/* * NOTE: If you change this file, please merge it into rsync, samba, etc. */ /* * 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 * * date: 2002/12/19 19:56:31; author: herb; state: Exp; lines: +2 -0 * actually print args for %g and %e * * date: 2002/06/03 13:37:52; author: jmcd; state: Exp; lines: +8 -0 * Since includes.h isn't included here, VA_COPY has to be defined here. I don't * see any include file that is guaranteed to be here, so I'm defining it * locally. Fixes AIX and Solaris builds. * * date: 2002/06/03 03:07:24; author: tridge; state: Exp; lines: +5 -13 * put the ifdef for HAVE_VA_COPY in one place rather than in lots of * functions * * date: 2002/05/17 14:51:22; author: jmcd; state: Exp; lines: +21 -4 * Fix usage of va_list passed as an arg. Use __va_copy before using it * when it exists. * * date: 2002/04/16 22:38:04; author: idra; state: Exp; lines: +20 -14 * Fix incorrect zpadlen handling in fmtfp. * Thanks to Ollie Oldham <ollie.oldham@metro-optix.com> for spotting it. * few mods to make it easier to compile the tests. * addedd the "Ollie" test to the floating point ones. * * Martin Pool (mbp@samba.org) April 2003 * Remove NO_CONFIG_H so that the test case can be built within a source * tree with less trouble. * Remove unnecessary SAFE_FREE() definition. * * Martin Pool (mbp@samba.org) May 2003 * Put in a prototype for dummy_snprintf() to quiet compiler warnings. * * Move #endif to make sure VA_COPY, LDOUBLE, etc are defined even * if the C library has some snprintf functions already. * * Darren Tucker (dtucker@zip.com.au) 2005 * Fix bug allowing read overruns of the source string with "%.*s" * Usually harmless unless the read runs outside the process' allocation * (eg if your malloc does guard pages) in which case it will segfault. * From OpenSSH. Also added test for same. * * Simo Sorce (idra@samba.org) Jan 2006 * * Add support for position independent parameters * fix fmtstr now it conforms to sprintf wrt min.max * **************************************************************/ #include "replace.h" #include "system/locale.h" #ifdef TEST_SNPRINTF /* need math library headers for testing */ /* In test mode, we pretend that this system doesn't have any snprintf * functions, regardless of what config.h says. */ # undef HAVE_SNPRINTF # undef HAVE_VSNPRINTF # undef HAVE_C99_VSNPRINTF # undef HAVE_ASPRINTF # undef HAVE_VASPRINTF # include <math.h> #endif /* TEST_SNPRINTF */ #if defined(HAVE_SNPRINTF) && defined(HAVE_VSNPRINTF) && defined(HAVE_C99_VSNPRINTF) /* only include stdio.h if we are not re-defining snprintf or vsnprintf */ #include <stdio.h> /* make the compiler happy with an empty file */ void dummy_snprintf(void); void dummy_snprintf(void) {} #endif /* HAVE_SNPRINTF, etc */ /* yes this really must be a ||. Don't muck with this (tridge) */ #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF) #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 #ifndef VA_COPY #ifdef HAVE_VA_COPY #define VA_COPY(dest, src) va_copy(dest, src) #else #ifdef HAVE___VA_COPY #define VA_COPY(dest, src) __va_copy(dest, src) #else #define VA_COPY(dest, src) (dest) = (src) #endif #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) /* Conversion Flags */ #define DP_C_CHAR 1 #define DP_C_SHORT 2 #define DP_C_LONG 3 #define DP_C_LDOUBLE 4 #define DP_C_LLONG 5 #define DP_C_SIZET 6 /* Chunk types */ #define CNK_FMT_STR 0 #define CNK_INT 1 #define CNK_OCTAL 