Add stubs for many libc functions, and a few implemenations too

9 files changed, 526 insertions, 0 deletions

diff --git a/src/lib/libc/errno.c b/src/lib/libc/errno.c
new file mode 100644
index 0000000..b5865fa
--- /dev/null
+++ b/src/lib/libc/errno.c
@@ -0,0 +1,6 @@
+#include <errno.h>
+
+int errno = 0;
+
+
+/* vim: set sts=0 ts=4 sw=4 tw=0 noet :*/
diff --git a/src/lib/libc/locale.c b/src/lib/libc/locale.c
new file mode 100644
index 0000000..3c7db9e
--- /dev/null
+++ b/src/lib/libc/locale.c
@@ -0,0 +1,22 @@
+#include <locale.h>
+#include <stddef.h>
+#include <limits.h>
+
+struct lconv c_locale_lconv = {
+	".", "", "", "", "", "", "", "",
+	"", "", CHAR_MAX, CHAR_MAX, CHAR_MAX,
+	CHAR_MAX, CHAR_MAX, CHAR_MAX, CHAR_MAX,
+	CHAR_MAX
+};
+
+struct lconv *localeconv() {
+	// TODO
+	return &c_locale_lconv;
+}
+
+char* setlocale(int catebory, const char* locale) {
+	// TODO
+	return NULL;
+}
+
+/* vim: set sts=0 ts=4 sw=4 tw=0 noet :*/
diff --git a/src/lib/libc/malloc.c b/src/lib/libc/malloc.c
index cb983fd..2d43656 100644
--- a/src/lib/libc/malloc.c
+++ b/src/lib/libc/malloc.c
@@ -63,6 +63,10 @@ void* calloc(size_t nmemb, size_t sz) {
 	return r;
 }
 
+void* realloc(void* ptr, size_t sz) {
+	return slab_realloc(mem_allocator, ptr, sz);
+}
+
 void free(void* ptr) {
 	slab_free(mem_allocator, ptr);
 }
diff --git a/src/lib/libc/math.c b/src/lib/libc/math.c
new file mode 100644
index 0000000..b859f04
--- /dev/null
+++ b/src/lib/libc/math.c
@@ -0,0 +1,151 @@
+#include <math.h>
+
+float fabsf(float x) {
+	// TODO
+	return 0;
+}
+
+float cosf(float x) {
+	// TODO
+	return 0;
+}
+float sinf(float x) {
+	// TODO
+	return 0;
+}
+float tanf(float x) {
+	// TODO
+	return 0;
+}
+
+float acosf(float x) {
+	// TODO
+	return 0;
+}
+float asinf(float x) {
+	// TODO
+	return 0;
+}
+float atan2f(float y, float x) {
+	// TODO
+	return 0;
+}
+
+float floorf(float x) {
+	// TODO
+	return 0;
+}
+float ceilf(float x) {
+	// TODO
+	return 0;
+}
+float fmodf(float x, float y) {
+	// TODO
+	return 0;
+}
+
+float sqrtf(float x) {
+	// TODO
+	return 0;
+}
+float logf(float x) {
+	// TODO
+	return 0;
+}
+float log2f(float x) {
+	// TODO
+	return 0;
+}
+float log10f(float x) {
+	// TODO
+	return 0;
+}
+float expf(float x) {
+	// TODO
+	return 0;
+}
+float frexpf(float x, int *exp) {
+	// TODO
+	return 0;
+}
+float powf(float x, float y) {
+	// TODO
+	return 0;
+}
+
+
+
+double fabs(double x) {
+	// TODO
+	return 0;
+}
+
+double cos(double x) {
+	// TODO
+	return 0;
+}
+double sin(double x) {
+	// TODO
+	return 0;
+}
+double tan(double x) {
+	// TODO
+	return 0;
+}
+
+double acos(double x) {
+	// TODO
+	return 0;
+}
+double asin(double x) {
+	// TODO
+	return 0;
+}
+double atan2(double y, double x) {
+	// TODO
+	return 0;
+}
+
+double floor(double x) {
+	// TODO
+	return 0;
+}
+double ceil(double x) {
+	// TODO
+	return 0;
+}
+double fmod(double x, double y) {
+	// TODO
+	return 0;
+}
+
+double sqrt(double x) {
+	// TODO
+	return 0;
+}
+double log(double x) {
+	// TODO
+	return 0;
+}
+double log2(double x) {
+	// TODO
+	return 0;
+}
+double log10(double x) {
+	// TODO
+	return 0;
+}
+double exp(double x) {
+	// TODO
+	return 0;
+}
+double frexp(double x, int *exp) {
+	// TODO
+	return 0;
