diff options
Diffstat (limited to 'iconvdata/utf-7.c')
| -rw-r--r-- | iconvdata/utf-7.c | 234 |
1 files changed, 172 insertions, 62 deletions
diff --git a/iconvdata/utf-7.c b/iconvdata/utf-7.c index 815b189..393fd35 100644 --- a/iconvdata/utf-7.c +++ b/iconvdata/utf-7.c @@ -27,8 +27,27 @@ #include <gconv.h> #include <stdint.h> #include <stdlib.h> +#include <string.h> +enum variant +{ + UTF7, +}; + +/* Must be in the same order as enum variant above. */ +static const char names[] = + "UTF-7//\0" + "\0"; + +static uint32_t +shift_character (enum variant const var) +{ + if (var == UTF7) + return '+'; + else + abort (); +} static bool between (uint32_t const ch, @@ -42,30 +61,38 @@ between (uint32_t const ch, */ static bool -isdirect (uint32_t ch) +isdirect (uint32_t ch, enum variant var) { - return (between (ch, 'A', 'Z') - || between (ch, 'a', 'z') - || between (ch, '0', '9') - || ch == '\'' || ch == '(' || ch == ')' - || between (ch, ',', '/') - || ch == ':' || ch == '?' - || ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r'); + if (var == UTF7) + return (between (ch, 'A', 'Z') + || between (ch, 'a', 'z') + || between (ch, '0', '9') + || ch == '\'' || ch == '(' || ch == ')' + || between (ch, ',', '/') + || ch == ':' || ch == '?' + || ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r'); + abort (); } /* The set of "direct and optional direct characters": A-Z a-z 0-9 ' ( ) , - . / : ? space tab lf cr + (UTF-7 only) ! " # $ % & * ; < = > @ [ ] ^ _ ` { | } */ static bool -isxdirect (uint32_t ch) +isxdirect (uint32_t ch, enum variant var) { - return (ch == '\t' - || ch == '\n' - || ch == '\r' - || (between (ch, ' ', '}') && ch != '+' && ch != '\\')); + if (isdirect (ch, var)) + return true; + if (var != UTF7) + return false; + return between (ch, '!', '&') + || ch == '*' + || between (ch, ';', '@') + || (between (ch, '[', '`') && ch != '\\') + || between (ch, '{', '}'); } @@ -85,7 +112,7 @@ needs_explicit_shift (uint32_t ch) /* Converts a value in the range 0..63 to a base64 encoded char. */ static unsigned char -base64 (unsigned int i) +base64 (unsigned int i, enum variant var) { if (i < 26) return i + 'A'; @@ -95,7 +122,7 @@ base64 (unsigned int i) return i - 52 + '0'; else if (i == 62) return '+'; - else if (i == 63) + else if (i == 63 && var == UTF7) return '/'; else abort (); @@ -103,9 +130,8 @@ base64 (unsigned int i) /* Definitions used in the body of the `gconv' function. */ -#define CHARSET_NAME "UTF-7//" -#define DEFINE_INIT 1 -#define DEFINE_FINI 1 +#define DEFINE_INIT 0 +#define DEFINE_FINI 0 #define FROM_LOOP from_utf7_loop #define TO_LOOP to_utf7_loop #define MIN_NEEDED_FROM 1 @@ -113,11 +139,27 @@ base64 (unsigned int i) #define MIN_NEEDED_TO 4 #define MAX_NEEDED_TO 4 #define ONE_DIRECTION 0 +#define FROM_DIRECTION (dir == from_utf7) #define PREPARE_LOOP \ mbstate_t saved_state; \ - mbstate_t *statep = data->__statep; -#define EXTRA_LOOP_ARGS , statep + mbstate_t *statep = data->__statep; \ + enum direction dir = ((struct utf7_data *) step->__data)->dir; \ + enum direction var = ((struct utf7_data *) step->__data)->var; +#define EXTRA_LOOP_ARGS , statep, var + +enum direction +{ + illegal_dir, + from_utf7, + to_utf7 +}; + +struct utf7_data +{ + enum direction dir; + enum variant var; +}; /* Since we might have to reset input pointer we must be able to save and restore the state. */ @@ -127,6 +169,70 @@ base64 (unsigned int i) else \ *statep = saved_state +int +gconv_init (struct __gconv_step *step) +{ + /* Determine which direction. */ + struct utf7_data *new_data; + enum