Don't shadow standard headers

@italic on the AUR stated that bfs from the AUR fails to build on
Manjaro.  From the build log, it seems like <time.h> doesn't get
included properly.  I assume it's picking up ./time.h instead.

I couldn't reproduce the build issue in the default configuration, but
it does fail with EXTRA_CFLAGS="-I." which isn't good.  So rename
everything with an x prefix to stop clashing.

Link: https://aur.archlinux.org/packages/bfs#comment-856102
Link: https://paste.rs/eqR

1 files changed, 0 insertions, 323 deletions

diff --git a/time.c b/time.c
deleted file mode 100644
index c7331b5..0000000
--- a/time.c
+++ /dev/null
@@ -1,323 +0,0 @@
-/****************************************************************************
- * bfs                                                                      *
- * Copyright (C) 2020 Tavian Barnes <tavianator@tavianator.com>             *
- *                                                                          *
- * Permission to use, copy, modify, and/or distribute this software for any *
- * purpose with or without fee is hereby granted.                           *
- *                                                                          *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES *
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         *
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  *
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   *
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    *
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  *
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           *
- ****************************************************************************/
-
-#include "time.h"
-#include <errno.h>
-#include <limits.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <time.h>
-
-/** Whether tzset() has been called. */
-static bool tz_is_set = false;
-
-int xlocaltime(const time_t *timep, struct tm *result) {
-	// Should be called before localtime_r() according to POSIX.1-2004
-	if (!tz_is_set) {
-		tzset();
-		tz_is_set = true;
-	}
-
-	if (localtime_r(timep, result)) {
-		return 0;
-	} else {
-		return -1;
-	}
-}
-
-int xgmtime(const time_t *timep, struct tm *result) {
-	// Should be called before gmtime_r() according to POSIX.1-2004
-	if (!tz_is_set) {
-		tzset();
-		tz_is_set = true;
-	}
-
-	if (gmtime_r(timep, result)) {
-		return 0;
-	} else {
-		return -1;
-	}
-}
-
-int xmktime(struct tm *tm, time_t *timep) {
-	*timep = mktime(tm);
-
-	if (*timep == -1) {
-		int error = errno;
-
-		struct tm tmp;
-		if (xlocaltime(timep, &tmp) != 0) {
-			return -1;
-		}
-
-		if (tm->tm_year != tmp.tm_year || tm->tm_yday != tmp.tm_yday
-		    || tm->tm_hour != tmp.tm_hour || tm->tm_min != tmp.tm_min || tm->tm_sec != tmp.tm_sec) {
-			errno = error;
-			return -1;
-		}
-	}
-
-	return 0;
-}
-
-static int safe_add(int *value, int delta) {
-	if (*value >= 0) {
-		if (delta > INT_MAX - *value) {
-			return -1;
-		}
-	} else {
-		if (delta < INT_MIN - *value) {
-			return -1;
-		}
-	}
-
-	*value += delta;
-	return 0;
-}
-
-static int floor_div(int n, int d) {
-	int a = n < 0;
-	return (n + a)/d - a;
-}
-
-static int wrap(int *value, int max, int *next) {
-	int carry = floor_div(*value, max);
-	*value -= carry * max;
-	return safe_add(next, carry);
-}
-
-static int month_length(int year, int month) {
-	static const int month_lengths[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
-	int ret = month_lengths[month];
-	if (month == 1 && year%4 == 0 && (year%100 != 0 || (year + 300)%400 == 0)) {
-		++ret;
-	}
-	return ret;
-}
-
-int xtimegm(struct tm *tm, time_t *timep) {
-	tm->tm_isdst = 0;
-
-	if (wrap(&tm->tm_sec, 60, &tm->tm_min) != 0) {
-		goto overflow;
-	}
-	if (wrap(&tm->tm_min, 60, &tm->tm_hour) != 0) {
-		goto overflow;
-	}
-	if (wrap(&tm->tm_hour, 24, &tm->tm_mday) != 0) {
-		goto overflow;
-	}
-
