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libbsdl: scaffold + working BSDL parser (struct + JSON, C ABI)

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Standalone LGPL-2.1 parser for BSDL (IEEE 1149.1), shared by essim and
bs_explorer. The parser is ported from the Viveris JTAG Core loader,
decoupled from jtag_core, and extended with two extractions the original
lacks:
  - PIN_MAP_STRING -> per-port physical package pin, scalar and vector;
  - TAP_SCAN_*     -> TAP signal roles (TDI/TDO/TMS/TCK/TRST).

Exposes a stable C ABI (bsdl_parse_file/buffer -> bsdl_t, bsdl_to_json)
with a dependency-free JSON serializer and a bsdl2json CLI. CMake builds a
versioned shared library with install/export rules for find_package(bsdl).

Verified against m2gl010t, xcku040 and xcku15p (100% pin mapping, correct
IDCODEs and TAP roles); api and parse regression tests pass, clean build.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Foué
2026-06-03 10:27:13 +02:00
parent c78ff82923
commit 6b56ab5c42
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# build trees
/build/
/build-*/
/out/
cmake-build-*/
# CMake debris (if ever configured in-source)
CMakeCache.txt
CMakeFiles/
cmake_install.cmake
CTestTestfile.cmake
install_manifest.txt
*.cmake.user
# editors
.vscode/
.idea/
*.swp
# artifacts
*.o
*.a
*.so
*.so.*
*.dll
*.dylib

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cmake_minimum_required(VERSION 3.14)
project(bsdl
LANGUAGES C
VERSION 0.1.0
DESCRIPTION "Standalone BSDL (IEEE 1149.1) parser — struct + JSON, stable C ABI"
)
# --- top-level detection (PROJECT_IS_TOP_LEVEL needs CMake >= 3.21) ---
if(NOT DEFINED PROJECT_IS_TOP_LEVEL)
if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
set(PROJECT_IS_TOP_LEVEL ON)
else()
set(PROJECT_IS_TOP_LEVEL OFF)
endif()
endif()
# This is a dynamic library by nature; build shared unless told otherwise.
if(NOT DEFINED BUILD_SHARED_LIBS)
set(BUILD_SHARED_LIBS ON)
endif()
option(BSDL_BUILD_CLI "Build the bsdl2json command-line tool" ON)
option(BSDL_BUILD_TESTS "Build the test suite" ${PROJECT_IS_TOP_LEVEL})
# ---------------------------------------------------------------- library ----
add_library(bsdl
src/bsdl.c
src/bsdl_parse.c
src/bsdl_strings.c
src/bsdl_json.c
)
add_library(bsdl::bsdl ALIAS bsdl)
target_include_directories(bsdl
PUBLIC
$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
$<INSTALL_INTERFACE:include>
PRIVATE
${CMAKE_CURRENT_SOURCE_DIR}/src
)
set_target_properties(bsdl PROPERTIES
C_STANDARD 11
C_STANDARD_REQUIRED ON
C_VISIBILITY_PRESET hidden
VISIBILITY_INLINES_HIDDEN ON
VERSION ${PROJECT_VERSION}
SOVERSION ${PROJECT_VERSION_MAJOR}
PUBLIC_HEADER ${CMAKE_CURRENT_SOURCE_DIR}/include/bsdl/bsdl.h
)
# Mark exported symbols (dllexport on Windows; default-visibility on ELF).
if(BUILD_SHARED_LIBS)
target_compile_definitions(bsdl PRIVATE BSDL_BUILD_SHARED)
endif()
if(CMAKE_C_COMPILER_ID MATCHES "GNU|Clang")
target_compile_options(bsdl PRIVATE -Wall -Wextra -Wpedantic)
endif()
# -------------------------------------------------------------------- CLI ----
if(BSDL_BUILD_CLI)
add_executable(bsdl2json tools/bsdl2json.c)
target_link_libraries(bsdl2json PRIVATE bsdl)
endif()
# ------------------------------------------------------------------ tests ----
if(BSDL_BUILD_TESTS)
enable_testing()
add_subdirectory(tests)
endif()
# --------------------------------------------------- install / export -------
include(GNUInstallDirs)
include(CMakePackageConfigHelpers)
install(TARGETS bsdl
EXPORT bsdlTargets
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/bsdl
)
if(BSDL_BUILD_CLI)
install(TARGETS bsdl2json RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
endif()
install(EXPORT bsdlTargets
FILE bsdlTargets.cmake
NAMESPACE bsdl::
DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/bsdl
)
configure_package_config_file(
${CMAKE_CURRENT_SOURCE_DIR}/cmake/bsdlConfig.cmake.in
${CMAKE_CURRENT_BINARY_DIR}/bsdlConfig.cmake
INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/bsdl
)
write_basic_package_version_file(
${CMAKE_CURRENT_BINARY_DIR}/bsdlConfigVersion.cmake
VERSION ${PROJECT_VERSION}
COMPATIBILITY SameMajorVersion
)
install(FILES
${CMAKE_CURRENT_BINARY_DIR}/bsdlConfig.cmake
${CMAKE_CURRENT_BINARY_DIR}/bsdlConfigVersion.cmake
DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/bsdl
)

