mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-10 15:22:04 +00:00
[gamecode] Rework PR_Sprintf to use a state machine
This makes it much easier to extend. There are even stubs for variable field width and precision (not set yet).
This commit is contained in:
Bill Currie
parent
a7956c7311
commit
7f86fb5529
1 changed files with 302 additions and 207 deletions
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@ -808,236 +808,331 @@ free_fmt_item (prstr_resources_t *res, fmt_item_t *fi)
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res->free_fmt_items = fi;
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}
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typedef struct fmtstate_s {
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struct fmt_state_s;
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typedef void (*fmt_state_f) (struct fmt_state_s *);
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typedef struct fmt_state_s {
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fmt_state_f state;
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prstr_resources_t *res;
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progs_t *pr;
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pr_type_t **args;
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const char *c;
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const char *l;
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const char *msg;
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fmt_item_t *fmt_items;
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fmt_item_t **fi;
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int fmt_count;
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} fmt_state_t;
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static inline void
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fmt_append_item (fmt_state_t *state)
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{
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(*state->fi)->next = new_fmt_item (state->res);
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state->fi = &(*state->fi)->next;
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}
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#undef P_var
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#define P_var(p,n,t) (args[n]->t##_var)
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#define P_var(p,n,t) (state->args[n]->t##_var)
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#undef P_DOUBLE
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#define P_DOUBLE(p,n) (*(double *) (args[n]))
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#define P_DOUBLE(p,n) (*(double *) (state->args[n]))
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static void fmt_state_format (fmt_state_t *state);
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static void fmt_state_flags (fmt_state_t *state);
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static void fmt_state_var_field_width (fmt_state_t *state);
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static void fmt_state_field_width (fmt_state_t *state);
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static void fmt_state_precision (fmt_state_t *state);
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static void fmt_state_var_precision (fmt_state_t *state);
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static void fmt_state_fixed_precision (fmt_state_t *state);
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static void fmt_state_modifiers (fmt_state_t *state);
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static void fmt_state_conversion (fmt_state_t *state);
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static void
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fmt_state_flags (fmt_state_t *state)
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{
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state->c++; // skip over %
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while (1) {
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switch (*state->c) {
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case '0':
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(*state->fi)->flags |= FMT_ZEROPAD;
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break;
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case '#':
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(*state->fi)->flags |= FMT_ALTFORM;
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break;
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case ' ':
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(*state->fi)->flags |= FMT_ADDBLANK;
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break;
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case '-':
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(*state->fi)->flags |= FMT_LJUSTIFY;
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break;
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case '+':
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(*state->fi)->flags |= FMT_ADDSIGN;
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break;
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case '*':
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state->state = fmt_state_var_field_width;
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return;
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case '.':
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state->state = fmt_state_precision;
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return;
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case '1': case '2': case '3': case '4': case '5':
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case '6': case '7': case '8': case '9':
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state->state = fmt_state_field_width;
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return;
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default:
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state->state = fmt_state_modifiers;
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return;
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}
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state->c++;
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}
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}
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static void
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fmt_state_var_field_width (fmt_state_t *state)
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{
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// XXX record width
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if (*++state->c == '.') {
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state->state = fmt_state_precision;
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} else {
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state->state = fmt_state_modifiers;
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}
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}
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static void
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fmt_state_field_width (fmt_state_t *state)
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{
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while (isdigit ((byte )*state->c)) {
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(*state->fi)->minFieldWidth *= 10;
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(*state->fi)->minFieldWidth += *state->c++ - '0';
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}
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if (*state->c == '.') {
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state->state = fmt_state_precision;
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} else {
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state->state = fmt_state_modifiers;
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}
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}
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static void
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fmt_state_precision (fmt_state_t *state)
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{
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state->c++; // skip over .
