vsprintf.c

linux0.11 version(301k)

<a name=L108 href="source/kernel/vsprintf.c#L108">108</a>                 if (*fmt != <i>'%'</i>) {
<a name=L109 href="source/kernel/vsprintf.c#L109">109</a>                         *<a href="ident?i=str">str</a>++ = *fmt;
<a name=L110 href="source/kernel/vsprintf.c#L110">110</a>                         continue;
<a name=L111 href="source/kernel/vsprintf.c#L111">111</a>                 }
<a name=L112 href="source/kernel/vsprintf.c#L112">112</a>                         
<a name=L113 href="source/kernel/vsprintf.c#L113">113</a>                 <b><i>/* process flags */</i></b>
<a name=L114 href="source/kernel/vsprintf.c#L114">114</a>                 flags = 0;
<a name=L115 href="source/kernel/vsprintf.c#L115">115</a>                 repeat:
<a name=L116 href="source/kernel/vsprintf.c#L116">116</a>                         ++fmt;          <b><i>/* this also skips first '%' */</i></b>
<a name=L117 href="source/kernel/vsprintf.c#L117">117</a>                         switch (*fmt) {
<a name=L118 href="source/kernel/vsprintf.c#L118">118</a>                                 case <i>'-'</i>: flags |= <a href="ident?i=LEFT">LEFT</a>; goto repeat;
<a name=L119 href="source/kernel/vsprintf.c#L119">119</a>                                 case <i>'+'</i>: flags |= <a href="ident?i=PLUS">PLUS</a>; goto repeat;
<a name=L120 href="source/kernel/vsprintf.c#L120">120</a>                                 case <i>' '</i>: flags |= <a href="ident?i=SPACE">SPACE</a>; goto repeat;
<a name=L121 href="source/kernel/vsprintf.c#L121">121</a>                                 case <i>'#'</i>: flags |= <a href="ident?i=SPECIAL">SPECIAL</a>; goto repeat;
<a name=L122 href="source/kernel/vsprintf.c#L122">122</a>                                 case <i>''</i>: flags |= <a href="ident?i=ZEROPAD">ZEROPAD</a>; goto repeat;
<a name=L123 href="source/kernel/vsprintf.c#L123">123</a>                                 }
<a name=L124 href="source/kernel/vsprintf.c#L124">124</a>                 
<a name=L125 href="source/kernel/vsprintf.c#L125">125</a>                 <b><i>/* get field width */</i></b>
<a name=L126 href="source/kernel/vsprintf.c#L126">126</a>                 field_width = -1;
<a name=L127 href="source/kernel/vsprintf.c#L127">127</a>                 if (<a href="ident?i=is_digit">is_digit</a>(*fmt))
<a name=L128 href="source/kernel/vsprintf.c#L128">128</a>                         field_width = <a href="ident?i=skip_atoi">skip_atoi</a>(&amp;fmt);
<a name=L129 href="source/kernel/vsprintf.c#L129">129</a>                 else if (*fmt == <i>'*'</i>) {
<a name=L130 href="source/kernel/vsprintf.c#L130">130</a>                         <b><i>/* it's the next argument */</i></b>
<a name=L131 href="source/kernel/vsprintf.c#L131">131</a>                         field_width = <a href="ident?i=va_arg">va_arg</a>(args, int);
<a name=L132 href="source/kernel/vsprintf.c#L132">132</a>                         if (field_width &lt; 0) {
<a name=L133 href="source/kernel/vsprintf.c#L133">133</a>                                 field_width = -field_width;
<a name=L134 href="source/kernel/vsprintf.c#L134">134</a>                                 flags |= <a href="ident?i=LEFT">LEFT</a>;
<a name=L135 href="source/kernel/vsprintf.c#L135">135</a>                         }
<a name=L136 href="source/kernel/vsprintf.c#L136">136</a>                 }
<a name=L137 href="source/kernel/vsprintf.c#L137">137</a> 
<a name=L138 href="source/kernel/vsprintf.c#L138">138</a>                 <b><i>/* get the precision */</i></b>
