--- /dev/null
+/* This is taken from cvslock. The same code is used in several
+ * freeware and GPLd applications. I contacted the email addresses
+ * listed in the header and have been told that the code is probably
+ * public domain, but I am still seeking confirmation from Patrick
+ * Powell. The original code was posted to BugTraq by Patrick in 1995
+ * but without any notice as to the copyright or license status.
+ *
+ * October 1998, Andrew Tridgell (tridge@samba.anu.edu.au)
+ */
+
+/**************************************************************
+ * 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.
+ *
+ **************************************************************/
+
+#include "config.h"
+
+#if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF)
+
+#include <string.h>
+# include <ctype.h>
+#include <sys/types.h>
+
+/* Define this as a fall through, HAVE_STDARG_H is probably already set */
+
+#define HAVE_VARARGS_H
+
+/* varargs declarations: */
+
+#if defined(HAVE_STDARG_H)
+# include <stdarg.h>
+# define HAVE_STDARGS /* let's hope that works everywhere (mj) */
+# define VA_LOCAL_DECL va_list ap
+# define VA_START(f) va_start(ap, f)
+# define VA_SHIFT(v,t) ; /* no-op for ANSI */
+# define VA_END va_end(ap)
+#else
+# if defined(HAVE_VARARGS_H)
+# include <varargs.h>
+# undef HAVE_STDARGS
+# define VA_LOCAL_DECL va_list ap
+# define VA_START(f) va_start(ap) /* f is ignored! */
+# define VA_SHIFT(v,t) v = va_arg(ap,t)
+# define VA_END va_end(ap)
+# else
+/*XX ** NO VARARGS ** XX*/
+# endif
+#endif
+
+/*int snprintf (char *str, size_t count, const char *fmt, ...);*/
+/*int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);*/
+
+static void dopr (char *buffer, size_t maxlen, const char *format,
+ va_list args);
+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,
+ long double fvalue, int min, int max, int flags);
+static void dopr_outch (char *buffer, size_t *currlen, size_t maxlen, char c );
+
+/*
+ * 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)
+
+/* Conversion Flags */
+#define DP_C_SHORT 1
+#define DP_C_LONG 2
+#define DP_C_LDOUBLE 3
+
+#define char_to_int(p) (p - '0')
+#define MAX(p,q) ((p >= q) ? p : q)
+
+static void dopr (char *buffer, size_t maxlen, const char *format, va_list args)
+{
+ char ch;
+ long value;
+ long double fvalue;
+ char *strvalue;
+ int min;
+ int max;
+ int state;
+ int flags;
+ int cflags;
+ size_t currlen;
+
+ state = DP_S_DEFAULT;
+ currlen = flags = cflags = min = 0;
+ max = -1;
+ ch = *format++;
+
+ while (state != DP_S_DONE)
+ {
+ if ((ch == '\0') || (currlen >= maxlen))
+ 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:
+ /* Currently, we don't support Long Long, bummer */
+ switch (ch)
+ {
+ case 'h':
+ cflags = DP_C_SHORT;
+ ch = *format++;
+ break;
+ case 'l':
+ cflags = DP_C_LONG;
+ 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, short int);
+ else if (cflags == DP_C_LONG)
+ value = va_arg (args, long int);
+ 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 short int);
+ else if (cflags == DP_C_LONG)
+ value = va_arg (args, unsigned long int);
+ else
+ value = 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 short int);
+ else if (cflags == DP_C_LONG)
+ value = va_arg (args, unsigned long int);
+ else
+ value = 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 short int);
+ else if (cflags == DP_C_LONG)
+ value = va_arg (args, unsigned long int);
+ else
+ value = 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, long double);
+ 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, long double);
+ else
+ fvalue = va_arg (args, double);
+ break;
+ case 'G':
+ flags |= DP_F_UP;
+ case 'g':
+ if (cflags == DP_C_LDOUBLE)
+ fvalue = va_arg (args, long double);
+ else
+ fvalue = va_arg (args, double);
+ break;
+ case 'c':
+ dopr_outch (buffer, &currlen, maxlen, va_arg (args, int));
+ break;
+ case 's':
+ strvalue = va_arg (args, char *);
+ if (max < 0)
+ max = maxlen; /* ie, no max */
+ fmtstr (buffer, &currlen, maxlen, strvalue, flags, min, max);
+ break;
+ case 'p':
+ 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 = 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;
+ 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 (currlen < maxlen - 1)
+ buffer[currlen] = '\0';
+ else
+ buffer[maxlen - 1] = '\0';
+}
+
+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 */
+
+#ifdef DEBUG_SNPRINTF
+ dprint (1, (debugfile, "zpad: %d, spad: %d, min: %d, max: %d, place: %d\n",
+ zpadlen, spadlen, min, max, place));
+#endif
+
+ /* Spaces */
+ while (spadlen > 0)
+ {
+ dopr_outch (buffer, currlen, maxlen, ' ');
+ --spadlen;
+ }
+
+ /* 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 long double abs_val (long double value)
+{
+ long double result = value;
+
+ if (value < 0)
+ result = -value;
+
+ return result;
+}
+
+static long double pow10 (int exp)
+{
+ long double result = 1;
+
+ while (exp)
+ {
+ result *= 10;
+ exp--;
+ }
+
+ return result;
+}
+
+static long round (long double value)
+{
+ long intpart;
+
+ intpart = value;
+ value = value - intpart;
+ if (value >= 0.5)
+ intpart++;
+
+ return intpart;
+}
+
+static void fmtfp (char *buffer, size_t *currlen, size_t maxlen,
+ long double fvalue, int min, int max, int flags)
+{
+ int signvalue = 0;
+ long double ufvalue;
+ char iconvert[20];
+ char fconvert[20];
+ int iplace = 0;
+ int fplace = 0;
+ int padlen = 0; /* amount to pad */
+ int zpadlen = 0;
+ int caps = 0;
+ long intpart;
+ long fracpart;
+
+ /*
+ * 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
+
+ intpart = ufvalue;
+
+ /*
+ * Sorry, we only support 9 digits past the decimal because of our
+ * conversion method
+ */
+ if (max > 9)
+ max = 9;
+
+ /* We "cheat" by converting the fractional part to integer by
+ * multiplying by a factor of 10
+ */
+ fracpart = round ((pow10 (max)) * (ufvalue - intpart));
+
+ if (fracpart >= pow10 (max))
+ {
+ intpart++;
+ fracpart -= pow10 (max);
+ }
+
+#ifdef DEBUG_SNPRINTF
+ dprint (1, (debugfile, "fmtfp: %f =? %d.%d\n", fvalue, intpart, fracpart));
+#endif
+
+ /* Convert integer part */
+ do {
+ iconvert[iplace++] =
+ (caps? "0123456789ABCDEF":"0123456789abcdef")[intpart % 10];
+ intpart = (intpart / 10);
+ } while(intpart && (iplace < 20));
+ if (iplace == 20) iplace--;
+ iconvert[iplace] = 0;
+
+ /* Convert fractional part */
+ do {
+ fconvert[fplace++] =
+ (caps? "0123456789ABCDEF":"0123456789abcdef")[fracpart % 10];
+ fracpart = (fracpart / 10);
+ } while(fracpart && (fplace < 20));
+ if (fplace == 20) 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.
