ts_locale.c File Reference

#include "postgres.h"
#include "common/string.h"
#include "storage/fd.h"
#include "tsearch/ts_locale.h"

Include dependency graph for ts_locale.c:

Go to the source code of this file.

Macros
#define	WC_BUF_LEN   2
#define	GENERATE_T_ISCLASS_DEF(character_class)

Functions
static void	tsearch_readline_callback (void *arg)
bool	tsearch_readline_begin (tsearch_readline_state *stp, const char *filename)
char *	tsearch_readline (tsearch_readline_state *stp)
void	tsearch_readline_end (tsearch_readline_state *stp)

Macro Definition Documentation

GENERATE_T_ISCLASS_DEF

#define GENERATE_T_ISCLASS_DEF

(

character_class

)

Value:

/* mblen shall be that of the first character */ \
int \
t_is##character_class##_with_len(const char *ptr, int mblen) \
{ \
    pg_wchar    wstr[WC_BUF_LEN]; \
    int         wlen pg_attribute_unused(); \
    wlen = pg_mb2wchar_with_len(ptr, wstr, mblen); \
	Assert(wlen <= 1); \
    /* pass single character, or NUL if empty */ \
    return pg_isw##character_class(wstr[0], pg_database_locale()); \
} \
\
/* ptr shall point to a NUL-terminated string */ \
int \
t_is##character_class##_cstr(const char *ptr) \
{ \
    return t_is##character_class##_with_len(ptr, pg_mblen_cstr(ptr)); \
} \
/* ptr shall point to a string with pre-validated encoding */ \
int \
t_is##character_class##_unbounded(const char *ptr) \
{ \
    return t_is##character_class##_with_len(ptr, pg_mblen_unbounded(ptr)); \
} \
/* historical name for _unbounded */ \
int \
t_is##character_class(const char *ptr) \
{ \
    return t_is##character_class##_unbounded(ptr); \
}

Definition at line 26 of file ts_locale.c.

{ \
    pg_wchar    wstr[WC_BUF_LEN]; \
    int         wlen pg_attribute_unused(); \
    wlen = pg_mb2wchar_with_len(ptr, wstr, mblen); \
	Assert(wlen <= 1); \
    /* pass single character, or NUL if empty */ \
    return pg_isw##character_class(wstr[0], pg_database_locale()); \
} \
\
/* ptr shall point to a NUL-terminated string */ \
int \
t_is##character_class##_cstr(const char *ptr) \
{ \
    return t_is##character_class##_with_len(ptr, pg_mblen_cstr(ptr)); \
} \
/* ptr shall point to a string with pre-validated encoding */ \
int \
t_is##character_class##_unbounded(const char *ptr) \
{ \
    return t_is##character_class##_with_len(ptr, pg_mblen_unbounded(ptr)); \
} \
/* historical name for _unbounded */ \
int \
t_is##character_class(const char *ptr) \
{ \
    return t_is##character_class##_unbounded(ptr); \
}

WC_BUF_LEN

#define WC_BUF_LEN   2

Definition at line 24 of file ts_locale.c.

Function Documentation

tsearch_readline()

char * tsearch_readline

(

tsearch_readline_state *

stp

)

Definition at line 108 of file ts_locale.c.

{
    char       *recoded;
 
    /* Advance line number to use in error reports */
    stp->lineno++;
 
    /* Clear curline, it's no longer relevant */
    if (stp->curline)
    {
        if (stp->curline != stp->buf.data)
            pfree(stp->curline);
        stp->curline = NULL;
    }
 
    /* Collect next line, if there is one */
    if (!pg_get_line_buf(stp->fp, &stp->buf))
        return NULL;
 
    /* Validate the input as UTF-8, then convert to DB encoding if needed */
    recoded = pg_any_to_server(stp->buf.data, stp->buf.len, PG_UTF8);
 
    /* Save the correctly-encoded string for possible error reports */
    stp->curline = recoded;     /* might be equal to buf.data */
 
    /*
     * We always return a freshly pstrdup'd string.  This is clearly necessary
     * if pg_any_to_server() returned buf.data, and we need a second copy even
     * if encoding conversion did occur.  The caller is entitled to pfree the
     * returned string at any time, which would leave curline pointing to
     * recycled storage, causing problems if an error occurs after that point.
     * (It's preferable to return the result of pstrdup instead of the output
     * of pg_any_to_server, because the conversion result tends to be
     * over-allocated.  Since callers might save the result string directly
     * into a long-lived dictionary structure, we don't want it to be a larger
     * palloc chunk than necessary.  We'll reclaim the conversion result on
     * the next call.)
     */
    return pstrdup(recoded);
}

References fb(), pfree(), pg_any_to_server(), pg_get_line_buf(), PG_UTF8, and pstrdup().

Referenced by dsynonym_init(), initTrie(), NIImportAffixes(), NIImportDictionary(), NIImportOOAffixes(), read_dictionary(), readstoplist(), and thesaurusRead().

tsearch_readline_begin()

bool tsearch_readline_begin	(	tsearch_readline_state *	stp,
		const char *	filename
	)

Definition at line 85 of file ts_locale.c.

{
    if ((stp->fp = AllocateFile(filename, "r")) == NULL)
        return false;
    stp->filename = filename;
    stp->lineno = 0;
    initStringInfo(&stp->buf);
    stp->curline = NULL;
    /* Setup error traceback support for ereport() */
    stp->cb.callback = tsearch_readline_callback;
    stp->cb.arg = stp;
    stp->cb.previous = error_context_stack;
    error_context_stack = &stp->cb;
    return true;
}

References AllocateFile(), error_context_stack, fb(), filename, initStringInfo(), and tsearch_readline_callback().

Referenced by dsynonym_init(), initTrie(), NIImportAffixes(), NIImportDictionary(), NIImportOOAffixes(), read_dictionary(), readstoplist(), and thesaurusRead().

tsearch_readline_callback()

static void tsearch_readline_callback ( void *  arg )

static

Definition at line 176 of file ts_locale.c.

{
    tsearch_readline_state *stp = (tsearch_readline_state *) arg;
 
    /*
     * We can't include the text of the config line for errors that occur
     * during tsearch_readline() itself.  The major cause of such errors is
     * encoding violations, and we daren't try to print error messages
     * containing badly-encoded data.
     */
    if (stp->curline)
        errcontext("line %d of configuration file \"%s\": \"%s\"",
                   stp->lineno,
                   stp->filename,
                   stp->curline);
    else
        errcontext("line %d of configuration file \"%s\"",
                   stp->lineno,
                   stp->filename);
}

References arg, errcontext, and fb().

Referenced by tsearch_readline_begin().

tsearch_readline_end()

void tsearch_readline_end

(

tsearch_readline_state *

stp

)

Definition at line 153 of file ts_locale.c.

{
    /* Suppress use of curline in any error reported below */
    if (stp->curline)
    {
        if (stp->curline != stp->buf.data)
            pfree(stp->curline);
        stp->curline = NULL;
    }
 
    /* Release other resources */
    pfree(stp->buf.data);
    FreeFile(stp->fp);
 
    /* Pop the error context stack */
    error_context_stack = stp->cb.previous;
}

References error_context_stack, fb(), FreeFile(), pfree(), and ErrorContextCallback::previous.

Referenced by dsynonym_init(), initTrie(), NIImportAffixes(), NIImportDictionary(), NIImportOOAffixes(), read_dictionary(), readstoplist(), and thesaurusRead().