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Introduce common strcasecmp and strncasecmp implementations (#23840)
This commit is contained in:
Bryson Miller
GitHub
parent
bc377183ce
commit
08d534e8d8
5 changed files with 64 additions and 37 deletions
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@ -6,6 +6,12 @@ comptime {
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@export(&strcmp, .{ .name = "strcmp", .linkage = common.linkage, .visibility = common.visibility });
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@export(&strlen, .{ .name = "strlen", .linkage = common.linkage, .visibility = common.visibility });
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@export(&strncmp, .{ .name = "strncmp", .linkage = common.linkage, .visibility = common.visibility });
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@export(&strcasecmp, .{ .name = "strcasecmp", .linkage = common.linkage, .visibility = common.visibility });
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@export(&strncasecmp, .{ .name = "strncasecmp", .linkage = common.linkage, .visibility = common.visibility });
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@export(&__strcasecmp_l, .{ .name = "__strcasecmp_l", .linkage = common.linkage, .visibility = common.visibility });
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@export(&__strncasecmp_l, .{ .name = "__strncasecmp_l", .linkage = common.linkage, .visibility = common.visibility });
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@export(&__strcasecmp_l, .{ .name = "strcasecmp_l", .linkage = .weak, .visibility = common.visibility });
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@export(&__strncasecmp_l, .{ .name = "strncasecmp_l", .linkage = .weak, .visibility = common.visibility });
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}
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fn strcmp(s1: [*:0]const c_char, s2: [*:0]const c_char) callconv(.c) c_int {
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@ -33,6 +39,64 @@ fn strncmp(s1: [*:0]const c_char, s2: [*:0]const c_char, n: usize) callconv(.c)
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return @as(c_int, l[0]) - @as(c_int, r[0]);
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}
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fn strcasecmp(s1: [*:0]const c_char, s2: [*:0]const c_char) callconv(.c) c_int {
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const toLower = std.ascii.toLower;
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var l: [*:0]const u8 = @ptrCast(s1);
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var r: [*:0]const u8 = @ptrCast(s2);
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while (l[0] != 0 and r[0] != 0 and (l[0] == r[0] or toLower(l[0]) == toLower(r[0]))) {
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l += 1;
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r += 1;
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}
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return @as(c_int, toLower(l[0])) - @as(c_int, toLower(r[0]));
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}
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fn __strcasecmp_l(s1: [*:0]const c_char, s2: [*:0]const c_char, locale: *anyopaque) callconv(.c) c_int {
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_ = locale;
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return strcasecmp(s1, s2);
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}
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fn strncasecmp(s1: [*:0]const c_char, s2: [*:0]const c_char, n: usize) callconv(.c) c_int {
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const toLower = std.ascii.toLower;
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var l: [*:0]const u8 = @ptrCast(s1);
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var r: [*:0]const u8 = @ptrCast(s2);
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var i = n - 1;
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while (l[0] != 0 and r[0] != 0 and i != 0 and (l[0] == r[0] or toLower(l[0]) == toLower(r[0]))) {
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l += 1;
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r += 1;
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i -= 1;
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}
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return @as(c_int, toLower(l[0])) - @as(c_int, toLower(r[0]));
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}
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fn __strncasecmp_l(s1: [*:0]const c_char, s2: [*:0]const c_char, n: usize, locale: *anyopaque) callconv(.c) c_int {
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_ = locale;
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return strncasecmp(s1, s2, n);
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}
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test strcasecmp {
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try std.testing.expect(strcasecmp(@ptrCast("a"), @ptrCast("b")) < 0);
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try std.testing.expect(strcasecmp(@ptrCast("b"), @ptrCast("a")) > 0);
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try std.testing.expect(strcasecmp(@ptrCast("A"), @ptrCast("b")) < 0);
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try std.testing.expect(strcasecmp(@ptrCast("b"), @ptrCast("A")) > 0);
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try std.testing.expect(strcasecmp(@ptrCast("A"), @ptrCast("A")) == 0);
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try std.testing.expect(strcasecmp(@ptrCast("B"), @ptrCast("b")) == 0);
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try std.testing.expect(strcasecmp(@ptrCast("bb"), @ptrCast("AA")) > 0);
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}
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test strncasecmp {
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try std.testing.expect(strncasecmp(@ptrCast("a"), @ptrCast("b"), 1) < 0);
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try std.testing.expect(strncasecmp(@ptrCast("b"), @ptrCast("a"), 1) > 0);
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try std.testing.expect(strncasecmp(@ptrCast("A"), @ptrCast("b"), 1) < 0);