+ */
+ dopr_outch (buffer, currlen, maxlen, '.');
+
+ while (fplace > 0)
+ dopr_outch (buffer, currlen, maxlen, fconvert[--fplace]);
+
+ while (zpadlen > 0)
+ {
+ dopr_outch (buffer, currlen, maxlen, '0');
+ --zpadlen;
+ }
+
+ 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;
+}
+#endif /* !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) */
+
+#ifndef HAVE_VSNPRINTF
+int vsnprintf (char *str, size_t count, const char *fmt, va_list args)
+{
+ str[0] = 0;
+ dopr(str, count, fmt, args);
+ return(strlen(str));
+}
+#endif /* !HAVE_VSNPRINTF */
+
+#ifndef HAVE_SNPRINTF
+/* VARARGS3 */
+#ifdef HAVE_STDARGS
+int snprintf (char *str,size_t count,const char *fmt,...)
+#else
+int snprintf (va_alist) va_dcl
+#endif
+{
+#ifndef HAVE_STDARGS
+ char *str;
+ size_t count;
+ char *fmt;
+#endif
+ VA_LOCAL_DECL;
+
+ VA_START (fmt);
+ VA_SHIFT (str, char *);
+ VA_SHIFT (count, size_t );
+ VA_SHIFT (fmt, char *);
+ (void) vsnprintf(str, count, fmt, ap);
+ VA_END;
+ return(strlen(str));
+}
+
+#ifdef TEST_SNPRINTF
+#ifndef LONG_STRING
+#define LONG_STRING 1024
+#endif
+int main (void)
+{
+ char buf1[LONG_STRING];
+ char buf2[LONG_STRING];
+ char *fp_fmt[] = {
+ "%-1.5f",
+ "%1.5f",
+ "%123.9f",
+ "%10.5f",
+ "% 10.5f",
+ "%+22.9f",
+ "%+4.9f",
+ "%01.3f",
+ "%4f",
+ "%3.1f",
+ "%3.2f",
+ NULL
+ };
+ double fp_nums[] = { -1.5, 134.21, 91340.2, 341.1234, 0203.9, 0.96, 0.996,
+ 0.9996, 1.996, 4.136, 0};
+ char *int_fmt[] = {
+ "%-1.5d",
+ "%1.5d",
+ "%123.9d",
+ "%5.5d",
+ "%10.5d",
+ "% 10.5d",
+ "%+22.33d",
+ "%01.3d",
+ "%4d",
+ NULL
+ };
+ long int_nums[] = { -1, 134, 91340, 341, 0203, 0};
+ int x, y;
+ int fail = 0;
+ int num = 0;
+
+ printf ("Testing snprintf format codes against system sprintf...\n");
+
+ for (x = 0; fp_fmt[x] != NULL ; x++)
+ for (y = 0; fp_nums[y] != 0 ; y++)
+ {
+ snprintf (buf1, sizeof (buf1), fp_fmt[x], fp_nums[y]);
+ sprintf (buf2, fp_fmt[x], fp_nums[y]);
+ if (strcmp (buf1, buf2))
+ {
+ printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n",
+ fp_fmt[x], buf1, buf2);
+ fail++;
+ }
+ num++;
+ }
+
+ for (x = 0; int_fmt[x] != NULL ; x++)
+ for (y = 0; int_nums[y] != 0 ; y++)
+ {
+ snprintf (buf1, sizeof (buf1), int_fmt[x], int_nums[y]);
+ sprintf (buf2, int_fmt[x], int_nums[y]);
+ if (strcmp (buf1, buf2))
+ {
+ printf("snprintf doesn't match Format: %s\n\tsnprintf = %s\n\tsprintf = %s\n",
+ int_fmt[x], buf1, buf2);
+ fail++;
+ }
+ num++;
+ }
+ printf ("%d tests failed out of %d.\n", fail, num);
+}
+#endif /* SNPRINTF_TEST */
+
+#else
+ /* keep compilers happy about empty files */
+ void dummy_snprintf(void) {}
+#endif /* !HAVE_SNPRINTF */
git.samba.org / samba.git / commitdiff