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common: rename bech32_encode parameter

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s/max_input_len/max_output_len

This maximum length applies to the output parameter, not the data
parameter. Thus it is more intuitive to name it max_output_len.
This commit is contained in:
Matt Morehouse
2023-05-05 16:09:23 -05:00
committed by Rusty Russell
parent eec30b1847
commit 513bd29330
2 changed files with 4 additions and 4 deletions
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4
common/bech32.c
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@@ -55,7 +55,7 @@ const int8_t bech32_charset_rev[128] = {
1, 0, 3, 16, 11, 28, 12, 14, 6, 4, 2, -1, -1, -1, -1, -1
};
int bech32_encode(char *output, const char *hrp, const uint8_t *data, size_t data_len, size_t max_input_len, bech32_encoding enc) {
int bech32_encode(char *output, const char *hrp, const uint8_t *data, size_t data_len, size_t max_output_len, bech32_encoding enc) {
uint32_t chk = 1;
size_t i = 0;
while (hrp[i] != 0) {
@@ -68,7 +68,7 @@ int bech32_encode(char *output, const char *hrp, const uint8_t *data, size_t dat
chk = bech32_polymod_step(chk) ^ (ch >> 5);
++i;
}
if (i + 7 + data_len > max_input_len) return 0;
if (i + 7 + data_len > max_output_len) return 0;
chk = bech32_polymod_step(chk);
while (*hrp != 0) {
chk = bech32_polymod_step(chk) ^ (*hrp & 0x1f);

4
common/bech32.h
View File

@@ -83,7 +83,7 @@ typedef enum {
* In: hrp : Pointer to the null-terminated human readable part.
* data : Pointer to an array of 5-bit values.
* data_len: Length of the data array.
* max_input_len: Maximum valid length of input (90 for segwit usage).
* max_output_len: Maximum valid length of output (90 for segwit usage).
* enc: Which encoding to use (BECH32_ENCODING_BECH32{,M}).
* Returns 1 if successful.
*/
@@ -92,7 +92,7 @@ int bech32_encode(
const char *hrp,
const uint8_t *data,
size_t data_len,
size_t max_input_len,
size_t max_output_len,
bech32_encoding enc
);