* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
+#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu/host-utils.h"
#include <math.h>
#include "qemu/sockets.h"
#include "qemu/iov.h"
+#include "net/net.h"
+#include "qemu/cutils.h"
void strpadcpy(char *buf, int buf_size, const char *str, char pad)
{
return i;
}
+char *qemu_strsep(char **input, const char *delim)
+{
+ char *result = *input;
+ if (result != NULL) {
+ char *p;
+
+ for (p = result; *p != '\0'; p++) {
+ if (strchr(delim, *p)) {
+ break;
+ }
+ }
+ if (*p == '\0') {
+ *input = NULL;
+ } else {
+ *p = '\0';
+ *input = p + 1;
+ }
+ }
+ return result;
+}
+
time_t mktimegm(struct tm *tm)
{
time_t t;
return t;
}
-int qemu_fls(int i)
-{
- return 32 - clz32(i);
-}
-
/*
* Make sure data goes on disk, but if possible do not bother to
* write out the inode just for timestamp updates.
#endif
}
-/*
- * Checks if a buffer is all zeroes
- *
- * Attention! The len must be a multiple of 4 * sizeof(long) due to
- * restriction of optimizations in this function.
- */
-bool buffer_is_zero(const void *buf, size_t len)
-{
- /*
- * Use long as the biggest available internal data type that fits into the
- * CPU register and unroll the loop to smooth out the effect of memory
- * latency.
- */
-
- size_t i;
- long d0, d1, d2, d3;
- const long * const data = buf;
-
- assert(len % (4 * sizeof(long)) == 0);
- len /= sizeof(long);
-
- for (i = 0; i < len; i += 4) {
- d0 = data[i + 0];
- d1 = data[i + 1];
- d2 = data[i + 2];
- d3 = data[i + 3];
-
- if (d0 || d1 || d2 || d3) {
- return false;
- }
- }
-
- return true;
-}
-
#ifndef _WIN32
/* Sets a specific flag */
int fcntl_setfl(int fd, int flag)
static int64_t suffix_mul(char suffix, int64_t unit)
{
switch (qemu_toupper(suffix)) {
- case STRTOSZ_DEFSUFFIX_B:
+ case QEMU_STRTOSZ_DEFSUFFIX_B:
return 1;
- case STRTOSZ_DEFSUFFIX_KB:
+ case QEMU_STRTOSZ_DEFSUFFIX_KB:
return unit;
- case STRTOSZ_DEFSUFFIX_MB:
+ case QEMU_STRTOSZ_DEFSUFFIX_MB:
return unit * unit;
- case STRTOSZ_DEFSUFFIX_GB:
+ case QEMU_STRTOSZ_DEFSUFFIX_GB:
return unit * unit * unit;
- case STRTOSZ_DEFSUFFIX_TB:
+ case QEMU_STRTOSZ_DEFSUFFIX_TB:
return unit * unit * unit * unit;
+ case QEMU_STRTOSZ_DEFSUFFIX_PB:
+ return unit * unit * unit * unit * unit;
+ case QEMU_STRTOSZ_DEFSUFFIX_EB:
+ return unit * unit * unit * unit * unit * unit;
}
return -1;
}
* in *end, if not NULL. Return -ERANGE on overflow, Return -EINVAL on
* other error.
*/
-int64_t strtosz_suffix_unit(const char *nptr, char **end,
+int64_t qemu_strtosz_suffix_unit(const char *nptr, char **end,
const char default_suffix, int64_t unit)
{
int64_t retval = -EINVAL;
return retval;
}
-int64_t strtosz_suffix(const char *nptr, char **end, const char default_suffix)
+int64_t qemu_strtosz_suffix(const char *nptr, char **end,
+ const char default_suffix)
{
- return strtosz_suffix_unit(nptr, end, default_suffix, 1024);
+ return qemu_strtosz_suffix_unit(nptr, end, default_suffix, 1024);
}
-int64_t strtosz(const char *nptr, char **end)
+int64_t qemu_strtosz(const char *nptr, char **end)
{
- return strtosz_suffix(nptr, end, STRTOSZ_DEFSUFFIX_MB);
+ return qemu_strtosz_suffix(nptr, end, QEMU_STRTOSZ_DEFSUFFIX_MB);
}
-int qemu_parse_fd(const char *param)
+/**
+ * Helper function for qemu_strto*l() functions.
+ */
+static int check_strtox_error(const char *p, char *endptr, const char **next,
+ int err)
{
- int fd;
- char *endptr = NULL;
+ /* If no conversion was performed, prefer BSD behavior over glibc
+ * behavior.
