/src/w3m/libwc/utf7.c

Source
#ifdef USE_UNICODE

#include "wc.h"
#include "ucs.h"
#include "utf7.h"
#include "wtf.h"

#define SD WC_UTF7_MAP_SET_D
#define SO WC_UTF7_MAP_SET_O
#define SB WC_UTF7_MAP_SET_B
#define BB WC_UTF7_MAP_BASE64
#define BP WC_UTF7_MAP_PLUS
#define BM WC_UTF7_MAP_MINUS
#define CD (WC_UTF7_MAP_SET_D | WC_UTF7_MAP_C0)
#define CB (WC_UTF7_MAP_SET_B | WC_UTF7_MAP_C0)
#define C1 WC_UTF7_MAP_C1

wc_uint8 WC_UTF7_MAP[ 0x100 ] = {
/*                                       TAB NL          CR          */
    CB, CB, CB, CB, CB, CB, CB, CB,  CB, CD, CD, CB, CB, CD, CB, CB,
/*                                                                  */
    CB, CB, CB, CB, CB, CB, CB, CB,  CB, CB, CB, CB, CB, CB, CB, CB,
/*  SP  !   "   #   $   %   &   '    (   )   *   +   ,   -   .   /   */
    SD, SO, SO, SO, SO, SO, SO, SD,  SD, SD, SO, BP, SD, BM, SD, BB,
/*  0   1   2   3   4   5   6   7    8   9   :   ;   <   =   >   ?   */
    BB, BB, BB, BB, BB, BB, BB, BB,  BB, BB, SD, SO, SO, SO, SO, SD,
/*  @   A   B   C   D   E   F   G    H   I   J   K   L   M   N   O   */
    BB, BB, BB, BB, BB, BB, BB, BB,  BB, BB, BB, BB, BB, BB, BB, BB, 
/*  P   Q   R   S   T   U   V   W    X   Y   Z   [   \   ]   ^   _   */
    BB, BB, BB, BB, BB, BB, BB, BB,  BB, BB, BB, SO, SB, SO, SO, SO, 
/*  `   a   b   c   d   e   f   g    h   i   j   k   l   m   n   o   */
    SO, BB, BB, BB, BB, BB, BB, BB,  BB, BB, BB, BB, BB, BB, BB, BB, 
/*  p   q   r   s   t   u   v   w    x   y   z   {   |   }   ~   DEL */
    BB, BB, BB, BB, BB, BB, BB, BB,  BB, BB, BB, SO, SO, SO, SB, CB, 

    C1, C1, C1, C1, C1, C1, C1, C1,  C1, C1, C1, C1, C1, C1, C1, C1,
    C1, C1, C1, C1, C1, C1, C1, C1,  C1, C1, C1, C1, C1, C1, C1, C1,
    C1, C1, C1, C1, C1, C1, C1, C1,  C1, C1, C1, C1, C1, C1, C1, C1,
    C1, C1, C1, C1, C1, C1, C1, C1,  C1, C1, C1, C1, C1, C1, C1, C1,
    C1, C1, C1, C1, C1, C1, C1, C1,  C1, C1, C1, C1, C1, C1, C1, C1,
    C1, C1, C1, C1, C1, C1, C1, C1,  C1, C1, C1, C1, C1, C1, C1, C1,
    C1, C1, C1, C1, C1, C1, C1, C1,  C1, C1, C1, C1, C1, C1, C1, C1,
    C1, C1, C1, C1, C1, C1, C1, C1,  C1, C1, C1, C1, C1, C1, C1, C1,
};

static char c_base64_map[ 0x60 ] = {
    -1, -1, -1, -1, -1, -1, -1, -1,  -1, -1, -1, 62, -1, -1, -1, 63,
    52, 53, 54, 55, 56, 57, 58, 59,  60, 61, -1, -1, -1, -1, -1, -1,
    -1,  0,  1,  2,  3,  4,  5,  6,   7,  8,  9, 10, 11, 12, 13, 14,
    15, 16, 17, 18, 19, 20, 21, 22,  23, 24, 25, -1, -1, -1, -1, -1,
    -1, 26, 27, 28, 29, 30, 31, 32,  33, 34, 35, 36, 37, 38, 39, 40,
    41, 42, 43, 44, 45, 46, 47, 48,  49, 50, 51, -1, -1, -1, -1, -1,
};

static char base64_c_map[] =
    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

