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-rw-r--r--vere/ext/nasm/include/nasmlib.h467
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diff --git a/vere/ext/nasm/include/nasmlib.h b/vere/ext/nasm/include/nasmlib.h
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+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 1996-2020 The NASM Authors - All Rights Reserved
+ * See the file AUTHORS included with the NASM distribution for
+ * the specific copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * nasmlib.h header file for nasmlib.c
+ */
+
+#ifndef NASM_NASMLIB_H
+#define NASM_NASMLIB_H
+
+#include "compiler.h"
+#include "bytesex.h"
+
+/*
+ * Useful construct for private values
+ */
+union intorptr {
+ int64_t i;
+ uint64_t u;
+ size_t s;
+ void *p;
+ const void *cp;
+ uintptr_t up;
+};
+typedef union intorptr intorptr;
+
+/*
+ * Wrappers around malloc, realloc, free and a few more. nasm_malloc
+ * will fatal-error and die rather than return NULL; nasm_realloc will
+ * do likewise, and will also guarantee to work right on being passed
+ * a NULL pointer; nasm_free will do nothing if it is passed a NULL
+ * pointer.
+ */
+void * safe_malloc(1) nasm_malloc(size_t);
+void * safe_malloc(1) nasm_zalloc(size_t);
+void * safe_malloc2(1,2) nasm_calloc(size_t, size_t);
+void * safe_realloc(2) nasm_realloc(void *, size_t);
+void nasm_free(void *);
+char * safe_alloc nasm_strdup(const char *);
+char * safe_alloc nasm_strndup(const char *, size_t);
+char * safe_alloc nasm_strcat(const char *one, const char *two);
+char * safe_alloc end_with_null nasm_strcatn(const char *one, ...);
+
+/*
+ * nasm_[v]asprintf() are variants of the semi-standard [v]asprintf()
+ * functions, except that we return the pointer instead of a count.
+ * The size of the string (including the final NUL!) is available
+ * by calling nasm_aprintf_size() afterwards.
+ *
+ * nasm_[v]axprintf() are similar, but allocates a user-defined amount
+ * of storage before the string, and returns a pointer to the
+ * allocated buffer. The value of nasm_aprintf_size() does *not* include
+ * this additional storage.
+ */
+char * safe_alloc printf_func(1, 2) nasm_asprintf(const char *fmt, ...);
+char * safe_alloc vprintf_func(1) nasm_vasprintf(const char *fmt, va_list ap);
+void * safe_alloc printf_func(2, 3) nasm_axprintf(size_t extra, const char *fmt, ...);
+void * safe_alloc vprintf_func(2) nasm_vaxprintf(size_t extra, const char *fmt, va_list ap);
+
+/*
+ * nasm_last_string_len() returns the length of the last string allocated
+ * by [v]asprintf, nasm_strdup, nasm_strcat, or nasm_strcatn.
+ *
+ * nasm_last_string_size() returns the equivalent size including the
+ * final NUL.
+ */
+static inline size_t nasm_last_string_len(void)
+{
+ extern size_t _nasm_last_string_size;
+ return _nasm_last_string_size - 1;
+}
+static inline size_t nasm_last_string_size(void)
+{
+ extern size_t _nasm_last_string_size;
+ return _nasm_last_string_size;
+}
+
+/* Assert the argument is a pointer without evaluating it */
+#define nasm_assert_pointer(p) ((void)sizeof(*(p)))
+
+#define nasm_new(p) ((p) = nasm_zalloc(sizeof(*(p))))
+#define nasm_newn(p,n) ((p) = nasm_calloc((n), sizeof(*(p))))
+/*
+ * This is broken on platforms where there are pointers which don't
+ * match void * in their internal layout. It unfortunately also
+ * loses any "const" part of the argument, although hopefully the
+ * compiler will warn in that case.
