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#include "all.h"
u32
fnv1a(u32 h, const void *p, size_t length) {
const u8 *data = p;
size_t i = 0;
while (i != length) {
h ^= data[i++];
h *= 0x01000193;
}
return h;
}
u32
fnv1ai(u32 hash, int i) {
return fnv1a(hash, &i, sizeof i);
}
u32
fnv1aI(u32 hash, i64 i) {
return fnv1a(hash, &i, sizeof i);
}
u32
fnv1az(u32 hash, size_t i) {
return fnv1a(hash, &i, sizeof i);
}
static const char *filepaths[100];
static const char *filemmaps[100];
static int nfilepaths = 0;
int addfilepath(const char *s) {
for (int i = 0; i < nfilepaths; ++i)
if (!strcmp(filepaths[i], s))
return i;
assert(nfilepaths < sizeof filepaths);
filepaths[nfilepaths] = s;
return nfilepaths++;
}
const char *fileid2path(int id) {
assert(id < nfilepaths);
return filepaths[id];
}
void *
xmalloc(size_t n) {
void *p = malloc(n);
assert(p && "malloc");
return p;
}
void *
xcalloc(size_t n, size_t m) {
void *p = calloc(n,m);
assert(p && "calloc");
return p;
}
void *
xrealloc(void *p, size_t n) {
if (!p)
return xmalloc(n);
if (!n)
return free(p), NULL;
p = realloc(p, n);
assert(p && "realloc");
return p;
}
char *
xasprintf(const char *fmt, ...) {
va_list ap, aq;
int n = 32, m;
char *str = xcalloc(n, 1);
va_start(ap, fmt);
m = vsnprintf(str, n, fmt, ap) + 1;
str = xrealloc(str, m);
if (m > n) {
va_copy(aq, ap);
vsprintf(str, fmt, aq);
va_end(aq);
}
va_end(ap);
assert(str);
return str;
}
char *
xstrdup(const char *s) {
return strcpy(xmalloc(strlen(s) + 1), s);
}
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <unistd.h>
static void
eprifileline(struct span span) {
const char *src = filemmaps[span.fileid];
long i, j, n;
if (!src) {
const char *path = fileid2path(span.fileid);
struct stat st;
int fd = open(path, O_RDONLY);
if (fd < -1) {
perror("open()");
return;
}
if (stat(path, &st) < 0) {
perror("stat()");
close(fd);
return;
}
filemmaps[span.fileid] = src = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
assert(src && src != (void *)-1 && "mmap");
close(fd);
}
// line begin
for (i = span.idx; i > 0 && src[i] != '\n'; --i) ;
if (i > 0) ++i;
// line end
for (j = span.idx; src[j] && src[j] != '\n'; ++j) ;
--j;
n = fprintf(stderr, "%4d | ", span.line);
for (long k = i; k <= j; ++k)
epri("%c", src[k]);
epri("\n");
while (n--)
epri(" ");
for (long k = i, j = 0; src[k] && src[k] != '\n'; ++k, ++j)
fprintf(stderr, "%s", j + 1 == span.col ? "^" : " ");
epri("\n");
}
void noreturn
fatal(struct parser *P, struct span span, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int i = 0;
epri("%s:%d:%d: error: ", fileid2path(span.fileid), span.line, span.col);
vepri(fmt, ap);
epri("\n");
eprifileline(span);
for (struct expan *ep = P->curexpan; ep; ep = ep->prev, ++i) {
if (ep->name && (i < 8 || !ep->prev || !ep->prev->prev)) {
span = ep->span;
epri("* while expanding %s `%s' at %s:%d:%d\n",
ep->tepl ? "template" : "macro", ep->name,
fileid2path(ep->span.fileid), span.line, span.col);
eprifileline(span);
} else if (ep->name && i == 10) {
epri(" ... (some expansions omitted)\n");
}
}
va_end(ap);
exit(127);
}
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