kc3-lang/kc3/libc3/tag_neg.c

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• Hash : 7f2f72e4
  Author : Thomas de Grivel
  Date : 2024-03-04T14:19:12
  

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• libc3/tag_neg.c

• /* c3
   * Copyright 2022-2024 kmx.io <contact@kmx.io>
   *
   * Permission is hereby granted to use this software granted the above
   * copyright notice and this permission paragraph are included in all
   * copies and substantial portions of this software.
   *
   * THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
   * PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
   * AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
   * THIS SOFTWARE.
   */
  #include "assert.h"
  #include "integer.h"
  #include "ratio.h"
  #include "tag.h"
  
  s_tag * tag_neg (const s_tag *tag, s_tag *result)
  {
    s_integer tmp;
    switch (tag->type) {
    case TAG_INTEGER:
      result->type = TAG_INTEGER;
      integer_neg(&tag->data.integer, &result->data.integer);
      return result;
    case TAG_RATIO:
      result->type = TAG_RATIO;
      ratio_neg(&tag->data.ratio, &result->data.ratio);
      return result;
    case TAG_SW:
      if (tag->data.sw == SW_MIN) {
        integer_init_sw(&tmp, tag->data.sw);
        result->type = TAG_INTEGER;
        integer_neg(&tmp, &result->data.integer);
        integer_clean(&tmp);
        return result;
      }
      return tag_init_sw(result, -tag->data.sw);
    case TAG_S64:
      if (tag->data.s64 == S64_MIN) {
        integer_init_s64(&tmp, tag->data.s64);
        result->type = TAG_INTEGER;
        integer_neg(&tmp, &result->data.integer);
        integer_clean(&tmp);
        return result;
      }
      return tag_init_s64(result, -tag->data.s64);
    case TAG_S32:
      return tag_init_s64(result, - (s64) tag->data.s32);
    case TAG_S16:
      return tag_init_s32(result, - (s32) tag->data.s16);
    case TAG_S8:
      return tag_init_s16(result, - (s16) tag->data.s8);
    case TAG_U8:
      return tag_init_s16(result, - (s16) tag->data.u8);
    case TAG_U16:
      return tag_init_s32(result, - (s32) tag->data.u16);
    case TAG_U32:
      return tag_init_s64(result, - (s64) tag->data.u32);
    case TAG_U64:
      integer_init_u64(&tmp, tag->data.u64);
      result->type = TAG_INTEGER;
      integer_neg(&tmp, &result->data.integer);
      integer_clean(&tmp);
      return result;
    case TAG_UW:
      integer_init_uw(&tmp, tag->data.uw);
      result->type = TAG_INTEGER;
      integer_neg(&tmp, &result->data.integer);
      integer_clean(&tmp);
      return result;
    default:
      err_write_1("tag_neg: invalid tag type: ");
      err_puts(tag_type_to_string(tag->type));
    }
    return NULL;
  }
  

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