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25
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1 /* ==================================================================== |
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2 * Copyright (c) 1995-1998 The Apache Group. All rights reserved. |
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3 * |
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4 * Redistribution and use in source and binary forms, with or without |
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5 * modification, are permitted provided that the following conditions |
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6 * are met: |
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7 * |
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8 * 1. Redistributions of source code must retain the above copyright |
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9 * notice, this list of conditions and the following disclaimer. |
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10 * |
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11 * 2. Redistributions in binary form must reproduce the above copyright |
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12 * notice, this list of conditions and the following disclaimer in |
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13 * the documentation and/or other materials provided with the |
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14 * distribution. |
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15 * |
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16 * 3. All advertising materials mentioning features or use of this |
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17 * software must display the following acknowledgment: |
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18 * "This product includes software developed by the Apache Group |
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19 * for use in the Apache HTTP server project (http://www.apache.org/)." |
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20 * |
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21 * 4. The names "Apache Server" and "Apache Group" must not be used to |
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22 * endorse or promote products derived from this software without |
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23 * prior written permission. |
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24 * |
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25 * 5. Redistributions of any form whatsoever must retain the following |
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26 * acknowledgment: |
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27 * "This product includes software developed by the Apache Group |
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28 * for use in the Apache HTTP server project (http://www.apache.org/)." |
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29 * |
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30 * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY |
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31 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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33 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR |
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34 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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41 * OF THE POSSIBILITY OF SUCH DAMAGE. |
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42 * ==================================================================== |
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43 * |
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44 * This software consists of voluntary contributions made by many |
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45 * individuals on behalf of the Apache Group and was originally based |
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46 * on public domain software written at the National Center for |
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47 * Supercomputing Applications, University of Illinois, Urbana-Champaign. |
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48 * For more information on the Apache Group and the Apache HTTP server |
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49 * project, please see <http://www.apache.org/>. |
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50 * |
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51 * This code is based on, and used with the permission of, the |
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52 * SIO stdio-replacement strx_* functions by Panos Tsirigotis |
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53 * <panos@alumni.cs.colorado.edu> for xinetd. |
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54 */ |
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55 |
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56 #include <libxode.h> |
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57 |
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58 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF) |
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59 |
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60 #include <stdio.h> |
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61 #include <ctype.h> |
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62 #include <sys/types.h> |
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63 #include <stdarg.h> |
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64 #include <string.h> |
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65 #include <stdlib.h> |
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66 #include <math.h> |
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67 |
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68 |
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69 #ifdef HAVE_GCVT |
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70 |
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71 #define ap_ecvt ecvt |
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72 #define ap_fcvt fcvt |
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73 #define ap_gcvt gcvt |
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74 |
