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eval/encode: Move main macros from encode.c to typval_encode.h
This commit is contained in:
ZyX
555
src/nvim/eval/typval_encode.h
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555
src/nvim/eval/typval_encode.h
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@@ -0,0 +1,555 @@
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/// @file eval/typval_convert.h
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///
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/// Contains set of macros used to convert (possibly recursive) typval_T into
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/// something else. For these macros to work the following macros must be
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/// defined:
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/// @def TYPVAL_ENCODE_CONV_NIL
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/// @brief Macros used to convert NIL value
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///
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/// Is called both for special dictionary (unless #TYPVAL_ENCODE_ALLOW_SPECIALS
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/// is false) and `v:null`. Accepts no arguments, but still must be
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/// a function-like macros.
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/// @def TYPVAL_ENCODE_CONV_BOOL
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/// @brief Macros used to convert boolean value
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///
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/// Is called both for special dictionary (unless #TYPVAL_ENCODE_ALLOW_SPECIALS
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/// is false) and `v:true`/`v:false`.
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///
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/// @param num Boolean value to convert. Value is an expression which
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/// evaluates to some integer.
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/// @def TYPVAL_ENCODE_CONV_NUMBER
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/// @brief Macros used to convert integer
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///
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/// @param num Integer to convert, must accept both varnumber_T and int64_t.
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/// @def TYPVAL_ENCODE_CONV_UNSIGNED_NUMBER
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/// @brief Macros used to convert unsigned integer
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///
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/// Not used if #TYPVAL_ENCODE_ALLOW_SPECIALS is false, but still must be
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/// defined.
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///
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/// @param num Integer to convert, must accept uint64_t.
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/// @def TYPVAL_ENCODE_CONV_FLOAT
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/// @brief Macros used to convert floating-point number
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///
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/// @param flt Number to convert, must accept float_T.
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/// @def TYPVAL_ENCODE_CONV_STRING
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/// @brief Macros used to convert plain string
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///
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/// Is used to convert VAR_STRING objects as well as BIN strings represented as
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/// special dictionary.
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///
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/// @param buf String to convert. Is a char[] buffer, not NUL-terminated.
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/// @param len String length.
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/// @def TYPVAL_ENCODE_CONV_STR_STRING
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/// @brief Like #TYPVAL_ENCODE_CONV_STRING, but for STR strings
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///
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/// Is used to convert dictionary keys and STR strings represented as special
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/// dictionaries.
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/// @def TYPVAL_ENCODE_CONV_EXT_STRING
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/// @brief Macros used to convert EXT string
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///
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/// Is used to convert EXT strings represented as special dictionaries. Never
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/// actually used if #TYPVAL_ENCODE_ALLOW_SPECIALS is false, but still must be
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/// defined.
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///
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/// @param buf String to convert. Is a char[] buffer, not NUL-terminated.
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/// @param len String length.
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/// @param type EXT type.
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/// @def TYPVAL_ENCODE_CONV_FUNC
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/// @brief Macros used to convert a function reference
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///
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/// @param fun Function name.
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/// @def TYPVAL_ENCODE_CONV_EMPTY_LIST
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/// @brief Macros used to convert an empty list
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///
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/// Accepts no arguments, but still must be a function-like macros.
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/// @def TYPVAL_ENCODE_CONV_EMPTY_DICT
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/// @brief Macros used to convert an empty dictionary
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///
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/// Accepts no arguments, but still must be a function-like macros.
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/// @def TYPVAL_ENCODE_CONV_LIST_START
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/// @brief Macros used before starting to convert non-empty list
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///
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/// @param len List length. Is an expression which evaluates to an integer.
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/// @def TYPVAL_ENCODE_CONV_LIST_BETWEEN_ITEMS
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/// @brief Macros used after finishing converting non-last list item
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///
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/// Accepts no arguments, but still must be a function-like macros.
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/// @def TYPVAL_ENCODE_CONV_LIST_END
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/// @brief Macros used after converting non-empty list
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///
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/// Accepts no arguments, but still must be a function-like macros.
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/// @def TYPVAL_ENCODE_CONV_DICT_START
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/// @brief Macros used before starting to convert non-empty dictionary
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///
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/// @param len Dictionary length. Is an expression which evaluates to an
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/// integer.