#define BASE64_C(x) base64_c_map[(x)]
#define C_BASE64(x) c_base64_map[(x) - 0x20]

Str
wc_conv_from_utf7(Str is, wc_ces ces)
{
    Str os;
    wc_uchar *sp = (wc_uchar *)is->ptr;
    wc_uchar *ep = sp + is->length;
    wc_uchar *p;
    int state = WC_UTF7_NOSTATE;
    wc_uint32 b, high = 0;
    wc_status st;

    for (p = sp; p < ep && *p < 0x80 && *p != WC_C_UTF7_PLUS; p++)
  ;
    if (p == ep)
  return is;
    os = Strnew_size(is->length + is->length / 3);
    if (p > sp)
  Strcat_charp_n(os, is->ptr, (int)(p - sp));

    st.tag = NULL;
    st.ntag = 0;
    for (; p < ep; p++) {
  switch (state) {
  case WC_UTF7_NOSTATE:
      if (*p == WC_C_UTF7_PLUS) {
    state = WC_UTF7_PLUS;
    st.shift = 16;
    st.base = 0;
    high = 0;
    continue;
      }
      break;
  case WC_UTF7_PLUS:
      if (*p == WC_C_UTF7_MINUS)
    wtf_push_ucs(os, (wc_uint32)WC_C_UTF7_PLUS, &st);
  case WC_UTF7_BASE64:
      switch (WC_UTF7_MAP[*p]) {
      case BB: /* [A-Za-z0-9/] */
      case BP: /* '+' */
    b = C_BASE64(*p);
    st.shift -= 6;
    if (st.shift <= 0) {
        st.base |= b >> (- st.shift);
        if (st.base >= WC_C_UCS2_SURROGATE &&
      st.base < WC_C_UCS2_SURROGATE_LOW) {
      if (! high)
          high = st.base;
      else
          high = 0; /* error */
        } else if (st.base >= WC_C_UCS2_SURROGATE_LOW &&
      st.base <= WC_C_UCS2_SURROGATE_END) {
      if (high)
          wtf_push_ucs(os, wc_utf16_to_ucs(high, st.base), &st);
      /* else; */ /* error */
      high = 0;
        } else if (st.base != WC_C_UCS2_BOM)
      wtf_push_ucs(os, st.base, &st);
        st.shift += 16;
        st.base = 0;
    }
    st.base |= (b << st.shift) & 0xffff;
    state = WC_UTF7_BASE64;
    continue;
      case BM: /* '-' */
    state = WC_UTF7_NOSTATE;
    continue;
      }
  }
  switch (WC_UTF7_MAP[*p]) {
  case CD:
  case CB:
      Strcat_char(os, (char)*p);
      break;
  case C1:
      wtf_push_unknown(os, p, 1);
      break;
  default:
      wtf_push_ucs(os, (wc_uint32)*p, &st);
      break;
  }
    }
    return os;
}

