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Fail to compile if CHAR_BIT != 8 #667

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Merged
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Jun 3, 2020
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Fail to compile if CHAR_BIT != 8 #667

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6 changes: 6 additions & 0 deletions c/tskit/core.h
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,7 @@ extern "C" {
#endif

#include <stdbool.h>
#include <limits.h>

#ifdef __GNUC__
#define TSK_WARN_UNUSED __attribute__((warn_unused_result))
Expand All @@ -46,6 +47,11 @@ extern "C" {
#define restrict
#endif

/* We assume CHAR_BIT == 8 when loading strings from 8-bit byte arrays */
#if CHAR_BIT != 8
#error CHAR_BIT MUST EQUAL 8
#endif

/* This sets up TSK_DBL_DECIMAL_DIG, which can then be used as a
* precision specifier when writing out doubles, if you want sufficient
* decimal digits to be written to guarantee a lossless round-trip
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