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Properly handle negative number sizes

This commit is contained in:
MCUdude 2022-02-21 13:43:38 +01:00
parent fa706f0d01
commit a73567893b
1 changed files with 18 additions and 5 deletions
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23
src/term.c
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@ -401,13 +401,14 @@ static int cmd_write(PROGRAMMER * pgm, struct avrpart * p,
int32_t bytes_grown;
uint8_t size;
bool is_float;
bool is_signed;
// Data union
union {
float f;
int64_t ll;
uint8_t a[8];
};
} data = {.bytes_grown = 0, .size = 0, .is_float = false, .ll = 0};
} data = {.bytes_grown = 0, .size = 0, .is_float = false, .ll = 0, .is_signed = false};
for (i = start_offset; i < len + start_offset - data.bytes_grown; i++) {
data.is_float = false;
@ -457,12 +458,12 @@ static int cmd_write(PROGRAMMER * pgm, struct avrpart * p,
}
}
}
// Print warning if data size might be ambiguous
bool is_hex = (strncmp(argv[i], "0x", 2) == 0);
bool is_neg_hex = (strncmp(argv[i], "-0x", 3) == 0);
bool leading_zero = (strncmp(argv[i], "0x0", 3) == 0);
int8_t hex_digits = (strlen(argv[i]) - 2);
if(!data.size // No pre-defined size
&& (is_neg_hex // Hex with - sign in front
|| (is_hex && leading_zero && (hex_digits & (hex_digits - 1))) // Hex with 3, 5, 6 or 7 digits
@ -471,9 +472,21 @@ static int cmd_write(PROGRAMMER * pgm, struct avrpart * p,
avrdude_message(MSG_INFO, "Warning: no size suffix specified for \"%s\". "
"Writing %d byte(s)\n",
argv[i],
llabs(data.ll) > 0xFFFFFFFF ? 8 :
llabs(data.ll) > 0x0000FFFF || data.is_float ? 4 : \
llabs(data.ll) > 0x000000FF ? 2 : 1);
llabs(data.ll) > UINT32_MAX ? 8 :
llabs(data.ll) > UINT16_MAX || data.is_float ? 4 : \
llabs(data.ll) > UINT8_MAX ? 2 : 1);
}
// Flag if signed integer and adjust size
if (data.ll < 0 && !data.is_float) {
data.is_signed = true;
if (data.ll < INT32_MIN)
data.size = 8;
else if (data.ll < INT16_MIN)
data.size = 4;
else if (data.ll < INT8_MIN)
data.size = 2;
else
data.size = 1;
}
}
buf[i - start_offset + data.bytes_grown] = data.a[0];