static void
wc_push_ucs_to_utf7(Str os, wc_uint32 ucs, wc_status *st)
{
    if (ucs > WC_C_UNICODE_END)
  return;
    if (ucs > WC_C_UCS2_END) {
  ucs = wc_ucs_to_utf16(ucs);
  wc_push_ucs_to_utf7(os, ucs >> 16, st);
  wc_push_ucs_to_utf7(os, ucs & 0xffff, st);
  return;
    }
    if (ucs < 0x80) {
  switch (WC_UTF7_MAP[ucs]) {
  case BB:
  case BM:
  case SD:
  case CD:
      if (st->state == WC_UTF7_BASE64) {
    Strcat_char(os, BASE64_C(st->base));
    Strcat_char(os, WC_C_UTF7_MINUS);
    st->state = WC_UTF7_NOSTATE;
      }
      Strcat_char(os, (char)ucs);
      return;
  case BP:
      if (st->state == WC_UTF7_BASE64) {
    Strcat_char(os, BASE64_C(st->base));
    Strcat_char(os, WC_C_UTF7_MINUS);
    st->state = WC_UTF7_NOSTATE;
      }
      Strcat_char(os, WC_C_UTF7_PLUS);
      Strcat_char(os, WC_C_UTF7_MINUS);
      return;
  }
    }
    if (st->state == WC_UTF7_BASE64 && st->shift) {
  st->shift += 16;
  st->base |= ucs >> st->shift;
  Strcat_char(os, BASE64_C(st->base));
    } else {
  if (st->state != WC_UTF7_BASE64) {
      Strcat_char(os, WC_C_UTF7_PLUS);
      st->state = WC_UTF7_BASE64;
  }
  st->shift = 16;
  st->base = 0;
    }
    st->shift -= 6;
    Strcat_char(os, BASE64_C((ucs >> st->shift) & 0x3f));
    st->shift -= 6;
    Strcat_char(os, BASE64_C((ucs >> st->shift) & 0x3f));
    if (st->shift) {
  st->shift -= 6;
  st->base = (ucs << (- st->shift)) & 0x3f;
    }
    return;
}

static int
wc_push_tag_to_utf7(Str os, int ntag, wc_status *st)
{
    char *p;

    if (ntag) {
  p = wc_ucs_get_tag(ntag);
  if (p == NULL)
      ntag = 0;
    }
    if (ntag) {
  wc_push_ucs_to_utf7(os, WC_C_LANGUAGE_TAG, st);
  for (; *p; p++)
      wc_push_ucs_to_utf7(os, WC_C_LANGUAGE_TAG0 | *p, st);
    } else
  wc_push_ucs_to_utf7(os, WC_C_CANCEL_TAG, st);
    return ntag;
}

void
wc_push_to_utf7(Str os, wc_wchar_t cc, wc_status *st)
{
    char *p;

  while (1) {
    switch (WC_CCS_SET(cc.ccs)) {
    case WC_CCS_UCS4:
  if (cc.code > WC_C_UNICODE_END) {
      cc.ccs = WC_CCS_IS_WIDE(cc.ccs) ? WC_CCS_UNKNOWN_W : WC_CCS_UNKNOWN;
      continue;
  }
    case WC_CCS_US_ASCII:
    case WC_CCS_UCS2:
  if (st->ntag)
      st->ntag = wc_push_tag_to_utf7(os, 0, st);
  wc_push_ucs_to_utf7(os, cc.code, st);
  return;
    case WC_CCS_UCS_TAG:
  if (WcOption.use_language_tag && wc_ucs_tag_to_tag(cc.code) != st->ntag)
      st->ntag = wc_push_tag_to_utf7(os, wc_ucs_tag_to_tag(cc.code), st);
  wc_push_ucs_to_utf7(os, wc_ucs_tag_to_ucs(cc.code), st);
  return;
    case WC_CCS_ISO_8859_1:
  if (st->ntag)
      st->ntag = wc_push_tag_to_utf7(os, 0, st);
  wc_push_ucs_to_utf7(os, cc.code | 0x80, st);
  return;
    case WC_CCS_UNKNOWN_W:
  if (!WcOption.no_replace) {
      if (st->ntag)
          st->ntag = wc_push_tag_to_utf7(os, 0, st);
      for (p = WC_REPLACE_W; *p; p++)
    wc_push_ucs_to_utf7(os, (wc_uint32)*p, st);
  }
  return;
    case WC_CCS_UNKNOWN:
  if (!WcOption.no_replace) {
      if (st->ntag)
          st->ntag = wc_push_tag_to_utf7(os, 0, st);
      for (p = WC_REPLACE; *p; p++)
    wc_push_ucs_to_utf7(os, (wc_uint32)*p, st);
  }
  return;
    default:
  if (WcOption.ucs_conv &&
    (cc.code = wc_any_to_ucs(cc)) != WC_C_UCS4_ERROR)
      cc.ccs = WC_CCS_UCS2;
  else
      cc.ccs = WC_CCS_IS_WIDE(cc.ccs) ? WC_CCS_UNKNOWN_W : WC_CCS_UNKNOWN;
  continue;
    }
  }
}

