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LibC: Misc additions

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This commit is contained in:
Sergey Bugaev 2019-10-02 22:48:14 +03:00 • committed by Andreas Kling
parent 17597f4681
commit 89bf38864a
4 changed files with 40 additions and 4 deletions
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1
Libraries/LibC/dlfcn.h
View file

@ -4,6 +4,7 @@
__BEGIN_DECLS __BEGIN_DECLS
#define RTLD_DEFAULT 0
#define RTLD_LAZY 1 #define RTLD_LAZY 1
#define RTLD_NOW 2 #define RTLD_NOW 2
#define RTLD_GLOBAL 3 #define RTLD_GLOBAL 3

3
Libraries/LibC/limits.h
View file

@ -23,6 +23,9 @@
#define LONG_MAX 2147483647L #define LONG_MAX 2147483647L
#define LONG_MIN (-LONG_MAX - 1L) #define LONG_MIN (-LONG_MAX - 1L)
#define LONG_LONG_MAX 9223372036854775807LL
#define LONG_LONG_MIN (-LONG_LONG_MAX - 1LL)
#define CHAR_MIN SCHAR_MIN #define CHAR_MIN SCHAR_MIN
#define CHAR_MAX SCHAR_MAX #define CHAR_MAX SCHAR_MAX

37
Libraries/LibC/stdlib.cpp
View file

@ -167,6 +167,8 @@ int putenv(char* new_var)
return 0; return 0;
} }
}
double strtod(const char* str, char** endptr) double strtod(const char* str, char** endptr)
{ {
(void)str; (void)str;
@ -175,6 +177,15 @@ double strtod(const char* str, char** endptr)
ASSERT_NOT_REACHED(); ASSERT_NOT_REACHED();
} }
long double strtold(const char* str, char** endptr)
{
(void)str;
(void)endptr;
dbgprintf("LibC: strtold: '%s'\n", str);
ASSERT_NOT_REACHED();
}
float strtof(const char* str, char** endptr) float strtof(const char* str, char** endptr)
{ {
(void)str; (void)str;
@ -374,7 +385,8 @@ size_t mbstowcs(wchar_t*, const char*, size_t)
ASSERT_NOT_REACHED(); ASSERT_NOT_REACHED();
} }
long strtol(const char* nptr, char** endptr, int base) template<typename T, T min_value, T max_value>
static T strtol_impl(const char* nptr, char** endptr, int base)
{ {
errno = 0; errno = 0;
@ -411,8 +423,8 @@ long strtol(const char* nptr, char** endptr, int base)
} }
} }
long cutoff_point = is_negative ? (LONG_MIN / base) : (LONG_MAX / base); long cutoff_point = is_negative ? (min_value / base) : (max_value / base);
int max_valid_digit_at_cutoff_point = is_negative ? (LONG_MIN % base) : (LONG_MAX % base); int max_valid_digit_at_cutoff_point = is_negative ? (min_value % base) : (max_value % base);
long num = 0; long num = 0;
@ -441,7 +453,7 @@ long strtol(const char* nptr, char** endptr, int base)
if (is_past_cutoff || (num == cutoff_point && digit > max_valid_digit_at_cutoff_point)) { if (is_past_cutoff || (num == cutoff_point && digit > max_valid_digit_at_cutoff_point)) {
has_overflowed = true; has_overflowed = true;
num = is_negative ? LONG_MIN : LONG_MAX; num = is_negative ? min_value : max_value;
errno = ERANGE; errno = ERANGE;
} else { } else {
num *= base; num *= base;
@ -459,10 +471,27 @@ long strtol(const char* nptr, char** endptr, int base)
return num; return num;
} }
long strtol(const char* str, char** endptr, int base)
{
return strtol_impl<long, LONG_MIN, LONG_MAX>(str, endptr, base);
}
unsigned long strtoul(const char* str, char** endptr, int base) unsigned long strtoul(const char* str, char** endptr, int base)
{ {
auto value = strtol(str, endptr, base); auto value = strtol(str, endptr, base);
ASSERT(value >= 0); ASSERT(value >= 0);
return value; return value;
} }
long long strtoll(const char* str, char** endptr, int base)
{
return strtol_impl<long long, LONG_LONG_MIN, LONG_LONG_MAX>(str, endptr, base);
} }
unsigned long long strtoull(const char* str, char** endptr, int base)
{
auto value = strtoll(str, endptr, base);
ASSERT(value >= 0);
return value;
}

3
Libraries/LibC/stdlib.h
View file

@ -23,8 +23,11 @@ int atoi(const char*);
long atol(const char*); long atol(const char*);
long long atoll(const char*); long long atoll(const char*);
double strtod(const char*, char** endptr); double strtod(const char*, char** endptr);
long double strtold(const char*, char** endptr);
float strtof(const char*, char** endptr); float strtof(const char*, char** endptr);
long strtol(const char*, char** endptr, int base); long strtol(const char*, char** endptr, int base);
long long strtoll(const char*, char** endptr, int base);
unsigned long long strtoull(const char*, char** endptr, int base);
unsigned long strtoul(const char*, char** endptr, int base); unsigned long strtoul(const char*, char** endptr, int base);
void qsort(void* base, size_t nmemb, size_t size, int (*compar)(const void*, const void*)); void qsort(void* base, size_t nmemb, size_t size, int (*compar)(const void*, const void*));
void qsort_r(void* base, size_t nmemb, size_t size, int (*compar)(const void*, const void*, void*), void* arg); void qsort_r(void* base, size_t nmemb, size_t size, int (*compar)(const void*, const void*, void*), void* arg);