Initial CST-Agent: portable Linux/Termux/Windows coding agent.

Vendored sashidown, OpenAI-compatible env (OPENAI_*), and bootstrap scripts. Co-authored-by: Cursor <cursoragent@cursor.com>
2026-09-07 22:42:32 +08:00
commit 1f1fcba7ad
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+#ifndef MD_RENDER_H
+#define MD_RENDER_H
+
+#include "sashidown.h"
+#include <stddef.h>
+#include <stdint.h>
+
+typedef enum {
+    LK_EMPTY,
+    LK_FENCE,
+    LK_HEADING,
+    LK_HR,
+    LK_BQ,
+    LK_UL,
+    LK_OL,
+    LK_LATEX_LINE,
+    LK_LATEX_BLOCK,
+    LK_PARA,
+} line_kind_t;
+
+typedef struct {
+    line_kind_t kind;
+    size_t      content_start;
+    size_t      content_end;
+    int         heading_level;
+    int         fence_len;
+    char        fence_char;   /* '`' or '~' */
+    size_t      info_start;   /* fence info string */
+    size_t      info_end;
+    int         task;         /* 0=none, 1=unchecked, 2=checked */
+} line_info_t;
+
+/*
+ * [CST State Q] — open-block environment registers (finite CST state).
+ * Tracks which block containers are currently open so the transducer can
+ * emit close tags without an AST. Constant size; independent of |B|.
+ */
+typedef struct {
+    uint8_t ul;
+    uint8_t ol;
+    uint8_t bq;
+    uint8_t para;
+} block_env_t;
+
+/*
+ * [CST State Q] — full confirmation-state transducer state.
+ * Holds block_env plus soft-window / delayed-commit registers (fence,
+ * LaTeX, pending line, table gate). Maps to CST state Q in the paper:
+ * Scan(B[0..stop)) advances Q and emits only confirmed Y.
+ */
+typedef struct {
+    block_env_t block; /* [CST State Q] nested open-block bits */
+    int         pending_valid;
+    size_t      pending_pos;
+    size_t      pending_le;
+    line_info_t pending_li;
+    int         in_fence;
+    int         fence_len;
+    char        fence_char;
+    size_t      fence_info_start;
+    size_t      fence_info_end;
+    int         in_latex_block;
+    size_t      latex_start;
+    uint8_t     para_hard_break;
+    /* Streaming table (scheme C): after header+sep committed, body rows
+     * emit immediately; close on empty / non-pipe / final. */
+    int         in_table;
+    int         table_cols;
+    /* Inline emphasis/code spans an open <p> across soft line breaks. */
+    uint8_t     inline_bold;
+    uint8_t     inline_italic;
+    uint8_t     inline_code;
+    uint8_t     inline_latex;
+    uint8_t     inline_strike;
+} sashidown_render_state_t;
+
+void sashidown_render_state_init(sashidown_render_state_t *state);
+
+/* Render input[start..stop) or full len when is_final. Updates *pos_io. */
+int sashidown_render_incremental(
+    sashidown_ctx_t *restrict ctx,
+    sashidown_render_state_t *restrict state,
+    const char *restrict input, size_t len,
+    size_t *pos_io,
+    size_t stop,
+    int is_final);
+
+int sashidown_render(sashidown_ctx_t *ctx, const char *input, size_t len);
+
+#endif /* MD_RENDER_H */