void
wc_push_to_utf7_end(Str os, wc_status *st)
{
    if (st->ntag)
  st->ntag = wc_push_tag_to_utf7(os, 0, st);
    if (st->state == WC_UTF7_BASE64) {
  if (st->shift)
      Strcat_char(os, BASE64_C(st->base));
  Strcat_char(os, WC_C_UTF7_MINUS);
    }
    return;
}

Str
wc_char_conv_from_utf7(wc_uchar c, wc_status *st)
{
    static Str os;
    static wc_uint32 high;
    wc_uint32 b;

    if (st->state == -1) {
  st->state = WC_UTF7_NOSTATE;
  os = Strnew_size(8);
    }

    switch (st->state) {
    case WC_UTF7_NOSTATE:
  if (c == WC_C_UTF7_PLUS) {
      st->state = WC_UTF7_PLUS;
      st->shift = 16;
      st->base = 0;
      high = 0;
      return NULL;
  }
  break;
    case WC_UTF7_PLUS:
  if (c == WC_C_UTF7_MINUS) {
      wtf_push_ucs(os, (wc_uint32)WC_C_UTF7_PLUS, st);
      st->state = -1;
      return os;
  }
    case WC_UTF7_BASE64:
  switch (WC_UTF7_MAP[c]) {
  case BB: /* [A-Za-z0-9/] */
  case BP: /* '+' */
      b = C_BASE64(c);
      st->shift -= 6;
      if (st->shift <= 0) {
    st->base |= b >> (- st->shift);
    if (st->base >= WC_C_UCS2_SURROGATE &&
        st->base < WC_C_UCS2_SURROGATE_LOW) {
        if (! high)
      high = st->base;
        else
      high = 0; /* error */
    } else if (st->base >= WC_C_UCS2_SURROGATE_LOW &&
        st->base <= WC_C_UCS2_SURROGATE_END) {
        if (high)
      wtf_push_ucs(os, wc_utf16_to_ucs(high, st->base), st);
        /* else; */   /* error */
        high = 0;
    } else if (st->base != WC_C_UCS2_BOM)
        wtf_push_ucs(os, st->base, st);
    st->shift += 16;
    st->base = 0;
      }
      st->base |= (b << st->shift) & 0xffff;
      st->state = WC_UTF7_BASE64;
      return os;
  case BM: /* '-' */
      st->state = -1;
      return NULL;
  }
    }
    switch (WC_UTF7_MAP[c]) {
    case CD:
    case CB:
  Strcat_char(os, (char)c);
  break;
    case C1:
  break;
    default:
  wtf_push_ucs(os, (wc_uint32)c, st);
  break;
    }
    st->state = -1;
    return os;
}