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/// @def TYPVAL_ENCODE_CONV_SPECIAL_DICT_KEY_CHECK
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/// @brief Macros used to check special dictionary key
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///
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/// @param label Label for goto in case check was not successfull.
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/// @param kv_pair List with two elements: key and value.
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/// @def TYPVAL_ENCODE_CONV_DICT_AFTER_KEY
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/// @brief Macros used after finishing converting dictionary key
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///
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/// Accepts no arguments, but still must be a function-like macros.
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/// @def TYPVAL_ENCODE_CONV_DICT_BETWEEN_ITEMS
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/// @brief Macros used after finishing converting non-last dictionary value
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///
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/// Accepts no arguments, but still must be a function-like macros.
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/// @def TYPVAL_ENCODE_CONV_DICT_END
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/// @brief Macros used after converting non-empty dictionary
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///
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/// Accepts no arguments, but still must be a function-like macros.
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/// @def TYPVAL_ENCODE_CONV_RECURSE
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/// @brief Macros used when self-containing container is detected
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///
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/// @param val Container for which this situation was detected.
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/// @param conv_type Type of the stack entry, @see MPConvStackValType.
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/// @def TYPVAL_ENCODE_ALLOW_SPECIALS
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/// @brief Macros that specifies whether special dictionaries are special
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///
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/// Must be something that evaluates to boolean, most likely `true` or `false`.
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/// If it is false then special dictionaries are not treated specially.
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#ifndef NVIM_EVAL_TYPVAL_ENCODE_H
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#define NVIM_EVAL_TYPVAL_ENCODE_H
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#include <stddef.h>
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#include <inttypes.h>
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#include <assert.h>
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#include "nvim/lib/kvec.h"
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#include "nvim/eval_defs.h"
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#include "nvim/eval/encode.h"
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#include "nvim/func_attr.h"
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/// Type of the stack entry
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typedef enum {
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kMPConvDict, ///< Convert dict_T *dictionary.
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kMPConvList, ///< Convert list_T *list.
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kMPConvPairs, ///< Convert mapping represented as a list_T* of pairs.
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} MPConvStackValType;
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/// Structure representing current VimL to messagepack conversion state
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typedef struct {
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MPConvStackValType type; ///< Type of the stack entry.
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union {
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struct {
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dict_T *dict; ///< Currently converted dictionary.
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hashitem_T *hi; ///< Currently converted dictionary item.
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size_t todo; ///< Amount of items left to process.
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} d; ///< State of dictionary conversion.
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struct {
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list_T *list; ///< Currently converted list.
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listitem_T *li; ///< Currently converted list item.
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} l; ///< State of list or generic mapping conversion.
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} data; ///< Data to convert.
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} MPConvStackVal;
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/// Stack used to convert VimL values to messagepack.
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typedef kvec_t(MPConvStackVal) MPConvStack;
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/// Code for checking whether container references itself
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///
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/// @param[in,out] val Container to check.
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/// @param copyID_attr Name of the container attribute that holds copyID.
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/// After checking whether value of this attribute is
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/// copyID (variable) it is set to copyID.
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#define _TYPVAL_ENCODE_CHECK_SELF_REFERENCE(val, copyID_attr, conv_type) \
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do { \
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if ((val)->copyID_attr == copyID) { \
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TYPVAL_ENCODE_CONV_RECURSE((val), conv_type); \
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} \
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(val)->copyID_attr = copyID; \
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} while (0)
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/// Length of the string stored in typval_T
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///
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/// @param[in] tv String for which to compute length for. Must be typval_T
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/// with VAR_STRING.
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///
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/// @return Length of the string stored in typval_T, including 0 for NULL
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/// string.
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static inline size_t tv_strlen(const typval_T *const tv)
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FUNC_ATTR_ALWAYS_INLINE FUNC_ATTR_PURE FUNC_ATTR_WARN_UNUSED_RESULT
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FUNC_ATTR_NONNULL_ALL
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{
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assert(tv->v_type == VAR_STRING);
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return (tv->vval.v_string == NULL
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? 0
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: strlen((char *) tv->vval.v_string));
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}
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/// Define functions which convert VimL value to something else
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///
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/// Creates function `vim_to_{name}(firstargtype firstargname, typval_T *const
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/// tv)` which returns OK or FAIL and helper functions.
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///
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/// @param scope Scope of the main function: either nothing or `static`.
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/// @param firstargtype Type of the first argument. It will be used to return
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/// the results.
