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Use C-style backslash escaping to sanitize non-UTF-8 strings.
The functions are compatible with glib's g_strcompress() and
g_strescape().
The difference is only that g_strescape() escapes all non-printable,
non ASCII character as well, while nm_utils_str_utf8safe_escape()
-- depending on the flags -- preserves valid UTF-8 sequence except
backslash.
The flags allow to optionally escape ASCII control characters and
all non-ASCII (valid UTF-8) characters. But the option to preserve
valid UTF-8 (non-ASCII) characters verbatim, is what distinguishes
from g_strescape().
(cherry picked from commit
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| .. | ||
| gsystem-local-alloc.h | ||
| nm-glib.h | ||
| nm-macros-internal.h | ||
| nm-shared-utils.c | ||
| nm-shared-utils.h | ||
| nm-test-utils.h | ||
| nm-udev-utils.c | ||
| nm-udev-utils.h | ||
| nm-vpn-editor-plugin-call.h | ||
| nm-vpn-plugin-macros.h | ||
| nm-vpn-plugin-utils.c | ||
| nm-vpn-plugin-utils.h | ||
| unaligned.h | ||