llparse/lib/compiler/header-builder.js

Compile incremental parsers to C code

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.HeaderBuilder = void 0;
class HeaderBuilder {
    build(options) {
        let res = '';
        const PREFIX = options.prefix.toUpperCase().replace(/[^a-z]/gi, '_');
        const DEFINE = options.headerGuard === undefined ?
            `INCLUDE_${PREFIX}_H_` :
            options.headerGuard;
        res += `#ifndef ${DEFINE}\n`;
        res += `#define ${DEFINE}\n`;
        res += '#ifdef __cplusplus\n';
        res += 'extern "C" {\n';
        res += '#endif\n';
        res += '\n';
        res += '#include <stdint.h>\n';
        res += '\n';
        // Structure
        res += `typedef struct ${options.prefix}_s ${options.prefix}_t;\n`;
        res += `struct ${options.prefix}_s {\n`;
        res += '  int32_t _index;\n';
        for (const [index, field] of options.spans.entries()) {
            res += `  void* _span_pos${index};\n`;
            if (field.callbacks.length > 1) {
                res += `  void* _span_cb${index};\n`;
            }
        }
        res += '  int32_t error;\n';
        res += '  const char* reason;\n';
        res += '  const char* error_pos;\n';
        res += '  void* data;\n';
        res += '  void* _current;\n';
        for (const prop of options.properties) {
            let ty;
            if (prop.ty === 'i8') {
                ty = 'uint8_t';
            }
            else if (prop.ty === 'i16') {
                ty = 'uint16_t';
            }
            else if (prop.ty === 'i32') {
                ty = 'uint32_t';
            }
            else if (prop.ty === 'i64') {
                ty = 'uint64_t';
            }
            else if (prop.ty === 'ptr') {
                ty = 'void*';
            }
            else {
                throw new Error(`Unknown state property type: "${prop.ty}"`);
            }
            res += `  ${ty} ${prop.name};\n`;
        }
        res += '};\n';
        res += '\n';
        res += `int ${options.prefix}_init(${options.prefix}_t* s);\n`;
        res += `int ${options.prefix}_execute(${options.prefix}_t* s, ` +
            'const char* p, const char* endp);\n';
        res += '\n';
        res += '#ifdef __cplusplus\n';
        res += '}  /* extern "C" */\n';
        res += '#endif\n';
        res += `#endif  /* ${DEFINE} */\n`;
        return res;
    }
}
exports.HeaderBuilder = HeaderBuilder;
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