kc3-lang/kc3/pdf/pdf_write.c

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• Hash : 1aed08a3
  Author : Thomas de Grivel
  Date : 2025-09-23T16:56:14
  

  add pdf KC3 subdir to update_sources
  

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• pdf/pdf_write.c

• /* kc3
   * Copyright from 2022 to 2025 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 "../libkc3/kc3.h"
  #include "../libkc3/kc3_main.h"
  #include "pdf_write.h"
  
  sw pdf_buf_write_tag (s_buf *buf, const s_tag *src)
  {
    assert(buf);
    assert(src);
    switch (src->type) {
      case TAG_F32:  return pdf_buf_write_float(buf, src->data.f32);
      case TAG_F64:  return pdf_buf_write_float(buf, src->data.f64);
      case TAG_F128: return pdf_buf_write_float(buf, src->data.f128);
      case TAG_SW:   return pdf_buf_write_integer(buf, src->data.sw);
      case TAG_S64:  return pdf_buf_write_integer(buf, src->data.s64);
      case TAG_S32:  return pdf_buf_write_integer(buf, src->data.s32);
      case TAG_S16:  return pdf_buf_write_integer(buf, src->data.s16);
      case TAG_S8:   return pdf_buf_write_integer(buf, src->data.s8);
      case TAG_U8:   return pdf_buf_write_integer(buf, src->data.u8);
      case TAG_U16:  return pdf_buf_write_integer(buf, src->data.u16);
      case TAG_U32:  return pdf_buf_write_integer(buf, src->data.u32);
      case TAG_U64:  return pdf_buf_write_integer(buf, src->data.u64);
      case TAG_UW:   return pdf_buf_write_integer(buf, src->data.uw);
      case TAG_MAP:
        return pdf_buf_write_dictionnary(buf, &src->data.map);
      case TAG_STR:  return pdf_buf_write_string_hex(buf, &src->data.str);
      case TAG_PSYM: return pdf_buf_write_name(buf, src->data.psym);
      default:
        err_write_1("pdf_buf_write_tag: invalid PDF tag type: ");
        err_puts(tag_type_to_string(src->type));
        assert(! "pdf_buf_write_tag: invalid PDF tag type");
        return -1;
    }
    err_puts("pdf_buf_write_tag: unknown tag type");
    assert(! "pdf_buf_write_tag: unknown tag type");
    return -1;
  }
  
  sw pdf_buf_write_bool (s_buf *buf, bool src)
  {
    if (src) {
      return pdf_buf_write_token(buf, "true");
    }
    return pdf_buf_write_token(buf, "false");
  }
  
  sw pdf_buf_write_dictionnary (s_buf *buf, const s_map *src)
  {
    uw i;
    sw r;
    sw result = 0;
    if ((r = pdf_buf_write_token(buf, "<<")) < 0) {
      return r;
    }
    result += r;
    for (i = 0; i < src->count; i++) {
      if (src->key[i].type != TAG_PSYM) {
        err_puts("pdf_buf_write_dictionary: key must be psym");
        assert(! "pdf_buf_write_dictionary: key must be psym");
        return -1;
      }
      if ((r = pdf_buf_write_name(buf, src->key[i].data.psym)) < 0)
        return r;
      result += r;
      if ((r = pdf_buf_write_token(buf, " ")) < 0)
        return r;
      result += r;
      if ((r = pdf_buf_write_tag(buf, &src->value[i])) < 0)
        return r;
      result += r;
      if ((r = pdf_buf_write_token(buf, " ")) < 0)
        return r;
    }
    if ((r = pdf_buf_write_token(buf, ">>")) < 0) {
      return r;
    }
    result += r;
    return result;
  }
  
  sw pdf_buf_write_float (s_buf *buf, f32 src)
  {
    assert(buf);
    return buf_inspect_f32(buf, src);
  }
  
  sw pdf_buf_write_integer (s_buf *buf, s32 src)
  {
    assert(buf);
    return buf_inspect_s32(buf, src);
  }
  
  sw pdf_buf_write_name (s_buf *buf, p_pdf_name src)
  {
    sw r = 0;
    if ((r = buf_write_u8(buf, '/')) < 0
      || (r = buf_write_str(buf, &src->str)) < 0) {
      return r;
    }
    return r;
  }
  
  sw pdf_buf_write_null (s_buf *buf)
  {
      return pdf_buf_write_token(buf, "null");
  }
  
  sw pdf_buf_write_string_hex (s_buf *buf, const s_str *dest)
  {
    u8 c;
    sw i;
    sw r = 0;
    s_buf read_buf = {0};
    const char *base = g_kc3_base_hexadecimal.ptr.pchar;
    buf_init_str_const(&read_buf, dest);
  
    if ((r = pdf_buf_write_token(buf, "<")) < 0) {
      goto cleanup;
    }
    for (i = 0; i < dest->size; i++) {
      if ((r = buf_read_u8(&read_buf, &c)) < 0
        || (r = buf_write_u8(buf, base[c & 0xf])) < 0
        || (r = buf_write_u8(buf, base[(c >> 4) & 0xf])) < 0) {
        goto cleanup;
      }
    }
    if ((r = pdf_buf_write_token(buf, ">")) < 0) {
      goto cleanup;
    }
   cleanup:
    buf_clean(&read_buf);
    return r;
  }
  
  // writes token without separators
  sw pdf_buf_write_token(s_buf *buf, const char *pchar)
  {
    return buf_write_1(buf, pchar);
  }
  

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