1 files changed, 193 insertions, 0 deletions
diff --git a/src/third-party/prqlc-c/prqlc.h b/src/third-party/prqlc-c/prqlc.h
new file mode 100644
index 0000000..aa9fa27
--- /dev/null
+++ b/src/third-party/prqlc-c/prqlc.h
@@ -0,0 +1,193 @@
+/*
+ * PRQL is a modern language for transforming data — a simple, powerful,
+ * pipelined SQL replacement
+ *
+ * License: Apache-2.0
+ * Website: https://prql-lang.org/
+ */
+
+/* This file is autogenerated. Do not modify this file manually. */
+
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#define FFI_SCOPE "PRQL"
+
+/**
+ * Compile message kind. Currently only Error is implemented.
+ */
+typedef enum MessageKind {
+  Error,
+  Warning,
+  Lint,
+} MessageKind;
+
+/**
+ * Identifier of a location in source.
+ * Contains offsets in terms of chars.
+ */
+typedef struct Span {
+  size_t start;
+  size_t end;
+} Span;
+
+/**
+ * Location within a source file.
+ */
+typedef struct SourceLocation {
+  size_t start_line;
+  size_t start_col;
+  size_t end_line;
+  size_t end_col;
+} SourceLocation;
+
+/**
+ * Compile result message.
+ *
+ * Calling code is responsible for freeing all memory allocated
+ * for fields as well as strings.
+ */
+typedef struct Message {
+  /**
+   * Message kind. Currently only Error is implemented.
+   */
+  enum MessageKind kind;
+  /**
+   * Machine-readable identifier of the error
+   */
+  const char *const *code;
+  /**
+   * Plain text of the error
+   */
+  const char *reason;
+  /**
+   * A list of suggestions of how to fix the error
+   */
+  const char *const *hint;
+  /**
+   * Character offset of error origin within a source file
+   */
+  const struct Span *span;
+  /**
+   * Annotated code, containing cause and hints.
+   */
+  const char *const *display;
+  /**
+   * Line and column number of error origin within a source file
+   */
+  const struct SourceLocation *location;
+} Message;
+
+/**
+ * Result of compilation.
+ */
+typedef struct CompileResult {
+  const char *output;
+  const struct Message *messages;
+  size_t messages_len;
+} CompileResult;
+
+/**
+ * Compilation options
+ */
+typedef struct Options {
+  /**
+   * Pass generated SQL string trough a formatter that splits it
+   * into multiple lines and prettifies indentation and spacing.
+   *
+   * Defaults to true.
+   */
+  bool format;
+  /**
+   * Target and dialect to compile to.
+   *
+   * Defaults to `sql.any`, which uses `target` argument from the query header
+   * to determine the SQL dialect.
+   */
+  char *target;
+  /**
+   * Emits the compiler signature as a comment after generated SQL
+   *
+   * Defaults to true.
+   */
+  bool signature_comment;
+} Options;
+
+/**
+ * Compile a PRQL string into a SQL string.
+ *
+ * This is a wrapper for: `prql_to_pl`, `pl_to_rq` and `rq_to_sql` without
+ * converting to JSON between each of the functions.
+ *
+ * See `Options` struct for available compilation options.
+ *
+ * # Safety
+ *
+ * This function assumes zero-terminated input strings.
+ * Calling code is responsible for freeing memory allocated for `CompileResult`
+ * by calling `result_destroy`.
+ */
+struct CompileResult compile(const char *prql_query,
+                             const struct Options *options);
+
+/**
+ * Build PL AST from a PRQL string. PL in documented in the
+ * [prqlc Rust crate](https://docs.rs/prqlc/latest/prqlc/ir/pl).
+ *
+ * Takes PRQL source buffer and writes PL serialized as JSON to `out` buffer.
+ *
+ * Returns 0 on success and a negative number -1 on failure.
+ *
+ * # Safety
+ *
+ * This function assumes zero-terminated input strings.
+ * Calling code is responsible for freeing memory allocated for `CompileResult`
+ * by calling `result_destroy`.
+ */
+struct CompileResult prql_to_pl(const char *prql_query);
+
+/**
+ * Finds variable references, validates functions calls, determines frames and
+ * converts PL to RQ. PL and RQ are documented in the [prqlc Rust
+ * crate](https://docs.rs/prqlc/latest/prqlc/ast).
+ *
+ * Takes PL serialized as JSON buffer and writes RQ serialized as JSON to `out`
+ * buffer.
+ *
+ * Returns 0 on success and a negative number -1 on failure.
+ *
+ * # Safety
+ *
+ * This function assumes zero-terminated input strings.
+ * Calling code is responsible for freeing memory allocated for `CompileResult`
+ * by calling `result_destroy`.
+ */
+struct CompileResult pl_to_rq(const char *pl_json);
+
+/**
+ * Convert RQ AST into an SQL string. RQ is documented in the
+ * [prqlc Rust crate](https://docs.rs/prqlc/latest/prqlc/ir/rq).
+ *
+ * Takes RQ serialized as JSON buffer and writes SQL source to `out` buffer.
+ *
+ * Returns 0 on success and a negative number -1 on failure.
+ *
+ * # Safety
+ *
+ * This function assumes zero-terminated input strings.
+ * Calling code is responsible for freeing memory allocated for `CompileResult`
+ * by calling `result_destroy`.
+ */
+struct CompileResult rq_to_sql(const char *rq_json,
+                               const struct Options *options);
+
+/**
+ * Destroy a `CompileResult` once you are done with it.
+ *
+ * # Safety
+ *
+ * This function expects to be called exactly once after the call of any the
+ * functions that return `CompileResult`. No fields should be freed manually.
+ */
+void result_destroy(struct CompileResult res);