+ */
+ if (err == 0 && endptr == p) {
+ err = EINVAL;
+ }
+ if (!next && *endptr) {
+ return -EINVAL;
+ }
+ if (next) {
+ *next = endptr;
+ }
+ return -err;
+}
- fd = strtol(param, &endptr, 10);
- if (*endptr || (fd == 0 && param == endptr)) {
- return -1;
+/**
+ * QEMU wrappers for strtol(), strtoll(), strtoul(), strotull() C functions.
+ *
+ * Convert ASCII string @nptr to a long integer value
+ * from the given @base. Parameters @nptr, @endptr, @base
+ * follows same semantics as strtol() C function.
+ *
+ * Unlike from strtol() function, if @endptr is not NULL, this
+ * function will return -EINVAL whenever it cannot fully convert
+ * the string in @nptr with given @base to a long. This function returns
+ * the result of the conversion only through the @result parameter.
+ *
+ * If NULL is passed in @endptr, then the whole string in @ntpr
+ * is a number otherwise it returns -EINVAL.
+ *
+ * RETURN VALUE
+ * Unlike from strtol() function, this wrapper returns either
+ * -EINVAL or the errno set by strtol() function (e.g -ERANGE).
+ * If the conversion overflows, -ERANGE is returned, and @result
+ * is set to the max value of the desired type
+ * (e.g. LONG_MAX, LLONG_MAX, ULONG_MAX, ULLONG_MAX). If the case
+ * of underflow, -ERANGE is returned, and @result is set to the min
+ * value of the desired type. For strtol(), strtoll(), @result is set to
+ * LONG_MIN, LLONG_MIN, respectively, and for strtoul(), strtoull() it
+ * is set to 0.
+ */
+int qemu_strtol(const char *nptr, const char **endptr, int base,
+ long *result)
+{
+ char *p;
+ int err = 0;
+ if (!nptr) {
+ if (endptr) {
+ *endptr = nptr;
+ }
+ err = -EINVAL;
+ } else {
+ errno = 0;
+ *result = strtol(nptr, &p, base);
+ err = check_strtox_error(nptr, p, endptr, errno);
}
- return fd;
+ return err;
+}
+
+/**
+ * Converts ASCII string to an unsigned long integer.
+ *
+ * If string contains a negative number, value will be converted to
+ * the unsigned representation of the signed value, unless the original
+ * (nonnegated) value would overflow, in this case, it will set @result
+ * to ULONG_MAX, and return ERANGE.
+ *
+ * The same behavior holds, for qemu_strtoull() but sets @result to
+ * ULLONG_MAX instead of ULONG_MAX.
+ *
+ * See qemu_strtol() documentation for more info.
+ */
+int qemu_strtoul(const char *nptr, const char **endptr, int base,
+ unsigned long *result)
+{
+ char *p;
+ int err = 0;
+ if (!nptr) {
+ if (endptr) {
+ *endptr = nptr;
+ }
+ err = -EINVAL;
+ } else {
+ errno = 0;
+ *result = strtoul(nptr, &p, base);
+ /* Windows returns 1 for negative out-of-range values. */
+ if (errno == ERANGE) {
+ *result = -1;
+ }
+ err = check_strtox_error(nptr, p, endptr, errno);
+ }
+ return err;
+}
+
+/**
+ * Converts ASCII string to a long long integer.
+ *
+ * See qemu_strtol() documentation for more info.
+ */
+int qemu_strtoll(const char *nptr, const char **endptr, int base,
+ int64_t *result)
+{
+ char *p;
+ int err = 0;
+ if (!nptr) {
+ if (endptr) {
+ *endptr = nptr;
+ }
+ err = -EINVAL;
+ } else {
+ errno = 0;
+ *result = strtoll(nptr, &p, base);
+ err = check_strtox_error(nptr, p, endptr, errno);
+ }
+ return err;
+}
+
+/**
+ * Converts ASCII string to an unsigned long long integer.
+ *
+ * See qemu_strtol() documentation for more info.
+ */
+int qemu_strtoull(const char *nptr, const char **endptr, int base,
+ uint64_t *result)
+{
+ char *p;
+ int err = 0;
+ if (!nptr) {
+ if (endptr) {
+ *endptr = nptr;
+ }
+ err = -EINVAL;
+ } else {
+ errno = 0;
+ *result = strtoull(nptr, &p, base);
+ /* Windows returns 1 for negative out-of-range values. */
+ if (errno == ERANGE) {
+ *result = -1;
+ }
+ err = check_strtox_error(nptr, p, endptr, errno);
+ }
+ return err;
+}
+
+/**
+ * parse_uint:
+ *
+ * @s: String to parse
+ * @value: Destination for parsed integer value
+ * @endptr: Destination for pointer to first character not consumed
+ * @base: integer base, between 2 and 36 inclusive, or 0
+ *
+ * Parse unsigned integer
+ *
+ * Parsed syntax is like strtoull()'s: arbitrary whitespace, a single optional
+ * '+' or '-', an optional "0x" if @base is 0 or 16, one or more digits.
