commit 880256b8bfde746cd54993f3abcb4dc648895af7
parent a58fa45f25da4f18d7b8c1a815884f67b965406f
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date: Mon, 28 Mar 2022 18:36:20 +0200
compatibility: replace iscntrl with own ISCNTRL macro
It is unspecified if the C locale iscntrl is compatible with ASCII or not.
Noticed when testing on OpenBSD 3.8 which uses extended ASCII and also uses the
C1 range for control-characters. This breaks support with UTF-8.
Reference:
https://en.wikipedia.org/wiki/C0_and_C1_control_codes#C1_control_codes_for_general_use
C1 table.
Force an own definition of an ASCII-compatible control-character range since
sfeed expects input to be UTF-8 (or converted from iconv) and so output to be
UTF-8 aswell.
Diffstat:
4 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/sfeed.c b/sfeed.c
@@ -326,7 +326,7 @@ string_print_encoded(String *s)
case '\t': putchar('\\'); putchar('t'); break;
default:
/* ignore control chars */
- if (!iscntrl((unsigned char)*p))
+ if (!ISCNTRL((unsigned char)*p))
putchar(*p);
break;
}
@@ -343,7 +343,7 @@ printtrimmed(const char *s)
for (; *p && p != e; p++) {
if (isspace((unsigned char)*p))
putchar(' '); /* any whitespace to space */
- else if (!iscntrl((unsigned char)*p))
+ else if (!ISCNTRL((unsigned char)*p))
/* ignore other control chars */
putchar(*p);
}
diff --git a/sfeed_opml_import.c b/sfeed_opml_import.c
@@ -12,7 +12,7 @@ static void
printsafe(const char *s)
{
for (; *s; s++) {
- if (iscntrl((unsigned char)*s))
+ if (ISCNTRL((unsigned char)*s))
continue;
else if (*s == '\\')
fputs("\\\\", stdout);
diff --git a/sfeed_web.c b/sfeed_web.c
@@ -16,7 +16,7 @@ static void
printvalue(const char *s)
{
for (; *s; s++)
- if (!iscntrl((unsigned char)*s))
+ if (!ISCNTRL((unsigned char)*s))
putchar(*s);
}
diff --git a/util.h b/util.h
@@ -8,6 +8,9 @@
#define unveil(p1,p2) 0
#endif
+/* control-character in the ASCII range 0-127: compatible with UTF-8 */
+#define ISCNTRL(c) ((c) < ' ' || (c) == 0x7f)
+
#undef strcasestr
char *strcasestr(const char *, const char *);
#undef strlcat