#endif



Coverage Report

Created: 2026-01-10 06:48

Line	Count	Source
1		#ifdef USE_UNICODE
2
3		#include "wc.h"
4		#include "ucs.h"
5		#include "utf7.h"
6		#include "wtf.h"
7
8	35.2M	#define SD WC_UTF7_MAP_SET_D
9		#define SO WC_UTF7_MAP_SET_O
10		#define SB WC_UTF7_MAP_SET_B
11	17.4M	#define BB WC_UTF7_MAP_BASE64
12	1.72M	#define BP WC_UTF7_MAP_PLUS
13	17.2M	#define BM WC_UTF7_MAP_MINUS
14	35.2M	#define CD (WC_UTF7_MAP_SET_D \| WC_UTF7_MAP_C0)
15	958k	#define CB (WC_UTF7_MAP_SET_B \| WC_UTF7_MAP_C0)
16	689k	#define C1 WC_UTF7_MAP_C1
17
18		wc_uint8 WC_UTF7_MAP[ 0x100 ] = {
19		/* TAB NL CR */
20		CB, CB, CB, CB, CB, CB, CB, CB, CB, CD, CD, CB, CB, CD, CB, CB,
21		/* */
22		CB, CB, CB, CB, CB, CB, CB, CB, CB, CB, CB, CB, CB, CB, CB, CB,
23		/* SP ! " # $ % & ' ( ) * + , - . / */
24		SD, SO, SO, SO, SO, SO, SO, SD, SD, SD, SO, BP, SD, BM, SD, BB,
25		/* 0 1 2 3 4 5 6 7 8 9 : ; < = > ? */
26		BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, SD, SO, SO, SO, SO, SD,
27		/* @ A B C D E F G H I J K L M N O */
28		BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, BB,
29		/* P Q R S T U V W X Y Z [ \ ] ^ _ */
30		BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, SO, SB, SO, SO, SO,
31		/* ` a b c d e f g h i j k l m n o */
32		SO, BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, BB,
33		/* p q r s t u v w x y z { \| } ~ DEL */
34		BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, BB, SO, SO, SO, SB, CB,
35
36		C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
37		C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
38		C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
39		C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
40		C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
41		C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
42		C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
43		C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1, C1,
44		};
45
46		static char c_base64_map[ 0x60 ] = {
47		-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
48		52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
49		-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
50		15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
51		-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
52		41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
53		};
54
55		static char base64_c_map[] =
56		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
57
58		#define BASE64_C(x) base64_c_map[(x)]
59	225k	#define C_BASE64(x) c_base64_map[(x) - 0x20]
60
61		Str
62		wc_conv_from_utf7(Str is, wc_ces ces)
63	284	{
64	284	Str os;
65	284	wc_uchar sp = (wc_uchar )is->ptr;
66	284	wc_uchar *ep = sp + is->length;
67	284	wc_uchar *p;
68	284	int state = WC_UTF7_NOSTATE;
69	284	wc_uint32 b, high = 0;