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README.md
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# libbsdl
A small, standalone parser for **BSDL** (IEEE 1149.1 Boundary-Scan Description
Language) files, exposing a **stable C ABI** plus an optional **JSON** output.
It is designed to be shared by two consumers:
- **bs_explorer** (C) — links the library and reads the `bsdl_t` struct directly
(boundary chain, instructions) to drive JTAG hardware.
- **essim** (C++) — consumes it either out-of-process via the `bsdl2json` CLI,
or in-process through the `extern "C"` API, for connectivity verification.
The parser core is seeded from the Viveris JTAG Core BSDL loader and extended
with the two attributes that loader omits but a netlist cross-check needs:
- **`PIN_MAP_STRING`** → each port's physical package ball/pin (`physical_pin`);
- **`TAP_SCAN_*`** → each TAP signal's role (TDI/TDO/TMS/TCK/TRST, `tap_role`).
## Status
Working. The parser extracts entity, IDCODE (+ mask), port directions, the
scalar **and** vector `PIN_MAP_STRING` (physical pins), `TAP_SCAN_*` roles, the
boundary register (with pin↔cell links) and the instruction opcodes. Verified
against real devices — `m2gl010t` (484 pins), `xcku040` (1156), `xcku15p`
(1517) — with 100% pin mapping and correct IDCODEs/TAP roles. `api` and `parse`
regression tests pass.
## Build
```sh
cmake -S . -B build
cmake --build build
ctest --test-dir build --output-on-failure
```
Produces `libbsdl.so` (+ `.so.0` / `.so.0.1.0`), the `bsdl2json` tool, and runs
the test suite. Options: `-DBSDL_BUILD_CLI=OFF`, `-DBSDL_BUILD_TESTS=OFF`,
`-DBUILD_SHARED_LIBS=OFF` (static).
## Use from CMake
```cmake
find_package(bsdl REQUIRED)
target_link_libraries(my_app PRIVATE bsdl::bsdl)
```
## API
```c
#include <bsdl/bsdl.h>
bsdl_opts_t opts;
bsdl_opts_default(&opts);
bsdl_t* m = bsdl_parse_file("device.bsd", &opts);
if (m) {
char* json = bsdl_to_json(m); /* compact JSON; free with bsdl_string_free */
/* ... or walk m->pins / m->chain / m->instructions directly ... */
bsdl_string_free(json);
bsdl_free(m);
}
```
See `include/bsdl/bsdl.h` for the full contract. The `bsdl_t` model is a
superset: extend it **additively** so the shared ABI stays stable for both
consumers.
## License
LGPL-2.1-or-later — see [LICENSE](LICENSE). The same license as its two
consumers (essim and bs_explorer are both LGPL-2.1), so code and the parser
can be shared freely; dynamic linking keeps the library replaceable. Derived
from the Viveris JTAG Core BSDL loader (© 2008–2024 Viveris Technologies,
Jean-François DEL NERO), also LGPL-2.1.

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@PACKAGE_INIT@
include("${CMAKE_CURRENT_LIST_DIR}/bsdlTargets.cmake")
check_required_components(bsdl)

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# Sample BSDL files
This directory is intentionally **not** populated with a BSDL database.
BSDL files are mandated to be freely available by IEEE 1149.1, but their
redistribution terms vary per vendor, so they are not vendored here. Point the
tests and tools at a local directory instead.
Sources:
- Vendor sites (authoritative): TI, AMD/Xilinx, Intel/Altera, Lattice, NXP, ST…
- [bsdl.info](https://bsdl.info/) — community aggregate (~14k files).
- Quartus / Vivado installs bundle BSDL for their FPGAs.
- For quick local testing, the sibling `bs_explorer` repo ships a few under
`bs_explorer/data/bsdl_files/` (xcku15p, xcku040, m2gl010t).
> Note: a *configured* FPGA's BSDL differs from the blank device — use the
> blank-device BSDL for connectivity checks.