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75 #else |
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76 |
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77 /* |
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78 * cvt.c - IEEE floating point formatting routines for FreeBSD |
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79 * from GNU libc-4.6.27 |
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80 */ |
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81 |
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82 /* |
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83 * ap_ecvt converts to decimal |
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84 * the number of digits is specified by ndigit |
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85 * decpt is set to the position of the decimal point |
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86 * sign is set to 0 for positive, 1 for negative |
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87 */ |
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88 |
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89 #define NDIG 80 |
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90 |
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91 static char * |
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92 ap_cvt(double arg, int ndigits, int *decpt, int *sign, int eflag) |
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93 { |
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94 register int r2; |
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95 double fi, fj; |
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96 register char *p, *p1; |
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97 static char buf[NDIG]; |
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98 |
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99 if (ndigits >= NDIG - 1) |
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100 ndigits = NDIG - 2; |
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101 r2 = 0; |
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102 *sign = 0; |
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103 p = &buf[0]; |
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104 if (arg < 0) { |
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105 *sign = 1; |
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106 arg = -arg; |
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107 } |
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108 arg = modf(arg, &fi); |
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109 p1 = &buf[NDIG]; |
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110 /* |
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111 * Do integer part |
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112 */ |
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113 if (fi != 0) { |
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114 p1 = &buf[NDIG]; |
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115 while (fi != 0) { |
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116 fj = modf(fi / 10, &fi); |
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117 *--p1 = (int) ((fj + .03) * 10) + '0'; |
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118 r2++; |
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119 } |
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120 while (p1 < &buf[NDIG]) |
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121 *p++ = *p1++; |
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122 } else if (arg > 0) { |
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123 while ((fj = arg * 10) < 1) { |
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124 arg = fj; |
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125 r2--; |
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126 } |
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127 } |
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128 p1 = &buf[ndigits]; |
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129 if (eflag == 0) |
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130 p1 += r2; |
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131 *decpt = r2; |
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132 if (p1 < &buf[0]) { |
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133 buf[0] = '\0'; |
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134 return (buf); |
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135 } |
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136 while (p <= p1 && p < &buf[NDIG]) { |
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137 arg *= 10; |
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138 arg = modf(arg, &fj); |
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139 *p++ = (int) fj + '0'; |
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140 } |
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141 if (p1 >= &buf[NDIG]) { |
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142 buf[NDIG - 1] = '\0'; |
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143 return (buf); |
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144 } |
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145 p = p1; |
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146 *p1 += 5; |
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147 while (*p1 > '9') { |
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148 *p1 = '0'; |
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149 if (p1 > buf) |
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150 ++ * --p1; |
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151 else { |
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152 *p1 = '1'; |
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153 (*decpt)++; |
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154 if (eflag == 0) { |
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155 if (p > buf) |
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156 *p = '0'; |
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157 p++; |
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158 } |
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159 } |
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160 } |