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try std.testing.expect(strncasecmp(@ptrCast("b"), @ptrCast("A"), 1) > 0);
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try std.testing.expect(strncasecmp(@ptrCast("A"), @ptrCast("A"), 1) == 0);
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try std.testing.expect(strncasecmp(@ptrCast("B"), @ptrCast("b"), 1) == 0);
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try std.testing.expect(strncasecmp(@ptrCast("bb"), @ptrCast("AA"), 2) > 0);
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}
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test strncmp {
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try std.testing.expect(strncmp(@ptrCast("a"), @ptrCast("b"), 1) < 0);
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try std.testing.expect(strncmp(@ptrCast("a"), @ptrCast("c"), 1) < 0);
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16
lib/libc/musl/src/string/strcasecmp.c
vendored
16
lib/libc/musl/src/string/strcasecmp.c
vendored
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@ -1,16 +0,0 @@
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#include <strings.h>
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#include <ctype.h>
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int strcasecmp(const char *_l, const char *_r)
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{
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const unsigned char *l=(void *)_l, *r=(void *)_r;
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for (; *l && *r && (*l == *r || tolower(*l) == tolower(*r)); l++, r++);
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return tolower(*l) - tolower(*r);
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}
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int __strcasecmp_l(const char *l, const char *r, locale_t loc)
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{
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return strcasecmp(l, r);
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}
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weak_alias(__strcasecmp_l, strcasecmp_l);
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17
lib/libc/musl/src/string/strncasecmp.c
vendored
17
lib/libc/musl/src/string/strncasecmp.c
vendored
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@ -1,17 +0,0 @@
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#include <strings.h>
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#include <ctype.h>
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int strncasecmp(const char *_l, const char *_r, size_t n)
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{
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const unsigned char *l=(void *)_l, *r=(void *)_r;
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if (!n--) return 0;
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for (; *l && *r && n && (*l == *r || tolower(*l) == tolower(*r)); l++, r++, n--);
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return tolower(*l) - tolower(*r);
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}
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int __strncasecmp_l(const char *l, const char *r, size_t n, locale_t loc)
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{
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return strncasecmp(l, r, n);
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}
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weak_alias(__strncasecmp_l, strncasecmp_l);
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@ -1853,7 +1853,6 @@ const src_files = [_][]const u8{
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"musl/src/string/rindex.c",
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"musl/src/string/stpcpy.c",
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"musl/src/string/stpncpy.c",
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"musl/src/string/strcasecmp.c",
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"musl/src/string/strcasestr.c",
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"musl/src/string/strcat.c",
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"musl/src/string/strchr.c",
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@ -1864,7 +1863,6 @@ const src_files = [_][]const u8{
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"musl/src/string/strerror_r.c",
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"musl/src/string/strlcat.c",
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"musl/src/string/strlcpy.c",
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"musl/src/string/strncasecmp.c",
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"musl/src/string/strncat.c",
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"musl/src/string/strncpy.c",
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"musl/src/string/strndup.c",
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@ -1055,7 +1055,6 @@ const libc_top_half_src_files = [_][]const u8{
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"musl/src/string/rindex.c",
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"musl/src/string/stpcpy.c",
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"musl/src/string/stpncpy.c",
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"musl/src/string/strcasecmp.c",
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"musl/src/string/strcasestr.c",
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"musl/src/string/strcat.c",
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"musl/src/string/strchr.c",
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@ -1066,7 +1065,6 @@ const libc_top_half_src_files = [_][]const u8{
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"musl/src/string/strerror_r.c",
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"musl/src/string/strlcat.c",
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"musl/src/string/strlcpy.c",
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"musl/src/string/strncasecmp.c",
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"musl/src/string/strncat.c",
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"musl/src/string/strncpy.c",
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"musl/src/string/strndup.c",
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