+++ /dev/null
-/*
- * Copyright Patrick Powell 1995
- * This code is based on code written by Patrick Powell (papowell@astart.com)
- * It may be used for any purpose as long as this notice remains intact
- * on all source code distributions
- */
-
-/**************************************************************
- * Original:
- * Patrick Powell Tue Apr 11 09:48:21 PDT 1995
- * A bombproof version of doprnt (dopr) included.
- * Sigh. This sort of thing is always nasty do deal with. Note that
- * the version here does not include floating point...
- *
- * snprintf() is used instead of sprintf() as it does limit checks
- * for string length. This covers a nasty loophole.
- *
- * The other functions are there to prevent NULL pointers from
- * causing nast effects.
- *
- * More Recently:
- * Brandon Long <blong@fiction.net> 9/15/96 for mutt 0.43
- * This was ugly. It is still ugly. I opted out of floating point
- * numbers, but the formatter understands just about everything
- * from the normal C string format, at least as far as I can tell from
- * the Solaris 2.5 printf(3S) man page.
- *
- * Brandon Long <blong@fiction.net> 10/22/97 for mutt 0.87.1
- * Ok, added some minimal floating point support, which means this
- * probably requires libm on most operating systems. Don't yet
- * support the exponent (e,E) and sigfig (g,G). Also, fmtint()
- * was pretty badly broken, it just wasn't being exercised in ways
- * which showed it, so that's been fixed. Also, formated the code
- * to mutt conventions, and removed dead code left over from the
- * original. Also, there is now a builtin-test, just compile with:
- * gcc -DTEST_SNPRINTF -o snprintf snprintf.c -lm
- * and run snprintf for results.
- *
- * Thomas Roessler <roessler@guug.de> 01/27/98 for mutt 0.89i
- * The PGP code was using unsigned hexadecimal formats.
- * Unfortunately, unsigned formats simply didn't work.
- *
- * Michael Elkins <me@cs.hmc.edu> 03/05/98 for mutt 0.90.8
- * The original code assumed that both snprintf() and vsnprintf() were
- * missing. Some systems only have snprintf() but not vsnprintf(), so
- * the code is now broken down under HAVE_SNPRINTF and HAVE_VSNPRINTF.
- *
- * Andrew Tridgell (tridge@samba.org) Oct 1998
- * fixed handling of %.0f
- * added test for HAVE_LONG_DOUBLE
- *
- * tridge@samba.org, idra@samba.org, April 2001
- * got rid of fcvt code (twas buggy and made testing harder)
- * added C99 semantics
- *
- **************************************************************/
-
-#include "silc.h"
-
-#ifdef HAVE_LONG_DOUBLE
-#define LDOUBLE long double
-#else
-#define LDOUBLE double
-#endif
-
-#ifdef HAVE_LONG_LONG
-#define LLONG long long
-#else
-#define LLONG long
-#endif
-
-/*
- * dopr(): poor man's version of doprintf
- */
-
-/* format read states */
-#define DP_S_DEFAULT 0
-#define DP_S_FLAGS 1
-#define DP_S_MIN 2
-#define DP_S_DOT 3
-#define DP_S_MAX 4
-#define DP_S_MOD 5
-#define DP_S_CONV 6
-#define DP_S_DONE 7
-
-/* format flags - Bits */
-#define DP_F_MINUS (1 << 0)
-#define DP_F_PLUS (1 << 1)
