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/* processlines.c */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "duktape.h"
/* For brevity assumes a maximum file length of 16kB. */
static void push_file_as_string(duk_context *ctx, const char *filename) {
FILE *f;
size_t len;
char buf[16384];
f = fopen(filename, "rb");
if (f) {
len = fread((void *) buf, 1, sizeof(buf), f);
fclose(f);
duk_push_lstring(ctx, (const char *) buf, (duk_size_t) len);
} else {
duk_push_undefined(ctx);
}
}
int main(int argc, const char *argv[]) {
duk_context *ctx = NULL;
char line[4096];
size_t idx;
int ch;
(void) argc; (void) argv;
ctx = duk_create_heap_default();
if (!ctx) {
printf("Failed to create a Duktape heap.\n");
exit(1);
}
push_file_as_string(ctx, "process.js");
if (duk_peval(ctx) != 0) {
printf("Error: %s\n", duk_safe_to_string(ctx, -1));
goto finished;
}
duk_pop(ctx); /* ignore result */
memset(line, 0, sizeof(line));
idx = 0;
for (;;) {
if (idx >= sizeof(line)) {
printf("Line too long\n");
exit(1);
}
ch = fgetc(stdin);
if (ch == 0x0a) {
line[idx++] = '\0';
duk_push_global_object(ctx);
duk_get_prop_string(ctx, -1 /*index*/, "processLine");
duk_push_string(ctx, line);
if (duk_pcall(ctx, 1 /*nargs*/) != 0) {
printf("Error: %s\n", duk_safe_to_string(ctx, -1));
} else {
printf("%s\n", duk_safe_to_string(ctx, -1));
}
duk_pop(ctx); /* pop result/error */
idx = 0;
} else if (ch == EOF) {
break;
} else {
line[idx++] = (char) ch;
}
}
finished:
duk_destroy_heap(ctx);
exit(0);
}