Move strtoint() to common

Several places used similar code to convert a string to an int, so take
the function that we already had and make it globally available.
Reviewed-by: Michael Paquier <michael@paquier.xyz>

src/backend/nodes/read.c

@@ -21,6 +21,7 @@
 
 #include <ctype.h>
 
+#include "common/string.h"
 #include "nodes/pg_list.h"
 #include "nodes/readfuncs.h"
 #include "nodes/value.h"
@@ -215,18 +216,15 @@ nodeTokenType(char *token, int length)
 	{
 		/*
 		 * Yes.  Figure out whether it is integral or float; this requires
-		 * both a syntax check and a range check. strtol() can do both for us.
-		 * We know the token will end at a character that strtol will stop at,
+		 * both a syntax check and a range check. strtoint() can do both for us.
+		 * We know the token will end at a character that strtoint will stop at,
 		 * so we do not need to modify the string.
 		 */
-		long		val;
 		char	   *endptr;
 
 		errno = 0;
-		val = strtol(token, &endptr, 10);
-		if (endptr != token + length || errno == ERANGE ||
-			/* check for overflow of int */
-			val != (int) val)
+		(void) strtoint(token, &endptr, 10);
+		if (endptr != token + length || errno == ERANGE)
 			return T_Float;
 		return T_Integer;
 	}

src/backend/parser/scan.l

@@ -34,6 +34,7 @@
 #include <ctype.h>
 #include <unistd.h>
 
+#include "common/string.h"
 #include "parser/gramparse.h"
 #include "parser/parser.h"		/* only needed for GUC variables */
 #include "parser/scansup.h"
@@ -1211,14 +1212,12 @@ litbufdup(core_yyscan_t yyscanner)
 static int
 process_integer_literal(const char *token, YYSTYPE *lval)
 {
-	long		val;
+	int			val;
 	char	   *endptr;
 
 	errno = 0;
-	val = strtol(token, &endptr, 10);
-	if (*endptr != '\0' || errno == ERANGE ||
-		/* check for overflow of int */
-		val != (int) val)
+	val = strtoint(token, &endptr, 10);
+	if (*endptr != '\0' || errno == ERANGE)
 	{
 		/* integer too large, treat it as a float */
 		lval->str = pstrdup(token);

src/backend/utils/adt/datetime.c

@@ -22,6 +22,7 @@
 #include "access/htup_details.h"
 #include "access/xact.h"
 #include "catalog/pg_type.h"
+#include "common/string.h"
 #include "funcapi.h"
 #include "miscadmin.h"
 #include "nodes/nodeFuncs.h"
@@ -251,23 +252,6 @@ static const datetkn *deltacache[MAXDATEFIELDS] = {NULL};
 static const datetkn *abbrevcache[MAXDATEFIELDS] = {NULL};
 
 
-/*
- * strtoint --- just like strtol, but returns int not long
- */
-static int
-strtoint(const char *nptr, char **endptr, int base)
-{
-	long		val;
-
-	val = strtol(nptr, endptr, base);
-#ifdef HAVE_LONG_INT_64
-	if (val != (long) ((int32) val))
-		errno = ERANGE;
-#endif
-	return (int) val;
-}
-
-
 /*
  * Calendar time to Julian date conversions.
  * Julian date is commonly used in astronomical applications,

src/common/string.c

@@ -41,3 +41,18 @@ pg_str_endswith(const char *str, const char *end)
 	str += slen - elen;
 	return strcmp(str, end) == 0;
 }
+
+
+/*
+ * strtoint --- just like strtol, but returns int not long
+ */
+int
+strtoint(const char *restrict str, char **restrict endptr, int base)
+{
+	long		val;
+
+	val = strtol(str, endptr, base);
+	if (val != (int) val)
+		errno = ERANGE;
+	return (int) val;
+}

src/include/common/string.h

@@ -11,5 +11,6 @@
 #define COMMON_STRING_H
 
 extern bool pg_str_endswith(const char *str, const char *end);
+extern int strtoint(const char *restrict str, char **restrict endptr, int base);
 
 #endif							/* COMMON_STRING_H */

src/interfaces/ecpg/pgtypeslib/.gitignore

@@ -4,4 +4,5 @@
 /pgstrcasecmp.c
 /rint.c
 /snprintf.c
+/string.c
 /strnlen.c

src/interfaces/ecpg/pgtypeslib/Makefile

@@ -32,6 +32,7 @@ SHLIB_EXPORTS = exports.txt
 OBJS= numeric.o datetime.o common.o dt_common.o timestamp.o interval.o \
 	pgstrcasecmp.o \
 	$(filter rint.o snprintf.o strnlen.o, $(LIBOBJS)) \
+	string.o \
 	$(WIN32RES)
 
 all: all-lib
@@ -47,6 +48,9 @@ include $(top_srcdir)/src/Makefile.shlib
 pgstrcasecmp.c rint.c snprintf.c strnlen.c: % : $(top_srcdir)/src/port/%
 	rm -f $@ && $(LN_S) $< .
 
+string.c: % : $(top_srcdir)/src/common/%
+	rm -f $@ && $(LN_S) $< .
+
 install: all installdirs install-lib
 
 installdirs: installdirs-lib
@@ -54,6 +58,6 @@ installdirs: installdirs-lib
 uninstall: uninstall-lib
 
 clean distclean: clean-lib
-	rm -f $(OBJS) pgstrcasecmp.c rint.c snprintf.c strnlen.c
+	rm -f $(OBJS) pgstrcasecmp.c rint.c snprintf.c strnlen.c string.c
 
 maintainer-clean: distclean maintainer-clean-lib

src/interfaces/ecpg/pgtypeslib/interval.c

@@ -9,25 +9,13 @@
 #error -ffast-math is known to break this code
 #endif
 
+#include "common/string.h"
+
 #include "extern.h"
 #include "dt.h"
 #include "pgtypes_error.h"
 #include "pgtypes_interval.h"
 
-/* copy&pasted from .../src/backend/utils/adt/datetime.c */
-static int
-strtoint(const char *nptr, char **endptr, int base)
-{
-	long		val;
-
-	val = strtol(nptr, endptr, base);
-#ifdef HAVE_LONG_INT_64
-	if (val != (long) ((int32) val))
-		errno = ERANGE;
-#endif
-	return (int) val;
-}
-
 /* copy&pasted from .../src/backend/utils/adt/datetime.c
  * and changesd struct pg_tm to struct tm
  */

src/interfaces/ecpg/preproc/pgc.l

@@ -21,6 +21,8 @@
 #include <ctype.h>
 #include <limits.h>
 
+#include "common/string.h"
+
 #include "extern.h"
 #include "preproc.h"
 }
@@ -727,14 +729,12 @@ cppline			{space}*#([^i][A-Za-z]*|{if}|{ifdef}|{ifndef}|{import})((\/\*[^*/]*\*+
 						return PARAM;
 					}
 <C,SQL>{integer}	{
-						long val;
+						int val;
 						char* endptr;
 
 						errno = 0;
-						val = strtol((char *)yytext, &endptr,10);
-						if (*endptr != '\0' || errno == ERANGE ||
-							/* check for overflow of int */
-							val != (int) val)
+						val = strtoint(yytext, &endptr, 10);
+						if (*endptr != '\0' || errno == ERANGE)
 						{
 							errno = 0;
 							base_yylval.str = mm_strdup(yytext);