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| author | Freya Murphy <freya@freyacat.org> | 2025-04-08 10:39:48 -0400 |
|---|---|---|
| committer | Freya Murphy <freya@freyacat.org> | 2025-04-08 10:39:48 -0400 |
| commit | 8a19547957a86bed3f58c9abc1ac218d04698faf (patch) | |
| tree | ed7ccc6f3a8902915dfe6c9bf763fc45d752b3c4 /kernel/lib/atox.c | |
| parent | fmt (diff) | |
| download | comus-8a19547957a86bed3f58c9abc1ac218d04698faf.tar.gz comus-8a19547957a86bed3f58c9abc1ac218d04698faf.tar.bz2 comus-8a19547957a86bed3f58c9abc1ac218d04698faf.zip | |
break apart c libaray
Diffstat (limited to 'kernel/lib/atox.c')
| -rw-r--r-- | kernel/lib/atox.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/kernel/lib/atox.c b/kernel/lib/atox.c new file mode 100644 index 0000000..6d3d4cc --- /dev/null +++ b/kernel/lib/atox.c @@ -0,0 +1,29 @@ +#include <lib.h> + +#define ATOX(name, type) \ + type name(const char *s) \ + { \ + for (; isspace(*s); s++) \ + ; \ + int neg = 0; \ + switch (*s) { \ + case '-': \ + neg = 1; \ + /* fallthrough */ \ + case '+': \ + s++; \ + break; \ + } \ + type num = 0; \ + for (; *s == '0'; s++) \ + ; \ + for (; isdigit(*s); s++) { \ + num *= 10; \ + num += *s - '0'; \ + } \ + return num * (neg ? -1 : 1); \ + } + +ATOX(atoi, int) +ATOX(atol, long int) +ATOX(atoll, long long int) |