nasmlib.h

   1 /* nasmlib.h    header file for nasmlib.c
   2  *
   3  * The Netwide Assembler is copyright (C) 1996 Simon Tatham and
   4  * Julian Hall. All rights reserved. The software is
   5  * redistributable under the license given in the file "LICENSE"
   6  * distributed in the NASM archive.
   7  */
   8
   9 #ifndef NASM_NASMLIB_H
  10 #define NASM_NASMLIB_H
  11
  12 #include "compiler.h"
  13
  14 #include <inttypes.h>
  15 #include <stdio.h>
  16 #include <string.h>
  17 #ifdef HAVE_STRINGS_H
  18 #include <strings.h>
  19 #endif
  20
  21 /*
  22  * tolower table -- avoids a function call on some platforms.
  23  * NOTE: unlike the tolower() function in ctype, EOF is *NOT*
  24  * a permitted value, for obvious reasons.
  25  */
  26 void tolower_init(void);
  27 extern unsigned char nasm_tolower_tab[256];
  28 #define nasm_tolower(x) nasm_tolower_tab[(unsigned char)(x)]
  29
  30 /* Wrappers around <ctype.h> functions */
  31 /* These are only valid for values that cannot include EOF */
  32 #define nasm_isspace(x)  isspace((unsigned char)(x))
  33 #define nasm_isalpha(x)  isalpha((unsigned char)(x))
  34 #define nasm_isdigit(x)  isdigit((unsigned char)(x))
  35 #define nasm_isalnum(x)  isalnum((unsigned char)(x))
  36 #define nasm_isxdigit(x) isxdigit((unsigned char)(x))
  37
  38 /*
  39  * If this is defined, the wrappers around malloc et al will
  40  * transform into logging variants, which will cause NASM to create
  41  * a file called `malloc.log' when run, and spew details of all its
  42  * memory management into that. That can then be analysed to detect
  43  * memory leaks and potentially other problems too.
  44  */
  45 /* #define LOGALLOC */
  46
  47 /*
  48  * -------------------------
  49  * Error reporting functions
  50  * -------------------------
  51  */
  52
  53 /*
  54  * An error reporting function should look like this.
  55  */
  56 typedef void (*efunc) (int severity, const char *fmt, ...);
  57 extern efunc nasm_malloc_error;
  58
  59 /*
  60  * These are the error severity codes which get passed as the first
  61  * argument to an efunc.
  62  */
  63
  64 #define ERR_DEBUG       0x00000008      /* put out debugging message */
  65 #define ERR_WARNING     0x00000000      /* warn only: no further action */
  66 #define ERR_NONFATAL    0x00000001      /* terminate assembly after phase */
  67 #define ERR_FATAL       0x00000002      /* instantly fatal: exit with error */
  68 #define ERR_PANIC       0x00000003      /* internal error: panic instantly
  69                                          * and dump core for reference */
  70 #define ERR_MASK        0x0000000F      /* mask off the above codes */
  71 #define ERR_NOFILE      0x00000010      /* don't give source file name/line */
  72 #define ERR_USAGE       0x00000020      /* print a usage message */
  73 #define ERR_PASS1       0x00000040      /* only print this error on pass one */
  74 #define ERR_PASS2       0x00000080
  75 #define ERR_NO_SEVERITY 0x00000100      /* suppress printing severity */
  76
  77 /*
  78  * These codes define specific types of suppressible warning.
  79  */
  80
  81 #define ERR_WARN_MASK   0xFFFFF000      /* the mask for this feature */
  82 #define ERR_WARN_SHR    12               /* how far to shift right */
  83
  84 #define WARN(x) ((x) << ERR_WARN_SHR)
  85
  86 #define ERR_WARN_MNP            WARN( 1) /* macro-num-parameters warning */
  87 #define ERR_WARN_MSR            WARN( 2) /* macro self-reference */
  88 #define ERR_WARN_MDP            WARN( 3) /* macro default parameters check */
  89 #define ERR_WARN_OL             WARN( 4) /* orphan label (no colon, and
  90                                           * alone on line) */
  91 #define ERR_WARN_NOV            WARN( 5) /* numeric overflow */
  92 #define ERR_WARN_GNUELF         WARN( 6) /* using GNU ELF extensions */
  93 #define ERR_WARN_FL_OVERFLOW    WARN( 7) /* FP overflow */
  94 #define ERR_WARN_FL_DENORM      WARN( 8) /* FP denormal */
  95 #define ERR_WARN_FL_UNDERFLOW   WARN( 9) /* FP underflow */
  96 #define ERR_WARN_FL_TOOLONG     WARN(10) /* FP too many digits */
  97 #define ERR_WARN_USER           WARN(11) /* %warning directives */
  98 #define ERR_WARN_MAX            11       /* the highest numbered one */
  99
 100 /*
 101  * Wrappers around malloc, realloc and free. nasm_malloc will
 102  * fatal-error and die rather than return NULL; nasm_realloc will
 103  * do likewise, and will also guarantee to work right on being
 104  * passed a NULL pointer; nasm_free will do nothing if it is passed
 105  * a NULL pointer.
