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1.1 ! root 1: printf format string decision tree ! 2: ------ ------ ------ -------- ---- ! 3: ! 4: d,i flags: ! 5: - left justified in field ! 6: default is right justified ! 7: + always show sign ! 8: default is only show sign for negative ! 9: ' ' if non-negative or no characters, prefix with space ! 10: ignore if with + ! 11: # UNDEFINED ! 12: 0 pad to field width with zeros after any sign ! 13: ignore if with '-' flag ! 14: ignore if with precision ! 15: width: ! 16: if conv value has < width chars, pad field according to flag ! 17: * means read next input int, negative means '-' flag ! 18: precision: ! 19: minimum number of digits ! 20: if prec > digits, pad with 0 ! 21: default is 1 ! 22: . without digit means ".0" ! 23: .* reads next input int, negative number means ignore ! 24: 0 value with 0 precision writes no characters ! 25: conversion: ! 26: signed decimal number ! 27: pad to precision with leading 0s ! 28: following conversion spec: ! 29: h value is short ! 30: l value is long ! 31: L UNDEFINED ! 32: ! 33: o flags: ! 34: - left justified in field ! 35: default is right justified ! 36: + UNDEFINED ! 37: ' ' UNDEFINED ! 38: # increase precision to make first digit be 0 ! 39: 0 pad to field width with zeros ! 40: ignore if with '-' flag ! 41: ignore if with precision ! 42: width: ! 43: if conv value has < width chars, pad field according to flag ! 44: * means read next input int, negative means '-' flag ! 45: precision: ! 46: minimum number of digits ! 47: default is 1 ! 48: . without digit means ".0" ! 49: .* reads next input int, negative number means ignore ! 50: 0 value with 0 precision writes no characters ! 51: conversion: ! 52: unsigned octal ! 53: pad to precision with leading 0s ! 54: following conversion spec: ! 55: h value is unsigned short ! 56: l value is unsigned long ! 57: L UNDEFINED ! 58: ! 59: u flags: ! 60: - left justified in field ! 61: default is right justified ! 62: + UNDEFINED ! 63: ' ' UNDEFINED ! 64: # UNDEFINED ! 65: 0 pad to field width with zeros ! 66: ignore if with '-' flag ! 67: ignore if with precision ! 68: width: ! 69: if conv value has < width chars, pad field according to flag ! 70: * means read next input int, negative means '-' flag ! 71: precision: ! 72: minimum number of digits ! 73: default is 1 ! 74: . without digit means ".0" ! 75: .* reads next input int, negative number means ignore ! 76: 0 value with 0 precision writes no characters ! 77: conversion: ! 78: unsigned decimal ! 79: pad to precision with leading 0s ! 80: following conversion spec: ! 81: h value is unsigned short ! 82: l value is unsigned long ! 83: L UNDEFINED ! 84: ! 85: x,X flags: ! 86: - left justified in field ! 87: default is right justified ! 88: + UNDEFINED ! 89: ' ' UNDEFINED ! 90: # non-zero result has 0x or 0X prefix ! 91: 0 pad to field width with zeros ! 92: ignore if with '-' flag ! 93: ignore if with precision ! 94: width: ! 95: if conv value has < width chars, pad field according to flag ! 96: * means read next input int, negative means '-' flag ! 97: precision: ! 98: minimum number of digits ! 99: default is 1 ! 100: . without digit means ".0" ! 101: .* reads next input int, negative number means ignore ! 102: 0 value with 0 precision prints no characters ! 103: conversion: ! 104: unsigned hex ! 105: x uses lowercase, X uses upper case ! 106: pad to precision with leading 0s ! 107: following conversion spec: ! 108: h value is unsigned short ! 109: l value is unsigned long ! 110: L UNDEFINED ! 111: ! 112: f flags: ! 113: - left justified in field ! 114: default is right justified ! 115: + always show sign ! 116: default is only show sign if negative ! 117: ' ' if non-negative or no characters, prefix with space ! 118: ignore if with + ! 119: # always print a decimal point ! 120: default is to print decimal only if digits follow ! 121: 0 pad to field width with zeros after sign ! 122: ignore if with '-' flag ! 123: UNDEFINED if with precision ! 124: width: ! 125: if conv value has < width chars, pad field according to flag ! 126: * means read next input int, negative means '-' flag ! 127: precision: ! 128: maximum number of digits after the decimal point ! 129: default is 6 ! 130: . without digit means ".0" ! 131: .* reads next input int, negative number means ignore ! 132: conversion: ! 133: double of form ddd.ddd ! 134: if precision is 0 and no '#' flag, supress decimal point ! 135: if decimal point is printed, at least one character precedes ! 136: value is rounded to appropriate number of digits ! 137: following conversion spec: ! 138: h UNDEFINED ! 139: l UNDEFINED ! 140: L value is long double ! 141: ! 142: e,E flags: ! 143: - left justified in field ! 