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| author | Freya Murphy <freya@freyacat.org> | 2025-04-03 12:30:34 -0400 |
|---|---|---|
| committer | Freya Murphy <freya@freyacat.org> | 2025-04-03 12:30:34 -0400 |
| commit | ec3c37d1d40d7b288584c234f4c3e7a600f2353d (patch) | |
| tree | bb587b33c4c793ff7a3317dfa958d69b0fa318a1 /lib/atox.c | |
| parent | move boot only headers to boot (diff) | |
| download | comus-ec3c37d1d40d7b288584c234f4c3e7a600f2353d.tar.gz comus-ec3c37d1d40d7b288584c234f4c3e7a600f2353d.tar.bz2 comus-ec3c37d1d40d7b288584c234f4c3e7a600f2353d.zip | |
new libs
Diffstat (limited to 'lib/atox.c')
| -rw-r--r-- | lib/atox.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/atox.c b/lib/atox.c new file mode 100644 index 0000000..c4bef59 --- /dev/null +++ b/lib/atox.c @@ -0,0 +1,30 @@ +#include <stdlib.h> +#include <ctype.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) |