<a name=L139 href="source/kernel/vsprintf.c#L139">139</a>                 precision = -1;
<a name=L140 href="source/kernel/vsprintf.c#L140">140</a>                 if (*fmt == <i>'.'</i>) {
<a name=L141 href="source/kernel/vsprintf.c#L141">141</a>                         ++fmt;  
<a name=L142 href="source/kernel/vsprintf.c#L142">142</a>                         if (<a href="ident?i=is_digit">is_digit</a>(*fmt))
<a name=L143 href="source/kernel/vsprintf.c#L143">143</a>                                 precision = <a href="ident?i=skip_atoi">skip_atoi</a>(&amp;fmt);
<a name=L144 href="source/kernel/vsprintf.c#L144">144</a>                         else if (*fmt == <i>'*'</i>) {
<a name=L145 href="source/kernel/vsprintf.c#L145">145</a>                                 <b><i>/* it's the next argument */</i></b>
<a name=L146 href="source/kernel/vsprintf.c#L146">146</a>                                 precision = <a href="ident?i=va_arg">va_arg</a>(args, int);
<a name=L147 href="source/kernel/vsprintf.c#L147">147</a>                         }
<a name=L148 href="source/kernel/vsprintf.c#L148">148</a>                         if (precision &lt; 0)
<a name=L149 href="source/kernel/vsprintf.c#L149">149</a>                                 precision = 0;
<a name=L150 href="source/kernel/vsprintf.c#L150">150</a>                 }
<a name=L151 href="source/kernel/vsprintf.c#L151">151</a> 
<a name=L152 href="source/kernel/vsprintf.c#L152">152</a>                 <b><i>/* get the conversion qualifier */</i></b>
<a name=L153 href="source/kernel/vsprintf.c#L153">153</a>                 qualifier = -1;
<a name=L154 href="source/kernel/vsprintf.c#L154">154</a>                 if (*fmt == <i>'h'</i> || *fmt == <i>'l'</i> || *fmt == <i>'L'</i>) {
<a name=L155 href="source/kernel/vsprintf.c#L155">155</a>                         qualifier = *fmt;
<a name=L156 href="source/kernel/vsprintf.c#L156">156</a>                         ++fmt;
<a name=L157 href="source/kernel/vsprintf.c#L157">157</a>                 }
<a name=L158 href="source/kernel/vsprintf.c#L158">158</a> 
<a name=L159 href="source/kernel/vsprintf.c#L159">159</a>                 switch (*fmt) {
<a name=L160 href="source/kernel/vsprintf.c#L160">160</a>                 case <i>'c'</i>:
<a name=L161 href="source/kernel/vsprintf.c#L161">161</a>                         if (!(flags &amp; <a href="ident?i=LEFT">LEFT</a>))
<a name=L162 href="source/kernel/vsprintf.c#L162">162</a>                                 while (--field_width &gt; 0)
<a name=L163 href="source/kernel/vsprintf.c#L163">163</a>                                         *<a href="ident?i=str">str</a>++ = <i>' '</i>;
<a name=L164 href="source/kernel/vsprintf.c#L164">164</a>                         *<a href="ident?i=str">str</a>++ = (unsigned char) <a href="ident?i=va_arg">va_arg</a>(args, int);
<a name=L165 href="source/kernel/vsprintf.c#L165">165</a>                         while (--field_width &gt; 0)
<a name=L166 href="source/kernel/vsprintf.c#L166">166</a>                                 *<a href="ident?i=str">str</a>++ = <i>' '</i>;
<a name=L167 href="source/kernel/vsprintf.c#L167">167</a>                         break;
<a name=L168 href="source/kernel/vsprintf.c#L168">168</a> 
<a name=L169 href="source/kernel/vsprintf.c#L169">169</a>                 case <i>'s'</i>:
<a name=L170 href="source/kernel/vsprintf.c#L170">170</a>                         s = <a href="ident?i=va_arg">va_arg</a>(args, char *);