+ *
+ * If @s is null, or @base is invalid, or @s doesn't start with an
+ * integer in the syntax above, set *@value to 0, *@endptr to @s, and
+ * return -EINVAL.
+ *
+ * Set *@endptr to point right beyond the parsed integer (even if the integer
+ * overflows or is negative, all digits will be parsed and *@endptr will
+ * point right beyond them).
+ *
+ * If the integer is negative, set *@value to 0, and return -ERANGE.
+ *
+ * If the integer overflows unsigned long long, set *@value to
+ * ULLONG_MAX, and return -ERANGE.
+ *
+ * Else, set *@value to the parsed integer, and return 0.
+ */
+int parse_uint(const char *s, unsigned long long *value, char **endptr,
+ int base)
+{
+ int r = 0;
+ char *endp = (char *)s;
+ unsigned long long val = 0;
+
+ if (!s) {
+ r = -EINVAL;
+ goto out;
+ }
+
+ errno = 0;
+ val = strtoull(s, &endp, base);
+ if (errno) {
+ r = -errno;
+ goto out;
+ }
+
+ if (endp == s) {
+ r = -EINVAL;
+ goto out;
+ }
+
+ /* make sure we reject negative numbers: */
+ while (isspace((unsigned char)*s)) {
+ s++;
+ }
+ if (*s == '-') {
+ val = 0;
+ r = -ERANGE;
+ goto out;
+ }
+
+out:
+ *value = val;
+ *endptr = endp;
+ return r;
+}
+
+/**
+ * parse_uint_full:
+ *
+ * @s: String to parse
+ * @value: Destination for parsed integer value
+ * @base: integer base, between 2 and 36 inclusive, or 0
+ *
+ * Parse unsigned integer from entire string
+ *
+ * Have the same behavior of parse_uint(), but with an additional check
+ * for additional data after the parsed number. If extra characters are present
+ * after the parsed number, the function will return -EINVAL, and *@v will
+ * be set to 0.
+ */
+int parse_uint_full(const char *s, unsigned long long *value, int base)
+{
+ char *endp;
+ int r;
+
+ r = parse_uint(s, value, &endp, base);
+ if (r < 0) {
+ return r;
+ }
+ if (*endp) {
+ *value = 0;
+ return -EINVAL;
+ }
+
+ return 0;
}
-/* round down to the nearest power of 2*/
-int64_t pow2floor(int64_t value)
+int qemu_parse_fd(const char *param)
{
- if (!is_power_of_2(value)) {
- value = 0x8000000000000000ULL >> clz64(value);
+ long fd;
+ char *endptr;
+
+ errno = 0;
+ fd = strtol(param, &endptr, 10);
+ if (param == endptr /* no conversion performed */ ||
+ errno != 0 /* not representable as long; possibly others */ ||
+ *endptr != '\0' /* final string not empty */ ||
+ fd < 0 /* invalid as file descriptor */ ||
+ fd > INT_MAX /* not representable as int */) {
+ return -1;
}
- return value;
+ return fd;
}
/*
return 2;
}
}
+
+/*
+ * helper to parse debug environment variables
+ */
+int parse_debug_env(const char *name, int max, int initial)
+{
+ char *debug_env = getenv(name);
+ char *inv = NULL;
+ long debug;
+
+ if (!debug_env) {
+ return initial;
+ }
+ errno = 0;
+ debug = strtol(debug_env, &inv, 10);
+ if (inv == debug_env) {
+ return initial;
+ }
+ if (debug < 0 || debug > max || errno != 0) {
+ fprintf(stderr, "warning: %s not in [0, %d]", name, max);
+ return initial;
+ }
+ return debug;
+}
+
+/*
+ * Helper to print ethernet mac address
+ */
+const char *qemu_ether_ntoa(const MACAddr *mac)
+{
+ static char ret[18];
+
+ snprintf(ret, sizeof(ret), "%02x:%02x:%02x:%02x:%02x:%02x",
+ mac->a[0], mac->a[1], mac->a[2], mac->a[3], mac->a[4], mac->a[5]);
+
+ return ret;
+}
projects / qemu.git / blobdiff