77 lines
1.4 KiB
C
77 lines
1.4 KiB
C
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/*
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* Pretty print JSON from stdin into indented JX.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "duktape.h"
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static duk_ret_t duk__print(duk_context *ctx) {
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duk_push_string(ctx, " ");
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duk_insert(ctx, 0);
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duk_join(ctx, duk_get_top(ctx) - 1);
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printf("%s\n", duk_safe_to_string(ctx, -1));
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return 0;
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}
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static duk_ret_t do_jxpretty(duk_context *ctx, void *udata) {
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FILE *f = stdin;
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char buf[4096];
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size_t ret;
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(void) udata;
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for (;;) {
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if (ferror(f)) {
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(void) duk_error(ctx, DUK_ERR_ERROR, "ferror() on stdin");
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}
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if (feof(f)) {
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break;
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}
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ret = fread(buf, 1, sizeof(buf), f);
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#if 0
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fprintf(stderr, "Read: %ld\n", (long) ret);
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fflush(stderr);
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#endif
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if (ret == 0) {
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break;
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}
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duk_require_stack(ctx, 1);
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duk_push_lstring(ctx, (const char *) buf, ret);
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}
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duk_concat(ctx, duk_get_top(ctx));
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duk_eval_string(ctx, "(function (v) { print(Duktape.enc('jx', JSON.parse(v), null, 4)); })");
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duk_insert(ctx, -2);
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duk_call(ctx, 1);
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return 0;
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}
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int main(int argc, char *argv[]) {
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duk_context *ctx;
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duk_int_t rc;
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/* suppress warnings */
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(void) argc;
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(void) argv;
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ctx = duk_create_heap_default();
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duk_push_c_function(ctx, duk__print, DUK_VARARGS);
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duk_put_global_string(ctx, "print");
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rc = duk_safe_call(ctx, do_jxpretty, NULL, 0 /*nargs*/, 1 /*nrets*/);
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if (rc) {
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fprintf(stderr, "ERROR: %s\n", duk_safe_to_string(ctx, -1));
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fflush(stderr);
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}
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duk_destroy_heap(ctx);
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return 0;
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}
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