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| author | Cyrille Bagard <nocbos@gmail.com> | 2023-10-09 22:49:59 (GMT) |
|---|---|---|
| committer | Cyrille Bagard <nocbos@gmail.com> | 2023-10-09 22:49:59 (GMT) |
| commit | 7c6fe94c90d320813d0d78a9dbef707696f31505 (patch) | |
| tree | 912b5c51469c02e6ef680c0c60739787ccff4891 /src/arch | |
| parent | cb05b99a8c451ff80d88f988e2654c794b0f3750 (diff) | |
Support some last missing features from Kaitai: bit fields, instance search order and stream EOF.
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/vmpa.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/arch/vmpa.h b/src/arch/vmpa.h index f353ebd..4f35ebe 100644 --- a/src/arch/vmpa.h +++ b/src/arch/vmpa.h @@ -156,6 +156,62 @@ bool store_vmpa(const vmpa2t *, const char *, bound_value **, size_t *); +/* ------------------------ DEFINITION DE POSITION AVEC BITS ------------------------ */ + + +/* Adresse mémoire ou position physique */ +typedef struct _ext_vmpa_t +{ + vmpa2t base; /* Vision macroscopique */ + + uint8_t consumed_extra_bits; /* Avancée supplémentaire */ + +} ext_vmpa_t; + + +#define init_evmpa_from_vmpa(d, s) \ + do \ + { \ + copy_vmpa(&(d)->base, (s)); \ + (d)->consumed_extra_bits = 0; \ + } \ + while (0) + +#define copy_evmpa(d, s) \ + do \ + { \ + copy_vmpa(&(d)->base, &(s)->base); \ + (d)->consumed_extra_bits = (s)->consumed_extra_bits; \ + } \ + while (0) + +#define advance_evmpa_bits(a, q) \ + do \ + { \ + uint8_t __sum; \ + __sum = (a)->consumed_extra_bits + q; \ + if (__sum > 8) \ + { \ + advance_vmpa(&(a)->base, __sum / 8); \ + (a)->consumed_extra_bits = __sum % 8; \ + } \ + else \ + (a)->consumed_extra_bits = __sum; \ + } \ + while (0) + +#define align_evmpa_on_byte(a) \ + do \ + { \ + if ((a)->consumed_extra_bits > 0) \ + { \ + advance_vmpa(&(a)->base, 1); \ + (a)->consumed_extra_bits = 0; \ + } \ + } \ + while (0); + + /* ------------------------ AIDES FONCTIONNELLES AUXILIAIRES ------------------------ */ |