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161 *p = '\0'; |
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162 return (buf); |
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163 } |
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164 |
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165 static char * |
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166 ap_ecvt(double arg, int ndigits, int *decpt, int *sign) |
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167 { |
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168 return (ap_cvt(arg, ndigits, decpt, sign, 1)); |
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169 } |
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170 |
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171 static char * |
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172 ap_fcvt(double arg, int ndigits, int *decpt, int *sign) |
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173 { |
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174 return (ap_cvt(arg, ndigits, decpt, sign, 0)); |
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175 } |
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176 |
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177 /* |
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178 * ap_gcvt - Floating output conversion to |
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179 * minimal length string |
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180 */ |
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181 |
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182 static char * |
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183 ap_gcvt(double number, int ndigit, char *buf) |
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184 { |
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185 int sign, decpt; |
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186 register char *p1, *p2; |
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187 int i; |
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188 |
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189 p1 = ap_ecvt(number, ndigit, &decpt, &sign); |
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190 p2 = buf; |
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191 if (sign) |
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192 *p2++ = '-'; |
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193 for (i = ndigit - 1; i > 0 && p1[i] == '0'; i--) |
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194 ndigit--; |
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195 if ((decpt >= 0 && decpt - ndigit > 4) |
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196 || (decpt < 0 && decpt < -3)) { /* use E-style */ |
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197 decpt--; |
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198 *p2++ = *p1++; |
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199 *p2++ = '.'; |
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200 for (i = 1; i < ndigit; i++) |
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201 *p2++ = *p1++; |
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202 *p2++ = 'e'; |
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203 if (decpt < 0) { |
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204 decpt = -decpt; |
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205 *p2++ = '-'; |
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206 } else |
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207 *p2++ = '+'; |
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208 if (decpt / 100 > 0) |
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209 *p2++ = decpt / 100 + '0'; |
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210 if (decpt / 10 > 0) |
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211 *p2++ = (decpt % 100) / 10 + '0'; |
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212 *p2++ = decpt % 10 + '0'; |
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213 } else { |
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214 if (decpt <= 0) { |
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215 if (*p1 != '0') |
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216 *p2++ = '.'; |
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217 while (decpt < 0) { |
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218 decpt++; |
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219 *p2++ = '0'; |
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220 } |
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221 } |
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222 for (i = 1; i <= ndigit; i++) { |
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223 *p2++ = *p1++; |
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224 if (i == decpt) |
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225 *p2++ = '.'; |
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226 } |
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227 if (ndigit < decpt) { |
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228 while (ndigit++ < decpt) |
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229 *p2++ = '0'; |
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230 *p2++ = '.'; |
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231 } |
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232 } |
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233 if (p2[-1] == '.') |
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234 p2--; |
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235 *p2 = '\0'; |
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236 return (buf); |
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237 } |
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238 |
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239 #endif /* HAVE_CVT */ |
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240 |
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241 typedef enum { |
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242 NO = 0, YES = 1 |
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243 } boolean_e; |
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244 |
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245 #define FALSE 0 |
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246 #define TRUE 1 |
