Added precision and variable precision #11
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added 7 commits
November 28, 2015 11:27
This makes the printf.c and sprintf.c files easier to diff.
One of the sprintf.c test cases is failing, which needs to be resolved.
All features of precision should work, except that numbers get limited to 10 or 20 characters for precision (depending on if LONG is supported). This seemed like a reasonable complexity trade-off, since it would allow precision-based zero padding to the maximum character width of the largest integer type.
This standard format string feature allows the width or precision to be provided as an additional argument.
As a side effect, integer precision is no longer bounded by BF_MAX. Precision should now be fully compatible with the standard printf.
If zero padding is specified when either left-justify or precision are used, the zero padding should be ignored. The '*' specifiers can be integers, where negatives are handled in specific ways. The prec_used flag is no longer needed with these changes.
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The tests were also cleaned up (and expanded for precision).