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/*
* libbsdl - Standalone BSDL (IEEE 1149.1) parser with a stable C ABI.
*
* Copyright (c) 2026 François
* Seeded from the Viveris JTAG Core BSDL loader (Jean-François DEL NERO).
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 2.1 as
* published by the Free Software Foundation. See the LICENSE file.
*/
/**
* @file bsdl.h
* @brief Public C API for libbsdl: parse a .bsd file into a struct, or to JSON.
*
* Design notes
* ------------
* - Pure C ABI: callable as-is from C (bs_explorer) and, via `extern "C"`,
* from C++ (essim). Keep this header free of C++/struct-layout churn.
* - `bsdl_t` is a SUPERSET model; consumers read only the fields they need.
* Extend it additively (append fields/enum values) — never reorder/remove —
* so the shared .so stays ABI-stable for both projects.
* - Ownership: every pointer reachable from a `bsdl_t*` is owned by the model
* and released by bsdl_free(). Do not free individual members.
*/
#ifndef LIBBSDL_BSDL_H
#define LIBBSDL_BSDL_H
#include <stddef.h>
/* -------- version -------- */
#define BSDL_VERSION_MAJOR 0
#define BSDL_VERSION_MINOR 1
#define BSDL_VERSION_PATCH 0
#define BSDL_VERSION_STRING "0.1.0"
/* -------- symbol visibility / export -------- */
#if defined(_WIN32)
# if defined(BSDL_BUILD_SHARED)
# define BSDL_API __declspec(dllexport)
# elif !defined(BSDL_STATIC)
# define BSDL_API __declspec(dllimport)
# else
# define BSDL_API
# endif
#else
# if defined(BSDL_BUILD_SHARED)
# define BSDL_API __attribute__((visibility("default")))
# else
# define BSDL_API
# endif
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* -------- enumerations (stable values; append-only) -------- */
/** Logical port direction (from the VHDL port clause). */
typedef enum bsdl_dir {
BSDL_DIR_UNKNOWN = 0,
BSDL_DIR_IN,
BSDL_DIR_OUT,
BSDL_DIR_INOUT,
BSDL_DIR_BUFFER,
BSDL_DIR_LINKAGE /**< power / ground / NC — Viveris folds these to UNKNOWN. */
} bsdl_dir_t;
/** TAP signal role, derived from the TAP_SCAN_* attributes. */
typedef enum bsdl_tap_role {
BSDL_TAP_NONE = 0,
BSDL_TAP_TDI, /**< TAP_SCAN_IN */
BSDL_TAP_TDO, /**< TAP_SCAN_OUT */
BSDL_TAP_TMS, /**< TAP_SCAN_MODE */
BSDL_TAP_TCK, /**< TAP_SCAN_CLOCK */
BSDL_TAP_TRST /**< TAP_SCAN_RESET */
} bsdl_tap_role_t;
/** Boundary-register cell type (BC_1 .. BC_7). */
typedef enum bsdl_cell {
BSDL_CELL_UNKNOWN = 0,
BSDL_CELL_BC1, BSDL_CELL_BC2, BSDL_CELL_BC3, BSDL_CELL_BC4,
BSDL_CELL_BC5, BSDL_CELL_BC6, BSDL_CELL_BC7
} bsdl_cell_t;
/** Boundary-register cell function. */
typedef enum bsdl_bittype {
BSDL_BIT_UNKNOWN = 0,
BSDL_BIT_INPUT,
BSDL_BIT_OUTPUT,
BSDL_BIT_TRISTATE,
BSDL_BIT_INOUT,
BSDL_BIT_CONTROL,
BSDL_BIT_INTERNAL
} bsdl_bittype_t;
/** Safe / disable logic state. */
typedef enum bsdl_state {
BSDL_STATE_UNKNOWN = 0,
BSDL_STATE_UNDEF, /**< 'X' */
BSDL_STATE_HIGH, /**< '1' */
BSDL_STATE_LOW, /**< '0' */
BSDL_STATE_HIGHZ /**< 'Z' */
} bsdl_state_t;
/* -------- model structures -------- */
/** A logical port plus its physical mapping and boundary-cell links. */
typedef struct bsdl_pin {
const char* name; /**< logical port name, e.g. "TCK", "IO_A2". */
bsdl_dir_t dir;
const char* physical_pin; /**< package ball/pin from PIN_MAP_STRING, e.g. "W20"; NULL if unmapped. */
bsdl_tap_role_t tap_role; /**< non-NONE if this port is a TAP signal. */
int in_bit; /**< boundary-register input bit index, or -1. */
int out_bit; /**< boundary-register output bit index, or -1. */
int ctrl_bit; /**< controlling bit index, or -1. */
} bsdl_pin_t;
/** One entry of the BOUNDARY_REGISTER. */
typedef struct bsdl_cell_entry {
int index;
bsdl_cell_t cell;
const char* port; /**< associated port name, or "*" when unnamed. */
bsdl_bittype_t type;
bsdl_state_t safe;
int ctrl_index; /**< controlling cell index, or -1. */
bsdl_state_t disable_state;
bsdl_state_t disable_result;
} bsdl_cell_entry_t;
/** One INSTRUCTION_OPCODE entry. */
typedef struct bsdl_instr {
const char* name; /**< e.g. "IDCODE", "EXTEST", "BYPASS", "SAMPLE". */
const char* opcode; /**< bit string, e.g. "001000". */
} bsdl_instr_t;
/** The parsed device model. All pointers owned by the model (see bsdl_free). */
typedef struct bsdl {
const char* entity; /**< entity name (device identifier). */
const char* src_filename; /**< basename of the source file. */
unsigned long idcode; /**< IDCODE value (X bits read as 0). */
unsigned long idcode_mask; /**< 1 where the IDCODE bit is fixed, 0 where 'X'. */
int instruction_length;
bsdl_pin_t* pins; size_t pin_count;
bsdl_cell_entry_t* chain; size_t chain_count;
bsdl_instr_t* instructions; size_t instruction_count;
} bsdl_t;
/* -------- options & diagnostics -------- */
typedef enum bsdl_log_level {
BSDL_LOG_ERROR = 0,
BSDL_LOG_WARN,
BSDL_LOG_INFO,
BSDL_LOG_DEBUG
} bsdl_log_level_t;
/** Optional diagnostic sink. Replaces Viveris' jtag_core logging dependency. */
typedef void (*bsdl_log_fn)(bsdl_log_level_t level, const char* msg, void* user);
typedef struct bsdl_opts {
int sort_pins_by_name; /**< replaces the BSDL_LOADER_SORT_PINS_NAME env var. */
bsdl_log_fn log; /**< may be NULL. */
void* log_user; /**< passed back to `log`. */
} bsdl_opts_t;
/** Fill `opts` with defaults (no sorting, no logging). */
BSDL_API void bsdl_opts_default(bsdl_opts_t* opts);
/* -------- API -------- */
/** Parse a BSDL file. Returns NULL on error. Free with bsdl_free(). */
BSDL_API bsdl_t* bsdl_parse_file(const char* path, const bsdl_opts_t* opts);
/** Parse a BSDL document held in memory. `name` is recorded as src_filename. */
BSDL_API bsdl_t* bsdl_parse_buffer(const char* text, size_t len,
const char* name, const bsdl_opts_t* opts);
/** Release a model returned by a bsdl_parse_* function. NULL-safe. */
BSDL_API void bsdl_free(bsdl_t* model);
/** Serialize a model to a freshly allocated JSON string (compact, UTF-8).
* Returns NULL on allocation failure or NULL input. Free with bsdl_string_free(). */
BSDL_API char* bsdl_to_json(const bsdl_t* model);
/** Free a string returned by bsdl_to_json(). NULL-safe. */
BSDL_API void bsdl_string_free(char* s);
/** Library version, e.g. "0.1.0". */
BSDL_API const char* bsdl_version(void);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* LIBBSDL_BSDL_H */