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247 #define NUL '\0' |
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248 #define INT_NULL ((int *)0) |
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249 #define WIDE_INT long |
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250 |
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251 typedef WIDE_INT wide_int; |
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252 typedef unsigned WIDE_INT u_wide_int; |
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253 typedef int bool_int; |
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254 |
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255 #define S_NULL "(null)" |
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256 #define S_NULL_LEN 6 |
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257 |
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258 #define FLOAT_DIGITS 6 |
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259 #define EXPONENT_LENGTH 10 |
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260 |
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261 /* |
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262 * NUM_BUF_SIZE is the size of the buffer used for arithmetic conversions |
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263 * |
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264 * XXX: this is a magic number; do not decrease it |
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265 */ |
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266 #define NUM_BUF_SIZE 512 |
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267 |
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268 |
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269 /* |
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270 * Descriptor for buffer area |
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271 */ |
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272 struct buf_area { |
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273 char *buf_end; |
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274 char *nextb; /* pointer to next byte to read/write */ |
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275 }; |
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276 |
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277 typedef struct buf_area buffy; |
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278 |
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279 /* |
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280 * The INS_CHAR macro inserts a character in the buffer and writes |
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281 * the buffer back to disk if necessary |
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282 * It uses the char pointers sp and bep: |
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283 * sp points to the next available character in the buffer |
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284 * bep points to the end-of-buffer+1 |
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285 * While using this macro, note that the nextb pointer is NOT updated. |
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286 * |
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287 * NOTE: Evaluation of the c argument should not have any side-effects |
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288 */ |
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289 #define INS_CHAR( c, sp, bep, cc ) \ |
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290 { \ |
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291 if ( sp < bep ) \ |
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292 { \ |
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293 *sp++ = c ; \ |
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294 cc++ ; \ |
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295 } \ |
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296 } |
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297 |
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298 #define NUM( c ) ( c - '0' ) |
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299 |
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300 #define STR_TO_DEC( str, num ) \ |
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301 num = NUM( *str++ ) ; \ |
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302 while ( isdigit((int)*str ) ) \ |
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303 { \ |
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304 num *= 10 ; \ |
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305 num += NUM( *str++ ) ; \ |
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306 } |
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307 |
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308 /* |
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309 * This macro does zero padding so that the precision |
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310 * requirement is satisfied. The padding is done by |
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311 * adding '0's to the left of the string that is going |
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312 * to be printed. |
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313 */ |
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314 #define FIX_PRECISION( adjust, precision, s, s_len ) \ |
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315 if ( adjust ) \ |
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316 while ( s_len < precision ) \ |
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317 { \ |
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318 *--s = '0' ; \ |
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319 s_len++ ; \ |
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320 } |
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321 |
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322 /* |
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323 * Macro that does padding. The padding is done by printing |
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324 * the character ch. |
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325 */ |
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326 #define PAD( width, len, ch ) do \ |