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/// @param firstargname Name of the first argument.
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/// @param name Name of the target converter.
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#define TYPVAL_ENCODE_DEFINE_CONV_FUNCTIONS(scope, name, firstargtype, \
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firstargname) \
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static int name##_convert_one_value(firstargtype firstargname, \
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MPConvStack *const mpstack, \
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typval_T *const tv, \
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const int copyID, \
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const char *const objname) \
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FUNC_ATTR_NONNULL_ALL FUNC_ATTR_WARN_UNUSED_RESULT \
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{ \
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switch (tv->v_type) { \
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case VAR_STRING: { \
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TYPVAL_ENCODE_CONV_STRING(tv->vval.v_string, tv_strlen(tv)); \
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break; \
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} \
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case VAR_NUMBER: { \
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TYPVAL_ENCODE_CONV_NUMBER(tv->vval.v_number); \
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break; \
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} \
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case VAR_FLOAT: { \
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TYPVAL_ENCODE_CONV_FLOAT(tv->vval.v_float); \
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break; \
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} \
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case VAR_FUNC: { \
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TYPVAL_ENCODE_CONV_FUNC(tv->vval.v_string); \
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break; \
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} \
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case VAR_LIST: { \
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if (tv->vval.v_list == NULL || tv->vval.v_list->lv_len == 0) { \
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TYPVAL_ENCODE_CONV_EMPTY_LIST(); \
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break; \
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} \
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_TYPVAL_ENCODE_CHECK_SELF_REFERENCE(tv->vval.v_list, lv_copyID, \
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kMPConvList); \
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TYPVAL_ENCODE_CONV_LIST_START(tv->vval.v_list->lv_len); \
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kv_push(*mpstack, ((MPConvStackVal) { \
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.type = kMPConvList, \
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.data = { \
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.l = { \
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.list = tv->vval.v_list, \
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.li = tv->vval.v_list->lv_first, \
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}, \
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}, \
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})); \
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break; \
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} \
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case VAR_SPECIAL: { \
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switch (tv->vval.v_special) { \
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case kSpecialVarNull: { \
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TYPVAL_ENCODE_CONV_NIL(); \
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break; \
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} \
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case kSpecialVarTrue: \
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case kSpecialVarFalse: { \
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TYPVAL_ENCODE_CONV_BOOL(tv->vval.v_special == kSpecialVarTrue); \
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break; \
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} \
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} \
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break; \
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} \
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case VAR_DICT: { \