-#define DP_F_SPACE (1 << 2)
-#define DP_F_NUM (1 << 3)
-#define DP_F_ZERO (1 << 4)
-#define DP_F_UP (1 << 5)
-#define DP_F_UNSIGNED (1 << 6)
-#define DP_F_HEXPREFIX (1 << 7)
-
-/* Conversion Flags */
-#define DP_C_SHORT 1
-#define DP_C_LONG 2
-#define DP_C_LDOUBLE 3
-#define DP_C_LLONG 4
-
-#define char_to_int(p) ((p)- '0')
-#ifndef MAX
-#define MAX(p,q) (((p) >= (q)) ? (p) : (q))
-#endif
-
-static size_t dopr(char *buffer, size_t maxlen, const char *format,
- va_list args_in);
-static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
- char *value, int flags, int min, int max);
-static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
- long value, int base, int min, int max, int flags);
-static void fmtfp(char *buffer, size_t *currlen, size_t maxlen,
- LDOUBLE fvalue, int min, int max, int flags);
-static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c);
-
-static size_t dopr(char *buffer, size_t maxlen, const char *format,
- va_list args_in)
-{
- char ch;
- LLONG value;
- LDOUBLE fvalue;
- char *strvalue;
- int min;
- int max;
- int state;
- int flags;
- int cflags;
- size_t currlen;
- va_list args;
- SilcSnprintfRender render;
-
- silc_va_copy(args, args_in);
-
- state = DP_S_DEFAULT;
- currlen = flags = cflags = min = 0;
- max = -1;
- ch = *format++;
-
- while (state != DP_S_DONE) {
- if (ch == '\0')
- state = DP_S_DONE;
-
- switch(state) {
- case DP_S_DEFAULT:
- if (ch == '%')
- state = DP_S_FLAGS;
- else
- dopr_outch (buffer, &currlen, maxlen, ch);
- ch = *format++;
- break;
- case DP_S_FLAGS:
- switch (ch) {
- case '-':
- flags |= DP_F_MINUS;
- ch = *format++;
- break;
- case '+':
- flags |= DP_F_PLUS;
- ch = *format++;
- break;
- case ' ':
- flags |= DP_F_SPACE;
- ch = *format++;
- break;
- case '#':
- flags |= DP_F_NUM;
- ch = *format++;
- break;
- case '0':
- flags |= DP_F_ZERO;
- ch = *format++;
- break;
- default:
- state = DP_S_MIN;
- break;
- }
- break;
- case DP_S_MIN:
- if (isdigit((unsigned char)ch)) {
- min = 10*min + char_to_int (ch);
- ch = *format++;
- } else if (ch == '*') {
- min = va_arg (args, int);
- ch = *format++;
- state = DP_S_DOT;
- } else {
- state = DP_S_DOT;
- }
- break;
- case DP_S_DOT:
- if (ch == '.') {
- state = DP_S_MAX;
- ch = *format++;
- } else {
- state = DP_S_MOD;
- }
- break;
- case DP_S_MAX:
- if (isdigit((unsigned char)ch)) {
- if (max < 0)
- max = 0;
- max = 10*max + char_to_int (ch);
- ch = *format++;
- } else if (ch == '*') {
- max = va_arg (args, int);
- ch = *format++;
- state = DP_S_MOD;
- } else {
- state = DP_S_MOD;
- }
- break;
- case DP_S_MOD:
- switch (ch) {
- case 'h':
- cflags = DP_C_SHORT;
- ch = *format++;
- break;
- case 'l':
- cflags = DP_C_LONG;
- ch = *format++;
- if (ch == 'l') { /* It's a long long */
- cflags = DP_C_LLONG;
- ch = *format++;
- }
- break;
- case 'L':
- cflags = DP_C_LDOUBLE;
- ch = *format++;
- break;
- default:
- break;
- }
- state = DP_S_CONV;
- break;
- case DP_S_CONV:
- switch (ch) {
- case 'd':
- case 'i':
- if (cflags == DP_C_SHORT)
- value = va_arg (args, int);