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327 { \ |
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328 INS_CHAR( ch, sp, bep, cc ) ; \ |
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329 width-- ; \ |
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330 } \ |
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331 while ( width > len ) |
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332 |
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333 /* |
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334 * Prefix the character ch to the string str |
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335 * Increase length |
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336 * Set the has_prefix flag |
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337 */ |
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338 #define PREFIX( str, length, ch ) *--str = ch ; length++ ; has_prefix = YES |
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339 |
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340 |
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341 /* |
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342 * Convert num to its decimal format. |
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343 * Return value: |
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344 * - a pointer to a string containing the number (no sign) |
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345 * - len contains the length of the string |
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346 * - is_negative is set to TRUE or FALSE depending on the sign |
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347 * of the number (always set to FALSE if is_unsigned is TRUE) |
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348 * |
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349 * The caller provides a buffer for the string: that is the buf_end argument |
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350 * which is a pointer to the END of the buffer + 1 (i.e. if the buffer |
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351 * is declared as buf[ 100 ], buf_end should be &buf[ 100 ]) |
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352 */ |
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353 static char * |
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354 conv_10(register wide_int num, register bool_int is_unsigned, |
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355 register bool_int * is_negative, char *buf_end, register int *len) |
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356 { |
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357 register char *p = buf_end; |
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358 register u_wide_int magnitude; |
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359 |
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360 if (is_unsigned) { |
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361 magnitude = (u_wide_int) num; |
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362 *is_negative = FALSE; |
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363 } else { |
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364 *is_negative = (num < 0); |
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365 |
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366 /* |
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367 * On a 2's complement machine, negating the most negative integer |
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368 * results in a number that cannot be represented as a signed integer. |
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369 * Here is what we do to obtain the number's magnitude: |
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370 * a. add 1 to the number |
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371 * b. negate it (becomes positive) |
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372 * c. convert it to unsigned |
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373 * d. add 1 |
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374 */ |
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375 if (*is_negative) { |
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376 wide_int t = num + 1; |
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377 |
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378 magnitude = ((u_wide_int) - t) + 1; |
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379 } else |
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380 magnitude = (u_wide_int) num; |
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381 } |
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382 |
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383 /* |
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384 * We use a do-while loop so that we write at least 1 digit |
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385 */ |
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386 do { |
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387 register u_wide_int new_magnitude = magnitude / 10; |
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388 |
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389 *--p = magnitude - new_magnitude * 10 + '0'; |
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390 magnitude = new_magnitude; |
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391 } |
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392 while (magnitude); |
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393 |
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394 *len = buf_end - p; |
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395 return (p); |
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396 } |
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397 |
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398 |
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399 |
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400 /* |
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401 * Convert a floating point number to a string formats 'f', 'e' or 'E'. |
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402 * The result is placed in buf, and len denotes the length of the string |