70	284	wc_status st;
71
72	719	for (p = sp; p < ep && p < 0x80 && p != WC_C_UTF7_PLUS; p++)
73	435	;
74	284	if (p == ep)
75	16	return is;
76	268	os = Strnew_size(is->length + is->length / 3);
77	268	if (p > sp)
78	33	Strcat_charp_n(os, is->ptr, (int)(p - sp));
79
80	268	st.tag = NULL;
81	268	st.ntag = 0;
82	3.01M	for (; p < ep; p++) {
83	3.01M	switch (state) {
84	944k	case WC_UTF7_NOSTATE:
85	944k	if (*p == WC_C_UTF7_PLUS) {
86	2.81k	state = WC_UTF7_PLUS;
87	2.81k	st.shift = 16;
88	2.81k	st.base = 0;
89	2.81k	high = 0;
90	2.81k	continue;
91	2.81k	}
92	941k	break;
93	941k	case WC_UTF7_PLUS:
94	8.30k	if (*p == WC_C_UTF7_MINUS)
95	238	wtf_push_ucs(os, (wc_uint32)WC_C_UTF7_PLUS, &st);
96	2.07M	case WC_UTF7_BASE64:
97	2.07M	switch (WC_UTF7_MAP[*p]) {
98	191k	case BB: /* [A-Za-z0-9/] */
99	225k	case BP: /* '+' */
100	225k	b = C_BASE64(*p);
101	225k	st.shift -= 6;
102	225k	if (st.shift <= 0) {
103	83.5k	st.base \|= b >> (- st.shift);
104	83.5k	if (st.base >= WC_C_UCS2_SURROGATE &&
105	21.4k	st.base < WC_C_UCS2_SURROGATE_LOW) {
106	1.72k	if (! high)
107	1.41k	high = st.base;
108	311	else
109	311	high = 0; /* error */
110	81.7k	} else if (st.base >= WC_C_UCS2_SURROGATE_LOW &&
111	19.6k	st.base <= WC_C_UCS2_SURROGATE_END) {
112	1.84k	if (high)
113	667	wtf_push_ucs(os, wc_utf16_to_ucs(high, st.base), &st);
114		/* else; / / error */
115	1.84k	high = 0;
116	79.9k	} else if (st.base != WC_C_UCS2_BOM)
117	79.7k	wtf_push_ucs(os, st.base, &st);
118	83.5k	st.shift += 16;
119	83.5k	st.base = 0;
120	83.5k	}
121	225k	st.base \|= (b << st.shift) & 0xffff;
122	225k	state = WC_UTF7_BASE64;
123	225k	continue;
124	2.62k	case BM: /* '-' */
125	2.62k	state = WC_UTF7_NOSTATE;
126	2.62k	continue;
127	2.07M	}
128	3.01M	}
129	2.78M	switch (WC_UTF7_MAP[*p]) {
130	11.9k	case CD:
131	958k	case CB:
132	958k	Strcat_char(os, (char)*p);
133	958k	break;
134	689k	case C1:
135	689k	wtf_push_unknown(os, p, 1);
136	689k	break;
137	1.13M	default:
138	1.13M	wtf_push_ucs(os, (wc_uint32)*p, &st);
139	1.13M	break;
140	2.78M	}
141	2.78M	}
142	268	return os;
143	268	}
144
145		static void
146		wc_push_ucs_to_utf7(Str os, wc_uint32 ucs, wc_status *st)
147	1.05G	{
148	1.05G	if (ucs > WC_C_UNICODE_END)
149	1.22k	return;
150	1.05G	if (ucs > WC_C_UCS2_END) {
151	337M	ucs = wc_ucs_to_utf16(ucs);
152	337M	wc_push_ucs_to_utf7(os, ucs >> 16, st);
153	337M	wc_push_ucs_to_utf7(os, ucs & 0xffff, st);
154	337M	return;
155	337M	}
156	716M	if (ucs < 0x80) {
157	40.3M	switch (WC_UTF7_MAP[ucs]) {
158	17.2M	case BB:
159	17.2M	case BM:
160	35.2M	case SD:
161	35.2M	case CD:
162	35.2M	if (st->state == WC_UTF7_BASE64) {
163	31.9M	Strcat_char(os, BASE64_C(st->base));
164	31.9M	Strcat_char(os, WC_C_UTF7_MINUS);
165	31.9M	st->state = WC_UTF7_NOSTATE;
166	31.9M	}
167	35.2M	Strcat_char(os, (char)ucs);