- else if (cflags == DP_C_LONG)
- value = va_arg (args, long int);
- else if (cflags == DP_C_LLONG)
- value = va_arg (args, LLONG);
- else
- value = va_arg (args, int);
- fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
- break;
- case 'o':
- flags |= DP_F_UNSIGNED;
- if (cflags == DP_C_SHORT)
- value = va_arg (args, unsigned int);
- else if (cflags == DP_C_LONG)
- value = (long)va_arg (args, unsigned long int);
- else if (cflags == DP_C_LLONG)
- value = (long)va_arg (args, unsigned LLONG);
- else
- value = (long)va_arg (args, unsigned int);
- fmtint (buffer, &currlen, maxlen, value, 8, min, max, flags);
- break;
- case 'u':
- flags |= DP_F_UNSIGNED;
- if (cflags == DP_C_SHORT)
- value = va_arg (args, unsigned int);
- else if (cflags == DP_C_LONG)
- value = (long)va_arg (args, unsigned long int);
- else if (cflags == DP_C_LLONG)
- value = (LLONG)va_arg (args, unsigned LLONG);
- else
- value = (long)va_arg (args, unsigned int);
- fmtint (buffer, &currlen, maxlen, value, 10, min, max, flags);
- break;
- case 'X':
- flags |= DP_F_UP;
- case 'x':
- flags |= DP_F_UNSIGNED;
- if (cflags == DP_C_SHORT)
- value = va_arg (args, unsigned int);
- else if (cflags == DP_C_LONG)
- value = (long)va_arg (args, unsigned long int);
- else if (cflags == DP_C_LLONG)
- value = (LLONG)va_arg (args, unsigned LLONG);
- else
- value = (long)va_arg (args, unsigned int);
- fmtint (buffer, &currlen, maxlen, value, 16, min, max, flags);
- break;
- case 'f':
- if (cflags == DP_C_LDOUBLE)
- fvalue = va_arg (args, LDOUBLE);
- else
- fvalue = va_arg (args, double);
- /* um, floating point? */
- fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
- break;
- case 'E':
- flags |= DP_F_UP;
- case 'e':
- if (cflags == DP_C_LDOUBLE)
- fvalue = va_arg (args, LDOUBLE);
- else
- fvalue = va_arg (args, double);
- fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
- break;
- case 'G':
- flags |= DP_F_UP;
- case 'g':
- if (cflags == DP_C_LDOUBLE)
- fvalue = va_arg (args, LDOUBLE);
- else
- fvalue = va_arg (args, double);
- fmtfp (buffer, &currlen, maxlen, fvalue, min, max, flags);
- break;
- case 'c':
- dopr_outch (buffer, &currlen, maxlen, va_arg (args, int));
- break;
- case 's':
- strvalue = va_arg (args, char *);
- if (!strvalue) strvalue = "(NULL)";
- if (max == -1) {
- max = strlen(strvalue);
- }
- if (min > 0 && max >= 0 && min > max) max = min;
- fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max);
- break;
- case 'p':
- flags |= (DP_F_UNSIGNED | DP_F_HEXPREFIX);
- strvalue = va_arg (args, void *);
- fmtint (buffer, &currlen, maxlen, (long )strvalue, 16, min, max,
- flags);
- break;
- case 'n':
- if (cflags == DP_C_SHORT) {
- short int *num;
- num = va_arg (args, short int *);
- *num = currlen;
- } else if (cflags == DP_C_LONG) {
- long int *num;
- num = va_arg (args, long int *);
- *num = (long int)currlen;
- } else if (cflags == DP_C_LLONG) {
- LLONG *num;
- num = va_arg (args, LLONG *);
- *num = (LLONG)currlen;
- } else {
- int *num;
- num = va_arg (args, int *);
- *num = currlen;
- }
- break;