 106  */
 107 void nasm_set_malloc_error(efunc);
 108 #ifndef LOGALLOC
 109 void *nasm_malloc(size_t);
 110 void *nasm_zalloc(size_t);
 111 void *nasm_realloc(void *, size_t);
 112 void nasm_free(void *);
 113 char *nasm_strdup(const char *);
 114 char *nasm_strndup(char *, size_t);
 115 #else
 116 void *nasm_malloc_log(char *, int, size_t);
 117 void *nasm_zalloc_log(char *, int, size_t);
 118 void *nasm_realloc_log(char *, int, void *, size_t);
 119 void nasm_free_log(char *, int, void *);
 120 char *nasm_strdup_log(char *, int, const char *);
 121 char *nasm_strndup_log(char *, int, char *, size_t);
 122 #define nasm_malloc(x) nasm_malloc_log(__FILE__,__LINE__,x)
 123 #define nasm_zalloc(x) nasm_zalloc_log(__FILE__,__LINE__,x)
 124 #define nasm_realloc(x,y) nasm_realloc_log(__FILE__,__LINE__,x,y)
 125 #define nasm_free(x) nasm_free_log(__FILE__,__LINE__,x)
 126 #define nasm_strdup(x) nasm_strdup_log(__FILE__,__LINE__,x)
 127 #define nasm_strndup(x,y) nasm_strndup_log(__FILE__,__LINE__,x,y)
 128 #endif
 129
 130 /*
 131  * ANSI doesn't guarantee the presence of `stricmp' or
 132  * `strcasecmp'.
 133  */
 134 #if defined(HAVE_STRCASECMP)
 135 #define nasm_stricmp strcasecmp
 136 #elif defined(HAVE_STRICMP)
 137 #define nasm_stricmp stricmp
 138 #else
 139 int nasm_stricmp(const char *, const char *);
 140 #endif
 141
 142 #if defined(HAVE_STRNCASECMP)
 143 #define nasm_strnicmp strncasecmp
 144 #elif defined(HAVE_STRNICMP)
 145 #define nasm_strnicmp strnicmp
 146 #else
 147 int nasm_strnicmp(const char *, const char *, size_t);
 148 #endif
 149
 150 int nasm_memicmp(const char *, const char *, size_t);
 151
 152 #if defined(HAVE_STRSEP)
 153 #define nasm_strsep strsep
 154 #else
 155 char *nasm_strsep(char **stringp, const char *delim);
 156 #endif
 157
 158
 159 /*
 160  * Convert a string into a number, using NASM number rules. Sets
 161  * `*error' to true if an error occurs, and false otherwise.
 162  */
 163 int64_t readnum(char *str, bool *error);
 164
 165 /*
 166  * Convert a character constant into a number. Sets
 167  * `*warn' to true if an overflow occurs, and false otherwise.
 168  * str points to and length covers the middle of the string,
 169  * without the quotes.
 170  */
 171 int64_t readstrnum(char *str, int length, bool *warn);
 172
 173 /*
 174  * seg_init: Initialise the segment-number allocator.
 175  * seg_alloc: allocate a hitherto unused segment number.
 176  */
 177 void seg_init(void);
 178 int32_t seg_alloc(void);
 179
 180 /*
 181  * many output formats will be able to make use of this: a standard
 182  * function to add an extension to the name of the input file
 183  */
 184 #ifdef NASM_NASM_H
 185 void standard_extension(char *inname, char *outname, char *extension,
 186                         efunc error);
 187 #endif
 188
 189 /*
 190  * Utility macros...
 191  *
 192  * This is a useful #define which I keep meaning to use more often:
 193  * the number of elements of a statically defined array.