168	35.2M	return;
169	1.50M	case BP:
170	1.50M	if (st->state == WC_UTF7_BASE64) {
171	1.38M	Strcat_char(os, BASE64_C(st->base));
172	1.38M	Strcat_char(os, WC_C_UTF7_MINUS);
173	1.38M	st->state = WC_UTF7_NOSTATE;
174	1.38M	}
175	1.50M	Strcat_char(os, WC_C_UTF7_PLUS);
176	1.50M	Strcat_char(os, WC_C_UTF7_MINUS);
177	1.50M	return;
178	40.3M	}
179	40.3M	}
180	679M	if (st->state == WC_UTF7_BASE64 && st->shift) {
181	446M	st->shift += 16;
182	446M	st->base \|= ucs >> st->shift;
183	446M	Strcat_char(os, BASE64_C(st->base));
184	446M	} else {
185	232M	if (st->state != WC_UTF7_BASE64) {
186	33.3M	Strcat_char(os, WC_C_UTF7_PLUS);
187	33.3M	st->state = WC_UTF7_BASE64;
188	33.3M	}
189	232M	st->shift = 16;
190	232M	st->base = 0;
191	232M	}
192	679M	st->shift -= 6;
193	679M	Strcat_char(os, BASE64_C((ucs >> st->shift) & 0x3f));
194	679M	st->shift -= 6;
195	679M	Strcat_char(os, BASE64_C((ucs >> st->shift) & 0x3f));
196	679M	if (st->shift) {
197	464M	st->shift -= 6;
198	464M	st->base = (ucs << (- st->shift)) & 0x3f;
199	464M	}
200	679M	return;
201	716M	}
202
203		static int
204		wc_push_tag_to_utf7(Str os, int ntag, wc_status *st)
205	35.6M	{
206	35.6M	char *p;
207
208	35.6M	if (ntag) {
209	17.8M	p = wc_ucs_get_tag(ntag);
210	17.8M	if (p == NULL)
211	606	ntag = 0;
212	17.8M	}
213	35.6M	if (ntag) {
214	17.8M	wc_push_ucs_to_utf7(os, WC_C_LANGUAGE_TAG, st);
215	319M	for (; *p; p++)
216	301M	wc_push_ucs_to_utf7(os, WC_C_LANGUAGE_TAG0 \| *p, st);
217	17.8M	} else
218	17.8M	wc_push_ucs_to_utf7(os, WC_C_CANCEL_TAG, st);
219	35.6M	return ntag;
220	35.6M	}
221
222		void
223		wc_push_to_utf7(Str os, wc_wchar_t cc, wc_status *st)
224	41.4M	{
225	41.4M	char *p;
226
227	42.7M	while (1) {
228	42.7M	switch (WC_CCS_SET(cc.ccs)) {
229	1.99k	case WC_CCS_UCS4:
230	1.99k	if (cc.code > WC_C_UNICODE_END) {
231	1.71k	cc.ccs = WC_CCS_IS_WIDE(cc.ccs) ? WC_CCS_UNKNOWN_W : WC_CCS_UNKNOWN;
232	1.71k	continue;
233	1.71k	}
234	3.60M	case WC_CCS_US_ASCII:
235	4.79M	case WC_CCS_UCS2:
236	4.79M	if (st->ntag)
237	2.28M	st->ntag = wc_push_tag_to_utf7(os, 0, st);
238	4.79M	wc_push_ucs_to_utf7(os, cc.code, st);
239	4.79M	return;
240	19.3M	case WC_CCS_UCS_TAG:
241	19.3M	if (WcOption.use_language_tag && wc_ucs_tag_to_tag(cc.code) != st->ntag)
242	17.8M	st->ntag = wc_push_tag_to_utf7(os, wc_ucs_tag_to_tag(cc.code), st);
243	19.3M	wc_push_ucs_to_utf7(os, wc_ucs_tag_to_ucs(cc.code), st);
244	19.3M	return;
245	497	case WC_CCS_ISO_8859_1:
246	497	if (st->ntag)
247	245	st->ntag = wc_push_tag_to_utf7(os, 0, st);
248	497	wc_push_ucs_to_utf7(os, cc.code \| 0x80, st);
249	497	return;
250	184k	case WC_CCS_UNKNOWN_W:
251	184k	if (!WcOption.no_replace) {
252	184k	if (st->ntag)
253	238	st->ntag = wc_push_tag_to_utf7(os, 0, st);
254	553k	for (p = WC_REPLACE_W; *p; p++)
255	368k	wc_push_ucs_to_utf7(os, (wc_uint32)*p, st);