- case '%':
- dopr_outch (buffer, &currlen, maxlen, ch);
- break;
- case 'w':
- /* not supported yet, treat as next char */
- ch = *format++;
- break;
- case '@':
- /* Renderer function */
- render = va_arg (args, SilcSnprintfRender);
- if (render) {
- void *ptr = va_arg (args, void *);
- if (ptr) {
- strvalue = render (ptr);
- if (strvalue) {
- if (max == -1)
- max = strlen(strvalue);
- if (min > 0 && max >= 0 && min > max) max = min;
- fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max);
- silc_free(strvalue);
- }
- }
- }
- break;
- default:
- /* Unknown, skip */
- break;
- }
- ch = *format++;
- state = DP_S_DEFAULT;
- flags = cflags = min = 0;
- max = -1;
- break;
- case DP_S_DONE:
- break;
- default:
- /* hmm? */
- break; /* some picky compilers need this */
- }
- }
- if (maxlen != 0) {
- if (currlen < maxlen - 1)
- buffer[currlen] = '\0';
- else if (maxlen > 0)
- buffer[maxlen - 1] = '\0';
- }
-
- return currlen;
-}
-
-static void fmtstr(char *buffer, size_t *currlen, size_t maxlen,
- char *value, int flags, int min, int max)
-{
- int padlen, strln; /* amount to pad */
- int cnt = 0;
-
- if (value == 0) {
- value = "<NULL>";
- }
-
- for (strln = 0; value[strln]; ++strln); /* strlen */
- padlen = min - strln;
- if (padlen < 0)
- padlen = 0;
- if (flags & DP_F_MINUS)
- padlen = -padlen; /* Left Justify */
-
- while ((padlen > 0) && (cnt < max)) {
- dopr_outch (buffer, currlen, maxlen, ' ');
- --padlen;
- ++cnt;
- }
- while (*value && (cnt < max)) {
- dopr_outch (buffer, currlen, maxlen, *value++);
- ++cnt;
- }
- while ((padlen < 0) && (cnt < max)) {
- dopr_outch (buffer, currlen, maxlen, ' ');
- ++padlen;
- ++cnt;
- }
-}
-
-/* Have to handle DP_F_NUM (ie 0x and 0 alternates) */
-
-static void fmtint(char *buffer, size_t *currlen, size_t maxlen,
- long value, int base, int min, int max, int flags)
-{
- int signvalue = 0;
- unsigned long uvalue;
- char convert[20];
- int place = 0;
- int spadlen = 0; /* amount to space pad */
- int zpadlen = 0; /* amount to zero pad */
- int caps = 0;
-
- if (max < 0)
- max = 0;
-
- uvalue = value;
-
- if(!(flags & DP_F_UNSIGNED)) {
- if( value < 0 ) {
- signvalue = '-';
- uvalue = -value;
- } else {
- if (flags & DP_F_PLUS) /* Do a sign (+/i) */
- signvalue = '+';
- else if (flags & DP_F_SPACE)
- signvalue = ' ';
- }
- }
-
- if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
-
- do {
- convert[place++] =
- (caps? "0123456789ABCDEF":"0123456789abcdef")
- [uvalue % (unsigned)base ];
- uvalue = (uvalue / (unsigned)base );
- } while(uvalue && (place < 20));
- if (place == 20) place--;
- convert[place] = 0;
-
- zpadlen = max - place;
- spadlen = min - MAX (max, place) - (signvalue ? 1 : 0);
- if (zpadlen < 0) zpadlen = 0;
- if (spadlen < 0) spadlen = 0;
- if (flags & DP_F_ZERO) {
- zpadlen = MAX(zpadlen, spadlen);
- spadlen = 0;
- }
- if (flags & DP_F_MINUS)
- spadlen = -spadlen; /* Left Justifty */
-
- /* Spaces */
- while (spadlen > 0) {
- dopr_outch (buffer, currlen, maxlen, ' ');
- --spadlen;
- }
-
- /* 0x prefix */
