/* ** OSSP act - Abstract Container Types ** Copyright (c) 1999-2003 Ralf S. Engelschall ** Copyright (c) 1999-2003 The OSSP Project ** ** This file is part of OSSP act, an abstract container type library ** which can be found at http://www.ossp.org/pkg/lib/act/. ** ** Permission to use, copy, modify, and distribute this software for ** any purpose with or without fee is hereby granted, provided that ** the above copyright notice and this permission notice appear in all ** copies. ** ** THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED ** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF ** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ** IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR ** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF ** USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, ** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT ** OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF ** SUCH DAMAGE. ** ** act_str.c: string formatting (implementation) */ /* * Copyright Patrick Powell 1995 * This code is based on code written by Patrick Powell * It may be used for any purpose as long as this notice remains intact * on all source code distributions. */ /* * This code contains numerious changes and enhancements which were * made by lots of contributors over the last years to Patrick Powell's * original code: * * o Patrick Powell (1995) * o Brandon Long (1996, for Mutt) * o Thomas Roessler (1998, for Mutt) * o Michael Elkins (1998, for Mutt) * o Andrew Tridgell (1998, for Samba) * o Luke Mewburn (1999, for LukemFTP) * o Ralf S. Engelschall (1999, for OSSP) */ #include /* for size_t */ #include /* for malloc(3) */ #include /* for va_list */ #include /* for isdigit(3) */ #include /* for integer max */ #include "act_p.h" #if HAVE_LONGLONG #define LLONG long long #else #define LLONG long #endif #if HAVE_LONGDOUBLE #define LDOUBLE long double #else #define LDOUBLE double #endif static void fmtstr (char *, size_t *, size_t, char *, int, int, int); static void fmtint (char *, size_t *, size_t, LLONG, int, int, int, int); static void fmtfp (char *, size_t *, size_t, LDOUBLE, int, int, int); static void dopr_outch (char *, size_t *, size_t, int); /* 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 DP_C_LLONG 4 /* some handy macros */ #define char_to_int(p) (p - '0') #define MAX(p,q) ((p >= q) ? p : q) #define NUL '\0' static void dopr( char *buffer, size_t maxlen, size_t *retlen, const char *format, va_list args) { char ch; LLONG value; LDOUBLE fvalue; char *strvalue; int min; int max; int state; int flags; int cflags; size_t currlen; state = DP_S_DEFAULT; flags = currlen = cflags = min = 0; max = -1; ch = *format++; if (maxlen == -1) /* possible maximum size in a size_t */ maxlen = (~(1<<((sizeof(size_t)*8)-2))); while (state != DP_S_DONE) { if ((ch == NUL) || (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: switch (ch) { case 'h': cflags = DP_C_SHORT; ch = *format++; break; case 'l': if (*format == 'l') { cflags = DP_C_LLONG; format++; } else cflags = DP_C_LONG; ch = *format++; break; case 'q': 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': switch (cflags) { case DP_C_SHORT: value = (short int)va_arg(args, int); break; case DP_C_LONG: value = va_arg(args, long int); break; case DP_C_LLONG: value = va_arg(args, LLONG); break; default: value = va_arg(args, int); break; } fmtint(buffer, &currlen, maxlen, value, 10, min, max, flags); break; case 'X': flags |= DP_F_UP; /* FALLTHROUGH */ case 'x': case 'o': case 'u': flags |= DP_F_UNSIGNED; switch (cflags) { case DP_C_SHORT: value = (unsigned short int)va_arg(args, unsigned int); break; case DP_C_LONG: value = (LLONG)va_arg(args, unsigned long int); break; case DP_C_LLONG: value = va_arg(args, unsigned LLONG); break; default: value = (LLONG)va_arg(args, unsigned int); break; } fmtint(buffer, &currlen, maxlen, value, ch == 'o' ? 8 : (ch == 'u' ? 10 : 16), min, max, flags); break; case 'f': 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 'E': flags |= DP_F_UP; case 'e': if (cflags == DP_C_LDOUBLE) fvalue = va_arg(args, LDOUBLE); else fvalue = va_arg(args, double); 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); 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; fmtstr(buffer, &currlen, maxlen, strvalue, flags, min, max); break; case 'p': value = (long)va_arg(args, void *); fmtint(buffer, &currlen, maxlen, value, 16, min, max, flags); break; case 'n': /* XXX */ if (cflags == DP_C_SHORT) { short int *num; num = va_arg(args, short int *); *num = currlen; } else if (cflags == DP_C_LONG) { /* XXX */ long int *num; num = va_arg(args, long int *); *num = (long int) currlen; } else if (cflags == DP_C_LLONG) { /* XXX */ 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; default: /* unknown, skip */ break; } ch = *format++; state = DP_S_DEFAULT; flags = cflags = min = 0; max = -1; break; case DP_S_DONE: break; default: break; } } if (currlen >= maxlen - 1) currlen = maxlen - 1; if (buffer != NULL) buffer[currlen] = NUL; *retlen = currlen; return; } static void fmtstr( char *buffer, size_t *currlen, size_t maxlen, char *value, int flags, int min, int max) { int padlen, strln; int cnt = 0; if (value == 0) value = ""; for (strln = 0; value[strln] != '\0'; strln++) ; padlen = min - strln; if (padlen < 0) padlen = 0; if (flags & DP_F_MINUS) padlen = -padlen; 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; } } 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; int zpadlen = 0; 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) signvalue = '+'; else if (flags & DP_F_SPACE) signvalue = ' '; } if (flags & DP_F_UP) caps = 1; 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; /* 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; } return; } 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 long round(LDOUBLE value) { long intpart; intpart = (long) value; value = value - intpart; if (value >= 0.5) intpart++; return intpart; } static void fmtfp( char *buffer, size_t *currlen, size_t maxlen, LDOUBLE fvalue, int min, int max, int flags) { int signvalue = 0; LDOUBLE ufvalue; char iconvert[20]; char fconvert[20]; int iplace = 0; int fplace = 0; int padlen = 0; int zpadlen = 0; int caps = 0; long intpart; long fracpart; if (max < 0) max = 6; ufvalue = abs_val(fvalue); if (fvalue < 0) signvalue = '-'; else if (flags & DP_F_PLUS) signvalue = '+'; else if (flags & DP_F_SPACE) signvalue = ' '; intpart = (long)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); } /* 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; 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 (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; } return; } static void dopr_outch( char *buffer, size_t *currlen, size_t maxlen, int c) { if (*currlen < maxlen) { if (buffer != NULL) buffer[(*currlen)] = (char)c; (*currlen)++; } return; } intern int act_vsnprintf( char *str, size_t count, const char *fmt, va_list args) { size_t retlen; if (str != NULL) str[0] = NUL; dopr(str, count, &retlen, fmt, args); return retlen; } intern int act_snprintf( char *str, size_t count, const char *fmt, ...) { va_list ap; int rv; va_start(ap, fmt); rv = act_vsnprintf(str, count, fmt, ap); va_end(ap); return rv; } intern char * act_vasprintf( const char *fmt, va_list ap) { char *rv; int n; n = act_vsnprintf(NULL, -1, fmt, ap); if ((rv = (char *)malloc(n+1)) == NULL) return NULL; act_vsnprintf(rv, n+1, fmt, ap); return rv; } intern char * act_asprintf( const char *fmt, ...) { va_list ap; char *rv; va_start(ap, fmt); rv = act_vasprintf(fmt, ap); va_end(ap); return rv; }