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(*state->fi)->precision = 0;
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if (isdigit ((byte )*state->c)) {
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state->state = fmt_state_fixed_precision;
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} else if (*state->c == '*') {
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state->state = fmt_state_var_precision;
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} else {
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state->state = fmt_state_modifiers;
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}
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}
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static void
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fmt_state_var_precision (fmt_state_t *state)
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{
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// XXX record precision
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state->state = fmt_state_modifiers;
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}
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static void
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fmt_state_fixed_precision (fmt_state_t *state)
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{
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while (isdigit ((byte )*state->c)) {
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(*state->fi)->precision *= 10;
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(*state->fi)->precision += *state->c++ - '0';
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}
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state->state = fmt_state_modifiers;
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}
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static void
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fmt_state_modifiers (fmt_state_t *state)
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{
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// no modifiers supported
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state->state = fmt_state_conversion;
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}
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static void
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fmt_state_conversion (fmt_state_t *state)
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{
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progs_t *pr = state->pr;
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char conv;
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switch ((conv = *state->c++)) {
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case '@':
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// object
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state->fmt_count++;
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fmt_append_item (state);
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break;
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case 'e':
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// entity
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(*state->fi)->type = 'i';
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(*state->fi)->data.integer_var =
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P_EDICTNUM (pr, state->fmt_count);
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state->fmt_count++;
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fmt_append_item (state);
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break;
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case 'i':
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case 'd':
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case 'c':
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// integer
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(*state->fi)->type = conv;
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(*state->fi)->data.integer_var = P_INT (pr, state->fmt_count);
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state->fmt_count++;
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fmt_append_item (state);
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break;
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case 'f':
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// float or double
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case 'g':
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// float or double, no trailing zeroes, trim "."
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// if nothing after
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(*state->fi)->type = conv;
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if (pr->float_promoted) {
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(*state->fi)->flags |= FMT_LONG;
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(*state->fi)->data.double_var
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= P_DOUBLE (pr, state->fmt_count);
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} else {
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(*state->fi)->data.float_var
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= P_FLOAT (pr, state->fmt_count);
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}
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state->fmt_count++;
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fmt_append_item (state);
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break;
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case 'p':
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// pointer
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(*state->fi)->flags |= FMT_ALTFORM;
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(*state->fi)->type = 'x';
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(*state->fi)->data.uinteger_var = P_UINT (pr, state->fmt_count);
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state->fmt_count++;
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fmt_append_item (state);
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break;
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case 's':
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// string
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(*state->fi)->type = conv;
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(*state->fi)->data.string_var = P_GSTRING (pr, state->fmt_count);
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state->fmt_count++;
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fmt_append_item (state);
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break;
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case 'v':
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case 'q':
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// vector
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{
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int i, count = 3;
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int flags = (*state->fi)->flags;
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int precision = (*state->fi)->precision;
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unsigned minWidth = (*state->fi)->minFieldWidth;
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(*state->fi)->flags = 0;
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(*state->fi)->precision = -1;
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(*state->fi)->minFieldWidth = 0;
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if (conv == 'q')
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count = 4;
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for (i = 0; i < count; i++) {
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if (i == 0) {
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(*state->fi)->type = 's';
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(*state->fi)->data.string_var = "'";
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} else {
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(*state->fi)->type = 's';
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(*state->fi)->data.string_var = " ";
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}
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fmt_append_item (state);
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(*state->fi)->flags = flags;
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(*state->fi)->precision = precision;
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(*state->fi)->minFieldWidth = minWidth;
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(*state->fi)->type = 'g';
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(*state->fi)->data.float_var =
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P_VECTOR (pr, state->fmt_count)[i];
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fmt_append_item (state);
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}
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}
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(*state->fi)->type = 's';
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(*state->fi)->data.string_var = "'";
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state->fmt_count++;
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fmt_append_item (state);
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break;
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case '%':
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(*state->fi)->flags = 0;
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(*state->fi)->precision = 0;
