Lichen

templates/types.h

288:fff09c70f489
2016-11-30 Paul Boddie Implemented the dictionary items method and expanded IndexError. Expanded the dictionary test program.
     1 /* Runtime types. */     2      3 #ifndef __TYPES_H__     4 #define __TYPES_H__     5      6 /* Attribute tables are lists of codes confirming the presence of attributes. */     7      8 typedef struct __table     9 {    10     const unsigned int size, attrs[];    11 } __table;    12     13 /* Parameter tables are lists of codes confirming the presence of parameters, as    14    well as the positions of those parameters in the list for a given function.    15 */    16     17 typedef struct __param    18 {    19     unsigned short code, pos;    20 } __param;    21     22 typedef struct __ptable    23 {    24     const unsigned int size;    25     const __param params[];    26 } __ptable;    27     28 /* Attributes are context and value pairs.    29    Objects are collections of attributes.    30    Object references are references to tables and collections of attributes.    31    Attribute references are references to single attributes. */    32     33 typedef struct __obj __obj;    34 typedef struct __fragment __fragment;    35 typedef struct __mapping __mapping;    36     37 typedef struct __attr    38 {    39     /* One of... */    40     union    41     {    42         __obj * context;        /* attribute context */    43         unsigned int min;       /* minimum number of parameters */    44         __obj * b;              /* bound callable object */    45     };    46     47     /* One of... */    48     union    49     {    50         __obj * value;          /* attribute value */    51         const __ptable * ptable;/* parameter table */    52         struct __attr (*fn)();  /* callable details */    53     54         int intvalue;           /* integer value */    55         double floatvalue;      /* floating point value */    56         char * strvalue;        /* string value */    57         __fragment * seqvalue;  /* sequence data */    58         __mapping * mapvalue;   /* mapping data */    59     };    60 } __attr;    61     62 typedef struct __obj    63 {    64     const __table * table;      /* attribute table */    65     unsigned int pos;           /* position of attribute indicating class */    66     __attr attrs[];             /* attributes */    67 } __obj;    68     69 typedef __obj * __ref;    70     71 /* Fragments are simple collections of attributes employed by sequence types.    72    They provide the basis of lists and tuples. */    73     74 typedef struct __fragment    75 {    76     unsigned int size, capacity;    77     __attr attrs[];    78 } __fragment;    79     80 #define __FRAGMENT_SIZE(NUMBER) (NUMBER * sizeof(__attr) + 2 * sizeof(unsigned int))    81     82 /* Mappings are simple collections of fragment references used to hold the    83    "buckets" used in hash tables. Here, separate lists of keys and values hold    84    attributes referring to the actual keys and corresponding values. */    85     86 #define __MAPPING_BUCKETS 10    87     88 typedef struct __mapping    89 {    90     __fragment *keys[__MAPPING_BUCKETS];    91     __fragment *values[__MAPPING_BUCKETS];    92 } __mapping;    93     94 #define __MAPPING_SIZE(NUMBER) (2 * NUMBER * sizeof(__fragment *) + sizeof(unsigned int))    95     96 /* Special instance position value. The pos member of __obj refers to the    97    special type attribute for classes, indicating which position holds the    98    attribute describing the class type. For instances, it is set to zero. */    99    100 #define __INSTANCEPOS 0   101    102 /* Special null value. */   103    104 #define __NULL ((__attr) {0, 0})   105    106 /* Function pointer type. */   107    108 typedef __attr (*__func)();   109    110 /* Convenience macros. */   111    112 #define __ARGS(...) ((__attr[]) {__VA_ARGS__})   113 #define __KWARGS(...) ((__param[]) {__VA_ARGS__})   114    115 #endif /* __TYPES_H__ */