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nasm/nasmlib.h
H. Peter Anvin 274cda81f8 Use a hash to keep exactly one copy of each filename around 
The old code for keeping track of source file name and line was
confused as hell about ownership of the strings, and it is pretty
clear we leaked that information all over the place.

Instead, use a hash table to keep a copy of each string as necessary,
and simply make references to a string pool that we keep until the end
of the assembly session.

This pool probably should be unified with the list of dependency
files, and so on, but that is for the development branch.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2016-05-10 03:01:58 -07:00

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/* ----------------------------------------------------------------------- *
*
* Copyright 1996-2016 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 <inttypes.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
/*
* tolower table -- avoids a function call on some platforms.
* NOTE: unlike the tolower() function in ctype, EOF is *NOT*
* a permitted value, for obvious reasons.
*/
void tolower_init(void);
extern unsigned char nasm_tolower_tab[256];
#define nasm_tolower(x) nasm_tolower_tab[(unsigned char)(x)]
/* Wrappers around <ctype.h> functions */
/* These are only valid for values that cannot include EOF */
#define nasm_isspace(x) isspace((unsigned char)(x))
#define nasm_isalpha(x) isalpha((unsigned char)(x))
#define nasm_isdigit(x) isdigit((unsigned char)(x))
#define nasm_isalnum(x) isalnum((unsigned char)(x))
#define nasm_isxdigit(x) isxdigit((unsigned char)(x))
/*
* -------------------------
* Error reporting functions
* -------------------------
*/
/*
* An error reporting function should look like this.
*/
void printf_func(2, 3) nasm_error(int severity, const char *fmt, ...);
no_return printf_func(2, 3) nasm_fatal(int flags, const char *fmt, ...);
no_return printf_func(2, 3) nasm_panic(int flags, const char *fmt, ...);
no_return nasm_panic_from_macro(const char *file, int line);
#define panic() nasm_panic_from_macro(__FILE__, __LINE__);
typedef void (*vefunc) (int severity, const char *fmt, va_list ap);
extern vefunc nasm_verror;
static inline vefunc nasm_set_verror(vefunc ve)
{
vefunc old_verror = nasm_verror;
nasm_verror = ve;
return old_verror;
}
/*
* These are the error severity codes which get passed as the first
* argument to an efunc.
*/
#define ERR_DEBUG 0x00000000 /* put out debugging message */
#define ERR_WARNING 0x00000001 /* warn only: no further action */
#define ERR_NONFATAL 0x00000002 /* terminate assembly after phase */
#define ERR_FATAL 0x00000006 /* instantly fatal: exit with error */
#define ERR_PANIC 0x00000007 /* internal error: panic instantly
* and dump core for reference */
#define ERR_MASK 0x00000007 /* mask off the above codes */
#define ERR_NOFILE 0x00000010 /* don't give source file name/line */
#define ERR_USAGE 0x00000020 /* print a usage message */
#define ERR_PASS1 0x00000040 /* only print this error on pass one */
#define ERR_PASS2 0x00000080
#define ERR_NO_SEVERITY 0x00000100 /* suppress printing severity */
#define ERR_PP_PRECOND 0x00000200 /* for preprocessor use */
#define ERR_PP_LISTMACRO 0x00000400 /* from preproc->error_list_macros() */
/*
* These codes define specific types of suppressible warning.
*/
#define ERR_WARN_MASK 0xFFFFF000 /* the mask for this feature */
#define ERR_WARN_SHR 12 /* how far to shift right */
#define WARN(x) ((x) << ERR_WARN_SHR)
#define WARN_IDX(x) (((x) & ERR_WARN_MASK) >> ERR_WARN_SHR)
#define ERR_WARN_TERM WARN( 0) /* treat warnings as errors */
#define ERR_WARN_MNP WARN( 1) /* macro-num-parameters warning */
#define ERR_WARN_MSR WARN( 2) /* macro self-reference */
#define ERR_WARN_MDP WARN( 3) /* macro default parameters check */
#define ERR_WARN_OL WARN( 4) /* orphan label (no colon, and
* alone on line) */
#define ERR_WARN_NOV WARN( 5) /* numeric overflow */
#define ERR_WARN_GNUELF WARN( 6) /* using GNU ELF extensions */
#define ERR_WARN_FL_OVERFLOW WARN( 7) /* FP overflow */
#define ERR_WARN_FL_DENORM WARN( 8) /* FP denormal */
#define ERR_WARN_FL_UNDERFLOW WARN( 9) /* FP underflow */
#define ERR_WARN_FL_TOOLONG WARN(10) /* FP too many digits */
#define ERR_WARN_USER WARN(11) /* %warning directives */
#define ERR_WARN_LOCK WARN(12) /* bad LOCK prefixes */
#define ERR_WARN_HLE WARN(13) /* bad HLE prefixes */
#define ERR_WARN_BND WARN(14) /* bad BND prefixes */
#define ERR_WARN_ZEXTRELOC WARN(15) /* relocation zero-extended */
#define ERR_WARN_PTR WARN(16) /* not a NASM keyword */
#define ERR_WARN_MAX 16 /* the highest numbered one */
/*
* Wrappers around malloc, realloc and free. 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 *nasm_malloc(size_t);
void *nasm_zalloc(size_t);
void *nasm_realloc(void *, size_t);
void nasm_free(void *);
char *nasm_strdup(const char *);
char *nasm_strndup(const char *, size_t);
/*
* Wrapper around fwrite() which fatal-errors on output failure.
