snark13
737c974400
- Split tests/ (libc feature tests) and examples/ (real apps); shared
app.mk in repo root, was examples/example.mk
- libc/io/* split into libc/{conio,env,errno,file,mouse,string,sys,
time,video}/ — clearer module boundaries
- New examples/mdview/: markdown viewer (Phases 1-5 + light nested
lists). Headers (H1-H4), HR, ulist/olist/quote with nesting via
leading spaces, fenced code blocks, inline emphasis (bold/italic/
underscore/code), wrap/unwrap mode with soft wrap (F2), horizontal
pan (← →) with '>' truncation indicator
- libc additions: scroll() in conio (ESTEX SCROLL), strlwr/strupr,
gets() test
- Makefile updates across tests/ for the new shared app.mk path
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
/*
|
|
* Exercises SDCC's malloc / free. The library pulls in heap.rel + malloc.rel
|
|
* from z80.lib automatically and inits the heap from crt0's _GSINIT chain.
|
|
* Default heap size is 1023 bytes — see docs/TODO.md for plans to grow it.
|
|
*/
|
|
|
|
int main(void)
|
|
{
|
|
puts("malloc test:");
|
|
|
|
/* small allocations */
|
|
char *a = (char *)malloc(20);
|
|
char *b = (char *)malloc(40);
|
|
char *c = (char *)malloc(60);
|
|
|
|
printf(" a = %p\n", a);
|
|
printf(" b = %p\n", b);
|
|
printf(" c = %p\n", c);
|
|
|
|
if (a && b && c) {
|
|
strcpy(a, "first");
|
|
strcpy(b, "second-medium-length");
|
|
strcpy(c, "third-and-the-longest-of-them-all");
|
|
printf(" a: \"%s\"\n", a);
|
|
printf(" b: \"%s\"\n", b);
|
|
printf(" c: \"%s\"\n", c);
|
|
} else {
|
|
puts(" one of the allocations FAILED");
|
|
}
|
|
|
|
/* free b, alloc smaller — should fit in the b-shaped hole */
|
|
free(b);
|
|
char *d = (char *)malloc(15);
|
|
printf(" after free(b), d = %p (expected near b)\n", d);
|
|
if (d) {
|
|
strcpy(d, "reused");
|
|
printf(" d: \"%s\"\n", d);
|
|
}
|
|
|
|
/* drain a larger allocation to see when malloc actually says no */
|
|
int total = 0;
|
|
int count = 0;
|
|
for (;;) {
|
|
void *p = malloc(64);
|
|
if (!p) break;
|
|
total += 64;
|
|
count++;
|
|
}
|
|
printf(" alloc'd %d x 64-byte blocks before failure (total %d bytes)\n",
|
|
count, total);
|
|
|
|
free(a);
|
|
free(c);
|
|
free(d);
|
|
puts("");
|
|
puts("Press any key to exit.");
|
|
(void)getchar();
|
|
return 0;
|
|
}
|