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-rw-r--r--src/backend/utils/adt/oid.c468
1 files changed, 468 insertions, 0 deletions
diff --git a/src/backend/utils/adt/oid.c b/src/backend/utils/adt/oid.c
new file mode 100644
index 0000000..7de31d7
--- /dev/null
+++ b/src/backend/utils/adt/oid.c
@@ -0,0 +1,468 @@
+/*-------------------------------------------------------------------------
+ *
+ * oid.c
+ * Functions for the built-in type Oid ... also oidvector.
+ *
+ * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ *
+ * IDENTIFICATION
+ * src/backend/utils/adt/oid.c
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include <ctype.h>
+#include <limits.h>
+
+#include "catalog/pg_type.h"
+#include "libpq/pqformat.h"
+#include "nodes/value.h"
+#include "utils/array.h"
+#include "utils/builtins.h"
+
+
+#define OidVectorSize(n) (offsetof(oidvector, values) + (n) * sizeof(Oid))
+
+
+/*****************************************************************************
+ * USER I/O ROUTINES *
+ *****************************************************************************/
+
+static Oid
+oidin_subr(const char *s, char **endloc)
+{
+ unsigned long cvt;
+ char *endptr;
+ Oid result;
+
+ if (*s == '\0')
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
+ errmsg("invalid input syntax for type %s: \"%s\"",
+ "oid", s)));
+
+ errno = 0;
+ cvt = strtoul(s, &endptr, 10);
+
+ /*
+ * strtoul() normally only sets ERANGE. On some systems it also may set
+ * EINVAL, which simply means it couldn't parse the input string. This is
+ * handled by the second "if" consistent across platforms.
+ */
+ if (errno && errno != ERANGE && errno != EINVAL)
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
+ errmsg("invalid input syntax for type %s: \"%s\"",
+ "oid", s)));
+
+ if (endptr == s && *s != '\0')
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
+ errmsg("invalid input syntax for type %s: \"%s\"",
+ "oid", s)));
+
+ if (errno == ERANGE)
+ ereport(ERROR,
+ (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
+ errmsg("value \"%s\" is out of range for type %s",
+ s, "oid")));
+
+ if (endloc)
+ {
+ /* caller wants to deal with rest of string */
+ *endloc = endptr;
+ }
+ else
+ {
+ /* allow only whitespace after number */
+ while (*endptr && isspace((unsigned char) *endptr))
+ endptr++;
+ if (*endptr)
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
+ errmsg("invalid input syntax for type %s: \"%s\"",
+ "oid", s)));
+ }
+
+ result = (Oid) cvt;
+
+ /*
+ * Cope with possibility that unsigned long is wider than Oid, in which
+ * case strtoul will not raise an error for some values that are out of
+ * the range of Oid.
+ *
+ * For backwards compatibility, we want to accept inputs that are given
+ * with a minus sign, so allow the input value if it matches after either
+ * signed or unsigned extension to long.
+ *
+ * To ensure consistent results on 32-bit and 64-bit platforms, make sure
+ * the error message is the same as if strtoul() had returned ERANGE.
+ */
+#if OID_MAX != ULONG_MAX
+ if (cvt != (unsigned long) result &&
+ cvt != (unsigned long) ((int) result))
+ ereport(ERROR,
+ (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
+ errmsg("value \"%s\" is out of range for type %s",
+ s, "oid")));
+#endif
+
+ return result;
+}
+
+Datum
+oidin(PG_FUNCTION_ARGS)
+{
+ char *s = PG_GETARG_CSTRING(0);
+ Oid result;
+
+ result = oidin_subr(s, NULL);
+ PG_RETURN_OID(result);
+}
+
+Datum
+oidout(PG_FUNCTION_ARGS)
+{
+ Oid o = PG_GETARG_OID(0);
+ char *result = (char *) palloc(12);
+
+ snprintf(result, 12, "%u", o);
+ PG_RETURN_CSTRING(result);
+}
+
+/*
+ * oidrecv - converts external binary format to oid
+ */
+Datum
+oidrecv(PG_FUNCTION_ARGS)
+{
+ StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
+
+ PG_RETURN_OID((Oid) pq_getmsgint(buf, sizeof(Oid)));
+}
+
+/*
+ * oidsend - converts oid to binary format
+ */
+Datum
+oidsend(PG_FUNCTION_ARGS)
+{
+ Oid arg1 = PG_GETARG_OID(0);
+ StringInfoData buf;
+
+ pq_begintypsend(&buf);
+ pq_sendint32(&buf, arg1);
+ PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
+}
+
+/*
+ * construct oidvector given a raw array of Oids
+ *
+ * If oids is NULL then caller must fill values[] afterward
+ */
+oidvector *
+buildoidvector(const Oid *oids, int n)
+{
+ oidvector *result;
+
+ result = (oidvector *) palloc0(OidVectorSize(n));
+
+ if (n > 0 && oids)
+ memcpy(result->values, oids, n * sizeof(Oid));
+
+ /*
+ * Attach standard array header. For historical reasons, we set the index
+ * lower bound to 0 not 1.
