diff options
| author | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2001-02-20 15:15:33 -0300 |
|---|---|---|
| committer | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2001-02-20 15:15:33 -0300 |
| commit | 099442c41f2cec6122690e6c8f2e11327613e6f6 (patch) | |
| tree | 73599b274ea4a9b96906ff8160eeb4a524702a8e /llimits.h | |
| parent | 27600fe87a6fafdfd4ddddeb390591fe749b480f (diff) | |
| download | lua-099442c41f2cec6122690e6c8f2e11327613e6f6.tar.gz lua-099442c41f2cec6122690e6c8f2e11327613e6f6.tar.bz2 lua-099442c41f2cec6122690e6c8f2e11327613e6f6.zip | |
better separation between basic types
Diffstat (limited to 'llimits.h')
| -rw-r--r-- | llimits.h | 34 |
1 files changed, 26 insertions, 8 deletions
| @@ -1,5 +1,5 @@ | |||
| 1 | /* | 1 | /* |
| 2 | ** $Id: llimits.h,v 1.21 2000/12/04 18:33:40 roberto Exp roberto $ | 2 | ** $Id: llimits.h,v 1.22 2001/02/09 16:24:44 roberto Exp roberto $ |
| 3 | ** Limits, basic types, and some other "installation-dependent" definitions | 3 | ** Limits, basic types, and some other "installation-dependent" definitions |
| 4 | ** See Copyright Notice in lua.h | 4 | ** See Copyright Notice in lua.h |
| 5 | */ | 5 | */ |
| @@ -40,11 +40,27 @@ | |||
| 40 | 40 | ||
| 41 | 41 | ||
| 42 | 42 | ||
| 43 | typedef unsigned long luint32; /* unsigned int with at least 32 bits */ | 43 | /* |
| 44 | typedef long lint32; /* signed int with at least 32 bits */ | 44 | ** the following types define integer types for values that may not |
| 45 | ** fit in a "small int" (16 bits), but may waste space in a | ||
| 46 | ** "large long" (64 bits). The current definitions should work in | ||
| 47 | ** any machine, but may not be optimal. | ||
| 48 | */ | ||
| 49 | |||
| 50 | /* an unsigned integer to hold hash values */ | ||
| 51 | typedef unsigned int lu_hash; | ||
| 52 | /* its signed equivalent */ | ||
| 53 | typedef int ls_hash; | ||
| 45 | 54 | ||
| 46 | /* an unsigned integer big enough to count the total memory used by Lua */ | 55 | /* an unsigned integer big enough to count the total memory used by Lua */ |
| 47 | typedef unsigned long mem_int; | 56 | typedef unsigned long lu_mem; |
| 57 | |||
| 58 | /* an integer big enough to count the number of strings in use */ | ||
| 59 | typedef long ls_nstr; | ||
| 60 | |||
| 61 | |||
| 62 | /* chars used as small naturals (so that `char' is reserved for characteres) */ | ||
| 63 | typedef unsigned char lu_byte; | ||
| 48 | 64 | ||
| 49 | 65 | ||
| 50 | #define MAX_SIZET ((size_t)(~(size_t)0)-2) | 66 | #define MAX_SIZET ((size_t)(~(size_t)0)-2) |
| @@ -53,10 +69,12 @@ typedef unsigned long mem_int; | |||
| 53 | #define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */ | 69 | #define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */ |
| 54 | 70 | ||
| 55 | /* | 71 | /* |
| 56 | ** conversion of pointer to int (for hashing only) | 72 | ** conversion of pointer to integer |
| 73 | ** this is for hashing only; there is no problem if the integer | ||
| 74 | ** cannot hold the whole pointer value | ||
| 57 | ** (the shift removes bits that are usually 0 because of alignment) | 75 | ** (the shift removes bits that are usually 0 because of alignment) |
| 58 | */ | 76 | */ |
| 59 | #define IntPoint(p) (((luint32)(p)) >> 3) | 77 | #define IntPoint(p) ((((lu_hash)(p)) >> 4) ^ (lu_hash)(p)) |
| 60 | 78 | ||
| 61 | 79 | ||
| 62 | 80 | ||
| @@ -71,7 +89,7 @@ typedef unsigned long mem_int; | |||
| 71 | 89 | ||
| 72 | 90 | ||
| 73 | /* type to ensure maximum alignment */ | 91 | /* type to ensure maximum alignment */ |
| 74 | union L_Umaxalign { double d; char *s; long l; }; | 92 | union L_Umaxalign { double d; void *s; long l; }; |
| 75 | 93 | ||
| 76 | 94 | ||
| 77 | 95 | ||
| @@ -81,7 +99,7 @@ union L_Umaxalign { double d; char *s; long l; }; | |||
| 81 | ** For a very small machine, you may change that to 2 bytes (and adjust | 99 | ** For a very small machine, you may change that to 2 bytes (and adjust |
| 82 | ** the following limits accordingly) | 100 | ** the following limits accordingly) |
| 83 | */ | 101 | */ |
| 84 | typedef luint32 Instruction; | 102 | typedef unsigned long Instruction; |
| 85 | 103 | ||
| 86 | 104 | ||
| 87 | /* | 105 | /* |