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/*
* libbsdl - core: lifecycle helpers (version, options, teardown).
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* The parser itself lives in bsdl_parse.c; serialization in bsdl_json.c.
*/
#include <stdlib.h>
#include "bsdl/bsdl.h"
const char* bsdl_version(void)
{
return BSDL_VERSION_STRING;
}
void bsdl_opts_default(bsdl_opts_t* opts)
{
if (!opts)
return;
opts->sort_pins_by_name = 0;
opts->log = NULL;
opts->log_user = NULL;
}
void bsdl_free(bsdl_t* model)
{
size_t i;
if (!model)
return;
free((void*)model->entity);
free((void*)model->src_filename);
for (i = 0; i < model->pin_count; i++) {
free((void*)model->pins[i].name);
free((void*)model->pins[i].physical_pin);
}
free(model->pins);
for (i = 0; i < model->chain_count; i++)
free((void*)model->chain[i].port);
free(model->chain);
for (i = 0; i < model->instruction_count; i++) {
free((void*)model->instructions[i].name);
free((void*)model->instructions[i].opcode);
}
free(model->instructions);
free(model);
}

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/*
* libbsdl - JSON serialization (the optional output layer essim consumes).
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* Self-contained: a tiny growable string buffer, no external JSON dependency.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "bsdl/bsdl.h"
/* ---- growable string buffer ---- */
typedef struct {
char* buf;
size_t len;
size_t cap;
int oom; /* sticky out-of-memory flag */
} sb_t;
static void sb_reserve(sb_t* sb, size_t extra)
{
size_t need;
char* p;
if (sb->oom)
return;
need = sb->len + extra + 1;
if (need <= sb->cap)
return;
while (sb->cap < need)
sb->cap = sb->cap ? sb->cap * 2 : 256;
p = (char*)realloc(sb->buf, sb->cap);
if (!p) { sb->oom = 1; return; }
sb->buf = p;
}
static void sb_putc(sb_t* sb, char c)
{
sb_reserve(sb, 1);
if (sb->oom) return;
sb->buf[sb->len++] = c;
}
static void sb_puts(sb_t* sb, const char* s)
{
size_t n;
if (!s) s = "";
n = strlen(s);
sb_reserve(sb, n);
if (sb->oom) return;
memcpy(sb->buf + sb->len, s, n);
sb->len += n;
}
/* Append a JSON string literal (with quotes) for `s`, or `null` if s == NULL. */
static void sb_json_str(sb_t* sb, const char* s)
{
if (!s) { sb_puts(sb, "null"); return; }
sb_putc(sb, '"');
for (; *s; s++) {
unsigned char c = (unsigned char)*s;
switch (c) {
case '"': sb_puts(sb, "\\\""); break;
case '\\': sb_puts(sb, "\\\\"); break;
case '\b': sb_puts(sb, "\\b"); break;
case '\f': sb_puts(sb, "\\f"); break;
case '\n': sb_puts(sb, "\\n"); break;
case '\r': sb_puts(sb, "\\r"); break;
case '\t': sb_puts(sb, "\\t"); break;
default:
if (c < 0x20) {
char esc[7];
snprintf(esc, sizeof(esc), "\\u%04x", c);
sb_puts(sb, esc);
} else {
sb_putc(sb, (char)c);
}
}
}
sb_putc(sb, '"');
}
static void sb_json_int(sb_t* sb, long v)
{
char tmp[32];
snprintf(tmp, sizeof(tmp), "%ld", v);
sb_puts(sb, tmp);
}
static void sb_json_hex32(sb_t* sb, unsigned long v)
{
char tmp[16];
snprintf(tmp, sizeof(tmp), "\"0x%08lX\"", v & 0xFFFFFFFFUL);
sb_puts(sb, tmp);
}
/* Append `"key":` (object member key). */
static void sb_key(sb_t* sb, const char* k)
{
sb_json_str(sb, k);
sb_putc(sb, ':');
}
/* ---- enum -> token ---- */
static const char* dir_str(bsdl_dir_t d)
{
switch (d) {
case BSDL_DIR_IN: return "in";
case BSDL_DIR_OUT: return "out";
case BSDL_DIR_INOUT: return "inout";
case BSDL_DIR_BUFFER: return "buffer";
case BSDL_DIR_LINKAGE: return "linkage";
default: return "unknown";
}
}
static const char* tap_str(bsdl_tap_role_t t)
{
switch (t) {
case BSDL_TAP_TDI: return "tdi";
case BSDL_TAP_TDO: return "tdo";
case BSDL_TAP_TMS: return "tms";