direction dir = illegal_dir; + + enum variant var = 0; + for (const char *name = names; *name != '\0'; + name = __rawmemchr (name, '\0') + 1) + { + if (__strcasecmp (step->__from_name, name) == 0) + { + dir = from_utf7; + break; + } + else if (__strcasecmp (step->__to_name, name) == 0) + { + dir = to_utf7; + break; + } + ++var; + } + + if (__glibc_likely (dir != illegal_dir)) + { + new_data = malloc (sizeof (*new_data)); + if (new_data == NULL) + return __GCONV_NOMEM; + + new_data->dir = dir; + new_data->var = var; + step->__data = new_data; + + if (dir == from_utf7) + { + step->__min_needed_from = MIN_NEEDED_FROM; + step->__max_needed_from = MAX_NEEDED_FROM; + step->__min_needed_to = MIN_NEEDED_TO; + step->__max_needed_to = MAX_NEEDED_TO; + } + else + { + step->__min_needed_from = MIN_NEEDED_TO; + step->__max_needed_from = MAX_NEEDED_TO; + step->__min_needed_to = MIN_NEEDED_FROM; + step->__max_needed_to = MAX_NEEDED_FROM; + } + } + else + return __GCONV_NOCONV; + + step->__stateful = 1; + + return __GCONV_OK; +} + +void +gconv_end (struct __gconv_step *data) +{ + free (data->__data); +} + + /* First define the conversion function from UTF-7 to UCS4. The state is structured as follows: @@ -154,13 +260,13 @@ base64 (unsigned int i) if ((statep->__count >> 3) == 0) \ { \ /* base64 encoding inactive. */ \ - if (isxdirect (ch)) \ + if (isxdirect (ch, var)) \ { \ inptr++; \ put32 (outptr, ch); \ outptr += 4; \ } \ - else if (__glibc_likely (ch == '+')) \ + else if (__glibc_likely (ch == shift_character (var))) \ { \ if (__glibc_unlikely (inptr + 2 > inend)) \ { \ @@ -285,7 +391,7 @@ base64 (unsigned int i) } \ } #define LOOP_NEED_FLAGS -#define EXTRA_LOOP_DECLS , mbstate_t *statep +#define EXTRA_LOOP_DECLS , mbstate_t *statep, enum variant var #include <iconv/loop.c> @@ -316,7 +422,7 @@ base64 (unsigned int i) if ((statep->__count & 0x18) == 0) \ { \ /* base64 encoding inactive */ \ - if (isdirect (ch)) \ + if (isdirect (ch, var)) \ { \ *outptr++ = (unsigned char) ch; \ } \ @@ -324,7 +430,7 @@ base64 (unsigned int i) { \ size_t count; \ \ - if (ch == '+') \ + if (ch == shift_character (var)) \ count = 2; \ else if (ch < 0x10000) \ count = 3; \ @@ -339,13 +445,13 @@ base64 (unsigned int i) break; \ } \ \ - *outptr++ = '+'; \ - if (ch == '+') \ + *outptr++ = shift_character (var); \ + if (ch == shift_character (var)) \ *outptr++ = '-'; \ else if (ch < 0x10000) \ { \ - *outptr++ = base64 (ch >> 10); \ - *outptr++ = base64 ((ch >> 4) & 0x3f); \ + *outptr++ = base64 (ch >> 10, var); \ + *outptr++ = base64 ((ch >> 4) & 0x3f, var); \ statep->__count = ((ch & 15) << 5) | (3 << 3); \ } \ else if (ch < 0x110000) \ @@ -354,11 +460,11 @@ base64 (unsigned int i) uint32_t ch2 = 0xdc00 + ((ch - 0x10000) & 0x3ff); \ \ ch = (ch1 << 16) | ch2; \ - *outptr++ = base64 (ch >> 26); \ - *outptr++ = base64 ((ch >> 20) & 0x3f); \ - *outptr++ = base64 ((ch >> 14) & 0x3f); \ - *outptr++ = base64 ((ch >> 8) & 0x3f); \ - *outptr++ = base64 ((ch >> 2) & 0x3f); \ + *outptr++ = base64 (ch >> 26, var); \ + *outptr++ = base64 ((ch >> 20) & 0x3f, var); \ + *outptr++ = base64 ((ch >> 14) & 0x3f, var); \ + *outptr++ = base64 ((ch >> 8) & 0x3f, var); \ + *outptr++ = base64 ((ch >> 2) & 0x3f, var); \ statep->__count = ((ch & 3) << 7) | (2 << 3); \ } \ else \ @@ -368,7 +474,7 @@ base64 (unsigned int i) else \ { \ /* base64 encoding active */ \ - if (isdirect (ch)) \ + if (isdirect (ch, var)) \ { \ /* deactivate base64 encoding */ \ size_t count; \ @@ -382,7 +488,7 @@ base64 (unsigned int i) } \ \ if ((statep->__count & 0x18) >= 0x10) \ - *outptr++ = base64 ((statep->__count >> 3) & ~3); \ + *outptr++ = base64 ((statep->__count >> 3) & ~3, var); \ if (needs_explicit_shift (ch)) \ *outptr++ = '-'; \ *outptr++ = (unsigned char) ch; \ @@ -410,22 +516,24 @@ base64 (unsigned int i) switch ((statep->__count >> 3) & 3) \ { \ case 1: \ - *outptr++ = base64 (ch >> 10); \ - *outptr++ = base64 ((ch >> 4) & 0x3f); \ + *outptr++ = base64 (ch >> 10, var); \ + *outptr++ = base64 ((ch >> 4) & 0x3f, var); \ statep->__count = ((ch & 15) << 5) | (3 << 3); \ break; \ case 2: \ *outptr++ = \ - base64 (((statep->__count >> 3) & ~3) | (ch >> 12)); \ - *outptr++ = base64 ((ch >> 6) & 0x3f); \ - *outptr++ = base64 (ch & 0x3f); \ + base64 (((statep->__count >> 3) & ~3) | (ch >> 12), \ + var); \ + *outptr++ = base64 ((ch >> 6) & 0x3f, var); \ + *outptr++ = base64 (ch & 0x3f, var); \ statep->__count = (1 << 3); \ break; \ case 3: \ *outptr++ = \ - base64 (((statep->__count >> 3) & ~3) | (ch >> 14)); \ - *outptr++ = base64 ((ch >> 8) & 0x3f); \ - *outptr++ = base64 ((ch >> 2) & 0x3f); \ + base64 (((statep->__count >> 3) & ~3) | (ch >> 14), \ + var); \ + *outptr++ = base64 ((ch >> 8) & 0x3f, var); \ + *outptr++ = base64 ((ch >> 2) & 0x3f, var); \ statep->__count = ((ch & 3) << 7) | (2 << 3); \ break; \ default: \ @@ -441,30 +549,32 @@ base64 (unsigned int i) switch ((statep->__count >> 3) & 3) \ { \ case 1: \ - *outptr++ = base64 (ch >> 26); \ - *outptr++ = base64 ((ch >> 20) & 0x3f); \ - *outptr++ = base64 ((ch >> 14) & 0x3f); \ - *outptr++ = base64 ((ch >> 8) & 0x3f); \ - *outptr++ = base64 ((ch >> 2) & 0x3f); \ + *outptr++ = base64 (ch >> 26, var); \ + *outptr++ = base64 ((ch >> 20) & 0x3f, var); \ + *outptr++ = base64 ((ch >> 14) & 0x3f, var); \ + *outptr++ = base64 ((ch >> 8) & 0x3f, var); \ + *outptr++ = base64 ((ch >> 2) & 0x3f, var); \ statep->__count = ((ch & 3) << 7) | (2 << 3); \ break; \ case 2: \ *outptr++ = \ - base64 (((statep->__count >> 3) & ~3) | (ch >> 28)); \ - *outptr++ = base64 ((ch >> 22) & 0x3f); \ - *outptr++ = base64 ((ch >> 16) & 0x3f); \ - *outptr++ = base64 ((ch >> 10) & 0x3f); \ - *outptr++ = base64 ((ch >> 4) & 0x3f); \ + base64 (((statep->__count >> 3) & ~3) | (ch >> 28), \ + var); \ + *outptr++ = base64 ((ch >> 22) & 0x3f, var); \ + *outptr++ = base64 ((ch >> 16) & 0x3f, var); \ + *outptr++ = base64 ((ch >> 10) & 0x3f, var); \ + *outptr++ = base64 ((ch >> 4) & 0x3f, var); \ statep->__count = ((ch & 15) << 5) | (3 << 3); \ break; \ case 3: \ *outptr++ = \ - base64 (((statep->__count >> 3) & ~3) | (ch >> 30)); \ - *outptr++ = base64 ((ch >> 24) & 0x3f); \ - *outptr++ = base64 ((ch >> 18) & 0x3f); \ - *outptr++ = base64 ((ch >> 12) & 0x3f); \ - *outptr++ = base64 ((ch >> 6) & 0x3f); \ - *outptr++ = base64 (ch & 0x3f); \ + base64 (((statep->__count >> 3) & ~3) | (ch >> 30), \ + var); \ + *outptr++ = base64 ((ch >> 24) & 0x3f, var); \ + *outptr++ = base64 ((ch >> 18) & 0x3f, var); \ + *outptr++ = base64 ((ch >> 12) & 0x3f, var); \ + *outptr++ = base64 ((ch >> 6) & 0x3f, var); \ + *outptr++ = base64 (ch & 0x3f, var); \ statep->__count = (1 << 3); \ break; \ default: \ @@ -480,7 +590,7 @@ base64 (unsigned int i) inptr += 4; \ } #define LOOP_NEED_FLAGS -#define EXTRA_LOOP_DECLS , mbstate_t *statep +#define EXTRA_LOOP_DECLS , mbstate_t *statep, enum variant var #include <iconv/loop.c> @@ -510,7 +620,7 @@ base64 (unsigned int i) { \ /* Write out the shift sequence. */ \ if ((state & 0x18) >= 0x10) \ - *outbuf++ = base64 ((state >> 3) & ~3); \ + *outbuf++ = base64 ((state >> 3) & ~3, var); \ *outbuf++ = '-'; \ \ data->__statep->__count = 0; \ |