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CODE128: Add minimal encodation algorithm (non-extended ASCII only)

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from ZXing (props Alex Geller) - about 25-60% slower depending on
  data & stack heavy but does improve some outcomes when FNC1s
  present (GS1_MODE or manual) although not much else it appears
  (the previous algorithm was very good), but has a logical clarity
  the other lacked - funcs `c128_dxsmooth()` etc shared with
  CODE16K now moved there and renamed as `c16k_`;
  also fix extended char latching when exactly 4 extended chars
  at end
  also manual code set switching now honoured exactly even if
  immediate shift required;
manual: make explicit that AI "(00)" and "(01)" prefixes added by
  Zint are HRT-only
general: add `extern "C"` wrappers to a few header files
This commit is contained in:
gitlost
2024-09-07 12:44:16 +01:00
parent 10747d6385
commit 93c3e27fba
23 changed files with 1017 additions and 958 deletions
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6
backend/common.c
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@@ -185,6 +185,7 @@ INTERNAL int bin_append_posn(const int arg, const int length, char *binary, cons
}
#ifndef Z_COMMON_INLINE
/* Returns true (1) if a module is dark/black, otherwise false (0) */
INTERNAL int module_is_set(const struct zint_symbol *symbol, const int y_coord, const int x_coord) {
return (symbol->encoded_data[y_coord][x_coord >> 3] >> (x_coord & 0x07)) & 1;
@@ -209,7 +210,8 @@ INTERNAL void set_module_colour(struct zint_symbol *symbol, const int y_coord, c
INTERNAL void unset_module(struct zint_symbol *symbol, const int y_coord, const int x_coord) {
symbol->encoded_data[y_coord][x_coord >> 3] &= ~(1 << (x_coord & 0x07));
}
#endif
#endif /* Z_COMMON_INLINE */
/* Expands from a width pattern to a bit pattern */
INTERNAL void expand(struct zint_symbol *symbol, const char data[], const int length) {
@@ -662,6 +664,6 @@ INTERNAL void debug_test_codeword_dump_int(struct zint_symbol *symbol, const int
#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ >= 7
#pragma GCC diagnostic pop
#endif
#endif /*ZINT_TEST*/
#endif /* ZINT_TEST */
/* vim: set ts=4 sw=4 et : */