libc: support for building libstdc++?

This commit is contained in:
K. Lange 2018-10-12 10:35:28 +09:00
parent c3a6b4f486
commit b33815c632
15 changed files with 183 additions and 1 deletions

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@ -1,4 +1,5 @@
#ifndef NDEBUG
extern void __assert_func(const char * file, int line, const char * func, const char * failedexpr);
#define assert(statement) ((statement) ? (void)0 : __assert_func(__FILE__, __LINE__, __FUNCTION__, #statement))
#else
#define assert(statement) ((void)0)

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@ -17,3 +17,16 @@ extern int isascii(int c);
extern int tolower(int c);
extern int toupper(int c);
/* Derived from newlib */
#define _U 01
#define _L 02
#define _N 04
#define _S 010
#define _P 020
#define _C 040
#define _X 0100
#define _B 0200
extern char _ctype_[256];

10
base/usr/include/iconv.h Normal file
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@ -0,0 +1,10 @@
#pragma once
#include <stddef.h>
typedef void * iconv_t;
extern iconv_t iconv_open(const char *tocode, const char *fromcode);
extern int iconv_close(iconv_t cd);
extern size_t iconv(iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft);

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@ -6,7 +6,9 @@ extern double pow(double x, double y);
extern double exp(double x);
extern double fmod(double x, double y);
extern double sqrt(double x);
extern float sqrtf(float x);
extern double fabs(double x);
extern float fabsf(float x);
extern double sin(double x);
extern double cos(double x);

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@ -83,3 +83,10 @@ extern int vsscanf(const char *str, const char *format, va_list ap);
extern int sscanf(const char *str, const char *format, ...);
extern int vfscanf(FILE * stream, const char *format, va_list ap);
extern int fscanf(FILE *stream, const char *format, ...);
extern int scanf(const char *format, ...);
typedef long fpos_t;
extern int fgetpos(FILE *stream, fpos_t *pos);
extern int fsetpos(FILE *stream, const fpos_t *pos);

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@ -21,6 +21,7 @@ extern int setenv(const char *name, const char *value, int overwrite);
extern int unsetenv(const char * str);
extern double strtod(const char *nptr, char **endptr);
extern float strtof(const char *nptr, char **endptr);
extern double atof(const char * nptr);
extern int atoi(const char * nptr);
extern long atol(const char * nptr);
@ -49,7 +50,14 @@ extern void abort(void);
extern void *bsearch(const void *key, const void *base, size_t nmemb, size_t size,
int (*compar)(const void *, const void *));
extern char * mktemp(char * template);
extern char * mktemp(char *);
extern size_t mbstowcs(wchar_t *dest, const char *src, size_t n);
extern size_t wcstombs(char * dest, const wchar_t *src, size_t n);
typedef struct { int quot; int rem; } div_t;
typedef struct { long int quot; long int rem; } ldiv_t;
extern div_t div(int numerator, int denominator);
extern ldiv_t ldiv(long numerator, long denominator);

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@ -45,5 +45,6 @@ extern char * strtok_r(char * str, const char * delim, char ** saveptr);
extern char * strncpy(char *dest, const char *src, size_t n);
extern char * strerror(int errnum);
extern size_t strxfrm(char *dest, const char *src, size_t n);
#include <strings.h>

20
libc/ctype/_ctype.c Normal file
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@ -0,0 +1,20 @@
#include <ctype.h>
char _ctype_[256]= {
_C, _C, _C, _C, _C, _C, _C, _C,
_C, _C|_S, _C|_S, _C|_S, _C|_S, _C|_S, _C, _C,
_C, _C, _C, _C, _C, _C, _C, _C,
_C, _C, _C, _C, _C, _C, _C, _C,
_S|_B, _P, _P, _P, _P, _P, _P, _P,
_P, _P, _P, _P, _P, _P, _P, _P,
_N, _N, _N, _N, _N, _N, _N, _N,
_N, _N, _P, _P, _P, _P, _P, _P,
_P, _U|_X, _U|_X, _U|_X, _U|_X, _U|_X, _U|_X, _U,
_U, _U, _U, _U, _U, _U, _U, _U,
_U, _U, _U, _U, _U, _U, _U, _U,
_U, _U, _U, _P, _P, _P, _P, _P,
_P, _L|_X, _L|_X, _L|_X, _L|_X, _L|_X, _L|_X, _L,
_L, _L, _L, _L, _L, _L, _L, _L,
_L, _L, _L, _L, _L, _L, _L, _L,
_L, _L, _L, _P, _P, _P, _P, _C
};

