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Be more careful about signed vs. unsigned char

The buildfarm has reminded me that not all systems consider char to besigned and we need to be explicit. Adjust the various bits of mac8.cfor what we intend, mostly using casts to unsigned char as suggested byTom, and adjust the tests for valid input accordingly. Explicitly makethe hexlookup table signed as it's useful to use -1 there to indicate aninvalid value.

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+14

-14

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src/backend/utils/adt
- mac8.c

1 file changed

+14

-14

lines changed

`‎src/backend/utils/adt/mac8.c`

Lines changed: 14 additions & 14 deletions

Original file line number	Diff line number	Diff line change
`@@ -35,9 +35,9 @@`
`35`	`35`	`#definelobits(addr) \`
`36`	`36`	`((unsigned long)(((addr)->e<<24) \| ((addr)->f<<16) \| ((addr)->g<<8) \| ((addr)->h)))`
`37`	`37`
`38`		`-staticunsignedcharhex2_to_uchar(constcharstr,constcharptr);`
	`38`	`+staticunsignedcharhex2_to_uchar(constunsignedcharstr,constunsignedcharptr);`
`39`	`39`
`40`		`-staticconstcharhexlookup[128]= {`
	`40`	`+staticconstsignedcharhexlookup[128]= {`
`41`	`41`	`-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,`
`42`	`42`	`-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,`
`43`	`43`	`-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,`
`@@ -58,16 +58,16 @@ static const char hexlookup[128] = {`
`58`	`58`	`* the entire string, which is used only for error reporting.`
`59`	`59`	`*/`
`60`	`60`	`staticinlineunsignedchar`
`61`		`-hex2_to_uchar(constcharptr,constcharstr)`
	`61`	`+hex2_to_uchar(constunsignedcharptr,constunsignedcharstr)`
`62`	`62`	`{`
`63`	`63`	`unsignedcharret=0;`
`64`		`-charlookup;`
	`64`	`+signedcharlookup;`
`65`	`65`
`66`	`66`	`/* Handle the first character */`
`67`		`-if (*ptr<0)`
	`67`	`+if (*ptr>127)`
`68`	`68`	`gotoinvalid_input;`
`69`	`69`
`70`		`-lookup=hexlookup[(unsignedchar)*ptr];`
	`70`	`+lookup=hexlookup[*ptr];`
`71`	`71`	`if (lookup<0)`
`72`	`72`	`gotoinvalid_input;`
`73`	`73`
`@@ -76,10 +76,10 @@ hex2_to_uchar(const char ptr, const char str)`
`76`	`76`	`/* Move to the second character */`
`77`	`77`	`ptr++;`
`78`	`78`
`79`		`-if (*ptr<0)`
	`79`	`+if (*ptr>127)`
`80`	`80`	`gotoinvalid_input;`
`81`	`81`
`82`		`-lookup=hexlookup[(unsignedchar)*ptr];`
	`82`	`+lookup=hexlookup[*ptr];`
`83`	`83`	`if (lookup<0)`
`84`	`84`	`gotoinvalid_input;`
`85`	`85`
`@@ -103,8 +103,8 @@ hex2_to_uchar(const char ptr, const char str)`
`103`	`103`	`Datum`
`104`	`104`	`macaddr8_in(PG_FUNCTION_ARGS)`
`105`	`105`	`{`
`106`		`-constchar*str=PG_GETARG_CSTRING(0);`
`107`		`-constchar*ptr=str;`
	`106`	`+constunsignedcharstr= (unsignedchar)PG_GETARG_CSTRING(0);`
	`107`	`+constunsignedchar*ptr=str;`
`108`	`108`	`macaddr8*result;`
`109`	`109`	`unsignedchara=0,`
`110`	`110`	`b=0,`
`@@ -115,10 +115,10 @@ macaddr8_in(PG_FUNCTION_ARGS)`
`115`	`115`	`g=0,`
`116`	`116`	`h=0;`
`117`	`117`	`intcount=0;`
`118`		`-charspacer='\0';`
	`118`	`+unsignedcharspacer='\0';`
`119`	`119`
`120`	`120`	`/* skip leading spaces */`
`121`		`-while (ptr&&isspace((unsignedchar)ptr))`
	`121`	`+while (ptr&&isspace(ptr))`
`122`	`122`	`ptr++;`
`123`	`123`
`124`	`124`	`/* digits must always come in pairs */`
`@@ -191,9 +191,9 @@ macaddr8_in(PG_FUNCTION_ARGS)`
`191`	`191`	`/* allow trailing whitespace after if we have 6 or 8 bytes */`
`192`	`192`	`if (count==6\|\|count==8)`
`193`	`193`	`{`
`194`		`-if (isspace((unsignedchar)*ptr))`
	`194`	`+if (isspace(*ptr))`
`195`	`195`	`{`
`196`		`-while (++ptr&&isspace((unsignedchar)ptr));`
	`196`	`+while (++ptr&&isspace(ptr));`
`197`	`197`
`198`	`198`	`/* If we found a space and then non-space, it's invalid */`
`199`	`199`	`if (*ptr)`

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`‎src/backend/utils/adt/mac8.c`

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