Mercurial > flash_v2

annotate packages/redboot/current/src/printf.c @ 143:6b5f480c6929 ecos-sw-2000-12-08

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Merge from eCos master repository on 2000-12-08-02:09:36-GMT
author jlarmour
date Fri, 08 Dec 2000 03:30:06 +0000
parents 6ed91473a1cd
children e2d866e32dac
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115
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1 //==========================================================================
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2 //
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3 // printf.c
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4 //
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5 // Stand-alone minimal printf support for RedBoot
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6 //
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7 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): gthomas
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35 // Contributors: gthomas
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36 // Date: 2000-07-14
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37 // Purpose:
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38 // Description:
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39 //
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40 // This code is part of RedBoot (tm).
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41 //
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42 //####DESCRIPTIONEND####
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43 //
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44 //==========================================================================
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45
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46 #include <stdarg.h>
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47 #include <redboot.h>
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48
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49 static int
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50 _cvt(unsigned long val, char *buf, long radix, char *digits)
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51 {
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52 char temp[80];
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53 char *cp = temp;
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54 int length = 0;
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55 if (val == 0) {
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56 /* Special case */
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57 *cp++ = '0';
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58 } else {
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59 while (val) {
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60 *cp++ = digits[val % radix];
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61 val /= radix;
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62 }
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63 }
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64 while (cp != temp) {
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65 *buf++ = *--cp;
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66 length++;
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67 }
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68 *buf = '\0';
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69 return (length);
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70 }
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71
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72 #define is_digit(c) ((c >= '0') && (c <= '9'))
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73
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74 static int
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75 _vprintf(void (*putc)(char c), char *fmt0, va_list ap)
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76 {
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77 char buf[32];
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78 char c, sign, *cp=buf;
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79 int left_prec, right_prec, zero_fill, pad, pad_on_right;
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80 long val;
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81 int res = 0, length = 0;
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82 while ((c = *fmt0++) != '\0') {
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83 if (c == '%') {
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84 c = *fmt0++;
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85 left_prec = right_prec = pad_on_right = 0;
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86 if (c == '-') {
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87 c = *fmt0++;
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88 pad_on_right++;
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89 }
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90 if (c == '0') {
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91 zero_fill = true;
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92 c = *fmt0++;
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93 } else {
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94 zero_fill = false;
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95 }
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96 while (is_digit(c)) {
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97 left_prec = (left_prec * 10) + (c - '0');
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98 c = *fmt0++;
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99 }
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100 if (c == '.') {
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101 c = *fmt0++;
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102 zero_fill++;
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103 while (is_digit(c)) {
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104 right_prec = (right_prec * 10) + (c - '0');
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105 c = *fmt0++;
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106 }
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107 } else {
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108 right_prec = left_prec;
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109 }
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110 sign = '\0';
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111 if (c == 'l') {
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112 // 'long' qualifier
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113 c = *fmt0++;
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114 }
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115 switch (c) {
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116 case 'p': // Pointer
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117 (*putc)('0');
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118 (*putc)('x');
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119 zero_fill = true;
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120 left_prec = sizeof(unsigned long)*2;
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121 case 'd':
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122 case 'x':
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123 case 'X':
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124 val = va_arg(ap, long);
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125 switch (c) {
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126 case 'd':
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127 if (val < 0) {
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128 sign = '-';
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129 val = -val;
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130 }
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131 length = _cvt(val, buf, 10, "0123456789");
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132 break;
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133 case 'p':
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134 case 'x':
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135 length = _cvt(val, buf, 16, "0123456789abcdef");
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136 break;
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137 case 'X':
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138 length = _cvt(val, buf, 16, "0123456789ABCDEF");
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139 break;
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140 }
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141 cp = buf;
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142 break;
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143 case 's':
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144 cp = va_arg(ap, char *);
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145 length = strlen(cp);
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146 break;
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147 case 'c':
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148 c = va_arg(ap, long /*char*/);
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149 (*putc)(c);
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150 res++;
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151 continue;
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152 default:
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153 (*putc)('?');
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154 res++;
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155 }
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156 pad = left_prec - length;
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157 if (sign != '\0') {
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158 pad--;
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159 }
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160 if (zero_fill) {
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161 c = '0';
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162 if (sign != '\0') {
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163 (*putc)(sign);
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164 res++;
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165 sign = '\0';
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166 }
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167 } else {
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168 c = ' ';
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169 }
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170 if (!pad_on_right) {
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171 while (pad-- > 0) {
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172 (*putc)(c);
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173 res++;
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174 }
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175 }
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176 if (sign != '\0') {
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177 (*putc)(sign);
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178 res++;
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179 }
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180 while (length-- > 0) {
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181 (*putc)(c = *cp++);
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182 res++;
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183 if (c == '\n') {
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184 (*putc)('\r');
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185 res++;
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186 }
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187 }
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188 if (pad_on_right) {
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189 while (pad-- > 0) {
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190 (*putc)(' ');
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191 res++;
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192 }
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193 }
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194 } else {
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195 (*putc)(c);
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196 res++;
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197 if (c == '\n') {
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198 (*putc)('\r');
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199 res++;
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200 }
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201 }
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202 }
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203 return (res);
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204 }
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205
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206 static char *_sprintf_ptr;
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207
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208 static void
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209 _sputc(char c)
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210 {
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211 *_sprintf_ptr++ = c;
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212 *_sprintf_ptr = '\0';
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213 }
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214
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215 int
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216 sprintf(char *buf, char *fmt, ...)
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217 {
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218 int ret;
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219 va_list ap;
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220
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221 va_start(ap, fmt);
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222 _sprintf_ptr = buf;
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223 ret = _vprintf(_sputc, fmt, ap);
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224 va_end(ap);
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225 return (ret);
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226 }
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227
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228 int
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229 vsprintf(char *buf, char *fmt, va_list ap)
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230 {
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231 int ret;
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232
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233 _sprintf_ptr = buf;
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234 ret = _vprintf(_sputc, fmt, ap);
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235 return (ret);
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236 }
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237
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238 extern void mon_write_char(char);
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239
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240 int
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241 printf(char *fmt, ...)
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242 {
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243 va_list ap;
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244 int ret;
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245
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246 va_start(ap, fmt);
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247 ret = _vprintf(mon_write_char, fmt, ap);
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248 va_end(ap);
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249 return (ret);
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250 }
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251
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252 int
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253 vprintf(char *fmt, va_list ap)
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254 {
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255 int ret;
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256
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257 ret = _vprintf(mon_write_char, fmt, ap);
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258 return (ret);
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259 }
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260