*/
void nasm_write(const void *, size_t, FILE *);
/*
* NASM assert failure
*/
no_return nasm_assert_failed(const char *, int, const char *);
#define nasm_assert(x) \
do { \
if (unlikely(!(x))) \
nasm_assert_failed(__FILE__,__LINE__,#x); \
} while (0)
/*
* NASM failure at build time if x != 0
*/
#define nasm_build_assert(x) (void)(sizeof(char[1-2*!!(x)]))
/*
* 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 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 nasm_strnicmp(const char *, const char *, size_t);
#endif
int 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
/* This returns the numeric value of a given 'digit'. */
#define numvalue(c) ((c) >= 'a' ? (c) - 'a' + 10 : (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(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_init: Initialise the segment-number allocator.
* seg_alloc: allocate a hitherto unused segment number.
*/
void seg_init(void);
int32_t seg_alloc(void);
/*
* many output formats will be able to make use of this: a standard
* function to add an extension to the name of the input file
*/
void standard_extension(char *inname, char *outname, 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
*/
#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, prev, next) \
do { \
if (!head || !head->next) \
break; \
prev = NULL; \
while (head) { \
next = head->next; \
head->next = prev; \
prev = head; \
head = next; \
} \
head = prev; \
} 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)
/*
* some handy macros that will probably be of use in more than one
* output format: convert integers into little-endian byte packed
* format in memory
*/
#if X86_MEMORY
#define WRITECHAR(p,v) \
do { \
*(uint8_t *)(p) = (v); \
(p) += 1; \
} while (0)
#define WRITESHORT(p,v) \
do { \
*(uint16_t *)(p) = (v); \
(p) += 2; \
} while (0)
#define WRITELONG(p,v) \
do { \
*(uint32_t *)(p) = (v); \
(p) += 4; \
} while (0)
#define WRITEDLONG(p,v) \
do { \
*(uint64_t *)(p) = (v); \
(p) += 8; \
} while (0)
#define WRITEADDR(p,v,s) \
do { \
uint64_t _wa_v = (v); \
memcpy((p), &_wa_v, (s)); \
(p) += (s); \
} while (0)
#else /* !X86_MEMORY */
#define WRITECHAR(p,v) \
do { \
uint8_t *_wc_p = (uint8_t *)(p); \
uint8_t _wc_v = (v); \
_wc_p[0] = _wc_v; \
(p) = (void *)(_wc_p + 1); \
} while (0)
#define WRITESHORT(p,v) \
do { \
uint8_t *_ws_p = (uint8_t *)(p); \
uint16_t _ws_v = (v); \
_ws_p[0] = _ws_v; \
_ws_p[1] = _ws_v >> 8; \
(p) = (void *)(_ws_p + 2); \
} while (0)
#define WRITELONG(p,v) \
do { \
uint8_t *_wl_p = (uint8_t *)(p); \
uint32_t _wl_v = (v); \
_wl_p[0] = _wl_v; \
_wl_p[1] = _wl_v >> 8; \
_wl_p[2] = _wl_v >> 16; \
_wl_p[3] = _wl_v >> 24; \
(p) = (void *)(_wl_p + 4); \
} while (0)
#define WRITEDLONG(p,v) \
do { \
uint8_t *_wq_p = (uint8_t *)(p); \
uint64_t _wq_v = (v); \
_wq_p[0] = _wq_v; \
_wq_p[1] = _wq_v >> 8; \
_wq_p[2] = _wq_v >> 16; \
_wq_p[3] = _wq_v >> 24; \
_wq_p[4] = _wq_v >> 32; \
_wq_p[5] = _wq_v >> 40; \
_wq_p[6] = _wq_v >> 48; \
_wq_p[7] = _wq_v >> 56; \
(p) = (void *)(_wq_p + 8); \
} while (0)
#define WRITEADDR(p,v,s) \
do { \
int _wa_s = (s); \
uint64_t _wa_v = (v); \
while (_wa_s--) { \
WRITECHAR(p,_wa_v); \
_wa_v >>= 8; \
} \
} while(0)
#endif
/*
* and routines to do the same thing 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);
/*
* These functions are used to keep track of the source code file and name.
*/
void src_init(void);
void src_free(void);
const char *src_set_fname(const char *newname);
const char *src_get_fname(void);
int32_t src_set_linnum(int32_t newline);
int32_t src_get_linnum(void);
/* Can be used when there is no need for the old information */
void src_set(int32_t line, const char *filename);
/*
* src_get gets both the source file name and line.
* It is also used if you maintain private status about the source location
* It return 0 if the information was the same as the last time you
* checked, -2 if the name changed and (new-old) if just the line changed.
*/
int32_t src_get(int32_t *xline, const char **xname);
char *nasm_strcat(const char *one, const char *two);
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 *nasm_realpath(const char *rel_path);
const char *prefix_name(int);
#define ZERO_BUF_SIZE 4096 /* 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];
void fwritezero(size_t bytes, FILE *fp);
static inline bool 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)1 << sbit);
return value < vmin || value > vmax;
}
static inline bool 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 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 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;
}
int idata_bytes(int opcode);
/* check if value is power of 2 */
#define is_power2(v) ((v) && ((v) & ((v) - 1)) == 0)
/*
* floor(log2(v))
*/
int ilog2_32(uint32_t v);
int ilog2_64(uint64_t v);
/*
* v == 0 ? 0 : is_power2(x) ? ilog2_X(v) : -1
*/
int alignlog2_32(uint32_t v);
int alignlog2_64(uint64_t v);
#endif
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