- if (flags & DP_F_HEXPREFIX) {
- dopr_outch (buffer, currlen, maxlen, '0');
- dopr_outch (buffer, currlen, maxlen, 'x');
- }
-
- /* Sign */
- if (signvalue)
- dopr_outch (buffer, currlen, maxlen, signvalue);
-
- /* Zeros */
- if (zpadlen > 0) {
- while (zpadlen > 0) {
- dopr_outch (buffer, currlen, maxlen, '0');
- --zpadlen;
- }
- }
-
- /* Digits */
- while (place > 0)
- dopr_outch (buffer, currlen, maxlen, convert[--place]);
-
- /* Left Justified spaces */
- while (spadlen < 0) {
- dopr_outch (buffer, currlen, maxlen, ' ');
- ++spadlen;
- }
-}
-
-static LDOUBLE abs_val(LDOUBLE value)
-{
- LDOUBLE result = value;
-
- if (value < 0)
- result = -value;
-
- return result;
-}
-
-static LDOUBLE POW10(int exp)
-{
- LDOUBLE result = 1;
-
- while (exp) {
- result *= 10;
- exp--;
- }
-
- return result;
-}
-
-static LLONG ROUND(LDOUBLE value)
-{
- LLONG intpart;
-
- intpart = (LLONG)value;
- value = value - intpart;
- if (value >= 0.5) intpart++;
-
- return intpart;
-}
-
-/* a replacement for modf that doesn't need the math library. Should
- be portable, but slow */
-static double my_modf(double x0, double *iptr)
-{
- int i;
- long l;
- double x = x0;
- double f = 1.0;
-
- for (i=0;i<100;i++) {
- l = (long)x;
- if (l <= (x+1) && l >= (x-1)) break;
- x *= 0.1;
- f *= 10.0;
- }
-
- if (i == 100) {
- /* yikes! the number is beyond what we can handle.
- What do we do? */
- (*iptr) = 0;
- return 0;
- }
-
- if (i != 0) {
- double i2;
- double ret;
-
- ret = my_modf(x0-l*f, &i2);
- (*iptr) = l*f + i2;
- return ret;
- }
-
- (*iptr) = l;
- return x - (*iptr);
-}
-
-
-static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
- LDOUBLE fvalue, int min, int max, int flags)
-{
- int signvalue = 0;
- double ufvalue;
- char iconvert[311];
- char fconvert[311];
- int iplace = 0;
- int fplace = 0;
- int padlen = 0; /* amount to pad */
- int zpadlen = 0;
- int caps = 0;
- int idx;
- double intpart;
- double fracpart;
- double temp;
-
- /*
- * AIX manpage says the default is 0, but Solaris says the default
- * is 6, and sprintf on AIX defaults to 6
- */
- if (max < 0)
- max = 6;
-
- ufvalue = abs_val (fvalue);
-
- if (fvalue < 0) {
- signvalue = '-';
- } else {
- if (flags & DP_F_PLUS) { /* Do a sign (+/i) */
- signvalue = '+';
- } else {
- if (flags & DP_F_SPACE)
- signvalue = ' ';
- }
- }
-
-#if 0
- if (flags & DP_F_UP) caps = 1; /* Should characters be upper case? */
-#endif
-
-#if 0
- if (max == 0) ufvalue += 0.5; /* if max = 0 we must round */
-#endif
-
- /*
- * Sorry, we only support 16 digits past the decimal because of our
- * conversion method
- */
- if (max > 16)
- max = 16;
-
- /* We "cheat" by converting the fractional part to integer by
- * multiplying by a factor of 10
- */
-
- temp = ufvalue;
- my_modf(temp, &intpart);
-
- fracpart = ROUND((POW10(max)) * (ufvalue - intpart));
-
- if (fracpart >= POW10(max)) {
- intpart++;
- fracpart -= POW10(max);
- }
-
-
- /* Convert integer part */
- do {
- temp = intpart*0.1;
- my_modf(temp, &intpart);
- idx = (int) ((temp -intpart +0.05)* 10.0);
