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fix max

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This commit is contained in:
J. Nick Koston
2025-12-27 14:57:42 -10:00
parent 61970bd1de
commit 4d4498e81f
1 changed files with 3 additions and 3 deletions
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6
esphome/core/helpers.cpp
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@@ -312,10 +312,10 @@ char *format_hex_pretty_to(char *buffer, size_t buffer_size, const uint8_t *data
buffer[0] = '\0';
return buffer;
}
// With separator: each byte needs 3 chars (XX + sep), last byte needs 2 + null = length*3
// Without separator: each byte needs 2 chars + null = length*2 + 1
// With separator: total length is 3*length (2*length hex chars, (length-1) separators, 1 null terminator)
// Without separator: total length is 2*length + 1 (2*length hex chars, 1 null terminator)
uint8_t stride = separator ? 3 : 2;
size_t max_bytes = (buffer_size - 1) / stride + (separator ? 1 : 0);
size_t max_bytes = separator ? (buffer_size / stride) : ((buffer_size - 1) / stride);
if (max_bytes == 0) {
buffer[0] = '\0';
return buffer;