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/* gbos libc C helpers (compiled once, linked into every program). */
#include "gbos.h"
/* sleep for approximately 'ms' milliseconds (cooperative; other procs run).
The kernel counts in 1/64-second units (~15.6 ms), so we round ms to that. */
void msleep(unsigned int ms) {
unsigned int u = ms >> 4; /* ~ms/15.6, close enough for a delay */
if (u > 255) u = 255;
if (u == 0 && ms) u = 1;
gsleep((unsigned char)u);
}
/* print an unsigned int in decimal */
void putu(unsigned int n) {
char buf[5];
unsigned char i = 0;
if (n == 0) { putc('0'); return; }
while (n) { buf[i++] = '0' + (n % 10); n = n / 10; }
while (i) putc(buf[--i]);
}
/* parse a decimal number (stops at the first non-digit) */
unsigned char atou(const char *s) {
unsigned char n = 0;
while (*s >= '0' && *s <= '9') { n = n * 10 + (*s - '0'); s++; }
return n;
}
/* tokenize the argument string in place into argv[]; returns argc.
(replaces the spaces in the arg string with NULs) */
unsigned char argv_parse(char **argv, unsigned char maxv) {
char *p = getargs();
unsigned char argc = 0;
for (;;) {
while (*p == ' ') p++;
if (*p == 0) break;
if (argc < maxv) argv[argc] = p;
argc++;
while (*p != 0 && *p != ' ') p++;
if (*p == ' ') *p++ = 0;
}
return argc;
}
/* return nonzero if single-char flag `f` appears (as -f or within -abc) */
unsigned char hasflag(char **argv, unsigned char argc, char f) {
unsigned char i, j;
for (i = 0; i < argc; i++) {
if (argv[i][0] != '-') continue;
for (j = 1; argv[i][j]; j++)
if (argv[i][j] == f) return 1;
}
return 0;
}
/* return the value for option -<opt> ("-n 5" or "-n5"), or 0 if absent */
char *optval(char **argv, unsigned char argc, char opt) {
unsigned char i;
for (i = 0; i < argc; i++) {
if (argv[i][0] == '-' && argv[i][1] == opt) {
if (argv[i][2]) return &argv[i][2];
if (i + 1 < argc) return argv[i+1];
return 0;
}
}
return 0;
}
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