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Fixed-width strings: Difference between revisions
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We need to discuss whether strings should be 0-terminated. Processing a string buffer with C/C++ routines would be much easier if it did. Also, in debug mode, the display of a string is easier. | We need to discuss whether strings should be 0-terminated. Processing a string buffer with C/C++ routines would be much easier if it did. Also, in debug mode, the display of a string is easier. | ||
''Question: can we use bit fields, or better masks plus shift for the compacted values?'' | |||
class String ... { | class String ... { | ||
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struct { | struct { | ||
unsigned int width:2; // 0:1, 1:2, 2:not used, 3:4 | unsigned int width:2; // 0:1, 1:2, 2:not used, 3:4 | ||
unsigned int tag: | unsigned int tag:2; // data tag: 0:direct, 1:regular, 2:concat, 3:substr | ||
unsigned int dynamic:1; // if nonzero, buffer must be deleted | |||
unsigned int treeDepth:x; // to be defined (more fields may follow) | unsigned int treeDepth:x; // to be defined (more fields may follow) | ||
unsigned int padding:y; // padding to 32 bits | unsigned int padding:y; // padding to 32 bits | ||