miniconv.c.svn-base

psp播放器PPA源码,在MSYS/CYGWIN环境下编译（GNU-C）

#include <string.h>

typedef unsigned int ucs4_t;

/* Return code if invalid. (xxx_mbtowc) */
#define RET_ILSEQ      -1
/* Return code if only a shift sequence of n bytes was read. (xxx_mbtowc) */
#define RET_TOOFEW(n)  (-2-(n))

/* Return code if invalid. (xxx_wctomb) */
#define RET_ILUNI      -1
/* Return code if output buffer is too small. (xxx_wctomb, xxx_reset) */
#define RET_TOOSMALL   -2


/****************************************
 *                UTF-16 LE             *
 ****************************************/
static int
utf16le_mbtowc (ucs4_t *pwc, const unsigned char *s, int n)
{
  int count = 0;
  if (n >= 2) {
    ucs4_t wc = s[0] + (s[1] << 8);
    if (wc >= 0xd800 && wc < 0xdc00) {
      if (n >= 4) {
        ucs4_t wc2 = s[2] + (s[3] << 8);
        if (!(wc2 >= 0xdc00 && wc2 < 0xe000))
          return RET_ILSEQ;
        *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00);
        return count+4;
      }
    } else if (wc >= 0xdc00 && wc < 0xe000) {
      return RET_ILSEQ;
    } else {
      *pwc = wc;
      return count+2;
    }
  }
  return RET_TOOFEW(count);
}

/****************************************
 *                UTF-16 BE             *
 ****************************************/
static int
utf16be_mbtowc (ucs4_t *pwc, const unsigned char *s, int n)
{
  int count = 0;
  if (n >= 2) {
    ucs4_t wc = (s[0] << 8) + s[1];
    if (wc >= 0xd800 && wc < 0xdc00) {
      if (n >= 4) {
        ucs4_t wc2 = (s[2] << 8) + s[3];
        if (!(wc2 >= 0xdc00 && wc2 < 0xe000))
          return RET_ILSEQ;
        *pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00);
        return count+4;
      }
    } else if (wc >= 0xdc00 && wc < 0xe000) {
      return RET_ILSEQ;
    } else {
      *pwc = wc;
      return count+2;
    }
  }
  return RET_TOOFEW(count);
}

/****************************************
 *                UTF-8                 *
 ****************************************/
static int
utf8_wctomb (unsigned char *r, ucs4_t wc, int n) /* n == 0 is acceptable */
{
  int count;
  if (wc < 0x80)
    count = 1;
  else if (wc < 0x800)
    count = 2;
  else if (wc < 0x10000)
    count = 3;
  else if (wc < 0x200000)
    count = 4;
  else if (wc < 0x4000000)
    count = 5;
  else if (wc <= 0x7fffffff)
    count = 6;
  else
    return RET_ILUNI;
  if (n < count)
    return RET_TOOSMALL;
  switch (count) { /* note: code falls through cases! */
    case 6: r[5] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0x4000000;
    case 5: r[4] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0x200000;
    case 4: r[3] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0x10000;
    case 3: r[2] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0x800;
    case 2: r[1] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0xc0;
    case 1: r[0] = wc;
  }
  return count;
}


/****************************************
 *                ASCII                 *
 ****************************************/
static int
ascii_mbtowc (ucs4_t *pwc, const unsigned char *s, int n)
{
  unsigned char c = *s;
  if (c < 0x80) {
    *pwc = (ucs4_t) c;
    return 1;
  }
  return RET_ILSEQ;
}

