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36 RCSID("$Id: parse_units.c 21005 2007-06-08 01:54:35Z lha $");
43 #include "parse_units.h"
46 * Parse string in `s' according to `units' and return value.
47 * def_unit defines the default unit.
51 parse_something (const char *s, const struct units *units,
53 int (*func)(int res, int val, unsigned mult),
59 unsigned def_mult = 1;
61 if (def_unit != NULL) {
62 const struct units *u;
64 for (u = units; u->name; ++u) {
65 if (strcasecmp (u->name, def_unit) == 0) {
78 const struct units *u, *partial_unit;
83 while(isspace((unsigned char)*p) || *p == ',')
86 val = strtod (p, &next); /* strtol(p, &next, 0); */
94 while (isspace((unsigned char)*p))
97 res = (*func)(res, val, def_mult);
101 } else if (*p == '+') {
104 } else if (*p == '-') {
108 if (no_val_p && val == 0)
110 u_len = strcspn (p, ", \t");
113 if (u_len > 1 && p[u_len - 1] == 's')
115 for (u = units; u->name; ++u) {
116 if (strncasecmp (p, u->name, u_len) == 0) {
117 if (u_len == strlen (u->name)) {
119 res = (*func)(res, val, u->mult);
129 if (u->name == NULL) {
132 res = (*func)(res, val, partial_unit->mult);
146 * The string consists of a sequence of `n unit'
150 acc_units(int res, int val, unsigned mult)
152 return res + val * mult;
155 int ROKEN_LIB_FUNCTION
156 parse_units (const char *s, const struct units *units,
157 const char *def_unit)
159 return parse_something (s, units, def_unit, acc_units, 0, 0);
163 * The string consists of a sequence of `[+-]flag'. `orig' consists
164 * the original set of flags, those are then modified and returned as
165 * the function value.
169 acc_flags(int res, int val, unsigned mult)
181 int ROKEN_LIB_FUNCTION
182 parse_flags (const char *s, const struct units *units,
185 return parse_something (s, units, NULL, acc_flags, orig, 1);
189 * Return a string representation according to `units' of `num' in `s'
190 * with maximum length `len'. The actual length is the function value.
194 unparse_something (int num, const struct units *units, char *s, size_t len,
195 int (*print) (char *, size_t, int, const char *, int),
196 int (*update) (int, unsigned),
197 const char *zero_string)
199 const struct units *u;
203 return snprintf (s, len, "%s", zero_string);
205 for (u = units; num > 0 && u->name; ++u) {
208 divisor = num / u->mult;
210 num = (*update) (num, u->mult);
211 tmp = (*print) (s, len, divisor, u->name, num);
228 print_unit (char *s, size_t len, int divisor, const char *name, int rem)
230 return snprintf (s, len, "%u %s%s%s",
232 divisor == 1 ? "" : "s",
237 update_unit (int in, unsigned mult)
243 update_unit_approx (int in, unsigned mult)
248 return update_unit (in, mult);
251 int ROKEN_LIB_FUNCTION
252 unparse_units (int num, const struct units *units, char *s, size_t len)
254 return unparse_something (num, units, s, len,
260 int ROKEN_LIB_FUNCTION
261 unparse_units_approx (int num, const struct units *units, char *s, size_t len)
263 return unparse_something (num, units, s, len,
269 void ROKEN_LIB_FUNCTION
270 print_units_table (const struct units *units, FILE *f)
272 const struct units *u, *u2;
275 for (u = units; u->name; ++u) {
276 max_sz = max(max_sz, strlen(u->name));
279 for (u = units; u->name;) {
281 const struct units *next;
283 for (next = u + 1; next->name && next->mult == u->mult; ++next)
288 u2->name && u->mult % u2->mult != 0;
291 if (u2->name == NULL)
293 unparse_units (u->mult, u2, buf, sizeof(buf));
294 fprintf (f, "1 %*s = %s\n", max_sz, u->name, buf);
296 fprintf (f, "1 %s\n", u->name);
303 print_flag (char *s, size_t len, int divisor, const char *name, int rem)
305 return snprintf (s, len, "%s%s", name, rem > 0 ? ", " : "");
309 update_flag (int in, unsigned mult)
314 int ROKEN_LIB_FUNCTION
315 unparse_flags (int num, const struct units *units, char *s, size_t len)
317 return unparse_something (num, units, s, len,
323 void ROKEN_LIB_FUNCTION
324 print_flags_table (const struct units *units, FILE *f)
326 const struct units *u;
328 for(u = units; u->name; ++u)
329 fprintf(f, "%s%s", u->name, (u+1)->name ? ", " : "\n");