+ */
+#define nasm_delete(p) \
+ do { \
+ void **_pp = (void **)&(p); \
+ nasm_assert_pointer(p); \
+ nasm_free(*_pp); \
+ *_pp = NULL; \
+ } while (0)
+#define nasm_zero(x) (memset(&(x), 0, sizeof(x)))
+#define nasm_zeron(p,n) (memset((p), 0, (n)*sizeof(*(p))))
+
+/*
+ * Wrappers around fread()/fwrite() which fatal-errors on failure.
+ * For fread(), only use this if EOF is supposed to be a fatal error!
+ */
+void nasm_read(void *, size_t, FILE *);
+void nasm_write(const void *, size_t, FILE *);
+
+/*
+ * NASM failure at build time if the argument is false
+ */
+#ifdef static_assert
+# define nasm_static_assert(x) static_assert((x), #x)
+#elif defined(HAVE_FUNC_ATTRIBUTE_ERROR) && defined(__OPTIMIZE__)
+# define nasm_static_assert(x) \
+ do { \
+ if (!(x)) { \
+ extern void __attribute__((error("assertion " #x " failed"))) \
+ _nasm_static_fail(void); \
+ _nasm_static_fail(); \
+ } \
+ } while (0)
+#else
+/* See http://www.drdobbs.com/compile-time-assertions/184401873 */
+# define nasm_static_assert(x) \
+ do { enum { _static_assert_failed = 1/(!!(x)) }; } while (0)
+#endif
+
+/*
+ * conditional static assert, if we know it is possible to determine
+ * the assert value at compile time. Since if_constant triggers
+ * pedantic warnings on gcc, turn them off explicitly around this code.
+ */
+#ifdef static_assert
+# define nasm_try_static_assert(x) \
+ do { \
+ not_pedantic_start \
+ static_assert(if_constant(x, true), #x); \
+ not_pedantic_end \
+ } while (0)
+#elif defined(HAVE_FUNC_ATTRIBUTE_ERROR) && defined(__OPTIMIZE__)
+# define nasm_try_static_assert(x) \
+ do { \
+ if (!if_constant(x, true)) { \
+ extern void __attribute__((error("assertion " #x " failed"))) \
+ _nasm_static_fail(void); \
+ _nasm_static_fail(); \
+ } \
+ } while (0)
+#else
+# define nasm_try_static_assert(x) ((void)0)
+#endif
+
+/*
+ * NASM assert failure
+ */
+fatal_func nasm_assert_failed(const char *, int, const char *);
+#define nasm_assert(x) \
+ do { \
+ nasm_try_static_assert(x); \
+ if (unlikely(!(x))) \
+ nasm_assert_failed(__FILE__,__LINE__,#x); \
+ } while (0)
+
+/* Utility function to generate a string for an invalid enum */
+const char *invalid_enum_str(int);
+
+/*
+ * ANSI doesn't guarantee the presence of `stricmp' or
+ * `strcasecmp'.
+ */
+#if defined(HAVE_STRCASECMP)
+#define nasm_stricmp strcasecmp
+#elif defined(HAVE_STRICMP)
+#define nasm_stricmp stricmp
+#else
+int pure_func nasm_stricmp(const char *, const char *);
+#endif
+
+#if defined(HAVE_STRNCASECMP)
+#define nasm_strnicmp strncasecmp
+#elif defined(HAVE_STRNICMP)
+#define nasm_strnicmp strnicmp
+#else
+int pure_func nasm_strnicmp(const char *, const char *, size_t);
+#endif
+
+int pure_func nasm_memicmp(const char *, const char *, size_t);
+
+#if defined(HAVE_STRSEP)
+#define nasm_strsep strsep
+#else
+char *nasm_strsep(char **stringp, const char *delim);
+#endif
+
+#ifndef HAVE_DECL_STRNLEN
+size_t pure_func strnlen(const char *, size_t);
+#endif
+
+/* This returns the numeric value of a given 'digit'; no check for validity */
+static inline unsigned int numvalue(unsigned char c)
+{
+ c |= 0x20;
+ return c >= 'a' ? c - 'a' + 10 : c - '0';
+}
+
+/*
+ * Convert a string into a number, using NASM number rules. Sets
+ * `*error' to true if an error occurs, and false otherwise.
