PostgreSQL Source Code git master
Functions
scansup.c File Reference
#include "postgres.h"
#include <ctype.h>
#include "mb/pg_wchar.h"
#include "parser/scansup.h"
Include dependency graph for scansup.c:

Go to the source code of this file.

Functions

char *  downcase_truncate_identifier (const char *ident, int len, bool warn)
 
char *  downcase_identifier (const char *ident, int len, bool warn, bool truncate)
 
void  truncate_identifier (char *ident, int len, bool warn)
 
bool  scanner_isspace (char ch)
 

Function Documentation

◆ downcase_identifier()

char * downcase_identifier ( const char *  ident,
int  len,
bool  warn,
bool  truncate 
)

Definition at line 46 of file scansup.c.

47{
48 char *result;
49 int i;
50 bool enc_is_single_byte;
51
52 result = palloc(len + 1);
53 enc_is_single_byte = pg_database_encoding_max_length() == 1;
54
55 /*
56 * SQL99 specifies Unicode-aware case normalization, which we don't yet
57 * have the infrastructure for. Instead we use tolower() to provide a
58 * locale-aware translation. However, there are some locales where this
59 * is not right either (eg, Turkish may do strange things with 'i' and
60 * 'I'). Our current compromise is to use tolower() for characters with
61 * the high bit set, as long as they aren't part of a multi-byte
62 * character, and use an ASCII-only downcasing for 7-bit characters.
63 */
64 for (i = 0; i < len; i++)
65 {
66 unsigned char ch = (unsigned char) ident[i];
67
68 if (ch >= 'A' && ch <= 'Z')
69 ch += 'a' - 'A';
70 else if (enc_is_single_byte && IS_HIGHBIT_SET(ch) && isupper(ch))
71 ch = tolower(ch);
72 result[i] = (char) ch;
73 }
74 result[i] = '0円';
75
76 if (i >= NAMEDATALEN && truncate)
77 truncate_identifier(result, i, warn);
78
79 return result;
80}
#define IS_HIGHBIT_SET(ch)
Definition: c.h:1154
#define ident
Definition: indent_codes.h:47
i
int i
Definition: isn.c:77
int pg_database_encoding_max_length(void)
Definition: mbutils.c:1547
void * palloc(Size size)
Definition: mcxt.c:1365
#define NAMEDATALEN
const void size_t len
void truncate_identifier(char *ident, int len, bool warn)
Definition: scansup.c:93
warn
Definition: strftime.c:110

References i, ident, IS_HIGHBIT_SET, len, NAMEDATALEN, palloc(), pg_database_encoding_max_length(), and truncate_identifier().

Referenced by downcase_truncate_identifier(), and parse_ident().

◆ downcase_truncate_identifier()

char * downcase_truncate_identifier ( const char *  ident,
int  len,
bool  warn 
)

Definition at line 37 of file scansup.c.

38{
39 return downcase_identifier(ident, len, warn, true);
40}
char * downcase_identifier(const char *ident, int len, bool warn, bool truncate)
Definition: scansup.c:46

References downcase_identifier(), ident, and len.

Referenced by DecodeTimezoneName(), extract_date(), find_provider(), interval_part_common(), interval_trunc(), SplitIdentifierString(), time_part_common(), timestamp_part_common(), timestamp_trunc(), timestamptz_part_common(), timestamptz_trunc_internal(), and timetz_part_common().

◆ scanner_isspace()

bool scanner_isspace ( char  ch )

Definition at line 117 of file scansup.c.

118{
119 /* This must match scan.l's list of {space} characters */
120 if (ch == ' ' ||
121 ch == '\t' ||
122 ch == '\n' ||
123 ch == '\r' ||
124 ch == '\v' ||
125 ch == '\f')
126 return true;
127 return false;
128}

Referenced by array_in(), array_out(), check_uescapechar(), CleanQuerytext(), CreateSchemaCommand(), from_char_seq_search(), get_val(), parse_hstore(), parse_ident(), parseNameAndArgTypes(), ReadArrayDimensions(), ReadArrayToken(), SplitDirectoriesString(), SplitGUCList(), and SplitIdentifierString().

◆ truncate_identifier()

void truncate_identifier ( char *  ident,
int  len,
bool  warn 
)

Definition at line 93 of file scansup.c.

94{
95 if (len >= NAMEDATALEN)
96 {
98 if (warn)
100 (errcode(ERRCODE_NAME_TOO_LONG),
101 errmsg("identifier \"%s\" will be truncated to \"%.*s\"",
102 ident, len, ident)));
103 ident[len] = '0円';
104 }
105}
int errcode(int sqlerrcode)
Definition: elog.c:854
int errmsg(const char *fmt,...)
Definition: elog.c:1071
#define NOTICE
Definition: elog.h:35
#define ereport(elevel,...)
Definition: elog.h:150
int pg_mbcliplen(const char *mbstr, int len, int limit)
Definition: mbutils.c:1084

References ereport, errcode(), errmsg(), ident, len, NAMEDATALEN, NOTICE, and pg_mbcliplen().

Referenced by base_yylex(), createNewConnection(), deleteConnection(), downcase_identifier(), get_connect_string(), getConnectionByName(), parse_and_validate_value(), and SplitIdentifierString().

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