* uuid.c
* Functions for the built-in type "uuid".
*
- * Copyright (c) 2007, PostgreSQL Global Development Group
+ * Copyright (c) 2007-2014, PostgreSQL Global Development Group
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/utils/adt/uuid.c,v 1.4 2007/06/05 21:31:06 tgl Exp $
+ * src/backend/utils/adt/uuid.c
*
*-------------------------------------------------------------------------
*/
/* pg_uuid_t is declared to be struct pg_uuid_t in uuid.h */
struct pg_uuid_t
{
- unsigned char data[UUID_LEN];
+ unsigned char data[UUID_LEN];
};
static void string_to_uuid(const char *source, pg_uuid_t *uuid);
-static int uuid_internal_cmp(const pg_uuid_t *arg1, const pg_uuid_t *arg2);
+static int uuid_internal_cmp(const pg_uuid_t *arg1, const pg_uuid_t *arg2);
Datum
uuid_in(PG_FUNCTION_ARGS)
{
- char *uuid_str = PG_GETARG_CSTRING(0);
- pg_uuid_t *uuid;
+ char *uuid_str = PG_GETARG_CSTRING(0);
+ pg_uuid_t *uuid;
uuid = (pg_uuid_t *) palloc(sizeof(*uuid));
string_to_uuid(uuid_str, uuid);
Datum
uuid_out(PG_FUNCTION_ARGS)
{
- pg_uuid_t *uuid = PG_GETARG_UUID_P(0);
+ pg_uuid_t *uuid = PG_GETARG_UUID_P(0);
static const char hex_chars[] = "0123456789abcdef";
- StringInfoData buf;
- int i;
+ StringInfoData buf;
+ int i;
initStringInfo(&buf);
for (i = 0; i < UUID_LEN; i++)
{
- int hi;
- int lo;
+ int hi;
+ int lo;
/*
* We print uuid values as a string of 8, 4, 4, 4, and then 12
- * hexadecimal characters, with each group is separated by a
- * hyphen ("-"). Therefore, add the hyphens at the appropriate
- * places here.
+ * hexadecimal characters, with each group is separated by a hyphen
+ * ("-"). Therefore, add the hyphens at the appropriate places here.
*/
if (i == 4 || i == 6 || i == 8 || i == 10)
appendStringInfoChar(&buf, '-');
}
/*
- * We allow UUIDs in three input formats: 8x-4x-4x-4x-12x,
- * {8x-4x-4x-4x-12x}, and 32x, where "nx" means n hexadecimal digits
- * (only the first format is used for output). We convert the first
- * two formats into the latter format before further processing.
+ * We allow UUIDs as a series of 32 hexadecimal digits with an optional dash
+ * after each group of 4 hexadecimal digits, and optionally surrounded by {}.
+ * (The canonical format 8x-4x-4x-4x-12x, where "nx" means n hexadecimal
+ * digits, is the only one used for output.)
*/
static void
string_to_uuid(const char *source, pg_uuid_t *uuid)
{
- char hex_buf[32]; /* not NUL terminated */
- int i;
- int src_len;
+ const char *src = source;
+ bool braces = false;
+ int i;
- src_len = strlen(source);
- if (src_len != 32 && src_len != 36 && src_len != 38)
- goto syntax_error;
-
- if (src_len == 32)
- memcpy(hex_buf, source, src_len);
- else
+ if (src[0] == '{')
{
- const char *str = source;
-
- if (src_len == 38)
- {
- if (str[0] != '{' || str[37] != '}')
- goto syntax_error;
-
- str++; /* skip the first character */
- }
-
- if (str[8] != '-' || str[13] != '-' ||
- str[18] != '-' || str[23] != '-')
- goto syntax_error;
-
- memcpy(hex_buf, str, 8);
- memcpy(hex_buf + 8, str + 9, 4);
- memcpy(hex_buf + 12, str + 14, 4);
- memcpy(hex_buf + 16, str + 19, 4);
- memcpy(hex_buf + 20, str + 24, 12);
+ src++;
+ braces = true;
}
for (i = 0; i < UUID_LEN; i++)
{
- char str_buf[3];
+ char str_buf[3];
- memcpy(str_buf, &hex_buf[i * 2], 2);
