1*4887Schin /*********************************************************************** 2*4887Schin * * 3*4887Schin * This software is part of the ast package * 4*4887Schin * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5*4887Schin * and is licensed under the * 6*4887Schin * Common Public License, Version 1.0 * 7*4887Schin * by AT&T Knowledge Ventures * 8*4887Schin * * 9*4887Schin * A copy of the License is available at * 10*4887Schin * http://www.opensource.org/licenses/cpl1.0.txt * 11*4887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12*4887Schin * * 13*4887Schin * Information and Software Systems Research * 14*4887Schin * AT&T Research * 15*4887Schin * Florham Park NJ * 16*4887Schin * * 17*4887Schin * Glenn Fowler <gsf@research.att.com> * 18*4887Schin * David Korn <dgk@research.att.com> * 19*4887Schin * Phong Vo <kpv@research.att.com> * 20*4887Schin * * 21*4887Schin ***********************************************************************/ 22*4887Schin #pragma prototyped 23*4887Schin 24*4887Schin /* 25*4887Schin * Glenn Fowler 26*4887Schin * AT&T Research 27*4887Schin * 28*4887Schin * return printf(3) format signature given format string 29*4887Schin * the format signature contains one char per format optionally preceded 30*4887Schin * by the number of `*' args 31*4887Schin * c char 32*4887Schin * d double 33*4887Schin * D long double 34*4887Schin * f float 35*4887Schin * h short 36*4887Schin * i int 37*4887Schin * j long long 38*4887Schin * l long 39*4887Schin * p void* 40*4887Schin * s string 41*4887Schin * t ptrdiff_t 42*4887Schin * z size_t 43*4887Schin * ? unknown 44*4887Schin */ 45*4887Schin 46*4887Schin #include <ast.h> 47*4887Schin #include <ctype.h> 48*4887Schin 49*4887Schin char* 50*4887Schin fmtfmt(const char* as) 51*4887Schin { 52*4887Schin register char* s = (char*)as; 53*4887Schin char* buf; 54*4887Schin int i; 55*4887Schin int c; 56*4887Schin int a; 57*4887Schin int q; 58*4887Schin int x; 59*4887Schin int t; 60*4887Schin int m; 61*4887Schin int n; 62*4887Schin int z; 63*4887Schin char formats[256]; 64*4887Schin unsigned int extra[elementsof(formats)]; 65*4887Schin 66*4887Schin z = 1; 67*4887Schin i = m = 0; 68*4887Schin for (;;) 69*4887Schin { 70*4887Schin switch (*s++) 71*4887Schin { 72*4887Schin case 0: 73*4887Schin break; 74*4887Schin case '%': 75*4887Schin if (*s == '%') 76*4887Schin continue; 77*4887Schin n = 0; 78*4887Schin a = 0; 79*4887Schin q = 0; 80*4887Schin t = '?'; 81*4887Schin x = 0; 82*4887Schin for (;;) 83*4887Schin { 84*4887Schin switch (c = *s++) 85*4887Schin { 86*4887Schin case 0: 87*4887Schin s--; 88*4887Schin break; 89*4887Schin case '(': 90*4887Schin q++; 91*4887Schin continue; 92*4887Schin case ')': 93*4887Schin if (--q <= 0) 94*4887Schin n = 0; 95*4887Schin continue; 96*4887Schin case '0': case '1': case '2': case '3': 97*4887Schin case '4': case '5': case '6': case '7': 98*4887Schin case '8': case '9': 99*4887Schin n = n * 10 + (c - '0'); 100*4887Schin continue; 101*4887Schin case '$': 102*4887Schin a = n; 103*4887Schin n = 0; 104*4887Schin continue; 105*4887Schin case '*': 106*4887Schin x++; 107*4887Schin n = 0; 108*4887Schin continue; 109*4887Schin case 'h': 110*4887Schin if (!q) 111*4887Schin t = t == 'h' ? 'c' : 'h'; 112*4887Schin continue; 113*4887Schin case 'l': 114*4887Schin if (!q) 115*4887Schin t = t == 'l' ? 'j' : 'l'; 116*4887Schin continue; 117*4887Schin case 'j': 118*4887Schin case 't': 119*4887Schin case 'z': 120*4887Schin if (!q) 121*4887Schin t = c; 122*4887Schin continue; 123*4887Schin case 'c': 124*4887Schin case 'p': 125*4887Schin case 's': 126*4887Schin if (!q) 127*4887Schin { 128*4887Schin t = c; 129*4887Schin break; 130*4887Schin } 131*4887Schin continue; 132*4887Schin case 'e': 133*4887Schin case 'g': 134*4887Schin if (!q) 135*4887Schin { 136*4887Schin switch (t) 137*4887Schin { 138*4887Schin case 'j': 139*4887Schin t = 'D'; 140*4887Schin break; 141*4887Schin default: 142*4887Schin t = 'd'; 143*4887Schin break; 144*4887Schin } 145*4887Schin break; 146*4887Schin } 147*4887Schin continue; 148*4887Schin case 'f': 149*4887Schin if (!q) 150*4887Schin { 151*4887Schin switch (t) 152*4887Schin { 153*4887Schin case 'j': 154*4887Schin t = 'D'; 155*4887Schin break; 156*4887Schin case 'l': 157*4887Schin t = 'd'; 158*4887Schin break; 159*4887Schin default: 160*4887Schin t = c; 161*4887Schin break; 162*4887Schin } 163*4887Schin break; 164*4887Schin } 165*4887Schin continue; 166*4887Schin default: 167*4887Schin if (!q && isalpha(c)) 168*4887Schin { 169*4887Schin if (t == '?') 170*4887Schin t = 'i'; 171*4887Schin break; 172*4887Schin } 173*4887Schin n = 0; 174*4887Schin continue; 175*4887Schin } 176*4887Schin break; 177*4887Schin } 178*4887Schin if (a) 179*4887Schin i = a; 180*4887Schin else 181*4887Schin i++; 182*4887Schin if (i < elementsof(formats)) 183*4887Schin { 184*4887Schin formats[i] = t; 185*4887Schin if (extra[i] = x) 186*4887Schin do z++; while (x /= 10); 187*4887Schin if (m < i) 188*4887Schin m = i; 189*4887Schin } 190*4887Schin continue; 191*4887Schin default: 192*4887Schin continue; 193*4887Schin } 194*4887Schin break; 195*4887Schin } 196*4887Schin s = buf = fmtbuf(m + z); 197*4887Schin for (i = 1; i <= m; i++) 198*4887Schin { 199*4887Schin if (extra[i]) 200*4887Schin s += sfsprintf(s, 10, "%d", extra[m]); 201*4887Schin *s++ = formats[i]; 202*4887Schin } 203*4887Schin *s = 0; 204*4887Schin return buf; 205*4887Schin } 206