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if (tv->vval.v_dict == NULL \
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|| tv->vval.v_dict->dv_hashtab.ht_used == 0) { \
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TYPVAL_ENCODE_CONV_EMPTY_DICT(); \
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break; \
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} \
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const dictitem_T *type_di; \
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const dictitem_T *val_di; \
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if (TYPVAL_ENCODE_ALLOW_SPECIALS \
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&& tv->vval.v_dict->dv_hashtab.ht_used == 2 \
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&& (type_di = dict_find((dict_T *) tv->vval.v_dict, \
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(char_u *) "_TYPE", -1)) != NULL \
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&& type_di->di_tv.v_type == VAR_LIST \
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&& (val_di = dict_find((dict_T *) tv->vval.v_dict, \
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(char_u *) "_VAL", -1)) != NULL) { \
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size_t i; \
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for (i = 0; i < ARRAY_SIZE(eval_msgpack_type_lists); i++) { \
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if (type_di->di_tv.vval.v_list == eval_msgpack_type_lists[i]) { \
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break; \
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} \
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} \
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if (i == ARRAY_SIZE(eval_msgpack_type_lists)) { \
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goto name##_convert_one_value_regular_dict; \
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} \
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switch ((MessagePackType) i) { \
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case kMPNil: { \
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TYPVAL_ENCODE_CONV_NIL(); \
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break; \
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} \
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case kMPBoolean: { \
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if (val_di->di_tv.v_type != VAR_NUMBER) { \
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goto name##_convert_one_value_regular_dict; \
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} \
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TYPVAL_ENCODE_CONV_BOOL(val_di->di_tv.vval.v_number); \
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break; \
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} \
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case kMPInteger: { \
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const list_T *val_list; \
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varnumber_T sign; \
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varnumber_T highest_bits; \
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varnumber_T high_bits; \
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varnumber_T low_bits; \
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/* List of 4 integers; first is signed (should be 1 or -1, but */ \
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/* this is not checked), second is unsigned and have at most */ \
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/* one (sign is -1) or two (sign is 1) non-zero bits (number of */ \
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/* bits is not checked), other unsigned and have at most 31 */ \
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/* non-zero bits (number of bits is not checked).*/ \
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if (val_di->di_tv.v_type != VAR_LIST \
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|| (val_list = val_di->di_tv.vval.v_list) == NULL \
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|| val_list->lv_len != 4 \
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|| val_list->lv_first->li_tv.v_type != VAR_NUMBER \
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|| (sign = val_list->lv_first->li_tv.vval.v_number) == 0 \
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|| val_list->lv_first->li_next->li_tv.v_type != VAR_NUMBER \
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|| (highest_bits = \
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val_list->lv_first->li_next->li_tv.vval.v_number) < 0 \
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|| val_list->lv_last->li_prev->li_tv.v_type != VAR_NUMBER \
