Function json_args_parse

ds4_server.c:2089–2132

        "</｜DSML｜tool_calls>\n\n"
        "String parameters should be specified as raw text and set `string=\"true\"`. "
        "Preserve characters such as `>`, `&`, and `&&` exactly; never replace normal string characters with XML or HTML entity escapes. "
        "Only if a string value itself contains the exact closing parameter tag `</｜DSML｜parameter>`, write that tag as `&lt;/｜DSML｜parameter>` inside the value. "
        "For all other types (numbers, booleans, arrays, objects), pass the value in JSON format and set `string=\"false\"`.\n\n"
        "When thinking mode is enabled, finish reasoning with </think> before any tool calls or final response.\n\n"
        "Otherwise, output directly after </think> with tool calls or final response.\n\n"
        "### Available Tool Schemas\n\n");
    buf_puts(b, tool_schemas);
    buf_puts(b, "\n\nYou MUST strictly follow the above defined tool name and parameter schemas to invoke tool calls. "
                "Use the exact parameter names from the schemas.");
}

static void append_glm_tools_prompt_text(buf *b, const char *tool_schemas) {
    if (!tool_schemas || !tool_schemas[0]) return;
    buf_puts(b,
        "## Tools\n\n"
        "You may call one or more functions to help answer the user question.\n\n"
        "You are provided with function signatures within <tools></tools> XML tags:\n"
        "<tools>\n");
    buf_puts(b, tool_schemas);
    buf_puts(b,
        "\n</tools>\n\n"
        "For each function call, use exactly this XML format:\n"
        "<tool_call>{function-name}"
        "<arg_key>{argument-name}</arg_key>"
        "<arg_value>{argument-value}</arg_value>"
        "</tool_call>\n\n"
        "Emit one <tool_call> block per function call. Use the exact tool and argument names from the schemas.");
}

static void json_escape(buf *b, const char *s);

typedef struct {
    char *key;
    char *value;
    bool is_string;
    bool used;
} json_arg;

typedef struct {
    json_arg *v;
    int len;
    int cap;
} json_args;

static void json_args_free(json_args *args) {
    for (int i = 0; i < args->len; i++) {
        free(args->v[i].key);