-	// In order to wrap the days of the month, we first need to know what
-	// month it is
-	if (wrap(&tm->tm_mon, 12, &tm->tm_year) != 0) {
-		goto overflow;
-	}
-
-	if (tm->tm_mday < 1) {
-		do {
-			--tm->tm_mon;
-			if (wrap(&tm->tm_mon, 12, &tm->tm_year) != 0) {
-				goto overflow;
-			}
-
-			tm->tm_mday += month_length(tm->tm_year, tm->tm_mon);
-		} while (tm->tm_mday < 1);
-	} else {
-		while (true) {
-			int days = month_length(tm->tm_year, tm->tm_mon);
-			if (tm->tm_mday <= days) {
-				break;
-			}
-
-			tm->tm_mday -= days;
-			++tm->tm_mon;
-			if (wrap(&tm->tm_mon, 12, &tm->tm_year) != 0) {
-				goto overflow;
-			}
-		}
-	}
-
-	tm->tm_yday = 0;
-	for (int i = 0; i < tm->tm_mon; ++i) {
-		tm->tm_yday += month_length(tm->tm_year, i);
-	}
-	tm->tm_yday += tm->tm_mday - 1;
-
-	int leap_days;
-	// Compute floor((year - 69)/4) - floor((year - 1)/100) + floor((year + 299)/400) without overflows
-	if (tm->tm_year >= 0) {
-		leap_days = floor_div(tm->tm_year - 69, 4) - floor_div(tm->tm_year - 1, 100) + floor_div(tm->tm_year - 101, 400) + 1;
-	} else {
-		leap_days = floor_div(tm->tm_year + 3, 4) - floor_div(tm->tm_year + 99, 100) + floor_div(tm->tm_year + 299, 400) - 17;
-	}
-
-	long long epoch_days = 365LL*(tm->tm_year - 70) + leap_days + tm->tm_yday;
-	tm->tm_wday = (epoch_days + 4)%7;
-	if (tm->tm_wday < 0) {
-		tm->tm_wday += 7;
-	}
-
-	long long epoch_time = tm->tm_sec + 60*(tm->tm_min + 60*(tm->tm_hour + 24*epoch_days));
-	*timep = (time_t)epoch_time;
-	if ((long long)*timep != epoch_time) {
-		goto overflow;
-	}
-	return 0;
-
-overflow:
-	errno = EOVERFLOW;
-	return -1;
-}
-
-/** Parse some digits from a timestamp. */
-static int parse_timestamp_part(const char **str, size_t n, int *result) {
-	char buf[n + 1];
-	for (size_t i = 0; i < n; ++i, ++*str) {
-		char c = **str;
-		if (c < '0' || c > '9') {
-			return -1;
-		}
-		buf[i] = c;
-	}
-	buf[n] = '\0';
-
-	*result = atoi(buf);
-	return 0;
-}
-
-int parse_timestamp(const char *str, struct timespec *result) {
-	struct tm tm = {
-		.tm_isdst = -1,
-	};
-
-	int tz_hour = 0;
-	int tz_min = 0;
-	bool tz_negative = false;
-	bool local = true;
-
-	// YYYY
-	if (parse_timestamp_part(&str, 4, &tm.tm_year) != 0) {
-		goto invalid;
-	}
-	tm.tm_year -= 1900;
-
-	// MM
-	if (*str == '-') {
-		++str;
-	}
-	if (parse_timestamp_part(&str, 2, &tm.tm_mon) != 0) {
-		goto invalid;
-	}
-	tm.tm_mon -= 1;
-
-	// DD
-	if (*str == '-') {
-		++str;
-	}
-	if (parse_timestamp_part(&str, 2, &tm.tm_mday) != 0) {
-		goto invalid;
-	}
-
-	if (!*str) {
-		goto end;
-	} else if (*str == 'T') {
-		++str;
-	}
-
-	// hh
-	if (parse_timestamp_part(&str, 2, &tm.tm_hour) != 0) {
-		goto invalid;
-	}
-
-	// mm
-	if (!*str) {
-		goto end;
-	} else if (*str == ':') {
-		++str;
-	}
-	if (parse_timestamp_part(&str, 2, &tm.tm_min) != 0) {
-		goto invalid;
-	}
-
-	// ss
-	if (!*str) {
-		goto end;
-	} else if (*str == ':') {
-		++str;
-	}
-	if (parse_timestamp_part(&str, 2, &tm.tm_sec) != 0) {
-		goto invalid;
-	}
-
-	if (!*str) {
-		goto end;
-	} else if (*str == 'Z') {
-		local = false;
-		++str;
-	} else if (*str == '+' || *str == '-') {
-		local = false;
-		tz_negative = *str == '-';
-		++str;
-
-		// hh
-		if (parse_timestamp_part(&str, 2, &tz_hour) != 0) {
-			goto invalid;
-		}
-
-		// mm
-		if (!*str) {
-			goto end;
-		} else if (*str == ':') {
-			++str;
-		}
-		if (parse_timestamp_part(&str, 2, &tz_min) != 0) {
-			goto invalid;
-		}
-	} else {
-		goto invalid;
-	}
-
-	if (*str) {
-		goto invalid;
-	}
-
-end:
-	if (local) {
-		if (xmktime(&tm, &result->tv_sec) != 0) {
-			goto error;
-		}
-	} else {
-		if (xtimegm(&tm, &result->tv_sec) != 0) {
-			goto error;
-		}
-
-		int offset = 60*tz_hour + tz_min;
-		if (tz_negative) {
-			result->tv_sec -= offset;
-		} else {
-			result->tv_sec += offset;
-		}
-	}
-
-	result->tv_nsec = 0;
-	return 0;
-
-invalid:
-	errno = EINVAL;
-error:
-	return -1;
-}