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hexdecoct: slightly extend the unbase64mem() API and related

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If the string length is specified as (size_t) -1, let's use that as
indicator for determining the length on our own. This makes it
slightlier shorter to invoke these APIs for a very common case.

Also, do some minor other coding style updates, and add assert()s here
and there.
This commit is contained in:
Lennart Poettering 2017-10-27 11:06:19 +02:00
parent 6bbfdc672b
commit ae6e414a61
1 changed files with 33 additions and 12 deletions
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45
src/basic/hexdecoct.c
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@ -96,7 +96,10 @@ int unhexmem(const char *p, size_t l, void **mem, size_t *len) {
assert(mem);
assert(len);
assert(p);
assert(p || l == 0);
if (l == (size_t) -1)
l = strlen(p);
if (l % 2 != 0)
return -EINVAL;
@ -160,6 +163,8 @@ char *base32hexmem(const void *p, size_t l, bool padding) {
const uint8_t *x;
size_t len;
assert(p || l == 0);
if (padding)
/* five input bytes makes eight output bytes, padding is added so we must round up */
len = 8 * (l + 4) / 5;
@ -269,7 +274,12 @@ int unbase32hexmem(const char *p, size_t l, bool padding, void **mem, size_t *_l
size_t len;
unsigned pad = 0;
assert(p);
assert(p || l == 0);
assert(mem);
assert(_len);
if (l == (size_t) -1)
l = strlen(p);
/* padding ensures any base32hex input has input divisible by 8 */
if (padding && l % 8 != 0)
@ -519,6 +529,9 @@ ssize_t base64mem(const void *p, size_t l, char **out) {
char *r, *z;
const uint8_t *x;
assert(p || l == 0);
assert(out);
/* three input bytes makes four output bytes, padding is added so we must round up */
z = r = malloc(4 * (l + 2) / 3 + 1);
if (!r)
@ -554,10 +567,11 @@ ssize_t base64mem(const void *p, size_t l, char **out) {
return z - r;
}
static int base64_append_width(char **prefix, int plen,
const char *sep, int indent,
const void *p, size_t l,
int width) {
static int base64_append_width(
char **prefix, int plen,
const char *sep, int indent,
const void *p, size_t l,
int width) {
_cleanup_free_ char *x = NULL;
char *t, *s;
@ -596,17 +610,18 @@ static int base64_append_width(char **prefix, int plen,
return 0;
}
int base64_append(char **prefix, int plen,
const void *p, size_t l,
int indent, int width) {
int base64_append(
char **prefix, int plen,
const void *p, size_t l,
int indent, int width) {
if (plen > width / 2 || plen + indent > width)
/* leave indent on the left, keep last column free */
return base64_append_width(prefix, plen, "\n", indent, p, l, width - indent - 1);
else
/* leave plen on the left, keep last column free */
return base64_append_width(prefix, plen, NULL, plen, p, l, width - plen - 1);
};
}
int unbase64mem(const char *p, size_t l, void **mem, size_t *_len) {
_cleanup_free_ uint8_t *r = NULL;
@ -615,7 +630,12 @@ int unbase64mem(const char *p, size_t l, void **mem, size_t *_len) {
const char *x;
size_t len;
assert(p);
assert(p || l == 0);
assert(mem);
assert(_len);
if (l == (size_t) -1)
l = strlen(p);
/* padding ensures any base63 input has input divisible by 4 */
if (l % 4 != 0)
@ -659,6 +679,7 @@ int unbase64mem(const char *p, size_t l, void **mem, size_t *_len) {
}
switch (l % 4) {
case 3:
a = unbase64char(x[0]);
if (a < 0)