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403 * The sign is returned in the is_negative argument (and is not placed |
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404 * in buf). |
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405 */ |
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406 static char * |
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407 conv_fp(register char format, register double num, |
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408 boolean_e add_dp, int precision, bool_int * is_negative, char *buf, int *len) |
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409 { |
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410 register char *s = buf; |
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411 register char *p; |
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412 int decimal_point; |
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413 |
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414 if (format == 'f') |
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415 p = ap_fcvt(num, precision, &decimal_point, is_negative); |
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416 else /* either e or E format */ |
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417 p = ap_ecvt(num, precision + 1, &decimal_point, is_negative); |
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418 |
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419 /* |
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420 * Check for Infinity and NaN |
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421 */ |
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422 if (isalpha((int)*p)) { |
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423 *len = strlen(strcpy(buf, p)); |
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424 *is_negative = FALSE; |
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425 return (buf); |
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426 } |
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427 if (format == 'f') { |
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428 if (decimal_point <= 0) { |
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429 *s++ = '0'; |
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430 if (precision > 0) { |
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431 *s++ = '.'; |
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432 while (decimal_point++ < 0) |
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433 *s++ = '0'; |
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434 } else if (add_dp) { |
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435 *s++ = '.'; |
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436 } |
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437 } else { |
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438 while (decimal_point-- > 0) { |
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439 *s++ = *p++; |
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440 } |
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441 if (precision > 0 || add_dp) { |
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442 *s++ = '.'; |
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443 } |
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444 } |
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445 } else { |
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446 *s++ = *p++; |
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447 if (precision > 0 || add_dp) |
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448 *s++ = '.'; |
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449 } |
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450 |
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451 /* |
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452 * copy the rest of p, the NUL is NOT copied |
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453 */ |
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454 while (*p) |
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455 *s++ = *p++; |
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456 |
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457 if (format != 'f') { |
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458 char temp[EXPONENT_LENGTH]; /* for exponent conversion */ |
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459 int t_len; |
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460 bool_int exponent_is_negative; |
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461 |
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462 *s++ = format; /* either e or E */ |
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463 decimal_point--; |
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464 if (decimal_point != 0) { |
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465 p = conv_10((wide_int) decimal_point, FALSE, &exponent_is_negative, |
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466 &temp[EXPONENT_LENGTH], &t_len); |
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467 *s++ = exponent_is_negative ? '-' : '+'; |
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468 |
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469 /* |
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470 * Make sure the exponent has at least 2 digits |
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471 */ |
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472 if (t_len == 1) |
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473 *s++ = '0'; |
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474 while (t_len--) |
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475 *s++ = *p++; |
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476 } else { |
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477 *s++ = '+'; |
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478 *s++ = '0'; |
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479 *s++ = '0'; |
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480 } |
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481 } |
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482 *len = s - buf; |
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483 return (buf); |
|
|
484 } |
|
|
485 |
|
|
486 |
|
|
487 /* |
|
|
488 * Convert num to a base X number where X is a power of 2. nbits determines X. |