<a name=L171 href="source/kernel/vsprintf.c#L171">171</a>                         len = <a href="ident?i=strlen">strlen</a>(s);
<a name=L172 href="source/kernel/vsprintf.c#L172">172</a>                         if (precision &lt; 0)
<a name=L173 href="source/kernel/vsprintf.c#L173">173</a>                                 precision = len;
<a name=L174 href="source/kernel/vsprintf.c#L174">174</a>                         else if (len &gt; precision)
<a name=L175 href="source/kernel/vsprintf.c#L175">175</a>                                 len = precision;
<a name=L176 href="source/kernel/vsprintf.c#L176">176</a> 
<a name=L177 href="source/kernel/vsprintf.c#L177">177</a>                         if (!(flags &amp; <a href="ident?i=LEFT">LEFT</a>))
<a name=L178 href="source/kernel/vsprintf.c#L178">178</a>                                 while (len &lt; field_width--)
<a name=L179 href="source/kernel/vsprintf.c#L179">179</a>                                         *<a href="ident?i=str">str</a>++ = <i>' '</i>;
<a name=L180 href="source/kernel/vsprintf.c#L180">180</a>                         for (i = 0; i &lt; len; ++i)
<a name=L181 href="source/kernel/vsprintf.c#L181">181</a>                                 *<a href="ident?i=str">str</a>++ = *s++;
<a name=L182 href="source/kernel/vsprintf.c#L182">182</a>                         while (len &lt; field_width--)
<a name=L183 href="source/kernel/vsprintf.c#L183">183</a>                                 *<a href="ident?i=str">str</a>++ = <i>' '</i>;
<a name=L184 href="source/kernel/vsprintf.c#L184">184</a>                         break;
<a name=L185 href="source/kernel/vsprintf.c#L185">185</a> 
<a name=L186 href="source/kernel/vsprintf.c#L186">186</a>                 case <i>'o'</i>:
<a name=L187 href="source/kernel/vsprintf.c#L187">187</a>                         <a href="ident?i=str">str</a> = <a href="ident?i=number">number</a>(<a href="ident?i=str">str</a>, <a href="ident?i=va_arg">va_arg</a>(args, unsigned long), 8,
<a name=L188 href="source/kernel/vsprintf.c#L188">188</a>                                 field_width, precision, flags);
<a name=L189 href="source/kernel/vsprintf.c#L189">189</a>                         break;
<a name=L190 href="source/kernel/vsprintf.c#L190">190</a> 
<a name=L191 href="source/kernel/vsprintf.c#L191">191</a>                 case <i>'p'</i>:
<a name=L192 href="source/kernel/vsprintf.c#L192">192</a>                         if (field_width == -1) {
<a name=L193 href="source/kernel/vsprintf.c#L193">193</a>                                 field_width = 8;
<a name=L194 href="source/kernel/vsprintf.c#L194">194</a>                                 flags |= <a href="ident?i=ZEROPAD">ZEROPAD</a>;
<a name=L195 href="source/kernel/vsprintf.c#L195">195</a>                         }
<a name=L196 href="source/kernel/vsprintf.c#L196">196</a>                         <a href="ident?i=str">str</a> = <a href="ident?i=number">number</a>(<a href="ident?i=str">str</a>,
<a name=L197 href="source/kernel/vsprintf.c#L197">197</a>                                 (unsigned long) <a href="ident?i=va_arg">va_arg</a>(args, void *), 16,
<a name=L198 href="source/kernel/vsprintf.c#L198">198</a>                                 field_width, precision, flags);
<a name=L199 href="source/kernel/vsprintf.c#L199">199</a>                         break;
<a name=L200 href="source/kernel/vsprintf.c#L200">200</a> 
<a name=L201 href="source/kernel/vsprintf.c#L201">201</a>                 case <i>'x'</i>:
