FL_UPPER;
- /* fall through */
- case 'x': /* Hexadecimal */
- base = 16;
- goto is_unsigned;
-
- is_unsigned:
- switch (rank) {
- case rank_char:
- val = (uintmax_t)(unsigned char)va_arg(ap, unsigned int);
- break;
- case rank_short:
- val = (uintmax_t)(unsigned short)va_arg(ap, unsigned int);
- break;
- case rank_int:
- val = (uintmax_t)va_arg(ap, unsigned int);
- break;
- case rank_long:
- val = (uintmax_t)va_arg(ap, unsigned long);
- break;
- case rank_longlong:
- val = (uintmax_t)va_arg(ap, unsigned long long);
- break;
- }
- /* fall through */
-
- is_integer:
- sz = format_int(q, (o<n) ? n-o : 0, val, flags, base, width, prec);
- q += sz; o += sz;
- break;
-
- case 'c': /* Character */
- carg = (char)va_arg(ap, int);
- sarg = &carg;
- slen = 1;
- goto is_string;
- case 's': /* String */
- sarg = va_arg(ap, const char *);
- sarg = sarg ? sarg : "(null)";
- slen = strlen(sarg);
- goto is_string;
-
- is_string:
- {
- char sch;
- int i;
-
- if ( prec != -1 && slen > prec )
- slen = prec;
-
- if ( width > slen && !(flags & FL_MINUS) ) {
- char pad = (flags & FL_ZERO) ? '0' : ' ';
- while ( width > slen ) {
- EMIT(pad);
- width--;
- }
- }
- for ( i = slen ; i ; i-- ) {
- sch = *sarg++;
- EMIT(sch);
- }
- if ( width > slen && (flags & FL_MINUS) ) {
- while ( width > slen ) {
- EMIT(' ');
- width--;
- }
- }
- }
- break;
-
- case 'n': /* Output the number of characters written */
- {
- switch (rank) {
- case rank_char:
- *va_arg(ap, signed char *) = o;
- break;
- case rank_short:
- *va_arg(ap, signed short *) = o;
- break;
- case rank_int:
- *va_arg(ap, signed int *) = o;
- break;
- case rank_long:
- *va_arg(ap, signed long *) = o;
- break;
- case rank_longlong:
- *va_arg(ap, signed long long *) = o;
- break;
- }
- }
- break;
-
- default: /* Anything else, including % */
- EMIT(ch);
- break;
- }
- }
- }
- }
-
- /* Null-terminate the string */
- if ( o<n )
- *q = '\0'; /* No overflow */
- else if ( n>0 )
- buffer[n-1] = '\0'; /* Overflow - terminate at end of buffer */
-
- return o;
-}
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