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///////////////////////////////////////////////////////////////////////////////
//
/// \file util.c
/// \brief Miscellaneous utility functions
//
// Copyright (C) 2007 Lasse Collin
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
///////////////////////////////////////////////////////////////////////////////
#include "private.h"
/// \brief Fancy version of strtoull()
///
/// \param name Name of the option to show in case of an error
/// \param value String containing the number to be parsed; may
/// contain suffixes "k", "M", "G", "Ki", "Mi", or "Gi"
/// \param min Minimum valid value
/// \param max Maximum valid value
///
/// \return Parsed value that is in the range [min, max]. Does not return
/// if an error occurs.
///
extern uint64_t
str_to_uint64(const char *name, const char *value, uint64_t min, uint64_t max)
{
uint64_t result = 0;
// Skip blanks.
while (*value == ' ' || *value == '\t')
++value;
if (*value < '0' || *value > '9') {
errmsg(V_ERROR, _("%s: Value is not a non-negative "
"decimal integer"),
value);
my_exit(ERROR);
}
do {
// Don't overflow.
if (result > (UINT64_MAX - 9) / 10)
goto error;
result *= 10;
result += *value - '0';
++value;
} while (*value >= '0' && *value <= '9');
if (*value != '\0') {
// Look for suffix.
static const struct {
const char *name;
uint64_t multiplier;
} suffixes[] = {
{ "k", UINT64_C(1000) },
{ "M", UINT64_C(1000000) },
{ "G", UINT64_C(1000000000) },
{ "Ki", UINT64_C(1024) },
{ "Mi", UINT64_C(1048576) },
{ "Gi", UINT64_C(1073741824) },
{ NULL, 0 }
};
uint64_t multiplier = 0;
for (size_t i = 0; suffixes[i].name != NULL; ++i) {
if (strcmp(value, suffixes[i].name) == 0) {
multiplier = suffixes[i].multiplier;
break;
}
}
if (multiplier == 0) {
errmsg(V_ERROR, _("%s: Invalid multiplier suffix. "
"Valid suffixes:"), value);
errmsg(V_ERROR, "`k' (10^3), `M' (10^6), `G' (10^9) "
"`Ki' (2^10), `Mi' (2^20), "
"`Gi' (2^30)");
my_exit(ERROR);
}
// Don't overflow here either.
if (result > UINT64_MAX / multiplier)
goto error;
result *= multiplier;
}
if (result < min || result > max)
goto error;
return result;
error:
errmsg(V_ERROR, _("Value of the option `%s' must be in the range "
"[%llu, %llu]"), name,
(unsigned long long)(min),
(unsigned long long)(max));
my_exit(ERROR);
}
/// \brief Gets filename part from pathname+filename
///
/// \return Pointer in the filename where the actual filename starts.
/// If the last character is a slash, NULL is returned.
///
extern const char *
str_filename(const char *name)
{
const char *base = strrchr(name, '/');
if (base == NULL) {
base = name;
} else if (*++base == '\0') {
base = NULL;
errmsg(V_ERROR, _("%s: Invalid filename"), name);
}
return base;
}
/*
/// \brief Simple quoting to get rid of ASCII control characters
///
/// This is not so cool and locale-dependent, but should be good enough
/// At least we don't print any control characters on the terminal.
///
extern char *
str_quote(const char *str)
{
size_t dest_len = 0;
bool has_ctrl = false;
while (str[dest_len] != '\0')
if (*(unsigned char *)(str + dest_len++) < 0x20)
has_ctrl = true;
char *dest = malloc(dest_len + 1);
if (dest != NULL) {
if (has_ctrl) {
for (size_t i = 0; i < dest_len; ++i)
if (*(unsigned char *)(str + i) < 0x20)
dest[i] = '?';
else
dest[i] = str[i];
dest[dest_len] = '\0';
} else {
// Usually there are no control characters,
// so we can optimize.
memcpy(dest, str, dest_len + 1);
}
}
return dest;
}
*/
extern bool
is_empty_filename(const char *filename)
{
if (filename[0] == '\0') {
errmsg(V_WARNING, _("Empty filename, skipping"));
return true;
}
return false;
}
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