CSY/reowolf Files · examples/utility.c · Centrum Wiskunde & Informatica (CWI)

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Initial casting implementation

Explicit casts can be performed with the syntax 'cast<type>(input)'
and implicit casts can be performed with the syntax 'cast(input)'
where the output type is determined by inference.

To prevent casting shenanigans we only allow casting of primitive
types and of types to themselves (essentially creating a copy).

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include "../reowolf.h"

size_t get_user_msg(char * buf, size_t cap) {
	memset(buf, 0, cap);
	printf("Insert a msg of max len %zu: ", cap);
	fgets(buf, cap, stdin);
	for(size_t len = 0; len<cap; len++)
		if(buf[len]==0 || buf[len]=='\n')
			return len;
	return cap;
}
void rw_err_peek(Connector * c) {
	printf("Error str `%s`\n", reowolf_error_peek(NULL));
}

// allocates a buffer!
char * buffer_pdl(char * filename) {
	FILE *f = fopen(filename, "rb");
	if (f == NULL) {
		printf("Opening pdl file returned errno %d!\n", errno);
		exit(1);
	}
	fseek(f, 0, SEEK_END);
	long fsize = ftell(f);
	fseek(f, 0, SEEK_SET);
	char *pdl = malloc(fsize + 1);
	fread(pdl, 1, fsize, f);
	fclose(f);
	pdl[fsize] = 0;
	return pdl;
}