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#include <assert.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
#include "system.h"
#include "utils.h"
void __strbuild(char *buf, int size,
const char *file, int line,
const char *fmt, ...)
{
va_list ap;
int len;
va_start(ap, fmt);
len = vsnprintf(NULL, 0, fmt, ap);
va_end(ap);
if (len < 0) {
fprintf(stderr, "%s:%d: ", file, line);
perror("");
exit(EXIT_FAILURE);
}
if (len >= size) {
fprintf(stderr, "%s:%d: error: not enough space, "
"have %d, need at least %d\n",
file, line,
size, len + 1);
exit(EXIT_FAILURE);
}
va_start(ap, fmt);
len = vsnprintf(buf, size, fmt, ap);
va_end(ap);
assert(len >= 0);
}
int str_has_suffix(const char *str, const char *suffix)
{
int str_len = strlen(str);
int suffix_len = strlen(suffix);
return ((str_len > suffix_len)
&& (strcmp(str + str_len - suffix_len, suffix) == 0));
}
void assert_db_exists(void)
{
if (file_exists(DATABASE_PATH))
return;
if (errno == ENOENT) {
fprintf(stderr,
"ftag: database not found at \"%s\", "
"have you run \"ftag init\"?\n",
DATABASE_PATH);
}
else {
perror(DATABASE_PATH);
}
exit(EXIT_FAILURE);
}
uint32_t sum(const char *file)
{
FILE *stream = fopen(file, "r");
uint8_t buf[4096];
size_t buf_len;
uint32_t sum = 5381;
if (!file) {
fprintf(stderr, "fopen: \"%s\": ", file);
perror("");
exit(EXIT_FAILURE);
}
while ((buf_len = fread(&buf, 1, sizeof(buf), stream)) != 0) {
for (int i = 0; i < buf_len; i++) {
uint8_t next = buf[i];
sum = sum*33 + next;
}
}
if (ferror(stream)) {
fprintf(stderr, "fread: \"%s\": ", file);
perror("");
exit(EXIT_FAILURE);
}
fclose(stream);
return sum;
}
time_t time_from_str(const char *str)
{
int rc;
struct tm tm;
memset(&tm, 0, sizeof(tm));
rc = sscanf(str, "%d-%d-%d", &tm.tm_year, &tm.tm_mon, &tm.tm_mday);
if (rc <= 0) {
perror("sscanf");
exit(EXIT_FAILURE);
}
tm.tm_year -= 1900;
tm.tm_mon -= 1;
return mktime(&tm);
}
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