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 15devel Lines: 41 68 60.3 %
Date: 2021-11-29 05:09:10 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) 1996-2021, 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             :  *      BOOL        -- if true, don't throw an error if conversion fails
      31             :  * ) returns INTEGER;
      32             :  *
      33             :  * Returns the number of bytes successfully converted.
      34             :  * ----------
      35             :  */
      36             : 
      37             : static int  euc_cn2mic(const unsigned char *euc, unsigned char *p, int len, bool noError);
      38             : static int  mic2euc_cn(const unsigned char *mic, unsigned char *p, int len, bool noError);
      39             : 
      40             : Datum
      41           4 : euc_cn_to_mic(PG_FUNCTION_ARGS)
      42             : {
      43           4 :     unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
      44           4 :     unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
      45           4 :     int         len = PG_GETARG_INT32(4);
      46           4 :     bool        noError = PG_GETARG_BOOL(5);
      47             :     int         converted;
      48             : 
      49           4 :     CHECK_ENCODING_CONVERSION_ARGS(PG_EUC_CN, PG_MULE_INTERNAL);
      50             : 
      51           4 :     converted = euc_cn2mic(src, dest, len, noError);
      52             : 
      53           4 :     PG_RETURN_INT32(converted);
      54             : }
      55             : 
      56             : Datum
      57           4 : mic_to_euc_cn(PG_FUNCTION_ARGS)
      58             : {
      59           4 :     unsigned char *src = (unsigned char *) PG_GETARG_CSTRING(2);
      60           4 :     unsigned char *dest = (unsigned char *) PG_GETARG_CSTRING(3);
      61           4 :     int         len = PG_GETARG_INT32(4);
      62           4 :     bool        noError = PG_GETARG_BOOL(5);
      63             :     int         converted;
      64             : 
      65           4 :     CHECK_ENCODING_CONVERSION_ARGS(PG_MULE_INTERNAL, PG_EUC_CN);
      66             : 
      67           4 :     converted = mic2euc_cn(src, dest, len, noError);
      68             : 
      69           4 :     PG_RETURN_INT32(converted);
      70             : }
      71             : 
      72             : /*
      73             :  * EUC_CN ---> MIC
      74             :  */
      75             : static int
      76           4 : euc_cn2mic(const unsigned char *euc, unsigned char *p, int len, bool noError)
      77             : {
      78           4 :     const unsigned char *start = euc;
      79             :     int         c1;
      80             : 
      81          16 :     while (len > 0)
      82             :     {
      83          12 :         c1 = *euc;
      84          12 :         if (IS_HIGHBIT_SET(c1))
      85             :         {
      86           0 :             if (len < 2 || !IS_HIGHBIT_SET(euc[1]))
      87             :             {
      88           0 :                 if (noError)
      89           0 :                     break;
      90           0 :                 report_invalid_encoding(PG_EUC_CN, (const char *) euc, len);
      91             :             }
      92           0 :             *p++ = LC_GB2312_80;
      93           0 :             *p++ = c1;
      94           0 :             *p++ = euc[1];
      95           0 :             euc += 2;
      96           0 :             len -= 2;
      97             :         }
      98             :         else
      99             :         {                       /* should be ASCII */
     100          12 :             if (c1 == 0)
     101             :             {
     102           0 :                 if (noError)
     103           0 :                     break;
     104           0 :                 report_invalid_encoding(PG_EUC_CN, (const char *) euc, len);
     105             :             }
     106          12 :             *p++ = c1;
     107          12 :             euc++;
     108          12 :             len--;
     109             :         }
     110             :     }
     111           4 :     *p = '\0';
     112             : 
     113           4 :     return euc - start;
     114             : }
     115             : 
     116             : /*
     117             :  * MIC ---> EUC_CN
     118             :  */
     119             : static int
     120           4 : mic2euc_cn(const unsigned char *mic, unsigned char *p, int len, bool noError)
     121             : {
     122           4 :     const unsigned char *start = mic;
     123             :     int         c1;
     124             : 
     125          16 :     while (len > 0)
     126             :     {
     127          12 :         c1 = *mic;
     128          12 :         if (IS_HIGHBIT_SET(c1))
     129             :         {
     130           0 :             if (c1 != LC_GB2312_80)
     131             :             {
     132           0 :                 if (noError)
     133           0 :                     break;
     134           0 :                 report_untranslatable_char(PG_MULE_INTERNAL, PG_EUC_CN,
     135             :                                            (const char *) mic, len);
     136             :             }
     137           0 :             if (len < 3 || !IS_HIGHBIT_SET(mic[1]) || !IS_HIGHBIT_SET(mic[2]))
     138             :             {
     139           0 :                 if (noError)
     140           0 :                     break;
     141           0 :                 report_invalid_encoding(PG_MULE_INTERNAL,
     142             :                                         (const char *) mic, len);
     143             :             }
     144           0 :             mic++;
     145           0 :             *p++ = *mic++;
     146           0 :             *p++ = *mic++;
     147           0 :             len -= 3;
     148             :         }
     149             :         else
     150             :         {                       /* should be ASCII */
     151          12 :             if (c1 == 0)
     152             :             {
     153           0 :                 if (noError)
     154           0 :                     break;
     155           0 :                 report_invalid_encoding(PG_MULE_INTERNAL,
     156             :                                         (const char *) mic, len);
     157             :             }
     158          12 :             *p++ = c1;
     159          12 :             mic++;
     160          12 :             len--;
     161             :         }
     162             :     }
     163           4 :     *p = '\0';
     164             : 
     165           4 :     return mic - start;
     166             : }

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