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CONC-329: change pvio_*_blocking to return int to accomidate SOCKET_ERROR(-1)

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POWER and other architectures that define char(as my_bool) to be unsigned (as the C
standard leaves this undefined). This resulted in error branches being
unreachabe as indicated by the below compile warnings.

plugins/pvio/pvio_socket.c:763:42: warning: comparison of constant -1 with expression of type 'my_bool' (aka 'char') is always
      false [-Wtautological-constant-out-of-range-compare]
    if (pvio_socket_blocking(pvio, 1, 0) == SOCKET_ERROR)
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~
plugins/pvio/pvio_socket.c:875:46: warning: comparison of constant -1 with expression of type 'my_bool' (aka 'char') is always
      false [-Wtautological-constant-out-of-range-compare]
        if (pvio_socket_blocking(pvio, 0, 0) == SOCKET_ERROR)
            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~
plugins/pvio/pvio_socket.c:907:42: warning: comparison of constant -1 with expression of type 'my_bool' (aka 'char') is always
      false [-Wtautological-constant-out-of-range-compare]
    if (pvio_socket_blocking(pvio, 1, 0) == SOCKET_ERROR)

ma_hext2int: signed char - prevent compiler errors when char is unsigned.

libmariadb/ma_tls.c:169:31: warning: comparison of constant -1 with expression of type 'char' is always false
      [-Wtautological-constant-out-of-range-compare]
    if ((d1 = ma_hex2int(*p)) == - 1 ||
        ~~~~~~~~~~~~~~~~~~~~~ ^  ~~~
libmariadb/ma_tls.c:170:35: warning: comparison of constant -1 with expression of type 'char' is always false
      [-Wtautological-constant-out-of-range-compare]
        (d2 = ma_hex2int(*(p+1))) == -1 ||
        ~~~~~~~~~~~~~~~~~~~~~~~~~ ^  ~~

To fix this all the pvio_*_blocking functions have been changed to use
int as a return value.

Other my_bool/char differences fixed:

mariadb_dyncol_val_str: fix prototype to use char - like implemented function.

unittest: bind.is_null is my_bool* so we use a my_bool.
This commit is contained in:
Daniel Black
2018-07-18 09:28:05 +10:00
parent d3e06bc161
commit b19f6a475b
9 changed files with 19 additions and 19 deletions
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4
libmariadb/ma_tls.c
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@@ -130,7 +130,7 @@ const char *ma_pvio_tls_get_protocol_version(MARIADB_TLS *ctls)
return tls_protocol_version[version];
}
static char ma_hex2int(char c)
static signed char ma_hex2int(char c)
{
if (c >= '0' && c <= '9')
return c - '0';
@@ -161,7 +161,7 @@ static my_bool ma_pvio_tls_compare_fp(const char *cert_fp,
for(c= (char *)cert_fp; c < cert_fp + cert_fp_len; c++)
{
char d1, d2;
signed char d1, d2;
if (*p == ':')
p++;
if (p - fp > (int)fp_len -1)