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Add strict parameter to u32_from_BE

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This commit is contained in:
pscott
2021-04-21 17:07:16 +02:00
parent 81ec019242
commit dafdc404ac
5 changed files with 13 additions and 9 deletions
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8
src/utils.c
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@@ -54,7 +54,8 @@ int local_strchr(char *string, char ch) {
}
// Almost like U4BE except that it takes `size` as a parameter.
uint32_t u32_from_BE(uint8_t *in, uint8_t size) {
// The `strict` parameter defines whether we should throw in case of a length > 4.
uint32_t u32_from_BE(uint8_t *in, uint8_t size, bool strict) {
uint32_t res = 0;
if (size == 1) {
res = in[0];
@@ -62,8 +63,11 @@ uint32_t u32_from_BE(uint8_t *in, uint8_t size) {
res = (in[0] << 8) | in[1];
} else if (size == 3) {
res = (in[0] << 16) | (in[1] << 8) | in[2];
} else {
} else if (size == 4) {
res = (in[0] << 24) | (in[1] << 16) | (in[2] << 8) | in[3];
} else if (strict && size != 0) {
PRINTF("Unexpected format\n");
THROW(EXCEPTION);
}
return res;
}

2
src/utils.h
View File

@@ -32,7 +32,7 @@ int local_strchr(char* string, char ch);
void u32_to_str(char* dest, uint8_t dest_size, uint32_t in);
// Converts a list of bytes (in BE) of length `size` to a uint32_t.
uint32_t u32_from_BE(uint8_t* in, uint8_t size);
uint32_t u32_from_BE(uint8_t* in, uint8_t size, bool strict);
void amountToString(uint8_t* amount,
uint8_t amount_len,