LCOV - code coverage report
Current view: top level - src/backend/utils/mb/conversion_procs/euc_cn_and_mic - euc_cn_and_mic.c (source / functions) Hit Total Coverage
Test: PostgreSQL 13devel Lines: 37 54 68.5 %
Date: 2019-11-13 22:07:24 Functions: 7 7 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*-------------------------------------------------------------------------
       2             :  *
       3             :  *    EUC_CN and MULE_INTERNAL
       4             :  *
       5             :  * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
       6             :  * Portions Copyright (c) 1994, Regents of the University of California
       7             :  *
       8             :  * IDENTIFICATION
       9             :  *    src/backend/utils/mb/conversion_procs/euc_cn_and_mic/euc_cn_and_mic.c
      10             :  *
      11             :  *-------------------------------------------------------------------------
      12             :  */
      13             : 
      14             : #include "postgres.h"
      15             : #include "fmgr.h"
      16             : #include "mb/pg_wchar.h"
      17             : 
      18           4 : PG_MODULE_MAGIC;
      19             : 
      20           4 : PG_FUNCTION_INFO_V1(euc_cn_to_mic);
      21           4 : PG_FUNCTION_INFO_V1(mic_to_euc_cn);
      22             : 
      23             : /* ----------
      24             :  * conv_proc(
      25             :  *      INTEGER,    -- source encoding id
      26             :  *      INTEGER,    -- destination encoding id
      27             :  *      CSTRING,    -- source string (null terminated C string)
      28             :  *      CSTRING,    -- destination string (null terminated C string)
      29             :  *      INTEGER     -- source string length
      30             :  * ) returns VOID;
      31             :  * ----------
      32             :  */
      33             : 
      34             : static void euc_cn2mic(const unsigned char *euc, unsigned char *p, int len);
      35             : static void mic2euc_cn(const unsigned char *mic, unsigned char *p, int len);
      36             : 
      37             : Datum
      38           4 : euc_cn_to_mic(PG_FUNCTION_ARGS)
      39             : {
      40           4 :     unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
      41           4 :     unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
      42           4 :     int         len = PG_GETARG_INT32(4);
      43             : 
      44           4 :     CHECK_ENCODING_CONVERSION_ARGS(PG_EUC_CN, PG_MULE_INTERNAL);
      45             : 
      46           4 :     euc_cn2mic(src, dest, len);
      47             : 
      48           4 :     PG_RETURN_VOID();
      49             : }
      50             : 
      51             : Datum
      52           4 : mic_to_euc_cn(PG_FUNCTION_ARGS)
      53             : {
      54           4 :     unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
      55           4 :     unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
      56           4 :     int         len = PG_GETARG_INT32(4);
      57             : 
      58           4 :     CHECK_ENCODING_CONVERSION_ARGS(PG_MULE_INTERNAL, PG_EUC_CN);
      59             : 
      60           4 :     mic2euc_cn(src, dest, len);
      61             : 
      62           4 :     PG_RETURN_VOID();
      63             : }
      64             : 
      65             : /*
      66             :  * EUC_CN ---> MIC
      67             :  */
      68             : static void
      69           4 : euc_cn2mic(const unsigned char *euc, unsigned char *p, int len)
      70             : {
      71             :     int         c1;
      72             : 
      73          20 :     while (len > 0)
      74             :     {
      75          12 :         c1 = *euc;
      76          12 :         if (IS_HIGHBIT_SET(c1))
      77             :         {
      78           0 :             if (len < 2 || !IS_HIGHBIT_SET(euc[1]))
      79           0 :                 report_invalid_encoding(PG_EUC_CN, (const char *) euc, len);
      80           0 :             *p++ = LC_GB2312_80;
      81           0 :             *p++ = c1;
      82           0 :             *p++ = euc[1];
      83           0 :             euc += 2;
      84           0 :             len -= 2;
      85             :         }
      86             :         else
      87             :         {                       /* should be ASCII */
      88          12 :             if (c1 == 0)
      89           0 :                 report_invalid_encoding(PG_EUC_CN, (const char *) euc, len);
      90          12 :             *p++ = c1;
      91          12 :             euc++;
      92          12 :             len--;
      93             :         }
      94             :     }
      95           4 :     *p = '\0';
      96           4 : }
      97             : 
      98             : /*
      99             :  * MIC ---> EUC_CN
     100             :  */
     101             : static void
     102           4 : mic2euc_cn(const unsigned char *mic, unsigned char *p, int len)
     103             : {
     104             :     int         c1;
     105             : 
     106          20 :     while (len > 0)
     107             :     {
     108          12 :         c1 = *mic;
     109          12 :         if (IS_HIGHBIT_SET(c1))
     110             :         {
     111           0 :             if (c1 != LC_GB2312_80)
     112           0 :                 report_untranslatable_char(PG_MULE_INTERNAL, PG_EUC_CN,
     113             :                                            (const char *) mic, len);
     114           0 :             if (len < 3 || !IS_HIGHBIT_SET(mic[1]) || !IS_HIGHBIT_SET(mic[2]))
     115           0 :                 report_invalid_encoding(PG_MULE_INTERNAL,
     116             :                                         (const char *) mic, len);
     117           0 :             mic++;
     118           0 :             *p++ = *mic++;
     119           0 :             *p++ = *mic++;
     120           0 :             len -= 3;
     121             :         }
     122             :         else
     123             :         {                       /* should be ASCII */
     124          12 :             if (c1 == 0)
     125           0 :                 report_invalid_encoding(PG_MULE_INTERNAL,
     126             :                                         (const char *) mic, len);
     127          12 :             *p++ = c1;
     128          12 :             mic++;
     129          12 :             len--;
     130             :         }
     131             :     }
     132           4 :     *p = '\0';
     133           4 : }

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