#ifdef GBK_CONV
/****************************************
 *                GB2312                *
 ****************************************/
static const unsigned short gb2312_2uni_page21[831] = {
  /* 0x21 */
  0x3000, 0x3001, 0x3002, 0x30fb, 0x02c9, 0x02c7, 0x00a8, 0x3003,
  0x3005, 0x2015, 0xff5e, 0x2016, 0x2026, 0x2018, 0x2019, 0x201c,
  0x201d, 0x3014, 0x3015, 0x3008, 0x3009, 0x300a, 0x300b, 0x300c,
  0x300d, 0x300e, 0x300f, 0x3016, 0x3017, 0x3010, 0x3011, 0x00b1,
  0x00d7, 0x00f7, 0x2236, 0x2227, 0x2228, 0x2211, 0x220f, 0x222a,
  0x2229, 0x2208, 0x2237, 0x221a, 0x22a5, 0x2225, 0x2220, 0x2312,
  0x2299, 0x222b, 0x222e, 0x2261, 0x224c, 0x2248, 0x223d, 0x221d,
  0x2260, 0x226e, 0x226f, 0x2264, 0x2265, 0x221e, 0x2235, 0x2234,
  0x2642, 0x2640, 0x00b0, 0x2032, 0x2033, 0x2103, 0xff04, 0x00a4,
  0xffe0, 0xffe1, 0x2030, 0x00a7, 0x2116, 0x2606, 0x2605, 0x25cb,
  0x25cf, 0x25ce, 0x25c7, 0x25c6, 0x25a1, 0x25a0, 0x25b3, 0x25b2,
  0x203b, 0x2192, 0x2190, 0x2191, 0x2193, 0x3013,
  /* 0x22 */
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  0x2488, 0x2489, 0x248a, 0x248b, 0x248c, 0x248d, 0x248e, 0x248f,
  0x2490, 0x2491, 0x2492, 0x2493, 0x2494, 0x2495, 0x2496, 0x2497,
  0x2498, 0x2499, 0x249a, 0x249b, 0x2474, 0x2475, 0x2476, 0x2477,
  0x2478, 0x2479, 0x247a, 0x247b, 0x247c, 0x247d, 0x247e, 0x247f,
  0x2480, 0x2481, 0x2482, 0x2483, 0x2484, 0x2485, 0x2486, 0x2487,
  0x2460, 0x2461, 0x2462, 0x2463, 0x2464, 0x2465, 0x2466, 0x2467,
  0x2468, 0x2469, 0xfffd, 0xfffd, 0x3220, 0x3221, 0x3222, 0x3223,
  0x3224, 0x3225, 0x3226, 0x3227, 0x3228, 0x3229, 0xfffd, 0xfffd,
  0x2160, 0x2161, 0x2162, 0x2163, 0x2164, 0x2165, 0x2166, 0x2167,
  0x2168, 0x2169, 0x216a, 0x216b, 0xfffd, 0xfffd,
  /* 0x23 */
  0xff01, 0xff02, 0xff03, 0xffe5, 0xff05, 0xff06, 0xff07, 0xff08,
  0xff09, 0xff0a, 0xff0b, 0xff0c, 0xff0d, 0xff0e, 0xff0f, 0xff10,
  0xff11, 0xff12, 0xff13, 0xff14, 0xff15, 0xff16, 0xff17, 0xff18,
  0xff19, 0xff1a, 0xff1b, 0xff1c, 0xff1d, 0xff1e, 0xff1f, 0xff20,
  0xff21, 0xff22, 0xff23, 0xff24, 0xff25, 0xff26, 0xff27, 0xff28,
  0xff29, 0xff2a, 0xff2b, 0xff2c, 0xff2d, 0xff2e, 0xff2f, 0xff30,
  0xff31, 0xff32, 0xff33, 0xff34, 0xff35, 0xff36, 0xff37, 0xff38,
  0xff39, 0xff3a, 0xff3b, 0xff3c, 0xff3d, 0xff3e, 0xff3f, 0xff40,
  0xff41, 0xff42, 0xff43, 0xff44, 0xff45, 0xff46, 0xff47, 0xff48,
  0xff49, 0xff4a, 0xff4b, 0xff4c, 0xff4d, 0xff4e, 0xff4f, 0xff50,
  0xff51, 0xff52, 0xff53, 0xff54, 0xff55, 0xff56, 0xff57, 0xff58,
  0xff59, 0xff5a, 0xff5b, 0xff5c, 0xff5d, 0xffe3,
  /* 0x24 */
  0x3041, 0x3042, 0x3043, 0x3044, 0x3045, 0x3046, 0x3047, 0x3048,
  0x3049, 0x304a, 0x304b, 0x304c, 0x304d, 0x304e, 0x304f, 0x3050,
  0x3051, 0x3052, 0x3053, 0x3054, 0x3055, 0x3056, 0x3057, 0x3058,
  0x3059, 0x305a, 0x305b, 0x305c, 0x305d, 0x305e, 0x305f, 0x3060,
  0x3061, 0x3062, 0x3063, 0x3064, 0x3065, 0x3066, 0x3067, 0x3068,
  0x3069, 0x306a, 0x306b, 0x306c, 0x306d, 0x306e, 0x306f, 0x3070,
  0x3071, 0x3072, 0x3073, 0x3074, 0x3075, 0x3076, 0x3077, 0x3078,