<a name=L202 href="source/kernel/vsprintf.c#L202">202</a>                         flags |= <a href="ident?i=SMALL">SMALL</a>;
<a name=L203 href="source/kernel/vsprintf.c#L203">203</a>                 case <i>'X'</i>:
<a name=L204 href="source/kernel/vsprintf.c#L204">204</a>                         <a href="ident?i=str">str</a> = <a href="ident?i=number">number</a>(<a href="ident?i=str">str</a>, <a href="ident?i=va_arg">va_arg</a>(args, unsigned long), 16,
<a name=L205 href="source/kernel/vsprintf.c#L205">205</a>                                 field_width, precision, flags);
<a name=L206 href="source/kernel/vsprintf.c#L206">206</a>                         break;
<a name=L207 href="source/kernel/vsprintf.c#L207">207</a> 
<a name=L208 href="source/kernel/vsprintf.c#L208">208</a>                 case <i>'d'</i>:
<a name=L209 href="source/kernel/vsprintf.c#L209">209</a>                 case <i>'i'</i>:
<a name=L210 href="source/kernel/vsprintf.c#L210">210</a>                         flags |= <a href="ident?i=SIGN">SIGN</a>;
<a name=L211 href="source/kernel/vsprintf.c#L211">211</a>                 case <i>'u'</i>:
<a name=L212 href="source/kernel/vsprintf.c#L212">212</a>                         <a href="ident?i=str">str</a> = <a href="ident?i=number">number</a>(<a href="ident?i=str">str</a>, <a href="ident?i=va_arg">va_arg</a>(args, unsigned long), 10,
<a name=L213 href="source/kernel/vsprintf.c#L213">213</a>                                 field_width, precision, flags);
<a name=L214 href="source/kernel/vsprintf.c#L214">214</a>                         break;
<a name=L215 href="source/kernel/vsprintf.c#L215">215</a> 
<a name=L216 href="source/kernel/vsprintf.c#L216">216</a>                 case <i>'n'</i>:
<a name=L217 href="source/kernel/vsprintf.c#L217">217</a>                         ip = <a href="ident?i=va_arg">va_arg</a>(args, int *);
<a name=L218 href="source/kernel/vsprintf.c#L218">218</a>                         *ip = (<a href="ident?i=str">str</a> - <a href="ident?i=buf">buf</a>);
<a name=L219 href="source/kernel/vsprintf.c#L219">219</a>                         break;
<a name=L220 href="source/kernel/vsprintf.c#L220">220</a> 
<a name=L221 href="source/kernel/vsprintf.c#L221">221</a>                 default:
<a name=L222 href="source/kernel/vsprintf.c#L222">222</a>                         if (*fmt != <i>'%'</i>)
<a name=L223 href="source/kernel/vsprintf.c#L223">223</a>                                 *<a href="ident?i=str">str</a>++ = <i>'%'</i>;
<a name=L224 href="source/kernel/vsprintf.c#L224">224</a>                         if (*fmt)
<a name=L225 href="source/kernel/vsprintf.c#L225">225</a>                                 *<a href="ident?i=str">str</a>++ = *fmt;
<a name=L226 href="source/kernel/vsprintf.c#L226">226</a>                         else
<a name=L227 href="source/kernel/vsprintf.c#L227">227</a>                                 --fmt;
<a name=L228 href="source/kernel/vsprintf.c#L228">228</a>                         break;
<a name=L229 href="source/kernel/vsprintf.c#L229">229</a>                 }
<a name=L230 href="source/kernel/vsprintf.c#L230">230</a>         }
<a name=L231 href="source/kernel/vsprintf.c#L231">231</a>         *<a href="ident?i=str">str</a> = <i>'\0'</i>;
<a name=L232 href="source/kernel/vsprintf.c#L232">232</a>         return <a href="ident?i=str">str</a>-<a href="ident?i=buf">buf</a>;
<a name=L233 href="source/kernel/vsprintf.c#L233">233</a> }
<a name=L234 href="source/kernel/vsprintf.c#L234">234</a> </pre><hr>
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