|
|
489 * For example, if nbits is 3, we do base 8 conversion |
|
|
490 * Return value: |
|
|
491 * a pointer to a string containing the number |
|
|
492 * |
|
|
493 * The caller provides a buffer for the string: that is the buf_end argument |
|
|
494 * which is a pointer to the END of the buffer + 1 (i.e. if the buffer |
|
|
495 * is declared as buf[ 100 ], buf_end should be &buf[ 100 ]) |
|
|
496 */ |
|
|
497 static char * |
|
|
498 conv_p2(register u_wide_int num, register int nbits, |
|
|
499 char format, char *buf_end, register int *len) |
|
|
500 { |
|
|
501 register int mask = (1 << nbits) - 1; |
|
|
502 register char *p = buf_end; |
|
|
503 static char low_digits[] = "0123456789abcdef"; |
|
|
504 static char upper_digits[] = "0123456789ABCDEF"; |
|
|
505 register char *digits = (format == 'X') ? upper_digits : low_digits; |
|
|
506 |
|
|
507 do { |
|
|
508 *--p = digits[num & mask]; |
|
|
509 num >>= nbits; |
|
|
510 } |
|
|
511 while (num); |
|
|
512 |
|
|
513 *len = buf_end - p; |
|
|
514 return (p); |
|
|
515 } |
|
|
516 |
|
|
517 |
|
|
518 /* |
|
|
519 * Do format conversion placing the output in buffer |
|
|
520 */ |
|
|
521 static int format_converter(register buffy * odp, const char *fmt, |
|
|
522 va_list ap) |
|
|
523 { |
|
|
524 register char *sp; |
|
|
525 register char *bep; |
|
|
526 register int cc = 0; |
|
|
527 register int i; |
|
|
528 |
|
|
529 register char *s = NULL; |
|
|
530 char *q; |
|
|
531 int s_len; |
|
|
532 |
|
|
533 register int min_width = 0; |
|
|
534 int precision = 0; |
|
|
535 enum { |
|
|
536 LEFT, RIGHT |
|
|
537 } adjust; |
|
|
538 char pad_char; |
|
|
539 char prefix_char; |
|
|
540 |
|
|
541 double fp_num; |
|
|
542 wide_int i_num = (wide_int) 0; |
|
|
543 u_wide_int ui_num; |
|
|
544 |
|
|
545 char num_buf[NUM_BUF_SIZE]; |
|
|
546 char char_buf[2]; /* for printing %% and %<unknown> */ |
|
|
547 |
|
|
548 /* |
|
|
549 * Flag variables |
|
|
550 */ |
|
|
551 boolean_e is_long; |
|
|
552 boolean_e alternate_form; |
|
|
553 boolean_e print_sign; |
|
|
554 boolean_e print_blank; |
|
|
555 boolean_e adjust_precision; |
|
|
556 boolean_e adjust_width; |
|
|
557 bool_int is_negative; |
|
|
558 |
|
|
559 sp = odp->nextb; |
|
|
560 bep = odp->buf_end; |
|
|
561 |
|
|
562 while (*fmt) { |
|
|
563 if (*fmt != '%') { |
|
|
564 INS_CHAR(*fmt, sp, bep, cc); |
|
|
565 } else { |
|
|
566 /* |
|
|
567 * Default variable settings |
|
|
568 */ |
|
|
569 adjust = RIGHT; |
|
|
570 alternate_form = print_sign = print_blank = NO; |
|
|
571 pad_char = ' '; |
|
|
572 prefix_char = NUL; |
|
|
573 |
|
|
574 fmt++; |
|
|
575 |
|
|
576 /* |
|
|
577 * Try to avoid checking for flags, width or precision |
|
|
578 */ |
|
|
579 if (isascii((int)*fmt) && !islower((int)*fmt)) { |
|
|
580 /* |
|
|
581 * Recognize flags: -, #, BLANK, + |
|
|
582 */ |
|
|
583 for (;; fmt++) { |
|
|
584 if (*fmt == '-') |
|
|
585 adjust = LEFT; |
|
|
586 else if (*fmt == '+') |
|
|
587 print_sign = YES; |
|
|
588 else if (*fmt == '#') |
|
|
589 alternate_form = YES; |
|
|
590 else if (*fmt == ' ') |
|
|
591 print_blank = YES; |
|
|
592 else if (*fmt == '0') |
|
|
593 pad_char = '0'; |
|
|
594 else |
|
|
595 break; |
|
|
596 } |
|
|
597 |
|
|
598 /* |
|
|
599 * Check if a width was specified |
|
|
600 */ |
|
|
601 if (isdigit((int)*fmt)) { |
|
|
602 STR_TO_DEC(fmt, min_width); |
|
|
603 adjust_width = YES; |
|
|
604 } else if (*fmt == '*') { |
|
|
605 min_width = va_arg(ap, int); |
|
|
606 fmt++; |
|
|
607 adjust_width = YES; |
|
|
608 if (min_width < 0) { |
|
|
609 adjust = LEFT; |
|
|
610 min_width = -min_width; |
|
|
611 } |
|
|
612 } else |
|
|
613 adjust_width = NO; |
|
|
614 |
|
|
615 /* |
|
|
616 * Check if a precision was specified |
|
|
617 * |
|
|
618 * XXX: an unreasonable amount of precision may be specified |
|
|
619 * resulting in overflow of num_buf. Currently we |
|
|
620 * ignore this possibility. |
|
|
621 */ |
|
|
622 if (*fmt == '.') { |
|
|
623 adjust_precision = YES; |
|
|
624 fmt++; |
|
|
625 if (isdigit((int)*fmt)) { |
|
|
626 STR_TO_DEC(fmt, precision); |
|
|
627 } else if (*fmt == '*') { |
|
|
628 precision = va_arg(ap, int); |
|
|
629 fmt++; |
|
|
630 if (precision < 0) |
|
|
631 precision = 0; |
|
|
632 } else |
|
|
633 precision = 0; |
|
|
634 } else |
|
|
635 adjust_precision = NO; |
|
|
636 } else |
|
|
637 adjust_precision = adjust_width = NO; |
|
|
638 |
|
|
639 /* |
|
|
640 * Modifier check |
|
|
641 */ |
|
|
642 if (*fmt == 'l') { |
|
|
643 is_long = YES; |
|
|
644 fmt++; |
|
|
645 } else |
|
|
646 is_long = NO; |
|
|
647 |
|
|
648 /* |
|
|
649 * Argument extraction and printing. |
|
|
650 * First we determine the argument type. |
|
|
651 * Then, we convert the argument to a string. |
|
|
652 * On exit from the switch, s points to the string that |
|
|
653 * must be printed, s_len has the length of the string |
|
|
654 * The precision requirements, if any, are reflected in s_len. |
|
|
655 * |
|
|
656 * NOTE: pad_char may be set to '0' because of the 0 flag. |
|
|
657 * It is reset to ' ' by non-numeric formats |
|
|
658 */ |
|
|
659 switch (*fmt) { |
|
|
660 case 'u': |
|
|
661 if (is_long) |
|
|
662 i_num = va_arg(ap, u_wide_int); |
|
|
663 else |
|
|
664 i_num = (wide_int) va_arg(ap, unsigned int); |
|
|
665 /* |
|
|
666 * The rest also applies to other integer formats, so fall |
|
|
667 * into that case. |
|
|
668 */ |
|
|
669 case 'd': |
|
|
670 case 'i': |
|
|
671 /* |
|
|
672 * Get the arg if we haven't already. |
|
|
673 */ |
|
|
674 if ((*fmt) != 'u') { |
|
|
675 if (is_long) |
|
|
676 i_num = va_arg(ap, wide_int); |
|
|
677 else |
|
|
678 i_num = (wide_int) va_arg(ap, int); |
|
|
679 }; |
|
|
680 s = conv_10(i_num, (*fmt) == 'u', &is_negative, |
|
|
681 &num_buf[NUM_BUF_SIZE], &s_len); |
|
|
682 FIX_PRECISION(adjust_precision, precision, s, s_len); |
|
|
683 |
|
|
684 if (*fmt != 'u') { |
|
|
685 if (is_negative) |
|
|
686 prefix_char = '-'; |
|
|
687 else if (print_sign) |
|
|
688 prefix_char = '+'; |
|
|
689 else if (print_blank) |
|
|
690 prefix_char = ' '; |
|
|
691 } |
|
|
692 break; |
|
|
693 |
|
|
694 |
|
|
695 case 'o': |
|
|
696 if (is_long) |
|
|
697 ui_num = va_arg(ap, u_wide_int); |
|
|
698 else |
|
|
699 ui_num = (u_wide_int) va_arg(ap, unsigned int); |
|
|
700 s = conv_p2(ui_num, 3, *fmt, |
|
|
701 &num_buf[NUM_BUF_SIZE], &s_len); |
|
|
702 FIX_PRECISION(adjust_precision, precision, s, s_len); |
|
|