case BSDL_TAP_TCK: return "tck";
case BSDL_TAP_TRST: return "trst";
default: return "none";
}
}
static const char* cell_str(bsdl_cell_t c)
{
switch (c) {
case BSDL_CELL_BC1: return "BC_1";
case BSDL_CELL_BC2: return "BC_2";
case BSDL_CELL_BC3: return "BC_3";
case BSDL_CELL_BC4: return "BC_4";
case BSDL_CELL_BC5: return "BC_5";
case BSDL_CELL_BC6: return "BC_6";
case BSDL_CELL_BC7: return "BC_7";
default: return "unknown";
}
}
static const char* bittype_str(bsdl_bittype_t b)
{
switch (b) {
case BSDL_BIT_INPUT: return "input";
case BSDL_BIT_OUTPUT: return "output";
case BSDL_BIT_TRISTATE: return "tristate";
case BSDL_BIT_INOUT: return "inout";
case BSDL_BIT_CONTROL: return "control";
case BSDL_BIT_INTERNAL: return "internal";
default: return "unknown";
}
}
static const char* state_str(bsdl_state_t s)
{
switch (s) {
case BSDL_STATE_UNDEF: return "X";
case BSDL_STATE_HIGH: return "1";
case BSDL_STATE_LOW: return "0";
case BSDL_STATE_HIGHZ: return "Z";
default: return "unknown";
}
}
char* bsdl_to_json(const bsdl_t* m)
{
sb_t sb = { NULL, 0, 0, 0 };
size_t i;
if (!m)
return NULL;
sb_putc(&sb, '{');
sb_key(&sb, "entity"); sb_json_str(&sb, m->entity); sb_putc(&sb, ',');
sb_key(&sb, "src_filename"); sb_json_str(&sb, m->src_filename); sb_putc(&sb, ',');
sb_key(&sb, "idcode"); sb_json_hex32(&sb, m->idcode); sb_putc(&sb, ',');
sb_key(&sb, "idcode_mask"); sb_json_hex32(&sb, m->idcode_mask); sb_putc(&sb, ',');
sb_key(&sb, "instruction_length"); sb_json_int(&sb, m->instruction_length); sb_putc(&sb, ',');
/* pins */
sb_key(&sb, "pins");
sb_putc(&sb, '[');
for (i = 0; i < m->pin_count; i++) {
const bsdl_pin_t* p = &m->pins[i];
if (i) sb_putc(&sb, ',');
sb_putc(&sb, '{');
sb_key(&sb, "name"); sb_json_str(&sb, p->name); sb_putc(&sb, ',');
sb_key(&sb, "dir"); sb_json_str(&sb, dir_str(p->dir)); sb_putc(&sb, ',');
sb_key(&sb, "physical_pin"); sb_json_str(&sb, p->physical_pin); sb_putc(&sb, ',');
sb_key(&sb, "tap_role"); sb_json_str(&sb, tap_str(p->tap_role)); sb_putc(&sb, ',');
sb_key(&sb, "in_bit"); sb_json_int(&sb, p->in_bit); sb_putc(&sb, ',');
sb_key(&sb, "out_bit"); sb_json_int(&sb, p->out_bit); sb_putc(&sb, ',');
sb_key(&sb, "ctrl_bit"); sb_json_int(&sb, p->ctrl_bit);
sb_putc(&sb, '}');
}
sb_putc(&sb, ']');
sb_putc(&sb, ',');
/* boundary chain */
sb_key(&sb, "chain");
sb_putc(&sb, '[');
for (i = 0; i < m->chain_count; i++) {
const bsdl_cell_entry_t* c = &m->chain[i];
if (i) sb_putc(&sb, ',');
sb_putc(&sb, '{');
sb_key(&sb, "index"); sb_json_int(&sb, c->index); sb_putc(&sb, ',');
sb_key(&sb, "cell"); sb_json_str(&sb, cell_str(c->cell)); sb_putc(&sb, ',');
sb_key(&sb, "port"); sb_json_str(&sb, c->port); sb_putc(&sb, ',');
sb_key(&sb, "type"); sb_json_str(&sb, bittype_str(c->type)); sb_putc(&sb, ',');
sb_key(&sb, "safe"); sb_json_str(&sb, state_str(c->safe)); sb_putc(&sb, ',');
sb_key(&sb, "ctrl_index"); sb_json_int(&sb, c->ctrl_index); sb_putc(&sb, ',');
sb_key(&sb, "disable_state"); sb_json_str(&sb, state_str(c->disable_state)); sb_putc(&sb, ',');
sb_key(&sb, "disable_result"); sb_json_str(&sb, state_str(c->disable_result));
sb_putc(&sb, '}');
}
sb_putc(&sb, ']');
sb_putc(&sb, ',');
/* instructions */
sb_key(&sb, "instructions");
sb_putc(&sb, '[');
for (i = 0; i < m->instruction_count; i++) {
const bsdl_instr_t* in = &m->instructions[i];
if (i) sb_putc(&sb, ',');
sb_putc(&sb, '{');
sb_key(&sb, "name"); sb_json_str(&sb, in->name); sb_putc(&sb, ',');
sb_key(&sb, "opcode"); sb_json_str(&sb, in->opcode);
sb_putc(&sb, '}');
}
sb_putc(&sb, ']');
sb_putc(&sb, '}');
if (sb.oom) {
free(sb.buf);
return NULL;
}
sb.buf[sb.len] = '\0';
return sb.buf;
}
void bsdl_string_free(char* s)
{
free(s);
}