37
libc/iconv/iconv.c Normal file
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@ -0,0 +1,37 @@
#include <iconv.h>
#include <errno.h>
#include <string.h>
struct _iconv_state {
char *tocode;
char *fromcode;
};
iconv_t iconv_open(const char *tocode, const char *fromcode) {
errno = EINVAL;
return (iconv_t)-1;
#if 0
struct _iconv_state * state = malloc(sizeof(struct _iconv_state));
state->tocode = strdup(tocode);
state->fromcode = strdup(fromcode);
return (iconv_t)state;
#endif
}
int iconv_close(iconv_t cd) {
struct _iconv_state * state = (struct _iconv_state*)cd;
free(state->tocode);
free(state->fromcode);
free(cd);
return 0;
}
size_t iconv(iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft) {
return -1;
}

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@ -68,6 +68,10 @@ double fabs(double x) {
return __builtin_fabs(x);
}
float fabsf(float x) {
return fabs(x);
}
double fmod(double x, double y) {
MATH;
if (x >= 0.0) {
@ -85,6 +89,10 @@ double sqrt(double x) {
return __builtin_sqrt(x);
}
float sqrtf(float x) {
return sqrt(x);
}
static double bad_sine_table[] = {
0,
0.01745240644,

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@ -52,3 +52,11 @@ int fscanf(FILE *stream, const char *format, ...) {
va_end(args);
return out;
}
int scanf(const char *format, ...) {
va_list args;
va_start(args, format);
int out = vfscanf(stdin, format, args);
va_end(args);
return out;
}

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@ -289,6 +289,18 @@ long ftell(FILE * stream) {
return resp;
}
int fgetpos(FILE *stream, fpos_t *pos) {
long ret = ftell(stream);
if (ret == -1) return -1;
*pos = ret;
return 0;
}
int fsetpos(FILE *stream, const fpos_t *pos) {
return fseek(stream, *pos, SEEK_SET);
}
size_t fread(void *ptr, size_t size, size_t nmemb, FILE * stream) {
char * tracking = (char*)ptr;
for (size_t i = 0; i < nmemb; ++i) {

33
libc/stdlib/div.c Normal file
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@ -0,0 +1,33 @@
#include <stdlib.h>
div_t div(int numerator, int denominator) {
div_t out;
out.quot = numerator / denominator;
out.rem = numerator % denominator;
if (numerator >= 0 && out.rem < 0) {
out.quot++;
out.rem -= denominator;
} else if (numerator < 0 && out.rem > 0) {
out.quot--;
out.rem += denominator;
}
return out;
}
ldiv_t ldiv(long numerator, long denominator) {
ldiv_t out;
out.quot = numerator / denominator;
out.rem = numerator % denominator;
if (numerator >= 0 && out.rem < 0) {
out.quot++;
out.rem -= denominator;
} else if (numerator < 0 && out.rem > 0) {
out.quot--;
out.rem += denominator;
}
return out;
}

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@ -72,3 +72,6 @@ double strtod(const char *nptr, char **endptr) {
return result;
}
float strtof(const char *nptr, char **endptr) {
return strtod(nptr,endptr);
}

19
libc/string/strxfrm.c Normal file
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@ -0,0 +1,19 @@
#include <string.h>
/**
* We only really support the "C" locale, so this is always
* just a dumb memcpy.
*/
size_t strxfrm(char *dest, const char *src, size_t n) {
size_t i = 0;
while (*src && i < n) {
*dest = *src;
dest++;
src++;
i++;
}
if (i < n) {
*dest = '\0';
}
return i;
}