Remove pg_atoi()

The last caller was int2vectorin(), and having such a general function
for one user didn't seem useful, so just put the required parts inline
and remove the function.

Reviewed-by: John Naylor <john.naylor@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/b239564c-cad0-b23e-c57e-166d883cb97d@enterprisedb.com

src/backend/utils/adt/int.c

@@ -146,15 +146,39 @@ int2vectorin(PG_FUNCTION_ARGS)
 
 	result = (int2vector *) palloc0(Int2VectorSize(FUNC_MAX_ARGS));
 
-	for (n = 0; *intString && n < FUNC_MAX_ARGS; n++)
+	for (n = 0; n < FUNC_MAX_ARGS; n++)
 	{
+		long		l;
+		char	   *endp;
+
 		while (*intString && isspace((unsigned char) *intString))
 			intString++;
 		if (*intString == '\0')
 			break;
-		result->values[n] = pg_atoi(intString, sizeof(int16), ' ');
-		while (*intString && !isspace((unsigned char) *intString))
-			intString++;
+
+		errno = 0;
+		l = strtol(intString, &endp, 10);
+
+		if (intString == endp)
+			ereport(ERROR,
+					(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
+					 errmsg("invalid input syntax for type %s: \"%s\"",
+							"smallint", intString)));
+
+		if (errno == ERANGE || l < SHRT_MIN || l > SHRT_MAX)
+			ereport(ERROR,
+					(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
+					 errmsg("value \"%s\" is out of range for type %s", intString,
+							"smallint")));
+
+		if (*endp && *endp != ' ')
+			ereport(ERROR,
+					(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
+					 errmsg("invalid input syntax for type %s: \"%s\"",
+							"integer", intString)));
+
+		result->values[n] = l;
+		intString = endp;
 	}
 	while (*intString && isspace((unsigned char) *intString))
 		intString++;

src/backend/utils/adt/numutils.c

@@ -85,94 +85,6 @@ decimalLength64(const uint64 v)
 	return t + (v >= PowersOfTen[t]);
 }
 
-/*
- * pg_atoi: convert string to integer
- *
- * allows any number of leading or trailing whitespace characters.
- *
- * 'size' is the sizeof() the desired integral result (1, 2, or 4 bytes).
- *
- * c, if not 0, is a terminator character that may appear after the
- * integer (plus whitespace).  If 0, the string must end after the integer.
- *
- * Unlike plain atoi(), this will throw ereport() upon bad input format or
- * overflow.
- */
-int32
-pg_atoi(const char *s, int size, int c)
-{
-	long		l;
-	char	   *badp;
-
-	/*
-	 * Some versions of strtol treat the empty string as an error, but some
-	 * seem not to.  Make an explicit test to be sure we catch it.
-	 */
-	if (s == NULL)
-		elog(ERROR, "NULL pointer");
-	if (*s == 0)
-		ereport(ERROR,
-				(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
-				 errmsg("invalid input syntax for type %s: \"%s\"",
-						"integer", s)));
-
-	errno = 0;
-	l = strtol(s, &badp, 10);
-
-	/* We made no progress parsing the string, so bail out */
-	if (s == badp)
-		ereport(ERROR,
-				(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
-				 errmsg("invalid input syntax for type %s: \"%s\"",
-						"integer", s)));
-
-	switch (size)
-	{
-		case sizeof(int32):
-			if (errno == ERANGE
-#if defined(HAVE_LONG_INT_64)
-			/* won't get ERANGE on these with 64-bit longs... */
-				|| l < INT_MIN || l > INT_MAX
-#endif
-				)
-				ereport(ERROR,
-						(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
-						 errmsg("value \"%s\" is out of range for type %s", s,
-								"integer")));
-			break;
-		case sizeof(int16):
-			if (errno == ERANGE || l < SHRT_MIN || l > SHRT_MAX)
-				ereport(ERROR,
-						(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
-						 errmsg("value \"%s\" is out of range for type %s", s,
-								"smallint")));
-			break;
-		case sizeof(int8):
-			if (errno == ERANGE || l < SCHAR_MIN || l > SCHAR_MAX)
-				ereport(ERROR,
-						(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
-						 errmsg("value \"%s\" is out of range for 8-bit integer", s)));
-			break;
-		default:
-			elog(ERROR, "unsupported result size: %d", size);
-	}
-
-	/*
-	 * Skip any trailing whitespace; if anything but whitespace remains before
-	 * the terminating character, bail out
-	 */
-	while (*badp && *badp != c && isspace((unsigned char) *badp))
-		badp++;
-
-	if (*badp && *badp != c)
-		ereport(ERROR,
-				(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
-				 errmsg("invalid input syntax for type %s: \"%s\"",
-						"integer", s)));
-
-	return (int32) l;
-}
-
 /*
  * Convert input string to a signed 16 bit integer.
  *

src/include/utils/builtins.h

@@ -43,7 +43,6 @@ extern void namestrcpy(Name name, const char *str);
 extern int	namestrcmp(Name name, const char *str);
 
 /* numutils.c */
-extern int32 pg_atoi(const char *s, int size, int c);
 extern int16 pg_strtoint16(const char *s);
 extern int32 pg_strtoint32(const char *s);
 extern int64 pg_strtoint64(const char *s);