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shared: add nm_utils_strbuf_append_bin() helper

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Add a version of nm_utils_strbuf_append_*() that does not care
about NUL terminate strings, but accept any binary data. That makes
it useful for writing a binary buffer.
This commit is contained in:
Thomas Haller 2019-01-14 14:58:53 +01:00
parent cf30c9f07f
commit 694533f529
3 changed files with 116 additions and 4 deletions
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35
shared/nm-utils/nm-shared-utils.c
View file

@ -58,6 +58,41 @@ nm_utils_strbuf_append_c (char **buf, gsize *len, char c)
}
}
void
nm_utils_strbuf_append_bin (char **buf, gsize *len, gconstpointer str, gsize str_len)
{
switch (*len) {
case 0:
return;
case 1:
if (str_len == 0) {
(*buf)[0] = '\0';
return;
}
(*buf)[0] = '\0';
*len = 0;
(*buf)++;
return;
default:
if (str_len == 0) {
(*buf)[0] = '\0';
return;
}
if (str_len >= *len) {
memcpy (*buf, str, *len - 1);
(*buf)[*len - 1] = '\0';
*buf = &(*buf)[*len];
*len = 0;
} else {
memcpy (*buf, str, str_len);
*buf = &(*buf)[str_len];
(*buf)[0] = '\0';
*len -= str_len;
}
return;
}
}
void
nm_utils_strbuf_append_str (char **buf, gsize *len, const char *str)
{

1
shared/nm-utils/nm-shared-utils.h
View file

@ -342,6 +342,7 @@ _nm_utils_strbuf_init (char *buf, gsize len, char **p_buf_ptr, gsize *p_buf_len)
void nm_utils_strbuf_append (char **buf, gsize *len, const char *format, ...) _nm_printf (3, 4);
void nm_utils_strbuf_append_c (char **buf, gsize *len, char c);
void nm_utils_strbuf_append_str (char **buf, gsize *len, const char *str);
void nm_utils_strbuf_append_bin (char **buf, gsize *len, gconstpointer str, gsize str_len);
void nm_utils_strbuf_seek_end (char **buf, gsize *len);
const char *nm_strquote (char *buf, gsize buf_len, const char *str);

84
src/tests/test-general.c
View file

@ -1440,6 +1440,82 @@ test_nm_utils_strbuf_append (void)
char buf[NM_STRLEN (BUF_ORIG) + 1];
char str[NM_STRLEN (BUF_ORIG) + 1];
#define _strbuf_append(buf, len, format, ...) \
G_STMT_START { \
char **_buf = (buf); \
gsize *_len = (len); \
const char *_str_iter; \
gs_free char *_str = NULL; \
\
switch (nmtst_get_rand_int () % 4) { \
case 0: \
nm_utils_strbuf_append (_buf, _len, (format), __VA_ARGS__); \
break; \
case 1: \
_str = g_strdup_printf ((format), __VA_ARGS__); \
nm_utils_strbuf_append_str (_buf, _len, _str); \
break; \
case 2: \
_str = g_strdup_printf ((format), __VA_ARGS__); \
nm_utils_strbuf_append_bin (_buf, _len, _str, strlen (_str)); \
break; \
case 3: \
_str = g_strdup_printf ((format), __VA_ARGS__); \
if (!_str[0]) \
nm_utils_strbuf_append_str (_buf, _len, _str); \
for (_str_iter = _str; _str_iter[0]; _str_iter++) \
nm_utils_strbuf_append_c (_buf, _len, _str_iter[0]); \
break; \
} \
} G_STMT_END
#define _strbuf_append_str(buf, len, str) \
G_STMT_START { \
char **_buf = (buf); \
gsize *_len = (len); \
const char *_str = (str); \
\
switch (nmtst_get_rand_int () % 4) { \
case 0: \
nm_utils_strbuf_append (_buf, _len, "%s", _str ?: ""); \
break; \
case 1: \
nm_utils_strbuf_append_str (_buf, _len, _str); \
break; \
case 2: \
nm_utils_strbuf_append_bin (_buf, _len, _str, _str ? strlen (_str) : 0); \
break; \
case 3: \
if (!_str || !_str[0]) \
nm_utils_strbuf_append_str (_buf, _len, _str); \
for (; _str && _str[0]; _str++) \
nm_utils_strbuf_append_c (_buf, _len, _str[0]); \
break; \
} \
} G_STMT_END
#define _strbuf_append_c(buf, len, ch) \
G_STMT_START { \
char **_buf = (buf); \
gsize *_len = (len); \
char _ch = (ch); \
\
switch (nmtst_get_rand_int () % 4) { \
case 0: \
nm_utils_strbuf_append (_buf, _len, "%c", _ch); \
break; \
case 1: \
nm_utils_strbuf_append_str (_buf, _len, ((char[2]) { _ch, 0 })); \
break; \
case 2: \
nm_utils_strbuf_append_bin (_buf, _len, &_ch, 1); \
break; \
case 3: \
nm_utils_strbuf_append_c (_buf, _len, _ch); \
break; \
} \
} G_STMT_END
for (buf_len = 0; buf_len < 10; buf_len++) {
for (rep = 0; rep < 50; rep++) {
const int s_len = nmtst_get_rand_int () % (sizeof (str) - 5);
@ -1463,21 +1539,21 @@ test_nm_utils_strbuf_append (void)
switch (test_mode) {
case 0:
if (s_len == 1) {
nm_utils_strbuf_append_c (&t_buf, &t_len, str[0]);
_strbuf_append_c (&t_buf, &t_len, str[0]);
break;
}
/* fall through */
case 1:
nm_utils_strbuf_append_str (&t_buf, &t_len, str);
_strbuf_append_str (&t_buf, &t_len, str);
break;
case 2:
if (s_len == 1) {
nm_utils_strbuf_append (&t_buf, &t_len, "%c", str[0]);
_strbuf_append (&t_buf, &t_len, "%c", str[0]);
break;
}
/* fall through */
case 3:
nm_utils_strbuf_append (&t_buf, &t_len, "%s", str);
_strbuf_append (&t_buf, &t_len, "%s", str);
break;
case 4:
g_snprintf (t_buf, t_len, "%s", str);