703 if (alternate_form && *s != '0') { |
|
|
704 *--s = '0'; |
|
|
705 s_len++; |
|
|
706 } |
|
|
707 break; |
|
|
708 |
|
|
709 |
|
|
710 case 'x': |
|
|
711 case 'X': |
|
|
712 if (is_long) |
|
|
713 ui_num = (u_wide_int) va_arg(ap, u_wide_int); |
|
|
714 else |
|
|
715 ui_num = (u_wide_int) va_arg(ap, unsigned int); |
|
|
716 s = conv_p2(ui_num, 4, *fmt, |
|
|
717 &num_buf[NUM_BUF_SIZE], &s_len); |
|
|
718 FIX_PRECISION(adjust_precision, precision, s, s_len); |
|
|
719 if (alternate_form && i_num != 0) { |
|
|
720 *--s = *fmt; /* 'x' or 'X' */ |
|
|
721 *--s = '0'; |
|
|
722 s_len += 2; |
|
|
723 } |
|
|
724 break; |
|
|
725 |
|
|
726 |
|
|
727 case 's': |
|
|
728 s = va_arg(ap, char *); |
|
|
729 if (s != NULL) { |
|
|
730 s_len = strlen(s); |
|
|
731 if (adjust_precision && precision < s_len) |
|
|
732 s_len = precision; |
|
|
733 } else { |
|
|
734 s = S_NULL; |
|
|
735 s_len = S_NULL_LEN; |
|
|
736 } |
|
|
737 pad_char = ' '; |
|
|
738 break; |
|
|
739 |
|
|
740 |
|
|
741 case 'f': |
|
|
742 case 'e': |
|
|
743 case 'E': |
|
|
744 fp_num = va_arg(ap, double); |
|
|
745 |
|
|
746 s = conv_fp(*fmt, fp_num, alternate_form, |
|
|
747 (adjust_precision == NO) ? FLOAT_DIGITS : precision, |
|
|
748 &is_negative, &num_buf[1], &s_len); |
|
|
749 if (is_negative) |
|
|
750 prefix_char = '-'; |
|
|
751 else if (print_sign) |
|
|
752 prefix_char = '+'; |
|
|
753 else if (print_blank) |
|
|
754 prefix_char = ' '; |
|
|
755 break; |
|
|
756 |
|
|
757 |
|
|
758 case 'g': |
|
|
759 case 'G': |
|
|
760 if (adjust_precision == NO) |
|
|
761 precision = FLOAT_DIGITS; |
|
|
762 else if (precision == 0) |
|
|
763 precision = 1; |
|
|
764 /* |
|
|
765 * * We use &num_buf[ 1 ], so that we have room for the sign |
|
|
766 */ |
|
|
767 s = ap_gcvt(va_arg(ap, double), precision, &num_buf[1]); |
|
|
768 if (*s == '-') |
|
|
769 prefix_char = *s++; |
|
|
770 else if (print_sign) |
|
|
771 prefix_char = '+'; |
|
|
772 else if (print_blank) |
|
|
773 prefix_char = ' '; |
|
|
774 |
|
|
775 s_len = strlen(s); |
|
|
776 |
|
|
777 if (alternate_form && (q = strchr(s, '.')) == NULL) |
|
|
778 s[s_len++] = '.'; |
|
|
779 if (*fmt == 'G' && (q = strchr(s, 'e')) != NULL) |
|
|
780 *q = 'E'; |
|
|
781 break; |
|
|
782 |
|
|
783 |
|
|
784 case 'c': |
|
|
785 char_buf[0] = (char) (va_arg(ap, int)); |
|
|
786 s = &char_buf[0]; |
|
|
787 s_len = 1; |
|
|
788 pad_char = ' '; |
|
|
789 break; |
|
|
790 |
|
|
791 |
|
|
792 case '%': |
|
|
793 char_buf[0] = '%'; |
|
|
794 s = &char_buf[0]; |
|
|
795 s_len = 1; |
|
|
796 pad_char = ' '; |
|
|
797 break; |
|
|
798 |
|
|
799 |
|
|
800 case 'n': |
|
|
801 *(va_arg(ap, int *)) = cc; |
|
|
802 break; |
|
|
803 |
|
|
804 /* |
|
|
805 * Always extract the argument as a "char *" pointer. We |
|
|
806 * should be using "void *" but there are still machines |
|
|
807 * that don't understand it. |
|
|
808 * If the pointer size is equal to the size of an unsigned |
|
|
809 * integer we convert the pointer to a hex number, otherwise |
|
|
810 * we print "%p" to indicate that we don't handle "%p". |
|
|
811 */ |
|
|
812 case 'p': |
|
|
813 ui_num = (u_wide_int) va_arg(ap, char *); |
|
|
814 |
|
|
815 if (sizeof(char *) <= sizeof(u_wide_int)) |
|
|
816 s = conv_p2(ui_num, 4, 'x', |
|
|
817 &num_buf[NUM_BUF_SIZE], &s_len); |
|
|
818 else { |
|
|
819 s = "%p"; |
|
|
820 s_len = 2; |
|
|
821 } |
|
|
822 pad_char = ' '; |
|
|
823 break; |
|
|
824 |
|
|
825 |
|
|
826 case NUL: |
|
|
827 /* |
|
|
828 * The last character of the format string was %. |
|
|
829 * We ignore it. |
|
|
830 */ |
|
|
831 continue; |
|
|
832 |
|
|
833 |
|
|
834 /* |
|
|
835 * The default case is for unrecognized %'s. |
|
|
836 * We print %<char> to help the user identify what |
|
|
837 * option is not understood. |
|
|
838 * This is also useful in case the user wants to pass |
|
|
839 * the output of format_converter to another function |
|
|
840 * that understands some other %<char> (like syslog). |
|
|
841 * Note that we can't point s inside fmt because the |
|
|
842 * unknown <char> could be preceded by width etc. |
|
|
843 */ |
|
|
844 default: |
|
|
845 char_buf[0] = '%'; |
|
|
846 char_buf[1] = *fmt; |
|
|
847 s = char_buf; |
|
|
848 s_len = 2; |
|
|
849 pad_char = ' '; |
|
|
850 break; |
|
|
851 } |
|
|
852 |
|
|
853 if (prefix_char != NUL) { |
|
|
854 *--s = prefix_char; |
|
|
855 s_len++; |
|
|
856 } |
|
|
857 if (adjust_width && adjust == RIGHT && min_width > s_len) { |
|
|
858 if (pad_char == '0' && prefix_char != NUL) { |
|
|
859 INS_CHAR(*s, sp, bep, cc) |
|
|
860 s++; |
|
|
861 s_len--; |
|
|
862 min_width--; |
|
|
863 } |
|
|
864 PAD(min_width, s_len, pad_char); |
|
|
865 } |
|
|
866 /* |
|
|
867 * Print the string s. |
|
|
868 */ |
|
|
869 for (i = s_len; i != 0; i--) { |
|
|
870 INS_CHAR(*s, sp, bep, cc); |
|
|
871 s++; |
|
|
872 } |
|
|
873 |
|
|
874 if (adjust_width && adjust == LEFT && min_width > s_len) |
|
|
875 PAD(min_width, s_len, pad_char); |
|
|
876 } |
|
|
877 fmt++; |
|
|
878 } |
|
|
879 odp->nextb = sp; |
|
|
880 return (cc); |
|
|
881 } |
|
|
882 |
|
|
883 |
|
|
884 /* |
|
|
885 * This is the general purpose conversion function. |
|
|
886 */ |
|
|
887 static void strx_printv(int *ccp, char *buf, size_t len, const char *format, |
|
|
888 va_list ap) |
|
|
889 { |
|
|
890 buffy od; |
|
|
891 int cc; |
|
|
892 |
|
|
893 /* |
|
|
894 * First initialize the descriptor |
|
|
895 * Notice that if no length is given, we initialize buf_end to the |
|
|
896 * highest possible address. |
|
|
897 */ |
|
|
898 od.buf_end = len ? &buf[len] : (char *) ~0; |
|
|
899 od.nextb = buf; |
|
|
900 |
|
|
901 /* |
|
|
902 * Do the conversion |
|
|
903 */ |
|
|
904 cc = format_converter(&od, format, ap); |
|
|
905 if (len == 0 || od.nextb <= od.buf_end) |
|
|
906 *(od.nextb) = '\0'; |
|
|
907 if (ccp) |
|
|
908 *ccp = cc; |
|
|
909 } |
|
|
910 |
|
|
911 |
|
|
912 int ap_snprintf(char *buf, size_t len, const char *format,...) |
|
|
913 { |
|
|
914 int cc; |
|
|
915 va_list ap; |
|
|
916 |
|
|
917 va_start(ap, format); |
|
|
918 strx_printv(&cc, buf, (len - 1), format, ap); |
|
|
919 va_end(ap); |
|
|
920 return (cc); |
|
|
921 } |
|
|
922 |
|
|
923 |
|
|
924 int ap_vsnprintf(char *buf, size_t len, const char *format, va_list ap) |
|
|
925 { |
|
|
926 int cc; |
|
|
927 |
|
|
928 strx_printv(&cc, buf, (len - 1), format, ap); |
|
|
929 return (cc); |
|
|
930 } |
|
|
931 |
|
|
932 #endif /* HAVE_SNPRINTF */ |