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/*
* libbsdl - internal keyword lookup tables.
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include <string.h>
#include "bsdl/bsdl.h"
#include "bsdl_strings.h"
const bsdl_kw_t bsdl_dir_kw[] = {
{ "IN", BSDL_DIR_IN },
{ "OUT", BSDL_DIR_OUT },
{ "INOUT", BSDL_DIR_INOUT },
{ "BUFFER", BSDL_DIR_BUFFER },
{ "LINKAGE", BSDL_DIR_LINKAGE }, /* power / gnd / NC — kept, unlike Viveris. */
{ 0, BSDL_DIR_UNKNOWN }
};
const bsdl_kw_t bsdl_cell_kw[] = {
{ "BC_1", BSDL_CELL_BC1 }, { "BC_2", BSDL_CELL_BC2 },
{ "BC_3", BSDL_CELL_BC3 }, { "BC_4", BSDL_CELL_BC4 },
{ "BC_5", BSDL_CELL_BC5 }, { "BC_6", BSDL_CELL_BC6 },
{ "BC_7", BSDL_CELL_BC7 },
{ 0, BSDL_CELL_UNKNOWN }
};
const bsdl_kw_t bsdl_bittype_kw[] = {
{ "INPUT", BSDL_BIT_INPUT },
{ "OBSERVE_ONLY", BSDL_BIT_INPUT },
{ "OUTPUT", BSDL_BIT_OUTPUT },
{ "OUTPUT2", BSDL_BIT_OUTPUT },
{ "OUTPUT3", BSDL_BIT_TRISTATE },
{ "BIDIR", BSDL_BIT_INOUT },
{ "CONTROL", BSDL_BIT_CONTROL },
{ "CONTROLR", BSDL_BIT_CONTROL },
{ "INTERNAL", BSDL_BIT_INTERNAL },
{ 0, BSDL_BIT_UNKNOWN }
};
const bsdl_kw_t bsdl_state_kw[] = {
{ "X", BSDL_STATE_UNDEF }, { "1", BSDL_STATE_HIGH },
{ "0", BSDL_STATE_LOW }, { "Z", BSDL_STATE_HIGHZ },
{ 0, BSDL_STATE_UNKNOWN }
};
const bsdl_kw_t bsdl_tap_kw[] = {
{ "TAP_SCAN_IN", BSDL_TAP_TDI },
{ "TAP_SCAN_OUT", BSDL_TAP_TDO },
{ "TAP_SCAN_MODE", BSDL_TAP_TMS },
{ "TAP_SCAN_CLOCK", BSDL_TAP_TCK },
{ "TAP_SCAN_RESET", BSDL_TAP_TRST },
{ 0, BSDL_TAP_NONE }
};
int bsdl_kw_lookup(const bsdl_kw_t* table, const char* name)
{
int i;
if (!table || !name)
return 0;
for (i = 0; table[i].name; i++) {
if (!strcmp(table[i].name, name))
return table[i].code;
}
return table[i].code; /* terminator code = UNKNOWN/NONE */
}

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/*
* libbsdl - internal keyword lookup tables.
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* These map BSDL tokens onto the public enums. They are the seed for the
* parser port from Viveris, and already extend it with the two attributes
* Viveris omits: LINKAGE ports and the TAP_SCAN_* roles.
*/
#ifndef LIBBSDL_BSDL_STRINGS_H
#define LIBBSDL_BSDL_STRINGS_H
typedef struct bsdl_kw {
const char* name; /* BSDL token, upper-cased before lookup. */
int code; /* corresponding bsdl_* enum value. */
} bsdl_kw_t;
extern const bsdl_kw_t bsdl_dir_kw[]; /* -> bsdl_dir_t */
extern const bsdl_kw_t bsdl_cell_kw[]; /* -> bsdl_cell_t */
extern const bsdl_kw_t bsdl_bittype_kw[]; /* -> bsdl_bittype_t */
extern const bsdl_kw_t bsdl_state_kw[]; /* -> bsdl_state_t */
extern const bsdl_kw_t bsdl_tap_kw[]; /* -> bsdl_tap_role_t */
/* Linear lookup; returns the first table entry's code (UNKNOWN/NONE) if absent. */
int bsdl_kw_lookup(const bsdl_kw_t* table, const char* name);
#endif /* LIBBSDL_BSDL_STRINGS_H */

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add_executable(test_api test_api.c)
target_link_libraries(test_api PRIVATE bsdl)
add_test(NAME api COMMAND test_api)
add_executable(test_parse test_parse.c)
target_link_libraries(test_parse PRIVATE bsdl)
add_test(NAME parse COMMAND test_parse)

