A better solution is a two-pass scan of the buffer: the first pass simply computes the length of the new buffer, after which we allocate the memory and copy the data with the required replacements.
一个更好的解决办法是对内存区的两段扫描：第一段只是计算新内存区的长度，随后我们分配内存和拷贝带有需要的替换的数据。
A better solution is a two-pass scan of the buffer: the first pass simply computes the length of the new buffer, after which we allocate the memory and copy the data with the required replacements.
一个更好的解决办法是对内存区的两段扫描：第一段只是计算新内存区的长度，随后我们分配内存和拷贝带有需要的替换的数据。
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