144: default is right justified ! 145: + always show sign ! 146: default is only show sign on negative ! 147: ' ' if non-negative or no characters, prefix with space ! 148: ignore if with + ! 149: # always print a decimal point ! 150: default is to print decimal only if digits follow ! 151: 0 pad to field width with zeros after sign ! 152: ignore if with '-' flag ! 153: UNDEFINED if with precision ! 154: width: ! 155: if conv value has < width chars, pad field according to flag ! 156: * means read next input int, negative means '-' flag ! 157: precision: ! 158: maximum number of digits after the decimal point ! 159: default is 6 ! 160: . without digit means ".0" ! 161: .* reads next input int, negative number means ignore ! 162: conversion: ! 163: d.dddde+/-ddd ! 164: one non-zero digit before decimal (if value is not 0) ! 165: 0 precision and no '#' flag suppresses decimal ! 166: value rounded to appropriate number of digits ! 167: E gives 'E' as exponent indicator, e gives 'e' ! 168: exponent is at least 2 digits ! 169: zero value guves 0 exponent ! 170: following conversion spec: ! 171: h UNDEFINED ! 172: l UNDEFINED ! 173: L value is long double ! 174: ! 175: g,G flags: ! 176: - left justified in field ! 177: default is right justified ! 178: + always show sign ! 179: default is only show sign on negative ! 180: ' ' if non-negative or no characters, prefix with space ! 181: ignore if with + ! 182: # always print a decimal point, do not remove trailing zeros ! 183: default is to print decimal only if digits follow ! 184: default is to strip trailing 0s after decimal point ! 185: 0 pad to field width with zeros after sign ! 186: ignore if with '-' flag ! 187: UNDEFINED if with precision ! 188: width: ! 189: if conv value has < width chars, pad field according to flag ! 190: * means read next input int, negative means '-' flag ! 191: precision: ! 192: maximum number of significant digits ! 193: . without digit means ".0" ! 194: .* reads next input int, negative number means ignore ! 195: missing or zero precision means 1 ! 196: conversion: ! 197: if exponent < -4 or >= precision use e(E) format ! 198: otherwise use f format ! 199: trailing 0's removed if no '#' flag ! 200: decimal point suppressed if no character and no '#' flag ! 201: following conversion spec: ! 202: h UNDEFINED ! 203: l UNDEFINED ! 204: L value is long double ! 205: ! 206: c flags: ! 207: - left justified in field ! 208: default is right justified ! 209: + UNDEFINED ! 210: ' ' UNDEFINED ! 211: # UNDEFINED ! 212: 0 UNDEFINED ! 213: width: ! 214: if conv value has < width chars, pad field according to flag ! 215: * means read next input int, negative means '-' flag ! 216: precision ! 217: UNDEFINED ! 218: conversion ! 219: write the character ! 220: following conversion spec: ! 221: h UNDEFINED ! 222: l UNDEFINED ! 223: L UNDEFINED ! 224: ! 225: s flags: ! 226: - left justified in field ! 227: default is right justified ! 228: + UNDEFINED ! 229: ' ' UNDEFINED ! 230: # UNDEFINED ! 231: 0 UNDEFINED ! 232: width: ! 233: if conv value has < width chars, pad field with spaces left/right ! 234: * means read next input int, negative means '-' flag ! 235: precision: ! 236: maximum number of characters written ! 237: . without digit means ".0" ! 238: .* reads next input int, negative number means ignore ! 239: conversion: ! 240: write to end of string or (if specified) precision number of chars ! 241: if no precision or precision > size of string, must be NUL term. ! 242: following conversion spec: ! 243: h UNDEFINED ! 244: l UNDEFINED ! 245: L UNDEFINED ! 246: ! 247: p flags: ! 248: - left justified in field ! 249: default is right justified ! 250: + UNDEFINED ! 251: ' ' UNDEFINED ! 252: # UNDEFINED ! 253: 0 UNDEFINED ! 254: width: ! 255: if conv value has < width chars, pad field according to flag ! 256: * means read next input int, negative means '-' flag ! 257: precision: ! 258: UNDEFINED ! 259: conversion: ! 260: implementation defined pointer ! 261: following conversion spec: ! 262: h UNDEFINED ! 263: l UNDEFINED ! 264: L UNDEFINED ! 265: ! 266: n flags: ! 267: all flags are undefined ! 268: width: ! 269: UNDEFINED ! 270: precision: ! 271: UNDEFINED ! 272: conversion: ! 273: write number of characters written so far ! 274: following conversion specifier: ! 275: h pointer is to a short int ! 276: l pointer is to a long int ! 277: L UNDEFINED ! 278: ! 279: ! 280: misc: ! 281: %% is escapefor printing percent character ! 282: all other conversion specifiers have UNDEFINED behaviour ! 283: nonexistant or small field gets expanded to hold value ! 284: returns number of characters written, or negative number on output error ! 285:
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