  0x3079, 0x307a, 0x307b, 0x307c, 0x307d, 0x307e, 0x307f, 0x3080,
  0x3081, 0x3082, 0x3083, 0x3084, 0x3085, 0x3086, 0x3087, 0x3088,
  0x3089, 0x308a, 0x308b, 0x308c, 0x308d, 0x308e, 0x308f, 0x3090,
  0x3091, 0x3092, 0x3093, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  /* 0x25 */
  0x30a1, 0x30a2, 0x30a3, 0x30a4, 0x30a5, 0x30a6, 0x30a7, 0x30a8,
  0x30a9, 0x30aa, 0x30ab, 0x30ac, 0x30ad, 0x30ae, 0x30af, 0x30b0,
  0x30b1, 0x30b2, 0x30b3, 0x30b4, 0x30b5, 0x30b6, 0x30b7, 0x30b8,
  0x30b9, 0x30ba, 0x30bb, 0x30bc, 0x30bd, 0x30be, 0x30bf, 0x30c0,
  0x30c1, 0x30c2, 0x30c3, 0x30c4, 0x30c5, 0x30c6, 0x30c7, 0x30c8,
  0x30c9, 0x30ca, 0x30cb, 0x30cc, 0x30cd, 0x30ce, 0x30cf, 0x30d0,
  0x30d1, 0x30d2, 0x30d3, 0x30d4, 0x30d5, 0x30d6, 0x30d7, 0x30d8,
  0x30d9, 0x30da, 0x30db, 0x30dc, 0x30dd, 0x30de, 0x30df, 0x30e0,
  0x30e1, 0x30e2, 0x30e3, 0x30e4, 0x30e5, 0x30e6, 0x30e7, 0x30e8,
  0x30e9, 0x30ea, 0x30eb, 0x30ec, 0x30ed, 0x30ee, 0x30ef, 0x30f0,
  0x30f1, 0x30f2, 0x30f3, 0x30f4, 0x30f5, 0x30f6, 0xfffd, 0xfffd,
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  /* 0x26 */
  0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396, 0x0397, 0x0398,
  0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e, 0x039f, 0x03a0,
  0x03a1, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7, 0x03a8, 0x03a9,
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7, 0x03b8,
  0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf, 0x03c0,
  0x03c1, 0x03c3, 0x03c4, 0x03c5, 0x03c6, 0x03c7, 0x03c8, 0x03c9,
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  /* 0x27 */
  0x0410, 0x0411, 0x0412, 0x0413, 0x0414, 0x0415, 0x0401, 0x0416,
  0x0417, 0x0418, 0x0419, 0x041a, 0x041b, 0x041c, 0x041d, 0x041e,
  0x041f, 0x0420, 0x0421, 0x0422, 0x0423, 0x0424, 0x0425, 0x0426,
  0x0427, 0x0428, 0x0429, 0x042a, 0x042b, 0x042c, 0x042d, 0x042e,
  0x042f, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0451, 0x0436,
  0x0437, 0x0438, 0x0439, 0x043a, 0x043b, 0x043c, 0x043d, 0x043e,
  0x043f, 0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446,
  0x0447, 0x0448, 0x0449, 0x044a, 0x044b, 0x044c, 0x044d, 0x044e,
  0x044f, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  /* 0x28 */
  0x0101, 0x00e1, 0x01ce, 0x00e0, 0x0113, 0x00e9, 0x011b, 0x00e8,
  0x012b, 0x00ed, 0x01d0, 0x00ec, 0x014d, 0x00f3, 0x01d2, 0x00f2,
  0x016b, 0x00fa, 0x01d4, 0x00f9, 0x01d6, 0x01d8, 0x01da, 0x01dc,
  0x00fc, 0x00ea, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0x3105, 0x3106, 0x3107, 0x3108,
  0x3109, 0x310a, 0x310b, 0x310c, 0x310d, 0x310e, 0x310f, 0x3110,
  0x3111, 0x3112, 0x3113, 0x3114, 0x3115, 0x3116, 0x3117, 0x3118,
  0x3119, 0x311a, 0x311b, 0x311c, 0x311d, 0x311e, 0x311f, 0x3120,
  0x3121, 0x3122, 0x3123, 0x3124, 0x3125, 0x3126, 0x3127, 0x3128,
  0x3129, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd, 0xfffd,
  /* 0x29 */
  0xfffd, 0xfffd, 0xfffd, 0x2500, 0x2501, 0x2502, 0x2503, 0x2504,
  0x2505, 0x2506, 0x2507, 0x2508, 0x2509, 0x250a, 0x250b, 0x250c,