+ */
+int64_t readnum(const char *str, bool *error);
+
+/*
+ * Convert a character constant into a number. Sets
+ * `*warn' to true if an overflow occurs, and false otherwise.
+ * str points to and length covers the middle of the string,
+ * without the quotes.
+ */
+int64_t readstrnum(char *str, int length, bool *warn);
+
+/*
+ * seg_alloc: allocate a hitherto unused segment number.
+ */
+int32_t seg_alloc(void);
+
+/*
+ * Add/replace or remove an extension to the end of a filename
+ */
+const char *filename_set_extension(const char *inname, const char *extension);
+
+/*
+ * Utility macros...
+ *
+ * This is a useful #define which I keep meaning to use more often:
+ * the number of elements of a statically defined array.
+ */
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+/*
+ * List handling
+ *
+ * list_for_each - regular iterator over list
+ * list_for_each_safe - the same but safe against list items removal
+ * list_last - find the last element in a list
+ * list_reverse - reverse the order of a list
+ *
+ * Arguments named with _ + single letter should be temp variables
+ * of the appropriate pointer type.
+ */
+#define list_for_each(pos, head) \
+ for (pos = head; pos; pos = pos->next)
+#define list_for_each_safe(pos, _n, head) \
+ for (pos = head, _n = (pos ? pos->next : NULL); pos; \
+ pos = _n, _n = (_n ? _n->next : NULL))
+#define list_last(pos, head) \
+ for (pos = head; pos && pos->next; pos = pos->next) \
+ ;
+#define list_reverse(head) \
+ do { \
+ void *_p, *_n; \
+ if (!head || !head->next) \
+ break; \
+ _p = NULL; \
+ while (head) { \
+ _n = head->next; \
+ head->next = _p; \
+ _p = head; \
+ head = _n; \
+ } \
+ head = _p; \
+ } while (0)
+
+/*
+ * Power of 2 align helpers
+ */
+#undef ALIGN_MASK /* Some BSD flavors define these in system headers */
+#undef ALIGN
+#define ALIGN_MASK(v, mask) (((v) + (mask)) & ~(mask))
+#define ALIGN(v, a) ALIGN_MASK(v, (a) - 1)
+#define IS_ALIGNED(v, a) (((v) & ((a) - 1)) == 0)
+
+/*
+ * Routines to write littleendian data to a file
+ */
+#define fwriteint8_t(d,f) putc(d,f)
+void fwriteint16_t(uint16_t data, FILE * fp);
+void fwriteint32_t(uint32_t data, FILE * fp);
+void fwriteint64_t(uint64_t data, FILE * fp);
+void fwriteaddr(uint64_t data, int size, FILE * fp);
+
+/*
+ * Binary search routine. Returns index into `array' of an entry
+ * matching `string', or <0 if no match. `array' is taken to
+ * contain `size' elements.
+ *
+ * bsi() is case sensitive, bsii() is case insensitive.
+ */
+int bsi(const char *string, const char **array, int size);
+int bsii(const char *string, const char **array, int size);
+
+/*
+ * Convenient string processing helper routines
+ */
+char *nasm_skip_spaces(const char *p);
+char *nasm_skip_word(const char *p);
+char *nasm_zap_spaces_fwd(char *p);
+char *nasm_zap_spaces_rev(char *p);
+char *nasm_trim_spaces(char *p);
+char *nasm_get_word(char *p, char **tail);
+char *nasm_opt_val(char *p, char **opt, char **val);
+
+/*
+ * Converts a relative pathname rel_path into an absolute path name.