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/*
* libbsdl - API test: exercises the lifecycle + JSON layer.
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "bsdl/bsdl.h"
static int failures = 0;
#define CHECK(cond) do { \
if (!(cond)) { \
fprintf(stderr, "FAIL %s:%d: %s\n", __FILE__, __LINE__, #cond); \
failures++; \
} \
} while (0)
int main(void)
{
bsdl_opts_t opts;
bsdl_t model;
char* json;
/* version is reported and matches the compiled-in macro */
CHECK(bsdl_version() != NULL);
CHECK(strcmp(bsdl_version(), BSDL_VERSION_STRING) == 0);
/* defaults are sane */
bsdl_opts_default(&opts);
CHECK(opts.sort_pins_by_name == 0);
CHECK(opts.log == NULL);
CHECK(opts.log_user == NULL);
/* defined behaviour on bad input */
CHECK(bsdl_parse_file(NULL, &opts) == NULL);
CHECK(bsdl_parse_file("/nonexistent/does-not-exist.bsd", NULL) == NULL);
CHECK(bsdl_to_json(NULL) == NULL);
bsdl_free(NULL); /* must be NULL-safe */
bsdl_string_free(NULL); /* must be NULL-safe */
/* JSON layer over a hand-built model (independent of the parser) */
{
static bsdl_pin_t pins[1];
static bsdl_instr_t instrs[1];
memset(&model, 0, sizeof(model));
memset(pins, 0, sizeof(pins));
memset(instrs, 0, sizeof(instrs));
pins[0].name = "TCK";
pins[0].dir = BSDL_DIR_IN;
pins[0].physical_pin = "W20";
pins[0].tap_role = BSDL_TAP_TCK;
pins[0].in_bit = -1;
pins[0].out_bit = -1;
pins[0].ctrl_bit = -1;
instrs[0].name = "IDCODE";
instrs[0].opcode = "001001";
model.entity = "DEMO";
model.src_filename = "demo.bsd";
model.idcode = 0x12345678UL;
model.idcode_mask = 0xFFFFFFFFUL;
model.instruction_length = 6;
model.pins = pins;
model.pin_count = 1;
model.instructions = instrs;
model.instruction_count = 1;
json = bsdl_to_json(&model);
CHECK(json != NULL);
if (json) {
CHECK(strstr(json, "\"entity\":\"DEMO\"") != NULL);
CHECK(strstr(json, "\"physical_pin\":\"W20\"") != NULL);
CHECK(strstr(json, "\"tap_role\":\"tck\"") != NULL);
CHECK(strstr(json, "\"idcode\":\"0x12345678\"") != NULL);
CHECK(strstr(json, "\"name\":\"IDCODE\"") != NULL);
bsdl_string_free(json);
}
}
if (failures) {
fprintf(stderr, "%d check(s) failed\n", failures);
return 1;
}
printf("all API checks passed\n");
return 0;
}