+}
+double pow(double x, double y) {
+	// TODO
+	return 0;
+}
+
+/* vim: set sts=0 ts=4 sw=4 tw=0 noet :*/
diff --git a/src/lib/libc/setjmp.s b/src/lib/libc/setjmp.s
new file mode 100644
index 0000000..164cc5b
--- /dev/null
+++ b/src/lib/libc/setjmp.s
@@ -0,0 +1,53 @@
+[GLOBAL setjmp]
+setjmp:
+	; Store general purpose registers
+	; (in new stack frame)
+	mov [esp+4], eax
+	mov [esp+8], ebx
+	mov [esp+12], ecx
+	mov [esp+16], edx
+	mov [esp+20], edi
+	mov [esp+24], esi
+	mov [esp+28], ebp
+	mov [esp+32], esp
+
+	; Store flags
+	pushf
+	pop eax
+	mov [esp+36], eax
+
+	; Store return address
+	mov eax, [esp]
+	mov [esp+40], eax
+
+	; return 0
+	xor eax, eax
+	ret
+
+
+[GLOBAL longjmp]
+longjmp:
+	; on previous stack, resume return address
+	mov eax, [esp+32]
+	mov ebx, [esp+40]
+	mov [eax], ebx
+
+	; resume flags
+	mov eax, [esp+36]
+	push eax
+	popf
+
+	; load return value in eax
+	mov eax, [esp+44]
+	; resume geneal purpose registers, except eax/esp
+	mov ebx, [esp+8]
+	mov ecx, [esp+12]
+	mov edx, [esp+16]
+	mov edi, [esp+20]
+	mov esi, [esp+24]
+	mov ebp, [esp+28]
+
+	; resume previous esp
+	mov esp, [esp+32]
+	; return as if we were the setjmp call
+	ret
diff --git a/src/lib/libc/signal.c b/src/lib/libc/signal.c
new file mode 100644
index 0000000..e9037c1
--- /dev/null
+++ b/src/lib/libc/signal.c
@@ -0,0 +1,8 @@
+#include <signal.h>
+
+void (*signal(int sig, void (*func)(int)))(int) {
+	// TODO
+	return 0;
+}
+
+/* vim: set sts=0 ts=4 sw=4 tw=0 noet :*/
diff --git a/src/lib/libc/stdio.c b/src/lib/libc/stdio.c
index 22be78e..bd6c35b 100644
--- a/src/lib/libc/stdio.c
+++ b/src/lib/libc/stdio.c
@@ -60,4 +60,156 @@ int printf(const char* fmt, ...) {
 	return puts(buffer);
 }
 
+// ==================
+// BELOW IS TODO
+// ==================
+
+
+int fgetc(FILE *stream) {
+	// TODO
+	return 0;
+}
+char *fgets(char *s, int size, FILE *stream) {
+	// TODO
+	return 0;
+}
+int getc(FILE *stream) {
+	// TODO
+	return 0;
+}
+int ungetc(int c, FILE *stream) {
+	// TODO
+	return 0;
+}
+
+int fputc(int c, FILE *stream) {
+	// TODO
+	return 0;
+}
+int fputs(const char *s, FILE *stream) {
+	// TODO
+	return 0;
+}
+int putc(int c, FILE *stream) {
+	// TODO
+	return 0;
+}
+
+FILE *fopen(const char *path, const char *mode) {
+	// TODO
+	return 0;
+}
+FILE *freopen(const char *path, const char *mode, FILE *stream) {
+	// TODO
+	return 0;
+}
+
+void clearerr(FILE *stream) {
+	// TODO
+}
+int feof(FILE *stream) {
+	// TODO
+	return 0;
+}
+int ferror(FILE *stream) {
+	// TODO
+	return 0;
+}
+int fileno(FILE *stream) {
+	// TODO
+	return 0;
+}
+
+
+size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream) {
+	// TODO
+	return 0;
+}
+size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream) {
+	// TODO
+	return 0;
+}
+
+int fflush(FILE* f) {
+	// TODO
+	return 0;
+}
+int fclose(FILE* f) {
+	// TODO
+	return 0;
+}
+
+FILE *stdin = 0;
+FILE *stdout = 0;
+FILE *stderr = 0;
+
+void setbuf(FILE *stream, char *buf) {
+	// TODO
+}
+void setbuffer(FILE *stream, char *buf, size_t size) {
+	// TODO
+}
+void setlinebuf(FILE *stream) {
+	// TODO
+}
+int setvbuf(FILE *stream, char *buf, int mode, size_t size) {
+	// TODO
+	return 0;
+}
+
+
+int fseek(FILE *stream, long offset, int whence) {