+ */
+ SET_VARSIZE(result, OidVectorSize(n));
+ result->ndim = 1;
+ result->dataoffset = 0; /* never any nulls */
+ result->elemtype = OIDOID;
+ result->dim1 = n;
+ result->lbound1 = 0;
+
+ return result;
+}
+
+/*
+ * oidvectorin - converts "num num ..." to internal form
+ */
+Datum
+oidvectorin(PG_FUNCTION_ARGS)
+{
+ char *oidString = PG_GETARG_CSTRING(0);
+ oidvector *result;
+ int nalloc;
+ int n;
+
+ nalloc = 32; /* arbitrary initial size guess */
+ result = (oidvector *) palloc0(OidVectorSize(nalloc));
+
+ for (n = 0;; n++)
+ {
+ while (*oidString && isspace((unsigned char) *oidString))
+ oidString++;
+ if (*oidString == '\0')
+ break;
+
+ if (n >= nalloc)
+ {
+ nalloc *= 2;
+ result = (oidvector *) repalloc(result, OidVectorSize(nalloc));
+ }
+
+ result->values[n] = oidin_subr(oidString, &oidString);
+ }
+
+ SET_VARSIZE(result, OidVectorSize(n));
+ result->ndim = 1;
+ result->dataoffset = 0; /* never any nulls */
+ result->elemtype = OIDOID;
+ result->dim1 = n;
+ result->lbound1 = 0;
+
+ PG_RETURN_POINTER(result);
+}
+
+/*
+ * oidvectorout - converts internal form to "num num ..."
+ */
+Datum
+oidvectorout(PG_FUNCTION_ARGS)
+{
+ oidvector *oidArray = (oidvector *) PG_GETARG_POINTER(0);
+ int num,
+ nnums = oidArray->dim1;
+ char *rp;
+ char *result;
+
+ /* assumes sign, 10 digits, ' ' */
+ rp = result = (char *) palloc(nnums * 12 + 1);
+ for (num = 0; num < nnums; num++)
+ {
+ if (num != 0)
+ *rp++ = ' ';
+ sprintf(rp, "%u", oidArray->values[num]);
+ while (*++rp != '\0')
+ ;
+ }
+ *rp = '\0';
+ PG_RETURN_CSTRING(result);
+}
+
+/*
+ * oidvectorrecv - converts external binary format to oidvector
+ */
+Datum
+oidvectorrecv(PG_FUNCTION_ARGS)
+{
+ LOCAL_FCINFO(locfcinfo, 3);
+ StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
+ oidvector *result;
+
+ /*
+ * Normally one would call array_recv() using DirectFunctionCall3, but
+ * that does not work since array_recv wants to cache some data using
+ * fcinfo->flinfo->fn_extra. So we need to pass it our own flinfo
+ * parameter.
+ */
+ InitFunctionCallInfoData(*locfcinfo, fcinfo->flinfo, 3,
+ InvalidOid, NULL, NULL);
+
+ locfcinfo->args[0].value = PointerGetDatum(buf);
+ locfcinfo->args[0].isnull = false;
+ locfcinfo->args[1].value = ObjectIdGetDatum(OIDOID);
+ locfcinfo->args[1].isnull = false;
+ locfcinfo->args[2].value = Int32GetDatum(-1);
+ locfcinfo->args[2].isnull = false;
+
+ result = (oidvector *) DatumGetPointer(array_recv(locfcinfo));
+
+ Assert(!locfcinfo->isnull);
+
+ /* sanity checks: oidvector must be 1-D, 0-based, no nulls */
+ if (ARR_NDIM(result) != 1 ||
+ ARR_HASNULL(result) ||
+ ARR_ELEMTYPE(result) != OIDOID ||
+ ARR_LBOUND(result)[0] != 0)
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_BINARY_REPRESENTATION),
+ errmsg("invalid oidvector data")));
+
+ PG_RETURN_POINTER(result);
+}
+
+/*
+ * oidvectorsend - converts oidvector to binary format
+ */
+Datum
+oidvectorsend(PG_FUNCTION_ARGS)
+{
+ return array_send(fcinfo);
+}
+
+/*
+ * oidparse - get OID from ICONST/FCONST node
+ */
+Oid
+oidparse(Node *node)
+{
+ switch (nodeTag(node))
+ {
+ case T_Integer:
+ return intVal(node);
+ case T_Float:
+
+ /*
+ * Values too large for int4 will be represented as Float
+ * constants by the lexer. Accept these if they are valid OID
+ * strings.