154
tests/test_parse.c Normal file
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/*
* libbsdl - parser regression test over a synthetic in-memory BSDL.
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* Exercises: entity, IDCODE, port directions, scalar + vector PIN_MAP,
* TAP_SCAN roles, boundary register, instruction opcodes.
*/
#include <stdio.h>
#include <string.h>
#include "bsdl/bsdl.h"
static int failures = 0;
#define CHECK(cond) do { \
if (!(cond)) { \
fprintf(stderr, "FAIL %s:%d: %s\n", __FILE__, __LINE__, #cond); \
failures++; \
} \
} while (0)
static const char DEMO[] =
"entity DEMO is\n"
" generic (PHYSICAL_PIN_MAP : string := \"PKG\");\n"
" port (\n"
" TCK:in bit;\n"
" TDI:in bit;\n"
" TDO:out bit;\n"
" TMS:in bit;\n"
" Q:out bit_vector(0 to 1);\n"
" VCC:linkage bit;\n"
" GND:linkage bit_vector(0 to 1)\n"
" );\n"
" use STD_1149_1_2001.all;\n"
" attribute PIN_MAP of DEMO : entity is PHYSICAL_PIN_MAP;\n"
" constant PKG : PIN_MAP_STRING :=\n"
" \"TCK:1,\" &\n"
" \"TDI:2,\" &\n"
" \"TDO:3,\" &\n"
" \"TMS:4,\" &\n"
" \"Q:(5,6),\" &\n"
" \"VCC:7,\" &\n"
" \"GND:(8,9)\";\n"
" attribute TAP_SCAN_IN of TDI : signal is true;\n"
" attribute TAP_SCAN_MODE of TMS : signal is true;\n"
" attribute TAP_SCAN_OUT of TDO : signal is true;\n"
" attribute TAP_SCAN_CLOCK of TCK : signal is (10.0e6, BOTH);\n"
" attribute INSTRUCTION_LENGTH of DEMO : entity is 4;\n"
" attribute INSTRUCTION_OPCODE of DEMO : entity is\n"
" \"BYPASS (1111),\" &\n"
" \"EXTEST (0000),\" &\n"
" \"SAMPLE (0001),\" &\n"
" \"IDCODE (1110)\";\n"
" attribute IDCODE_REGISTER of DEMO : entity is\n"
" \"0001\" &\n"
" \"0010001101000101\" &\n"
" \"00000000111\" &\n"
" \"1\";\n"
" attribute BOUNDARY_LENGTH of DEMO : entity is 3;\n"
" attribute BOUNDARY_REGISTER of DEMO : entity is\n"
" \"0 (BC_1, Q(0), output3, X, 2, 1, Z),\" &\n"
" \"1 (BC_1, Q(1), output3, X, 2, 1, Z),\" &\n"
" \"2 (BC_1, *, control, 1)\";\n"
"end DEMO;\n";
static const bsdl_pin_t *pin(const bsdl_t *m, const char *name)
{
size_t i;
for (i = 0; i < m->pin_count; i++)
if (!strcmp(m->pins[i].name, name))
return &m->pins[i];
return NULL;
}
static int has_instr(const bsdl_t *m, const char *name, const char *opcode)
{
size_t i;
for (i = 0; i < m->instruction_count; i++)
if (!strcmp(m->instructions[i].name, name) &&
!strcmp(m->instructions[i].opcode, opcode))
return 1;
return 0;
}
int main(void)
{
bsdl_opts_t opts;
bsdl_t *m;
const bsdl_pin_t *p;
bsdl_opts_default(&opts);
m = bsdl_parse_buffer(DEMO, sizeof(DEMO) - 1, "demo.bsd", &opts);
CHECK(m != NULL);
if (!m) {
fprintf(stderr, "parse returned NULL\n");
return 1;
}
/* header */
CHECK(strcmp(m->entity, "DEMO") == 0);
CHECK(m->idcode == 0x1234500FUL);
CHECK(m->idcode_mask == 0xFFFFFFFFUL);
CHECK(m->instruction_length == 4);
/* 4 scalars + Q(0..1) + VCC + GND(0..1) = 9 */
CHECK(m->pin_count == 9);
/* scalar pin + TAP role + physical pin */
p = pin(m, "TCK");
CHECK(p && p->dir == BSDL_DIR_IN && p->tap_role == BSDL_TAP_TCK &&
p->physical_pin && !strcmp(p->physical_pin, "1"));
p = pin(m, "TDI");
CHECK(p && p->tap_role == BSDL_TAP_TDI && !strcmp(p->physical_pin, "2"));
p = pin(m, "TDO");
CHECK(p && p->dir == BSDL_DIR_OUT && p->tap_role == BSDL_TAP_TDO);
p = pin(m, "TMS");
CHECK(p && p->tap_role == BSDL_TAP_TMS);
/* vector PIN_MAP, positional: Q(0)->5, Q(1)->6 */
p = pin(m, "Q(0)");
CHECK(p && p->dir == BSDL_DIR_OUT && p->physical_pin && !strcmp(p->physical_pin, "5"));
p = pin(m, "Q(1)");
CHECK(p && p->physical_pin && !strcmp(p->physical_pin, "6"));
/* linkage scalar + vector */
p = pin(m, "VCC");
CHECK(p && p->dir == BSDL_DIR_LINKAGE && !strcmp(p->physical_pin, "7"));
p = pin(m, "GND(0)");
CHECK(p && p->dir == BSDL_DIR_LINKAGE && !strcmp(p->physical_pin, "8"));
p = pin(m, "GND(1)");
CHECK(p && !strcmp(p->physical_pin, "9"));
/* boundary register linkage to pins (tristate output cell) */
CHECK(m->chain_count == 3);
p = pin(m, "Q(0)");
CHECK(p && p->out_bit == 0 && p->ctrl_bit == 2);
p = pin(m, "Q(1)");
CHECK(p && p->out_bit == 1 && p->ctrl_bit == 2);
/* instructions */
CHECK(has_instr(m, "IDCODE", "1110"));
CHECK(has_instr(m, "EXTEST", "0000"));
CHECK(has_instr(m, "BYPASS", "1111"));
CHECK(has_instr(m, "SAMPLE", "0001"));
bsdl_free(m);
if (failures) {
fprintf(stderr, "%d check(s) failed\n", failures);
return 1;
}
printf("all parse checks passed\n");
return 0;
}

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/*
* bsdl2json - parse a BSDL file and print the model as JSON on stdout.
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* Thin frontend over libbsdl. essim invokes this out-of-process; bs_explorer
* links the library directly and uses the struct instead.
*/
#include <stdio.h>
#include <string.h>
#include "bsdl/bsdl.h"
static void log_cb(bsdl_log_level_t level, const char* msg, void* user)
{
static const char* const names[] = { "ERROR", "WARN", "INFO", "DEBUG" };
(void)user;
fprintf(stderr, "[bsdl:%s] %s\n", names[level], msg);
}
static void usage(const char* argv0)
{
fprintf(stderr,
"libbsdl %s\n"
"usage: %s [--quiet] <file.bsd>\n"
" prints the parsed BSDL model as JSON on stdout\n",
bsdl_version(), argv0);
}
int main(int argc, char** argv)
{
bsdl_opts_t opts;
const char* path = NULL;
int quiet = 0;
int i;
bsdl_t* model;
char* json;
for (i = 1; i < argc; i++) {
if (!strcmp(argv[i], "--quiet") || !strcmp(argv[i], "-q")) {
quiet = 1;
} else if (!strcmp(argv[i], "--help") || !strcmp(argv[i], "-h")) {
usage(argv[0]);
return 0;
} else if (argv[i][0] == '-') {
fprintf(stderr, "unknown option: %s\n", argv[i]);
usage(argv[0]);
return 2;
} else {
path = argv[i];
}
}
if (!path) {
usage(argv[0]);
return 2;
}
bsdl_opts_default(&opts);
if (!quiet)
opts.log = log_cb;
model = bsdl_parse_file(path, &opts);
if (!model) {
fprintf(stderr, "error: failed to parse %s\n", path);
return 1;
}
json = bsdl_to_json(model);
if (json) {
fputs(json, stdout);
fputc('\n', stdout);
bsdl_string_free(json);
}
bsdl_free(model);
return 0;
}