- /* idx = (int) (((double)(temp*0.1) -intpart +0.05) *10.0); */
- /* printf ("%llf, %f, %x\n", temp, intpart, idx); */
- iconvert[iplace++] =
- (caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
- } while (intpart && (iplace < 311));
- if (iplace == 311) iplace--;
- iconvert[iplace] = 0;
-
- /* Convert fractional part */
- if (fracpart)
- {
- do {
- temp = fracpart*0.1;
- my_modf(temp, &fracpart);
- idx = (int) ((temp -fracpart +0.05)* 10.0);
- /* idx = (int) ((((temp/10) -fracpart) +0.05) *10); */
- /* printf ("%lf, %lf, %ld\n", temp, fracpart, idx ); */
- fconvert[fplace++] =
- (caps? "0123456789ABCDEF":"0123456789abcdef")[idx];
- } while(fracpart && (fplace < 311));
- if (fplace == 311) fplace--;
- }
- fconvert[fplace] = 0;
-
- /* -1 for decimal point, another -1 if we are printing a sign */
- padlen = min - iplace - max - 1 - ((signvalue) ? 1 : 0);
- zpadlen = max - fplace;
- if (zpadlen < 0) zpadlen = 0;
- if (padlen < 0)
- padlen = 0;
- if (flags & DP_F_MINUS)
- padlen = -padlen; /* Left Justifty */
-
- if ((flags & DP_F_ZERO) && (padlen > 0)) {
- if (signvalue) {
- dopr_outch (buffer, currlen, maxlen, signvalue);
- --padlen;
- signvalue = 0;
- }
- while (padlen > 0) {
- dopr_outch (buffer, currlen, maxlen, '0');
- --padlen;
- }
- }
- while (padlen > 0) {
- dopr_outch (buffer, currlen, maxlen, ' ');
- --padlen;
- }
- if (signvalue)
- dopr_outch (buffer, currlen, maxlen, signvalue);
-
- while (iplace > 0)
- dopr_outch (buffer, currlen, maxlen, iconvert[--iplace]);
-
- /*
- * Decimal point. This should probably use locale to find the correct
- * char to print out.
- */
- if (max > 0) {
- dopr_outch (buffer, currlen, maxlen, '.');
-
- while (zpadlen > 0) {
- dopr_outch (buffer, currlen, maxlen, '0');
- --zpadlen;
- }
-
- while (fplace > 0)
- dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
- }
-
- while (padlen < 0) {
- dopr_outch (buffer, currlen, maxlen, ' ');
- ++padlen;
- }
-}
-
-static void dopr_outch(char *buffer, size_t *currlen, size_t maxlen, char c)
-{
- if (*currlen < maxlen) {
- buffer[(*currlen)] = c;
- }
- (*currlen)++;
-}
-
-int silc_vsnprintf(char *str, size_t count, const char *fmt, va_list args)
-{
- if (str != NULL)
- str[0] = 0;
- return dopr(str, count, fmt, args);
-}
-
-int silc_snprintf(char *str, size_t count, const char *fmt, ...)
-{
- size_t ret;
- va_list ap;
-
- va_start(ap, fmt);
- ret = silc_vsnprintf(str, count, fmt, ap);
- va_end(ap);
- return ret;
-}
-
-int silc_vasprintf(char **ptr, const char *format, va_list ap)
-{
- int ret;
- va_list ap2;
-
- silc_va_copy(ap2, ap);
-
- ret = silc_vsnprintf(NULL, 0, format, ap2);
- if (ret <= 0) return ret;
-
- (*ptr) = (char *)silc_malloc(ret+1);
- if (!*ptr) return -1;
-
- silc_va_copy(ap2, ap);
-
- ret = silc_vsnprintf(*ptr, ret+1, format, ap2);
-
- return ret;
-}
-
-int silc_asprintf(char **ptr, const char *format, ...)
-{
- va_list ap;
- int ret;
-
- *ptr = NULL;
- va_start(ap, format);
- ret = silc_vasprintf(ptr, format, ap);
- va_end(ap);
-
- return ret;
-}
projects / crypto.git / blobdiff