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|| (high_bits = \
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val_list->lv_last->li_prev->li_tv.vval.v_number) < 0 \
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|| val_list->lv_last->li_tv.v_type != VAR_NUMBER \
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|| (low_bits = val_list->lv_last->li_tv.vval.v_number) < 0) { \
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goto name##_convert_one_value_regular_dict; \
|
||||
} \
|
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uint64_t number = ((uint64_t) (((uint64_t) highest_bits) << 62) \
|
||||
| (uint64_t) (((uint64_t) high_bits) << 31) \
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| (uint64_t) low_bits); \
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if (sign > 0) { \
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TYPVAL_ENCODE_CONV_UNSIGNED_NUMBER(number); \
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} else { \
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TYPVAL_ENCODE_CONV_NUMBER(-number); \
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} \
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break; \
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} \
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case kMPFloat: { \
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if (val_di->di_tv.v_type != VAR_FLOAT) { \
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goto name##_convert_one_value_regular_dict; \
|
||||
} \
|
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TYPVAL_ENCODE_CONV_FLOAT(val_di->di_tv.vval.v_float); \
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break; \
|
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} \
|
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case kMPString: \
|
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case kMPBinary: { \
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const bool is_string = ((MessagePackType) i == kMPString); \
|
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if (val_di->di_tv.v_type != VAR_LIST) { \
|
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goto name##_convert_one_value_regular_dict; \
|
||||
} \
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size_t len; \
|
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char *buf; \
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if (!encode_vim_list_to_buf(val_di->di_tv.vval.v_list, &len, \
|
||||
&buf)) { \
|
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goto name##_convert_one_value_regular_dict; \
|
||||
} \
|
||||
if (is_string) { \
|
||||
TYPVAL_ENCODE_CONV_STR_STRING(buf, len); \
|
||||
} else { \
|
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TYPVAL_ENCODE_CONV_STRING(buf, len); \
|
||||
} \
|
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xfree(buf); \
|
||||
break; \
|
||||
} \
|
||||
case kMPArray: { \
|
||||
if (val_di->di_tv.v_type != VAR_LIST) { \
|
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goto name##_convert_one_value_regular_dict; \
|
||||
} \
|
||||
_TYPVAL_ENCODE_CHECK_SELF_REFERENCE(val_di->di_tv.vval.v_list, \
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lv_copyID, kMPConvList); \
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TYPVAL_ENCODE_CONV_LIST_START(val_di->di_tv.vval.v_list->lv_len); \
|
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kv_push(*mpstack, ((MPConvStackVal) { \
|
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.type = kMPConvList, \
|
||||
.data = { \
|
||||
.l = { \
|
||||
.list = val_di->di_tv.vval.v_list, \
|
||||
.li = val_di->di_tv.vval.v_list->lv_first, \
|
||||
}, \
|
||||
}, \
|
||||
})); \
|
||||
break; \
|
||||
} \
|
||||
case kMPMap: { \
|
||||
if (val_di->di_tv.v_type != VAR_LIST) { \
|
||||
goto name##_convert_one_value_regular_dict; \
|
||||
} \
|
||||
list_T *const val_list = val_di->di_tv.vval.v_list; \
|
||||
if (val_list == NULL || val_list->lv_len == 0) { \
|
||||
TYPVAL_ENCODE_CONV_EMPTY_DICT(); \
|
||||
break; \
|
||||
} \
|
||||
for (const listitem_T *li = val_list->lv_first; li != NULL; \
|
||||
li = li->li_next) { \
|
||||
if (li->li_tv.v_type != VAR_LIST \
|
||||
|| li->li_tv.vval.v_list->lv_len != 2) { \
|
||||
goto name##_convert_one_value_regular_dict; \
|
||||
} \
|
||||
} \
|
||||
_TYPVAL_ENCODE_CHECK_SELF_REFERENCE(val_list, lv_copyID, \
|
||||
kMPConvPairs); \
|
||||
TYPVAL_ENCODE_CONV_DICT_START(val_list->lv_len); \
|
||||
kv_push(*mpstack, ((MPConvStackVal) { \
|
||||
.type = kMPConvPairs, \
|
||||
.data = { \
|
||||
.l = { \
|
||||
.list = val_list, \
|
||||
.li = val_list->lv_first, \
|
||||
}, \
|
||||
}, \
|
||||
})); \
|
||||
break; \
|
||||
} \
|
||||
case kMPExt: { \
|
||||
const list_T *val_list; \
|