2 #define CNK_UINT 3 #define CNK_HEX 4 #define CNK_FLOAT 5 #define CNK_CHAR 6 #define CNK_STRING 7 #define CNK_PTR 8 #define CNK_NUM 9 #define CNK_PRCNT 10 #define char_to_int(p) ((p)- '0') #ifndef MAX #define MAX(p,q) (((p) >= (q)) ? (p) : (q)) #endif struct pr_chunk { int type; /* chunk type */ int num; /* parameter number */ int min; int max; int flags; int cflags; int start; int len; LLONG value; LDOUBLE fvalue; char *strvalue; void *pnum; struct pr_chunk *min_star; struct pr_chunk *max_star; struct pr_chunk *next; }; struct pr_chunk_x { struct pr_chunk **chunks; int num; }; static int 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, LLONG 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 struct pr_chunk *new_chunk(void); static int add_cnk_list_entry(struct pr_chunk_x **list, int max_num, struct pr_chunk *chunk); static int dopr(char *buffer, size_t maxlen, const char *format, va_list args_in) { char ch; int state; int pflag; int pnum; int pfirst; size_t currlen; va_list args; const char *base; struct pr_chunk *chunks = NULL; struct pr_chunk *cnk = NULL; struct pr_chunk_x *clist = NULL; int max_pos; int ret = -1; VA_COPY(args, args_in); state = DP_S_DEFAULT; pfirst = 1; pflag = 0; pnum = 0; max_pos = 0; base = format; ch = *format++; /* retrieve the string structure as chunks */ while (state != DP_S_DONE) { if (ch == '\0') state = DP_S_DONE; switch(state) { case DP_S_DEFAULT: if (cnk) { cnk->next = new_chunk(); cnk = cnk->next; } else { cnk = new_chunk(); } if (!cnk) goto done; if (!chunks) chunks = cnk; if (ch == '%') { state = DP_S_FLAGS; ch = *format++; } else { cnk->type = CNK_FMT_STR; cnk->start = format - base -1; while ((ch != '\0') && (ch != '%')) ch = *format++; cnk->len = format - base - cnk->start -1; } break; case DP_S_FLAGS: switch (ch) { case '-': cnk->flags |= DP_F_MINUS; ch = *format++; break; case '+': cnk->flags |= DP_F_PLUS; ch = *format++; break; case ' ': cnk->flags |= DP_F_SPACE; ch = *format++; break; case '#': cnk->flags |= DP_F_NUM; ch = *format++; break; case '0': cnk->flags |= DP_F_ZERO; ch = *format++; break; case 'I': /* internationalization not supported yet */ ch = *format++; break; default: state = DP_S_MIN; break; } break; case DP_S_MIN: if (isdigit((unsigned char)ch)) { cnk->min = 10 * cnk->min + char_to_int (ch); ch = *format++; } else if (ch == '$') { if (!pfirst && !pflag) { /* parameters must be all positioned or none */ goto done; } if (pfirst) { pfirst = 0; pflag = 1; } if (cnk->min == 0) /* what ?? */ goto done; cnk->num = cnk->min; cnk->min = 0; ch = *format++; } else if (ch == '*') { if (pfirst) pfirst = 0; cnk->min_star = new_chunk(); if (!cnk->min_star) /* out of memory :-( */ goto done; cnk->min_star->type = CNK_INT; if (pflag) { int num; ch = *format++; if (!isdigit((unsigned char)ch)) { /* parameters must be all positioned or none */ goto done; } for (num = 0; isdigit((unsigned char)ch); ch = *format++) { num = 10 * num + char_to_int(ch); } cnk->min_star->num = num; if (ch != '$') /* what ?? */ goto done; } else { cnk->min_star->num = ++pnum; } max_pos = add_cnk_list_entry(&clist, max_pos, cnk->min_star); if (max_pos == 0) /* out of memory :-( */ goto done; ch = *format++; state = DP_S_DOT; } else { if (pfirst) pfirst = 0; 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 (cnk->max < 0) cnk->max = 0; cnk->max = 10 * cnk->max + char_to_int (ch); ch = *format++; } else if (ch == '$') { if (!pfirst && !pflag) { /* parameters must be all positioned or none */ goto done; } if (cnk->max <= 0) /* what ?? */ goto done; cnk->num = cnk->max; cnk->max = -1; ch = *format++; } else if (ch == '*') { cnk->max_star = new_chunk(); if (!cnk->max_star) /* out of memory :-( */ goto done; cnk->max_star->type = CNK_INT; if (pflag) { int num; ch = *format++; if (!isdigit((unsigned char)ch)) { /* parameters must be all positioned or none */ goto done; } for (num = 0; isdigit((unsigned char)ch); ch = *format++) { num = 10 * num + char_to_int(ch); } cnk->max_star->num = num; if (ch != '$') /* what ?? */ goto done; } else { cnk->max_star->num = ++pnum; } max_pos = add_cnk_list_entry(&clist, max_pos, cnk->max_star); if (max_pos == 0) /* out of memory :-( */ goto done; ch = *format++; state = DP_S_MOD; } else { state = DP_S_MOD; } break; case DP_S_MOD: switch (ch) { case 'h': cnk->cflags = DP_C_SHORT; ch = *format++; if (ch == 'h') { cnk->cflags = DP_C_CHAR; ch = *format++; } break; case 'l': cnk->cflags = DP_C_LONG; ch = *format++; if (ch == 'l') { /* It's a long long */ cnk->cflags = DP_C_LLONG; ch = *format++; } break; case 'L': cnk->cflags = DP_C_LDOUBLE; ch = *format++; break; case 'z': cnk->cflags = DP_C_SIZET; ch = *format++; break; default: break; } state = DP_S_CONV; break; case DP_S_CONV: if (cnk->num == 0) cnk->num = ++pnum; max_pos = add_cnk_list_entry(&clist, max_pos, cnk); if (max_pos == 0) /* out of memory :-( */ goto done; switch (ch) { case 'd': case 'i': cnk->type = CNK_INT; break; case 'o': cnk->type = CNK_OCTAL; cnk->flags |= DP_F_UNSIGNED; break; case 'u': cnk->type = CNK_UINT; cnk->flags |= DP_F_UNSIGNED; break; case 'X': cnk->flags |= DP_F_UP; case 'x': cnk->type = CNK_HEX; cnk->flags |= DP_F_UNSIGNED; break; case 'A': /* hex float not supported yet */ case 'E': case 'G': case 'F': cnk->flags |= DP_F_UP; case 'a': /* hex float not supported yet */ case 'e': case 'f': case 'g': cnk->type = CNK_FLOAT; break; case 'c': cnk->type = CNK_CHAR; break; case 's': cnk->type = CNK_STRING; break; case 'p': cnk->type = CNK_PTR; break; case 'n': cnk->type = CNK_NUM; break; case '%': cnk->type = CNK_PRCNT; break; default: /* Unknown, bail out*/ goto done; } ch = *format++; state = DP_S_DEFAULT; break; case DP_S_DONE: break; default: /* hmm? */ break; /* some picky compilers need this */ } } /* retieve the format arguments */ for (pnum = 0; pnum < max_pos; pnum++) { int i; if (clist[pnum].num == 0) { /* ignoring a parameter should not be permitted * all parameters must be matched at least once * BUT seem some system ignore this rule ... * at least my glibc based system does --SSS */ #ifdef DEBUG_SNPRINTF printf("parameter at position %d not used\n", pnum+1); #endif /* eat the parameter */ va_arg (args, int); continue; } for (i = 1; i < clist[pnum].num; i++) { if (clist[pnum].chunks[0]->type != clist[pnum].chunks[i]->type) { /* nooo noo no! * all the references to a parameter * must be of the same type */ goto done; } } cnk = clist[pnum].chunks[0]; switch (cnk->type) { case CNK_INT: if (cnk->cflags == DP_C_SHORT) cnk->value = va_arg (args, int); else if (cnk->cflags == DP_C_LONG) cnk->value = va_arg (args, long int); else if (cnk->cflags == DP_C_LLONG) cnk->value = va_arg (args, LLONG); else if (cnk->cflags == DP_C_SIZET) cnk->value = va_arg (args, ssize_t); else cnk->value = va_arg (args, int); for (i = 1; i < clist[pnum].num; i++) { clist[pnum].chunks[i]->value = cnk->value; } break; case