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#!/usr/bin/env python3
"""Generate flat-array C wrappers for all ts functions.
Each wrapper takes flat input/output arrays instead of pointer-of-pointers,
eliminating ctypes pointer marshaling overhead.
"""
import argparse
import importlib.util
import os
import sys
_spec = importlib.util.spec_from_file_location(
"ts_parser",
os.path.join(os.path.dirname(os.path.abspath(__file__)), "ts_parser.py"),
)
if _spec and _spec.loader:
_ts_parser = importlib.util.module_from_spec(_spec)
_spec.loader.exec_module(_ts_parser)
parse_all = _ts_parser.parse_all
else:
print("Error: could not load ts_parser", file=sys.stderr)
sys.exit(1)
ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
OUT = os.path.join(ROOT, "lib", "ts_flat_generated.c")
def generate_wrappers(funcs, dry_run=False):
"""Generate flat-array C wrapper functions."""
if dry_run:
print(f"[dry-run] Would generate {len(funcs)} flat wrappers -> {OUT}")
return
with open(OUT, "w", encoding="utf-8") as f:
f.write("/* Auto-generated flat-array wrappers. Do not edit. */\n\n")
f.write("#include <string.h>\n")
f.write('#include "ts.h"\n\n')
for fm in funcs:
safe_x_n = max(fm.x_n, 1)
safe_y_n = max(fm.y_n, 1)
f.write(f"/* {fm.name}: x_n={fm.x_n}, y_n={fm.y_n}, c_n={fm.c_n} */\n")
f.write(f"int ts_{fm.name}_flat(\n")
for i in range(fm.y_n):
f.write(f" fp_t *y{i},\n")
for i in range(fm.x_n):
f.write(f" fp_t const *x{i},\n")
f.write(f" uint_t n,\n")
f.write(f" ts_constant_t const *params\n")
f.write(f")\n{{\n")
f.write(f" fp_t * const _y[{safe_y_n}] = {{")
f.write(", ".join(f"y{i}" for i in range(fm.y_n)))
f.write("};\n")
f.write(f" fp_t const * const _x[{safe_x_n}] = {{")
f.write(", ".join(f"x{i}" for i in range(fm.x_n)))
f.write("};\n")
for i in range(fm.y_n):
f.write(f" memset(y{i}, 0, n * sizeof(fp_t));\n")
f.write(
f" return ts_{fm.name}(_y, {fm.y_n}, _x, {fm.x_n}, n, params);\n"
)
f.write("}\n\n")
def main():
parser = argparse.ArgumentParser(description="Generate flat-array C wrappers")
parser.add_argument(
"--dry-run",
action="store_true",
help="Print what would be generated without writing",
)
args = parser.parse_args()
funcs = parse_all(detect_x_access=True)
if not funcs:
print("Warning: no ts_parameter declarations found.", file=sys.stderr)
sys.exit(1)
generate_wrappers(funcs, dry_run=args.dry_run)
if not args.dry_run:
print(f"Generated {len(funcs)} flat wrappers -> {OUT}")
if __name__ == "__main__":
main()
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