Add project files (part 1/2)

Co-Authored-By: Claude Sonnet 5 <[email protected]>

third_party/minicrt/include/assert.h

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+#pragma once
+#define assert(x) ((void)0)

third_party/minicrt/include/math.h

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+#pragma once
+#ifdef __cplusplus
+extern "C" {
+#endif
+double sin(double); double cos(double); double tan(double); double acos(double); double asin(double); double atan(double);
+double atan2(double, double); double sqrt(double); double pow(double, double); double fabs(double); double floor(double);
+double ceil(double); double fmod(double, double); double log(double); double exp(double); double ldexp(double, int);
+float sinf(float); float cosf(float); float tanf(float); float acosf(float); float atan2f(float, float); float sqrtf(float);
+float expf(float); float powf(float, float); float fabsf(float); float floorf(float); float ceilf(float); float fmodf(float, float);
+#ifdef __cplusplus
+}
+#endif

third_party/minicrt/include/memory.h

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+#pragma once
+#include <string.h>

third_party/minicrt/include/stdio.h

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+#pragma once
+#include <stddef.h>
+#include <stdarg.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+typedef struct _iobuf FILE;
+FILE *fopen(const char *, const char *);
+int fclose(FILE *);
+size_t fread(void *, size_t, size_t, FILE *);
+int fseek(FILE *, long, int);
+int feof(FILE *);
+int fopen_s(FILE **, const char *, const char *);
+long ftell(FILE *);
+int sprintf(char *, const char *, ...);
+int snprintf(char *, size_t, const char *, ...);
+// diagnostics printing of the bundled libraries is not wanted in the client
+#define printf(...) ((void)0)
+#define SEEK_SET 0
+#define SEEK_CUR 1
+#define SEEK_END 2
+#ifdef __cplusplus
+}
+#endif

third_party/minicrt/include/stdlib.h

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+// Declarations of the UCRT functions the bundled C libraries (NanoVG, stb) use; the cross build has no Windows SDK.
+#pragma once
+#include <stddef.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+void *malloc(size_t);
+void *calloc(size_t, size_t);
+void *realloc(void *, size_t);
+void free(void *);
+void qsort(void *, size_t, size_t, int (*)(const void *, const void *));
+int abs(int);
+double strtod(const char *, char **);
+long strtol(const char *, char **, int);
+#ifdef __cplusplus
+}
+#endif

third_party/minicrt/include/string.h

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+#pragma once
+#include <stddef.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+void *memcpy(void *, const void *, size_t);
+void *memmove(void *, const void *, size_t);
+void *memset(void *, int, size_t);
+int memcmp(const void *, const void *, size_t);
+size_t strlen(const char *);
+int strcmp(const char *, const char *);
+int strncmp(const char *, const char *, size_t);
+char *strcpy(char *, const char *);
+char *strncpy(char *, const char *, size_t);
+char *strchr(const char *, int);
+#ifdef __cplusplus
+}
+#endif