||||
varnumber_T type; \
|
||||
if (val_di->di_tv.v_type != VAR_LIST \
|
||||
|| (val_list = val_di->di_tv.vval.v_list) == NULL \
|
||||
|| val_list->lv_len != 2 \
|
||||
|| (val_list->lv_first->li_tv.v_type != VAR_NUMBER) \
|
||||
|| (type = val_list->lv_first->li_tv.vval.v_number) > INT8_MAX \
|
||||
|| type < INT8_MIN \
|
||||
|| (val_list->lv_last->li_tv.v_type != VAR_LIST)) { \
|
||||
goto name##_convert_one_value_regular_dict; \
|
||||
} \
|
||||
size_t len; \
|
||||
char *buf; \
|
||||
if (!encode_vim_list_to_buf(val_list->lv_last->li_tv.vval.v_list, \
|
||||
&len, &buf)) { \
|
||||
goto name##_convert_one_value_regular_dict; \
|
||||
} \
|
||||
TYPVAL_ENCODE_CONV_EXT_STRING(buf, len, type); \
|
||||
xfree(buf); \
|
||||
break; \
|
||||
} \
|
||||
} \
|
||||
break; \
|
||||
} \
|
||||
name##_convert_one_value_regular_dict: \
|
||||
_TYPVAL_ENCODE_CHECK_SELF_REFERENCE(tv->vval.v_dict, dv_copyID, \
|
||||
kMPConvDict); \
|
||||
TYPVAL_ENCODE_CONV_DICT_START(tv->vval.v_dict->dv_hashtab.ht_used); \
|
||||
kv_push(*mpstack, ((MPConvStackVal) { \
|
||||
.type = kMPConvDict, \
|
||||
.data = { \
|
||||
.d = { \
|
||||
.dict = tv->vval.v_dict, \
|
||||
.hi = tv->vval.v_dict->dv_hashtab.ht_array, \
|
||||
.todo = tv->vval.v_dict->dv_hashtab.ht_used, \
|
||||
}, \
|
||||
}, \
|
||||
})); \
|
||||
break; \
|
||||
} \
|
||||
case VAR_UNKNOWN: { \
|
||||
EMSG2(_(e_intern2), #name "_convert_one_value()"); \
|
||||
return FAIL; \
|
||||
} \
|
||||
} \
|
||||
return OK; \
|
||||
} \
|
||||
\
|
||||
scope int encode_vim_to_##name(firstargtype firstargname, typval_T *const tv, \
|
||||
const char *const objname) \
|
||||
FUNC_ATTR_WARN_UNUSED_RESULT \
|
||||
{ \
|
||||
const int copyID = get_copyID(); \
|
||||
MPConvStack mpstack; \
|
||||
kv_init(mpstack); \
|
||||
if (name##_convert_one_value(firstargname, &mpstack, tv, copyID, objname) \
|
||||
== FAIL) { \
|
||||
goto encode_vim_to_##name##_error_ret; \
|
||||
} \
|
||||
while (kv_size(mpstack)) { \
|
||||
MPConvStackVal *cur_mpsv = &kv_A(mpstack, kv_size(mpstack) - 1); \
|
||||
typval_T *cur_tv = NULL; \
|
||||
switch (cur_mpsv->type) { \
|
||||
case kMPConvDict: { \
|
||||
if (!cur_mpsv->data.d.todo) { \
|
||||
(void) kv_pop(mpstack); \
|
||||
cur_mpsv->data.d.dict->dv_copyID = copyID - 1; \
|
||||
TYPVAL_ENCODE_CONV_DICT_END(); \
|
||||
continue; \
|
||||
} else if (cur_mpsv->data.d.todo \
|
||||
!= cur_mpsv->data.d.dict->dv_hashtab.ht_used) { \
|
||||
TYPVAL_ENCODE_CONV_DICT_BETWEEN_ITEMS(); \
|
||||
} \
|
||||
while (HASHITEM_EMPTY(cur_mpsv->data.d.hi)) { \
|
||||
cur_mpsv->data.d.hi++; \
|
||||
} \
|
||||
dictitem_T *const di = HI2DI(cur_mpsv->data.d.hi); \
|
||||
cur_mpsv->data.d.todo--; \
|
||||
cur_mpsv->data.d.hi++; \
|
||||
TYPVAL_ENCODE_CONV_STR_STRING(&di->di_key[0], \
|
||||
strlen((char *) &di->di_key[0])); \
|
||||
TYPVAL_ENCODE_CONV_DICT_AFTER_KEY(); \
|
||||
cur_tv = &di->di_tv; \
|
||||
break; \
|
||||
} \
|
||||
case kMPConvList: { \
|
||||
if (cur_mpsv->data.l.li == NULL) { \
|
||||
(void) kv_pop(mpstack); \
|
||||
cur_mpsv->data.l.list->lv_copyID = copyID - 1; \
|
||||
TYPVAL_ENCODE_CONV_LIST_END(); \
|
||||
continue; \
|
||||
} else if (cur_mpsv->data.l.li != cur_mpsv->data.l.list->lv_first) { \
|
||||
TYPVAL_ENCODE_CONV_LIST_BETWEEN_ITEMS(); \
|
||||
} \
|
||||
cur_tv = &cur_mpsv->data.l.li->li_tv; \
|
||||
cur_mpsv->data.l.li = cur_mpsv->data.l.li->li_next; \
|
||||
break; \
|
||||
} \
|
||||
case kMPConvPairs: { \
|
||||
if (cur_mpsv->data.l.li == NULL) { \
|
||||
(void) kv_pop(mpstack); \
|
||||
cur_mpsv->data.l.list->lv_copyID = copyID - 1; \
|
||||
TYPVAL_ENCODE_CONV_DICT_END(); \
|
||||
continue; \
|
||||
} else if (cur_mpsv->data.l.li != cur_mpsv->data.l.list->lv_first) { \
|
||||
TYPVAL_ENCODE_CONV_DICT_BETWEEN_ITEMS(); \
|
||||
} \
|
||||
const list_T *const kv_pair = cur_mpsv->data.l.li->li_tv.vval.v_list; \
|
||||
TYPVAL_ENCODE_CONV_SPECIAL_DICT_KEY_CHECK( \
|
||||
encode_vim_to_##name##_error_ret, kv_pair); \
|
||||
if (name##_convert_one_value(firstargname, &mpstack, \
|
||||
&kv_pair->lv_first->li_tv, copyID, \
|
||||
objname) == FAIL) { \
|
||||
goto encode_vim_to_##name##_error_ret; \
|
||||
} \
|
||||
TYPVAL_ENCODE_CONV_DICT_AFTER_KEY(); \
|
||||
cur_tv = &kv_pair->lv_last->li_tv; \
|
||||
cur_mpsv->data.l.li = cur_mpsv->data.l.li->li_next; \
|
||||
break; \
|
||||
} \
|
||||
} \
|
||||
assert(cur_tv != NULL); \
|
||||
if (name##_convert_one_value(firstargname, &mpstack, cur_tv, copyID, \
|
||||
objname) == FAIL) { \
|
||||
goto encode_vim_to_##name##_error_ret; \
|
||||
} \
|
||||
} \
|
||||
kv_destroy(mpstack); \
|
||||
return OK; \
|
||||
encode_vim_to_##name##_error_ret: \
|
||||
kv_destroy(mpstack); \
|
||||
return FAIL; \
|
||||
}
|
||||
|
||||
#endif // NVIM_EVAL_TYPVAL_ENCODE_H
|
||||
Reference in New Issue
Block a user