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159 lines
4.6 KiB
C++
159 lines
4.6 KiB
C++
/*
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* PRQL is a modern language for transforming data — a simple, powerful,
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* pipelined SQL replacement
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*
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* License: Apache-2.0
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* Website: https://prql-lang.org/
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*/
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/* This file is autogenerated. Do not modify this file manually. */
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#include <cstdarg>
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#include <cstdint>
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#include <cstdlib>
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#include <new>
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#include <ostream>
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#define FFI_SCOPE "PRQL"
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namespace prqlc {
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/// Compile message kind. Currently only Error is implemented.
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enum class MessageKind {
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Error,
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Warning,
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Lint,
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};
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/// Identifier of a location in source.
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/// Contains offsets in terms of chars.
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struct Span {
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size_t start;
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size_t end;
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};
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/// Location within a source file.
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struct SourceLocation {
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size_t start_line;
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size_t start_col;
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size_t end_line;
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size_t end_col;
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};
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/// Compile result message.
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///
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/// Calling code is responsible for freeing all memory allocated
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/// for fields as well as strings.
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struct Message {
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/// Message kind. Currently only Error is implemented.
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MessageKind kind;
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/// Machine-readable identifier of the error
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const char* const* code;
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/// Plain text of the error
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const char* reason;
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/// A list of suggestions of how to fix the error
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const char* const* hint;
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/// Character offset of error origin within a source file
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const Span* span;
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/// Annotated code, containing cause and hints.
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const char* const* display;
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/// Line and column number of error origin within a source file
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const SourceLocation* location;
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};
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/// Result of compilation.
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struct CompileResult {
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const char* output;
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const Message* messages;
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size_t messages_len;
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};
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/// Compilation options
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struct Options {
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/// Pass generated SQL string trough a formatter that splits it
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/// into multiple lines and prettifies indentation and spacing.
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///
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/// Defaults to true.
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bool format;
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/// Target and dialect to compile to.
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///
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/// Defaults to `sql.any`, which uses `target` argument from the query
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/// header to determine the SQL dialect.
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const char* target;
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/// Emits the compiler signature as a comment after generated SQL
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///
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/// Defaults to true.
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bool signature_comment;
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};
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extern "C"
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{
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/// Compile a PRQL string into a SQL string.
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///
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/// This is a wrapper for: `prql_to_pl`, `pl_to_rq` and `rq_to_sql` without
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/// converting to JSON between each of the functions.
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///
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/// See `Options` struct for available compilation options.
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///
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/// # Safety
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///
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/// This function assumes zero-terminated input strings.
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/// Calling code is responsible for freeing memory allocated for `CompileResult`
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/// by calling `result_destroy`.
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CompileResult compile(const char* prql_query, const Options* options);
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/// Build PL AST from a PRQL string. PL in documented in the
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/// [prqlc Rust crate](https://docs.rs/prqlc/latest/prqlc/ir/pl).
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///
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/// Takes PRQL source buffer and writes PL serialized as JSON to `out` buffer.
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///
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/// Returns 0 on success and a negative number -1 on failure.
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///
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/// # Safety
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///
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/// This function assumes zero-terminated input strings.
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/// Calling code is responsible for freeing memory allocated for `CompileResult`
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/// by calling `result_destroy`.
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CompileResult prql_to_pl(const char* prql_query);
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/// Finds variable references, validates functions calls, determines frames and
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/// converts PL to RQ. PL and RQ are documented in the [prqlc Rust
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/// crate](https://docs.rs/prqlc/latest/prqlc/ast).
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///
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/// Takes PL serialized as JSON buffer and writes RQ serialized as JSON to `out`
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/// buffer.
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///
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/// Returns 0 on success and a negative number -1 on failure.
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///
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/// # Safety
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///
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/// This function assumes zero-terminated input strings.
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/// Calling code is responsible for freeing memory allocated for `CompileResult`
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/// by calling `result_destroy`.
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CompileResult pl_to_rq(const char* pl_json);
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/// Convert RQ AST into an SQL string. RQ is documented in the
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/// [prqlc Rust crate](https://docs.rs/prqlc/latest/prqlc/ir/rq).
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///
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/// Takes RQ serialized as JSON buffer and writes SQL source to `out` buffer.
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///
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/// Returns 0 on success and a negative number -1 on failure.
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///
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/// # Safety
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///
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/// This function assumes zero-terminated input strings.
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/// Calling code is responsible for freeing memory allocated for `CompileResult`
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/// by calling `result_destroy`.
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CompileResult rq_to_sql(const char* rq_json, const Options* options);
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/// Destroy a `CompileResult` once you are done with it.
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///
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/// # Safety
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///
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/// This function expects to be called exactly once after the call of any the
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/// functions that return `CompileResult`. No fields should be freed manually.
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void result_destroy(CompileResult res);
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} // extern "C"
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} // namespace prqlc
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