256	184k	}
257	184k	return;
258	17.1M	case WC_CCS_UNKNOWN:
259	17.1M	if (!WcOption.no_replace) {
260	17.1M	if (st->ntag)
261	15.5M	st->ntag = wc_push_tag_to_utf7(os, 0, st);
262	34.2M	for (p = WC_REPLACE; *p; p++)
263	17.1M	wc_push_ucs_to_utf7(os, (wc_uint32)*p, st);
264	17.1M	}
265	17.1M	return;
266	1.35M	default:
267	1.35M	if (WcOption.ucs_conv &&
268	1.35M	(cc.code = wc_any_to_ucs(cc)) != WC_C_UCS4_ERROR)
269	1.16M	cc.ccs = WC_CCS_UCS2;
270	191k	else
271	191k	cc.ccs = WC_CCS_IS_WIDE(cc.ccs) ? WC_CCS_UNKNOWN_W : WC_CCS_UNKNOWN;
272	1.35M	continue;
273	42.7M	}
274	42.7M	}
275	41.4M	}
276
277		void
278		wc_push_to_utf7_end(Str os, wc_status *st)
279	700	{
280	700	if (st->ntag)
281	257	st->ntag = wc_push_tag_to_utf7(os, 0, st);
282	700	if (st->state == WC_UTF7_BASE64) {
283	472	if (st->shift)
284	369	Strcat_char(os, BASE64_C(st->base));
285	472	Strcat_char(os, WC_C_UTF7_MINUS);
286	472	}
287	700	return;
288	700	}
289
290		Str
291		wc_char_conv_from_utf7(wc_uchar c, wc_status *st)
292	0	{
293	0	static Str os;
294	0	static wc_uint32 high;
295	0	wc_uint32 b;
296
297	0	if (st->state == -1) {
298	0	st->state = WC_UTF7_NOSTATE;
299	0	os = Strnew_size(8);
300	0	}
301
302	0	switch (st->state) {
303	0	case WC_UTF7_NOSTATE:
304	0	if (c == WC_C_UTF7_PLUS) {
305	0	st->state = WC_UTF7_PLUS;
306	0	st->shift = 16;
307	0	st->base = 0;
308	0	high = 0;
309	0	return NULL;
310	0	}
311	0	break;
312	0	case WC_UTF7_PLUS:
313	0	if (c == WC_C_UTF7_MINUS) {
314	0	wtf_push_ucs(os, (wc_uint32)WC_C_UTF7_PLUS, st);
315	0	st->state = -1;
316	0	return os;
317	0	}
318	0	case WC_UTF7_BASE64:
319	0	switch (WC_UTF7_MAP[c]) {
320	0	case BB: /* [A-Za-z0-9/] */
321	0	case BP: /* '+' */
322	0	b = C_BASE64(c);
323	0	st->shift -= 6;
324	0	if (st->shift <= 0) {
325	0	st->base \|= b >> (- st->shift);
326	0	if (st->base >= WC_C_UCS2_SURROGATE &&
327	0	st->base < WC_C_UCS2_SURROGATE_LOW) {
328	0	if (! high)
329	0	high = st->base;
330	0	else
331	0	high = 0; /* error */
332	0	} else if (st->base >= WC_C_UCS2_SURROGATE_LOW &&
333	0	st->base <= WC_C_UCS2_SURROGATE_END) {
334	0	if (high)
335	0	wtf_push_ucs(os, wc_utf16_to_ucs(high, st->base), st);
336		/* else; / / error */
337	0	high = 0;
338	0	} else if (st->base != WC_C_UCS2_BOM)
339	0	wtf_push_ucs(os, st->base, st);
340	0	st->shift += 16;
341	0	st->base = 0;
342	0	}
343	0	st->base \|= (b << st->shift) & 0xffff;
344	0	st->state = WC_UTF7_BASE64;
345	0	return os;
346	0	case BM: /* '-' */
347	0	st->state = -1;
348	0	return NULL;
349	0	}
350	0	}
351	0	switch (WC_UTF7_MAP[c]) {
352	0	case CD:
353	0	case CB:
354	0	Strcat_char(os, (char)c);
355	0	break;
356	0	case C1:
357	0	break;
358	0	default:
359	0	wtf_push_ucs(os, (wc_uint32)c, st);
360	0	break;
361	0	}
362	0	st->state = -1;
363	0	return os;
364	0	}
365
366		#endif
367
368