+ if (src[0] == '\0' || src[1] == '\0')
+ goto syntax_error;
+ memcpy(str_buf, src, 2);
if (!isxdigit((unsigned char) str_buf[0]) ||
!isxdigit((unsigned char) str_buf[1]))
goto syntax_error;
str_buf[2] = '\0';
uuid->data[i] = (unsigned char) strtoul(str_buf, NULL, 16);
+ src += 2;
+ if (src[0] == '-' && (i % 2) == 1 && i < UUID_LEN - 1)
+ src++;
}
+ if (braces)
+ {
+ if (*src != '}')
+ goto syntax_error;
+ src++;
+ }
+
+ if (*src != '\0')
+ goto syntax_error;
+
return;
syntax_error:
- ereport(ERROR,
- (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
- errmsg("invalid input syntax for uuid: \"%s\"",
- source)));
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
+ errmsg("invalid input syntax for uuid: \"%s\"",
+ source)));
}
Datum
uuid_recv(PG_FUNCTION_ARGS)
{
- StringInfo buffer = (StringInfo) PG_GETARG_POINTER(0);
- pg_uuid_t *uuid;
+ StringInfo buffer = (StringInfo) PG_GETARG_POINTER(0);
+ pg_uuid_t *uuid;
uuid = (pg_uuid_t *) palloc(UUID_LEN);
memcpy(uuid->data, pq_getmsgbytes(buffer, UUID_LEN), UUID_LEN);
Datum
uuid_send(PG_FUNCTION_ARGS)
{
- pg_uuid_t *uuid = PG_GETARG_UUID_P(0);
- StringInfoData buffer;
+ pg_uuid_t *uuid = PG_GETARG_UUID_P(0);
+ StringInfoData buffer;
pq_begintypsend(&buffer);
pq_sendbytes(&buffer, (char *) uuid->data, UUID_LEN);
Datum
uuid_lt(PG_FUNCTION_ARGS)
{
- pg_uuid_t *arg1 = PG_GETARG_UUID_P(0);
- pg_uuid_t *arg2 = PG_GETARG_UUID_P(1);
+ pg_uuid_t *arg1 = PG_GETARG_UUID_P(0);
+ pg_uuid_t *arg2 = PG_GETARG_UUID_P(1);
PG_RETURN_BOOL(uuid_internal_cmp(arg1, arg2) < 0);
}
Datum
uuid_le(PG_FUNCTION_ARGS)
{
- pg_uuid_t *arg1 = PG_GETARG_UUID_P(0);
- pg_uuid_t *arg2 = PG_GETARG_UUID_P(1);
+ pg_uuid_t *arg1 = PG_GETARG_UUID_P(0);
+ pg_uuid_t *arg2 = PG_GETARG_UUID_P(1);
PG_RETURN_BOOL(uuid_internal_cmp(arg1, arg2) <= 0);
}
Datum
uuid_eq(PG_FUNCTION_ARGS)
{
- pg_uuid_t *arg1 = PG_GETARG_UUID_P(0);
- pg_uuid_t *arg2 = PG_GETARG_UUID_P(1);
+ pg_uuid_t *arg1 = PG_GETARG_UUID_P(0);
+ pg_uuid_t *arg2 = PG_GETARG_UUID_P(1);
PG_RETURN_BOOL(uuid_internal_cmp(arg1, arg2) == 0);
}
Datum
uuid_ge(PG_FUNCTION_ARGS)
{
- pg_uuid_t *arg1 = PG_GETARG_UUID_P(0);
- pg_uuid_t *arg2 = PG_GETARG_UUID_P(1);
+ pg_uuid_t *arg1 = PG_GETARG_UUID_P(0);
+ pg_uuid_t *arg2 = PG_GETARG_UUID_P(1);
PG_RETURN_BOOL(uuid_internal_cmp(arg1, arg2) >= 0);
}
Datum
uuid_gt(PG_FUNCTION_ARGS)
{
- pg_uuid_t *arg1 = PG_GETARG_UUID_P(0);
- pg_uuid_t *arg2 = PG_GETARG_UUID_P(1);
+ pg_uuid_t *arg1 = PG_GETARG_UUID_P(0);
+ pg_uuid_t *arg2 = PG_GETARG_UUID_P(1);
PG_RETURN_BOOL(uuid_internal_cmp(arg1, arg2) > 0);
}
Datum
uuid_ne(PG_FUNCTION_ARGS)
{
- pg_uuid_t *arg1 = PG_GETARG_UUID_P(0);
- pg_uuid_t *arg2 = PG_GETARG_UUID_P(1);
+ pg_uuid_t *arg1 = PG_GETARG_UUID_P(0);
+ pg_uuid_t *arg2 = PG_GETARG_UUID_P(1);
PG_RETURN_BOOL(uuid_internal_cmp(arg1, arg2) != 0);
}
Datum
uuid_cmp(PG_FUNCTION_ARGS)
{
- pg_uuid_t *arg1 = PG_GETARG_UUID_P(0);
- pg_uuid_t *arg2 = PG_GETARG_UUID_P(1);
+ pg_uuid_t *arg1 = PG_GETARG_UUID_P(0);
+ pg_uuid_t *arg2 = PG_GETARG_UUID_P(1);
PG_RETURN_INT32(uuid_internal_cmp(arg1, arg2));
}
Datum
uuid_hash(PG_FUNCTION_ARGS)
{
- pg_uuid_t *key = PG_GETARG_UUID_P(0);
+ pg_uuid_t *key = PG_GETARG_UUID_P(0);
+
return hash_any(key->data, UUID_LEN);
}
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