CNK_OCTAL: case CNK_UINT: case CNK_HEX: if (cnk->cflags == DP_C_SHORT) cnk->value = va_arg (args, unsigned int); else if (cnk->cflags == DP_C_LONG) cnk->value = (unsigned long int)va_arg (args, unsigned long int); else if (cnk->cflags == DP_C_LLONG) cnk->value = (LLONG)va_arg (args, unsigned LLONG); else if (cnk->cflags == DP_C_SIZET) cnk->value = (size_t)va_arg (args, size_t); else cnk->value = (unsigned int)va_arg (args, unsigned int); for (i = 1; i < clist[pnum].num; i++) { clist[pnum].chunks[i]->value = cnk->value; } break; case CNK_FLOAT: if (cnk->cflags == DP_C_LDOUBLE) cnk->fvalue = va_arg (args, LDOUBLE); else cnk->fvalue = va_arg (args, double); for (i = 1; i < clist[pnum].num; i++) { clist[pnum].chunks[i]->fvalue = cnk->fvalue; } break; case CNK_CHAR: cnk->value = va_arg (args, int); for (i = 1; i < clist[pnum].num; i++) { clist[pnum].chunks[i]->value = cnk->value; } break; case CNK_STRING: cnk->strvalue = va_arg (args, char *); if (!cnk->strvalue) cnk->strvalue = "(NULL)"; for (i = 1; i < clist[pnum].num; i++) { clist[pnum].chunks[i]->strvalue = cnk->strvalue; } break; case CNK_PTR: cnk->strvalue = va_arg (args, void *); for (i = 1; i < clist[pnum].num; i++) { clist[pnum].chunks[i]->strvalue = cnk->strvalue; } break; case CNK_NUM: if (cnk->cflags == DP_C_CHAR) cnk->pnum = va_arg (args, char *); else if (cnk->cflags == DP_C_SHORT) cnk->pnum = va_arg (args, short int *); else if (cnk->cflags == DP_C_LONG) cnk->pnum = va_arg (args, long int *); else if (cnk->cflags == DP_C_LLONG) cnk->pnum = va_arg (args, LLONG *); else if (cnk->cflags == DP_C_SIZET) cnk->pnum = va_arg (args, ssize_t *); else cnk->pnum = va_arg (args, int *); for (i = 1; i < clist[pnum].num; i++) { clist[pnum].chunks[i]->pnum = cnk->pnum; } break; case CNK_PRCNT: break; default: /* what ?? */ goto done; } } /* print out the actual string from chunks */ currlen = 0; cnk = chunks; while (cnk) { int len, min, max; if (cnk->min_star) min = cnk->min_star->value; else min = cnk->min; if (cnk->max_star) max = cnk->max_star->value; else max = cnk->max; switch (cnk->type) { case CNK_FMT_STR: if (maxlen != 0 && maxlen > currlen) { if (maxlen > (currlen + cnk->len)) len = cnk->len; else len = maxlen - currlen; memcpy(&(buffer[currlen]), &(base[cnk->start]), len); } currlen += cnk->len; break; case CNK_INT: case CNK_UINT: fmtint (buffer, &currlen, maxlen, cnk->value, 10, min, max, cnk->flags); break; case CNK_OCTAL: fmtint (buffer, &currlen, maxlen, cnk->value, 8, min, max, cnk->flags); break; case CNK_HEX: fmtint (buffer, &currlen, maxlen, cnk->value, 16, min, max, cnk->flags); break; case CNK_FLOAT: fmtfp (buffer, &currlen, maxlen, cnk->fvalue, min, max, cnk->flags); break; case CNK_CHAR: dopr_outch (buffer, &currlen, maxlen, cnk->value); break; case CNK_STRING: if (max == -1) { max = strlen(cnk->strvalue); } fmtstr (buffer, &currlen, maxlen, cnk->strvalue, cnk->flags, min, max); break; case CNK_PTR: fmtint (buffer, &currlen, maxlen, (long)(cnk->strvalue), 16, min, max, cnk->flags); break; case CNK_NUM: if (cnk->cflags == DP_C_CHAR) *((char *)(cnk->pnum)) = (char)currlen; else if (cnk->cflags == DP_C_SHORT) *((short int *)(cnk->pnum)) = (short int)currlen; else if (cnk->cflags == DP_C_LONG) *((long int *)(cnk->pnum)) = (long int)currlen; else if (cnk->cflags == DP_C_LLONG) *((LLONG *)(cnk->pnum)) = (LLONG)currlen; else if (cnk->cflags == DP_C_SIZET) *((ssize_t *)(cnk->pnum)) = (ssize_t)currlen; else *((int *)(cnk->pnum)) = (int)currlen; break; case CNK_PRCNT: dopr_outch (buffer, &currlen, maxlen, '%'); break; default: /* what ?? */ goto done; } cnk = cnk->next; } if (maxlen != 0) { if (currlen < maxlen - 1) buffer[currlen] = '\0'; else if (maxlen > 0) buffer[maxlen - 1] = '\0'; } ret = currlen; done: va_end(args); while (chunks) { cnk = chunks->next; free(chunks); chunks = cnk; } if (clist) { for (pnum = 0; pnum < max_pos; pnum++) { if (clist[pnum].chunks) free(clist[pnum].chunks); } free(clist); } return ret; } 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; #ifdef DEBUG_SNPRINTF printf("fmtstr min=%d max=%d s=[%s]\n", min, max, value); #endif if (value == 0) { value = "<NULL>"; } for (strln = 0; strln < max && value[strln]; ++strln); /* strlen */ padlen = min - strln; if (padlen < 0) padlen = 0; if (flags & DP_F_MINUS) padlen = -padlen; /* Left Justify */ while (padlen > 0) { dopr_outch (buffer, currlen, maxlen, ' '); --padlen; } while (*value && (cnt < max)) { dopr_outch (buffer, currlen, maxlen, *value++); ++cnt; } while (padlen < 0) { dopr_outch (buffer, currlen, maxlen, ' '); ++padlen; } } /* Have to handle DP_F_NUM (ie 0x and 0 alternates) */ static void fmtint(char *buffer, size_t *currlen, size_t maxlen, LLONG value, int base, int min, int max, int flags) { int signvalue = 0; unsigned LLONG 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 printf("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 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; LLONG l=0; 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 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 */ 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]); #ifdef DEBUG_SNPRINTF printf("fmtfp: fplace=%d zpadlen=%d\n", fplace, zpadlen); #endif /* * 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)++; } static struct pr_chunk *new_chunk(void) { struct pr_chunk *new_c = (struct pr_chunk *)malloc(sizeof(struct pr_chunk)); if (!new_c) return NULL; new_c->type = 0; new_c->num = 0; new_c->min = 0; new_c->min_star = NULL; new_c->max = -1; new_c->max_star = NULL; new_c->flags = 0; new_c->cflags = 0; new_c->start = 0; new_c->len = 0; new_c->value = 0; new_c->fvalue = 0; new_c->strvalue = NULL; new_c->pnum = NULL; new_c->next = NULL; return new_c; } static int add_cnk_list_entry(struct pr_chunk_x **list, int max_num, struct pr_chunk *chunk) { struct pr_chunk_x *l; struct pr_chunk **c; int max; int cnum; int i, pos; if (chunk->num > max_num) { max = chunk->num; if (*list == NULL) { l = (struct pr_chunk_x *)malloc(sizeof(struct pr_chunk_x) * max); pos = 0; } else { l = (struct pr_chunk_x *)realloc(*list, sizeof(struct pr_chunk_x) * max); pos = max_num; } if (l == NULL) { for (i = 0; i < max; i++) { if ((*list)[i].chunks) free((*list)[i].chunks); } return 0; } for (i = pos; i < max; i++) { l[i].chunks = NULL; l[i].num = 0; } } else { l = *list; max = max_num; } i = chunk->num - 1; cnum = l[i].num + 1; if (l[i].chunks == NULL) { c = (struct pr_chunk **)malloc(sizeof(struct pr_chunk *) * cnum); } else { c = (struct pr_chunk **)realloc(l[i].chunks, sizeof(struct pr_chunk *) * cnum); } if (c == NULL) { for (i = 0; i < max; i++) { if (l[i].chunks) free(l[i].chunks); } return 0; } c[l[i].num] = chunk; l[i].chunks = c; l[i].num = cnum; *list = l; return max; } int vsnprintf (char *str, size_t count, const char *fmt, va_list args) { return dopr(str, count, fmt, args); } #endif /* yes this really must be a ||. Don't muck with this (tridge) * * The logic for these two is that we need our own definition if the * OS *either* has no definition of *sprintf, or if it does have one * that doesn't work properly according to the autoconf test. */ #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF) int snprintf(char *str,size_t count,const char *fmt,...) { size_t ret; va_list ap; va_start(ap, fmt); ret = vsnprintf(str, count, fmt, ap); va_end(ap); return ret; } #endif #ifndef HAVE_C99_VSNPRINTF int printf(const char *fmt, ...) { va_list ap; int ret; char *s; s = NULL; va_start(ap, fmt); ret = vasprintf(&s, fmt, ap); va_end(ap); if (s) { fwrite(s, 1, strlen(s), stdout); } free(s); return ret; } #endif #ifndef HAVE_C99_VSNPRINTF int fprintf(FILE *stream, const char *fmt, ...) { va_list ap; int ret; char *s; s = NULL; va_start(ap, fmt); ret = vasprintf(&s, fmt, ap); va_end(ap); if (s) { fwrite(s, 1, strlen(s), stream); } free(s); return ret; } #endif #endif #ifndef HAVE_VASPRINTF int vasprintf(char **ptr, const char *format, va_list ap) { int ret; va_list ap2; VA_COPY(ap2, ap); ret = vsnprintf(NULL, 0, format, ap2); va_end(ap2); if (ret <= 0) return ret; (*ptr) = (char *)malloc(ret+1); if (!*ptr) return -1; VA_COPY(ap2, ap); ret = vsnprintf(*ptr, ret+1, format, ap2); va_end(ap2); return ret; } #endif #ifndef HAVE_ASPRINTF int asprintf(char **ptr, const char *format, ...) { va_list ap; int ret; *ptr = NULL; va_start(ap, format); ret = vasprintf(ptr, format, ap); va_end(ap); return ret; } #endif #ifdef TEST_SNPRINTF int sprintf(char *str,const char *fmt,...); int printf(const char *fmt,...); int main (void) { char buf1[1024]; char buf2[1024]; char *buf3; char *fp_fmt[] = { "%1.1f", "%-1.5f", "%1.5f", "%123.9f", "%10.5f", "% 10.5f", "%+22.9f", "%+4.9f", "%01.3f", "%4f", "%3.1f", "%3.2f", "%.0f", "%f", "%-8.8f", "%-9.9f", NULL }; double fp_nums[] = { 6442452944.1234, -1.5, 134.21, 91340.2, 341.1234, 203.9, 0.96, 0.996, 0.9996, 1.996, 4.136, 5.030201, 0.00205, /* END LIST */ 0}; char *int_fmt[] = { "%-1.5d", "%1.5d", "%123.9d", "%5.5d", "%10.5d", "% 10.5d", "%+22.33d", "%01.3d", "%4d", "%d", NULL }; long int_nums[] = { -1, 134, 91340, 341, 0203, 1234567890, 0}; char *str_fmt[] = { "%10.5s", "%-10.5s", "%5.10s", "%-5.10s", "%10.1s", "%0.10s", "%10.0s", "%1.10s", "%s", "%.1s", "%.10s", "%10s", NULL }; char *str_vals[] = {"hello", "a", "", "a longer string", NULL}; #ifdef HAVE_LONG_LONG char *ll_fmt[] = { "%llu", NULL }; LLONG ll_nums[] = { 134, 91340, 341, 0203, 1234567890, 128006186140000000LL, 0}; #endif int x, y; int fail = 0; int num = 0; int l1, l2; char *ss_fmt[] = { "%zd", "%zu", NULL }; size_t ss_nums[] = {134, 91340, 123456789, 0203, 1234567890, 0}; printf ("Testing snprintf format codes against system sprintf...\n"); for (x = 0; fp_fmt[x] ; x++) { for (y = 0; fp_nums[y] != 0 ; y++) { buf1[0] = buf2[0] = '\0'; l1 = snprintf(buf1, sizeof(buf1), fp_fmt[x], fp_nums[y]); l2 = sprintf (buf2, fp_fmt[x], fp_nums[y]); buf1[1023] = buf2[1023] = '\0'; if (strcmp (buf1, buf2) || (l1 != l2)) { printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", fp_fmt[x], l1, buf1, l2, buf2); fail++; } num++; } } for (x = 0; int_fmt[x] ; x++) { for (y = 0; int_nums[y] != 0 ; y++) { buf1[0] = buf2[0] = '\0'; l1 = snprintf(buf1, sizeof(buf1), int_fmt[x], int_nums[y]); l2 = sprintf (buf2, int_fmt[x], int_nums[y]); buf1[1023] = buf2[1023] = '\0'; if (strcmp (buf1, buf2) || (l1 != l2)) { printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", int_fmt[x], l1, buf1, l2, buf2); fail++; } num++; } } for (x = 0; str_fmt[x] ; x++) { for (y = 0; str_vals[y] != 0 ; y++) { buf1[0] = buf2[0] = '\0'; l1 = snprintf(buf1, sizeof(buf1), str_fmt[x], str_vals[y]); l2 = sprintf (buf2, str_fmt[x], str_vals[y]); buf1[1023] = buf2[1023] = '\0'; if (strcmp (buf1, buf2) || (l1 != l2)) { printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", str_fmt[x], l1, buf1, l2, buf2); fail++; } num++; } } #ifdef HAVE_LONG_LONG for (x = 0; ll_fmt[x] ; x++) { for (y = 0; ll_nums[y] != 0 ; y++) { buf1[0] = buf2[0] = '\0'; l1 = snprintf(buf1, sizeof(buf1), ll_fmt[x], ll_nums[y]); l2 = sprintf (buf2, ll_fmt[x], ll_nums[y]); buf1[1023] = buf2[1023] = '\0'; if (strcmp (buf1, buf2) || (l1 != l2)) { printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", ll_fmt[x], l1, buf1, l2, buf2); fail++; } num++; } } #endif #define BUFSZ 2048 buf1[0] = buf2[0] = '\0'; if ((buf3 = malloc(BUFSZ)) == NULL) { fail++; } else { num++; memset(buf3, 'a', BUFSZ); snprintf(buf1, sizeof(buf1), "%.*s", 1, buf3); buf1[1023] = '\0'; if (strcmp(buf1, "a") != 0) { printf("length limit buf1 '%s' expected 'a'\n", buf1); fail++; } } buf1[0] = buf2[0] = '\0'; l1 = snprintf(buf1, sizeof(buf1), "%4$*1$d %2$s %3$*1$.*1$f", 3, "pos test", 12.3456, 9); l2 = sprintf(buf2, "%4$*1$d %2$s %3$*1$.*1$f", 3, "pos test", 12.3456, 9); buf1[1023] = buf2[1023] = '\0'; if (strcmp(buf1, buf2) || (l1 != l2)) { printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", "%4$*1$d %2$s %3$*1$.*1$f", l1, buf1, l2, buf2); fail++; } buf1[0] = buf2[0] = '\0'; l1 = snprintf(buf1, sizeof(buf1), "%4$*4$d %2$s %3$*4$.*4$f", 3, "pos test", 12.3456, 9); l2 = sprintf(buf2, "%4$*4$d %2$s %3$*4$.*4$f", 3, "pos test", 12.3456, 9); buf1[1023] = buf2[1023] = '\0'; if (strcmp(buf1, buf2)) { printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", "%4$*1$d %2$s %3$*1$.*1$f", l1, buf1, l2, buf2); fail++; } for (x = 0; ss_fmt[x] ; x++) { for (y = 0; ss_nums[y] != 0 ; y++) { buf1[0] = buf2[0] = '\0'; l1 = snprintf(buf1, sizeof(buf1), ss_fmt[x], ss_nums[y]); l2 = sprintf (buf2, ss_fmt[x], ss_nums[y]); buf1[1023] = buf2[1023] = '\0'; if (strcmp (buf1, buf2) || (l1 != l2)) { printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", ss_fmt[x], l1, buf1, l2, buf2); fail++; } num++; } } #if 0 buf1[0] = buf2[0] = '\0'; l1 = snprintf(buf1, sizeof(buf1), "%lld", (LLONG)1234567890); l2 = sprintf(buf2, "%lld", (LLONG)1234567890); buf1[1023] = buf2[1023] = '\0'; if (strcmp(buf1, buf2)) { printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", "%lld", l1, buf1, l2, buf2); fail++; } buf1[0] = buf2[0] = '\0'; l1 = snprintf(buf1, sizeof(buf1), "%Lf", (LDOUBLE)890.1234567890123); l2 = sprintf(buf2, "%Lf", (LDOUBLE)890.1234567890123); buf1[1023] = buf2[1023] = '\0'; if (strcmp(buf1, buf2)) { printf("snprintf doesn't match Format: %s\n\tsnprintf(%d) = [%s]\n\t sprintf(%d) = [%s]\n", "%Lf", l1, buf1, l2, buf2); fail++; } #endif printf ("%d tests failed out of %d.\n", fail, num); printf("seeing how many digits we support\n"); { double v0 = 0.12345678901234567890123456789012345678901; for (x=0; x<100; x++) { double p = pow(10, x); double r = v0*p; snprintf(buf1, sizeof(buf1), "%1.1f", r); sprintf(buf2, "%1.1f", r); if (strcmp(buf1, buf2)) { printf("we seem to support %d digits\n", x-1); break; } } } return 0; } #endif /* TEST_SNPRINTF */