 194  */
 195
 196 #define elements(x)     ( sizeof(x) / sizeof(*(x)) )
 197
 198 /*
 199  * some handy macros that will probably be of use in more than one
 200  * output format: convert integers into little-endian byte packed
 201  * format in memory
 202  */
 203
 204 #if X86_MEMORY
 205
 206 #define WRITECHAR(p,v)                          \
 207     do {                                        \
 208         *(uint8_t *)(p) = (v);                  \
 209         (p) += 1;                               \
 210     } while (0)
 211
 212 #define WRITESHORT(p,v)                         \
 213     do {                                        \
 214         *(uint16_t *)(p) = (v);                 \
 215         (p) += 2;                               \
 216     } while (0)
 217
 218 #define WRITELONG(p,v)                          \
 219     do {                                        \
 220         *(uint32_t *)(p) = (v);                 \
 221         (p) += 4;                               \
 222     } while (0)
 223
 224 #define WRITEDLONG(p,v)                         \
 225     do {                                        \
 226         *(uint64_t *)(p) = (v);                 \
 227         (p) += 8;                               \
 228     } while (0)
 229
 230 #define WRITEADDR(p,v,s)                        \
 231     do {                                        \
 232         uint64_t _wa_v = (v);                   \
 233         memcpy((p), &_wa_v, (s));               \
 234         (p) += (s);                             \
 235     } while (0)
 236
 237 #else /* !X86_MEMORY */
 238
 239 #define WRITECHAR(p,v)                          \
 240     do {                                        \
 241         uint8_t *_wc_p = (uint8_t *)(p);        \
 242         uint8_t _wc_v = (v);                    \
 243         _wc_p[0] = _wc_v;                       \
 244         (p) = (void *)(_wc_p + 1);              \
 245     } while (0)
 246
 247 #define WRITESHORT(p,v)                         \
 248     do {                                        \
 249         uint8_t *_ws_p = (uint8_t *)(p);        \
 250         uint16_t _ws_v = (v);                   \
 251         _ws_p[0] = _ws_v;                       \
 252         _ws_p[1] = _ws_v >> 8;                  \
 253         (p) = (void *)(_ws_p + 2);              \
 254     } while (0)
 255
 256 #define WRITELONG(p,v)                          \
 257     do {                                        \
 258         uint8_t *_wl_p = (uint8_t *)(p);        \
 259         uint32_t _wl_v = (v);                   \
 260         _wl_p[0] = _wl_v;                       \
 261         _wl_p[1] = _wl_v >> 8;                  \
 262         _wl_p[2] = _wl_v >> 16;                 \
 263         _wl_p[3] = _wl_v >> 24;                 \
 264         (p) = (void *)(_wl_p + 4);              \
 265     } while (0)
 266
 267 #define WRITEDLONG(p,v)                         \
 268     do {                                        \
 269         uint8_t *_wq_p = (uint8_t *)(p);        \
 270         uint64_t _wq_v = (v);                   \
 271         _wq_p[0] = _wq_v;                       \
 272         _wq_p[1] = _wq_v >> 8;                  \
 273         _wq_p[2] = _wq_v >> 16;                 \
 274         _wq_p[3] = _wq_v >> 24;                 \
 275         _wq_p[4] = _wq_v >> 32;                 \
 276         _wq_p[5] = _wq_v >> 40;                 \
 277         _wq_p[6] = _wq_v >> 48;                 \
 278         _wq_p[7] = _wq_v >> 56;                 \
 279         (p) = (void *)(_wq_p + 8);              \
 280     } while (0)
 281
 282 #define WRITEADDR(p,v,s)                        \
 283     do {                                        \
 284         int _wa_s = (s);                        \
 285         uint64_t _wa_v = (v);                   \
 286         while (_wa_s--) {                       \
 287             WRITECHAR(p,_wa_v);                 \
 288             _wa_v >>= 8;                        \
 289         }                                       \
 290     } while(0)
 291
 292 #endif
 293
 294 /*
 295  * and routines to do the same thing to a file
 296  */
 297 #define fwriteint8_t(d,f) putc(d,f)
 298 void fwriteint16_t(uint16_t data, FILE * fp);
 299 void fwriteint32_t(uint32_t data, FILE * fp);
 300 void fwriteint64_t(uint64_t data, FILE * fp);
 301 void fwriteaddr(uint64_t data, int size, FILE * fp);
 302
 303 /*
 304  * Binary search routine. Returns index into `array' of an entry
 305  * matching `string', or <0 if no match. `array' is taken to
 306  * contain `size' elements.
 307  *
 308  * bsi() is case sensitive, bsii() is case insensitive.
 309  */
 310 int bsi(const char *string, const char **array, int size);
 311 int bsii(const char *string, const char **array, int size);
 312
 313 char *src_set_fname(char *newname);
 314 int32_t src_set_linnum(int32_t newline);
 315 int32_t src_get_linnum(void);
 316 /*
 317  * src_get may be used if you simply want to know the source file and line.
 318  * It is also used if you maintain private status about the source location
 319  * It return 0 if the information was the same as the last time you
 320  * checked, -1 if the name changed and (new-old) if just the line changed.
 321  */
 322 int src_get(int32_t *xline, char **xname);
 323
 324 char *nasm_strcat(const char *one, const char *two);
 325
 326 void null_debug_routine(const char *directive, const char *params);
 327 extern struct dfmt null_debug_form;
 328 extern struct dfmt *null_debug_arr[2];
 329
 330 const char *prefix_name(int);
 331
 332 #define ZERO_BUF_SIZE   4096
 333 extern const uint8_t zero_buffer[ZERO_BUF_SIZE];
 334 size_t fwritezero(size_t bytes, FILE *fp);
 335
 336 #endif