+ */
+ return oidin_subr(castNode(Float, node)->fval, NULL);
+ default:
+ elog(ERROR, "unrecognized node type: %d", (int) nodeTag(node));
+ }
+ return InvalidOid; /* keep compiler quiet */
+}
+
+/* qsort comparison function for Oids */
+int
+oid_cmp(const void *p1, const void *p2)
+{
+ Oid v1 = *((const Oid *) p1);
+ Oid v2 = *((const Oid *) p2);
+
+ if (v1 < v2)
+ return -1;
+ if (v1 > v2)
+ return 1;
+ return 0;
+}
+
+
+/*****************************************************************************
+ * PUBLIC ROUTINES *
+ *****************************************************************************/
+
+Datum
+oideq(PG_FUNCTION_ARGS)
+{
+ Oid arg1 = PG_GETARG_OID(0);
+ Oid arg2 = PG_GETARG_OID(1);
+
+ PG_RETURN_BOOL(arg1 == arg2);
+}
+
+Datum
+oidne(PG_FUNCTION_ARGS)
+{
+ Oid arg1 = PG_GETARG_OID(0);
+ Oid arg2 = PG_GETARG_OID(1);
+
+ PG_RETURN_BOOL(arg1 != arg2);
+}
+
+Datum
+oidlt(PG_FUNCTION_ARGS)
+{
+ Oid arg1 = PG_GETARG_OID(0);
+ Oid arg2 = PG_GETARG_OID(1);
+
+ PG_RETURN_BOOL(arg1 < arg2);
+}
+
+Datum
+oidle(PG_FUNCTION_ARGS)
+{
+ Oid arg1 = PG_GETARG_OID(0);
+ Oid arg2 = PG_GETARG_OID(1);
+
+ PG_RETURN_BOOL(arg1 <= arg2);
+}
+
+Datum
+oidge(PG_FUNCTION_ARGS)
+{
+ Oid arg1 = PG_GETARG_OID(0);
+ Oid arg2 = PG_GETARG_OID(1);
+
+ PG_RETURN_BOOL(arg1 >= arg2);
+}
+
+Datum
+oidgt(PG_FUNCTION_ARGS)
+{
+ Oid arg1 = PG_GETARG_OID(0);
+ Oid arg2 = PG_GETARG_OID(1);
+
+ PG_RETURN_BOOL(arg1 > arg2);
+}
+
+Datum
+oidlarger(PG_FUNCTION_ARGS)
+{
+ Oid arg1 = PG_GETARG_OID(0);
+ Oid arg2 = PG_GETARG_OID(1);
+
+ PG_RETURN_OID((arg1 > arg2) ? arg1 : arg2);
+}
+
+Datum
+oidsmaller(PG_FUNCTION_ARGS)
+{
+ Oid arg1 = PG_GETARG_OID(0);
+ Oid arg2 = PG_GETARG_OID(1);
+
+ PG_RETURN_OID((arg1 < arg2) ? arg1 : arg2);
+}
+
+Datum
+oidvectoreq(PG_FUNCTION_ARGS)
+{
+ int32 cmp = DatumGetInt32(btoidvectorcmp(fcinfo));
+
+ PG_RETURN_BOOL(cmp == 0);
+}
+
+Datum
+oidvectorne(PG_FUNCTION_ARGS)
+{
+ int32 cmp = DatumGetInt32(btoidvectorcmp(fcinfo));
+
+ PG_RETURN_BOOL(cmp != 0);
+}
+
+Datum
+oidvectorlt(PG_FUNCTION_ARGS)
+{
+ int32 cmp = DatumGetInt32(btoidvectorcmp(fcinfo));
+
+ PG_RETURN_BOOL(cmp < 0);
+}
+
+Datum
+oidvectorle(PG_FUNCTION_ARGS)
+{
+ int32 cmp = DatumGetInt32(btoidvectorcmp(fcinfo));
+
+ PG_RETURN_BOOL(cmp <= 0);
+}
+
+Datum
+oidvectorge(PG_FUNCTION_ARGS)
+{
+ int32 cmp = DatumGetInt32(btoidvectorcmp(fcinfo));
+
+ PG_RETURN_BOOL(cmp >= 0);
+}
+
+Datum
+oidvectorgt(PG_FUNCTION_ARGS)
+{
+ int32 cmp = DatumGetInt32(btoidvectorcmp(fcinfo));
+
+ PG_RETURN_BOOL(cmp > 0);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-23 22:32:43 +0000