+ *
+ * The buffer returned must be freed by the caller
+ */
+char * safe_alloc nasm_realpath(const char *rel_path);
+
+/*
+ * Path-splitting and merging functions
+ */
+char * safe_alloc nasm_dirname(const char *path);
+char * safe_alloc nasm_basename(const char *path);
+char * safe_alloc nasm_catfile(const char *dir, const char *path);
+
+const char * pure_func prefix_name(int);
+
+/*
+ * Wrappers around fopen()... for future change to a dedicated structure
+ */
+enum file_flags {
+ NF_BINARY = 0x00000000, /* Binary file (default) */
+ NF_TEXT = 0x00000001, /* Text file */
+ NF_NONFATAL = 0x00000000, /* Don't die on open failure (default) */
+ NF_FATAL = 0x00000002, /* Die on open failure */
+ NF_FORMAP = 0x00000004, /* Intended to use nasm_map_file() */
+ NF_IONBF = 0x00000010, /* Force unbuffered stdio */
+ NF_IOLBF = 0x00000020, /* Force line buffered stdio */
+ NF_IOFBF = 0000000030 /* Force fully buffered stdio */
+};
+#define NF_BUF_MASK 0x30
+
+FILE *nasm_open_read(const char *filename, enum file_flags flags);
+FILE *nasm_open_write(const char *filename, enum file_flags flags);
+
+void nasm_set_binary_mode(FILE *f);
+
+/* Probe for existence of a file */
+bool nasm_file_exists(const char *filename);
+
+#define ZERO_BUF_SIZE 65536 /* Default value */
+#if defined(BUFSIZ) && (BUFSIZ > ZERO_BUF_SIZE)
+# undef ZERO_BUF_SIZE
+# define ZERO_BUF_SIZE BUFSIZ
+#endif
+extern const uint8_t zero_buffer[ZERO_BUF_SIZE];
+
+/* Missing fseeko/ftello */
+#ifndef HAVE_FSEEKO
+# undef off_t /* Just in case it is a macro */
+# ifdef HAVE__FSEEKI64
+# define fseeko _fseeki64
+# define ftello _ftelli64
+# define off_t int64_t
+# else
+# define fseeko fseek
+# define ftello ftell
+# define off_t long
+# endif
+#endif
+
+const void *nasm_map_file(FILE *fp, off_t start, off_t len);
+void nasm_unmap_file(const void *p, size_t len);
+off_t nasm_file_size(FILE *f);
+off_t nasm_file_size_by_path(const char *pathname);
+bool nasm_file_time(time_t *t, const char *pathname);
+void fwritezero(off_t bytes, FILE *fp);
+
+static inline bool const_func overflow_general(int64_t value, int bytes)
+{
+ int sbit;
+ int64_t vmax, vmin;
+
+ if (bytes >= 8)
+ return false;
+
+ sbit = (bytes << 3) - 1;
+ vmax = ((int64_t)2 << sbit) - 1;
+ vmin = -((int64_t)2 << sbit);
+
+ return value < vmin || value > vmax;
+}
+
+static inline bool const_func overflow_signed(int64_t value, int bytes)
+{
+ int sbit;
+ int64_t vmax, vmin;
+
+ if (bytes >= 8)
+ return false;
+
+ sbit = (bytes << 3) - 1;
+ vmax = ((int64_t)1 << sbit) - 1;
+ vmin = -((int64_t)1 << sbit);
+
+ return value < vmin || value > vmax;
+}
+
+static inline bool const_func overflow_unsigned(int64_t value, int bytes)
+{
+ int sbit;
+ int64_t vmax, vmin;
+
+ if (bytes >= 8)
+ return false;
+
+ sbit = (bytes << 3) - 1;
+ vmax = ((int64_t)2 << sbit) - 1;
+ vmin = 0;
+
+ return value < vmin || value > vmax;
+}
+
+static inline int64_t const_func signed_bits(int64_t value, int bits)
+{
+ if (bits < 64) {
+ value &= ((int64_t)1 << bits) - 1;
+ if (value & (int64_t)1 << (bits - 1))
+ value |= (int64_t)((uint64_t)-1 << bits);
+ }
+ return value;
+}
+
+/* check if value is power of 2 */
+#define is_power2(v) ((v) && ((v) & ((v) - 1)) == 0)
+
+/* try to get the system stack size */
+extern size_t nasm_get_stack_size_limit(void);
+
+#endif
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