+	// TODO
+	return 0;
+}
+long ftell(FILE *stream) {
+	// TODO
+	return 0;
+}
+void rewind(FILE *stream) {
+	// TODO
+}
+int fgetpos(FILE *stream, fpos_t *pos) {
+	// TODO
+	return 0;
+}
+int fsetpos(FILE *stream, const fpos_t *pos) {
+	// TODO
+	return 0;
+}
+
+FILE *tmpfile(void) {
+	// TODO
+	return 0;
+}
+char *tmpnam(char *s) {
+	// TODO
+	return 0;
+}
+
+int rename(const char *old, const char *new) {
+	// TODO
+	return 0;
+}
+int remove(const char *pathname) {
+	// TODO
+	return 0;
+}
+
+
+
+int fprintf(FILE *stream, const char *format, ...) {
+	// TODO
+	return 0;
+}
+int dprintf(int fd, const char *format, ...) {
+	// TODO
+	return 0;
+}
+int sprintf(char *str, const char *format, ...) {
+	// TODO
+	return 0;
+}
+
+
 /* vim: set ts=4 sw=4 tw=0 noet :*/
diff --git a/src/lib/libc/stdlib.c b/src/lib/libc/stdlib.c
new file mode 100644
index 0000000..d8598dd
--- /dev/null
+++ b/src/lib/libc/stdlib.c
@@ -0,0 +1,80 @@
+#include <stdlib.h>
+#include <ctype.h>
+
+#include <kogata/debug.h>
+
+int rand(void) {
+	return 0;		// TODO
+}
+
+void srand(unsigned int seed) {
+	//TODO
+}
+
+void abort() {
+	PANIC("Aborted.");
+}
+
+float strtof(const char *nptr, const char **endptr) {
+	return (float)strtod(nptr, endptr);
+}
+double strtod(const char *nptr, const char **endptr) {
+	// TODO: better (inf, nan, ...)
+
+	const char* p = nptr;
+	while (isspace(*p)) p++;
+
+	double val = 0;
+	double sign = 1;
+	if (*p == '-') sign = -1;
+	if (*p == '-' || *p == '+') p++;
+	while (isdigit(*p)) {
+		val = val*10. + (double)((int)*p - '0');
+		p++;
+	}
+	if (*p == '.') {
+		p++;
+		double fac = 0.1;
+		while (isdigit(*p)) {
+			val += fac * (double)((int)*p - '0');
+			fac /= 10.;
+			p++;
+		}
+	}
+	if (*p == 'e' || *p == 'E') {
+		p++;
+		int exp = 0;
+		int sexp = 1;
+		if (*p == '-') sexp = -1;
+		if (*p == '-' || *p =='+') p++;
+		while (isdigit(*p)) {
+			exp = exp * 10 + (*p - '0');
+			p++;
+		}
+		if (sexp == 1) {
+			for (int i = 0; i < exp; i++) val *= 10;
+		} else {
+			for (int i = 0; i < exp; i++) val /= 10;
+		}
+	}
+	if (endptr != NULL) *endptr = p-1;
+
+	return val * sign;
+}
+
+char *getenv(const char *name) {
+	// TODO
+	return 0;
+}
+
+int system(const char *command) {
+	// TODO
+	return -1;
+}
+
+int abs(int j) {
+	if (j < 0) return -j;
+	return j;
+}
+
+/* vim: set sts=0 ts=4 sw=4 tw=0 noet :*/
diff --git a/src/lib/libc/time.c b/src/lib/libc/time.c
new file mode 100644
index 0000000..c10d071
--- /dev/null
+++ b/src/lib/libc/time.c
@@ -0,0 +1,50 @@
+#include <time.h>
+
+time_t time(time_t* t) {
+	// TODO
+	return 0;
+}
+double difftime(time_t time1, time_t time0) {
+	// TODO
+	return 0;
+}
+
+char *asctime(const struct tm *tm) {
+	// TODO --
+	return 0;
+}
+
+char *ctime(const time_t *timep) {
+	// TODO --
+	return 0;
+}
+
+struct tm *gmtime(const time_t *timep) {
+	// TODO
+	return 0;
+}
+
+struct tm *localtime(const time_t *timep) {
+	// TODO
+	return 0;
+}
+
+time_t mktime(struct tm *tm) {
+	// TODO
+	return 0;
+}
+
+size_t strftime(char *s, size_t max, const char *format, const struct tm *tm) {
+	// TODO
+	return 0;
+}
+
+
+clock_t clock(void) {
+	// TODO
+	return 0;
+}
+
+
+
+/* vim: set sts=0 ts=4 sw=4 tw=0 noet :*/