/* ----------------------------------------------------------------------- * * * 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 */ 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 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 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) { … } static inline size_t nasm_last_string_size(void) { … } /* Assert the argument is a pointer without evaluating it */ #define nasm_assert_pointer(p) … #define nasm_new(p) … #define nasm_newn(p,n) … /* * 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) … #define nasm_zero(x) … #define nasm_zeron(p,n) … /* * 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) … #elif defined(HAVE_FUNC_ATTRIBUTE_ERROR) && defined(__OPTIMIZE__) #define nasm_static_assert … #else /* See http://www.drdobbs.com/compile-time-assertions/184401873 */ #define nasm_static_assert … #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) … #elif defined(HAVE_FUNC_ATTRIBUTE_ERROR) && defined(__OPTIMIZE__) #define nasm_try_static_assert … #else #define nasm_try_static_assert … #endif /* * NASM assert failure */ fatal_func nasm_assert_failed(const char *, int, const char *); #define nasm_assert(x) … /* 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 … #elif defined(HAVE_STRICMP) #define nasm_stricmp … #else int pure_func nasm_stricmp(const char *, const char *); #endif #if defined(HAVE_STRNCASECMP) #define nasm_strnicmp … #elif defined(HAVE_STRNICMP) #define nasm_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 … #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) { … } /* * 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) … /* * 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 */ #define list_for_each(pos, head) … #define list_for_each_safe(pos, n, head) … #define list_last(pos, head) … #define list_reverse(head, prev, next) … /* * Power of 2 align helpers */ #undef ALIGN_MASK /* Some BSD flavors define these in system headers */ #undef ALIGN #define ALIGN_MASK(v, mask) … #define ALIGN(v, a) … #define IS_ALIGNED(v, a) … /* * Routines to write littleendian data to a file */ #define fwriteint8_t(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 { … }; #define NF_BUF_MASK … 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 … #if defined(BUFSIZ) && (BUFSIZ > ZERO_BUF_SIZE) # undef ZERO_BUF_SIZE #define ZERO_BUF_SIZE … #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 … #define ftello … #define off_t … # else #define fseeko … #define ftello … #define off_t … # 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) { … } static inline bool const_func overflow_signed(int64_t value, int bytes) { … } static inline bool const_func overflow_unsigned(int64_t value, int bytes) { … } static inline int64_t const_func signed_bits(int64_t value, int bits) { … } /* check if value is power of 2 */ #define is_power2(v) … /* try to get the system stack size */ extern size_t nasm_get_stack_size_limit(void); #endif
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