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(*state->fi)->minFieldWidth = 0;
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(*state->fi)->type = 's';
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(*state->fi)->data.string_var = "%";
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fmt_append_item (state);
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break;
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case 'x':
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// integer, hex notation
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(*state->fi)->type = conv;
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(*state->fi)->data.uinteger_var = P_UINT (pr, state->fmt_count);
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state->fmt_count++;
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fmt_append_item (state);
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break;
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}
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state->state = fmt_state_format;
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}
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static void
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fmt_state_format (fmt_state_t *state)
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{
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const char *l = state->c;
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while (*state->c && *state->c != '%') {
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state->c++;
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}
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if (state->c != l) {
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// have some unformatted text to print
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(*state->fi)->precision = state->c - l;
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(*state->fi)->type = 's';
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(*state->fi)->data.string_var = l;
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if (*state->c) {
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fmt_append_item (state);
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}
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}
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if (*state->c) {
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state->state = fmt_state_flags;
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} else {
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state->state = 0; // finished
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}
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}
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VISIBLE void
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PR_Sprintf (progs_t *pr, dstring_t *result, const char *name,
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const char *format, int count, pr_type_t **args)
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{
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prstr_resources_t *res = pr->pr_string_resources;
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const char *msg = "";
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fmt_state_t state = { };
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state.pr = pr;
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state.res = res;
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state.args = args;
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state.fi = &state.fmt_items;
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*state.fi = new_fmt_item (res);
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state.c = format;
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state.state = fmt_state_format;
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if (!name)
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name = "PR_Sprintf";
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*state.fi = new_fmt_item (res);
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state.c = state.l = format;
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while (*state.c) {
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if (*state.c++ == '%') {
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if (state.c != state.l + 1) {
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// have some unformatted text to print
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(*state.fi)->precision = state.c - state.l - 1;
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(*state.fi)->type = 's';
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(*state.fi)->data.string_var = state.l;
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(*state.fi)->next = new_fmt_item (res);
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state.fi = &(*state.fi)->next;
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}
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if (*state.c == '%') {
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(*state.fi)->type = 's';
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(*state.fi)->data.string_var = "%";
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(*state.fi)->next = new_fmt_item (res);
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state.fi = &(*state.fi)->next;
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} else {
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do {
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switch (*state.c) {
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// format options
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case '\0':
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msg = "Unexpected end of format string";
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goto error;
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case '0':
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(*state.fi)->flags |= FMT_ZEROPAD;
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state.c++;
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continue;
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case '#':
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(*state.fi)->flags |= FMT_ALTFORM;
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state.c++;
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continue;
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case ' ':
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(*state.fi)->flags |= FMT_ADDBLANK;
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state.c++;
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continue;
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case '-':
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(*state.fi)->flags |= FMT_LJUSTIFY;
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state.c++;
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continue;
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case '+':
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(*state.fi)->flags |= FMT_ADDSIGN;
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state.c++;
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continue;
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case '.':
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(*state.fi)->precision = 0;
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state.c++;
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while (isdigit ((byte )*state.c)) {
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(*state.fi)->precision *= 10;
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(*state.fi)->precision += *state.c++ - '0';
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}
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continue;
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case '1': case '2': case '3': case '4': case '5':
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case '6': case '7': case '8': case '9':
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while (isdigit ((byte )*state.c)) {
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(*state.fi)->minFieldWidth *= 10;
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(*state.fi)->minFieldWidth += *state.c++ - '0';
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}
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continue;
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// format types
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case '@':
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// object
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state.fmt_count++;
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(*state.fi)->next = new_fmt_item (res);
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state.fi = &(*state.fi)->next;
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break;
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case 'e':
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// entity
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(*state.fi)->type = 'i';
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(*state.fi)->data.integer_var =
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P_EDICTNUM (pr, state.fmt_count);
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state.fmt_count++;
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(*state.fi)->next = new_fmt_item (res);
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state.fi = &(*state.fi)->next;
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break;
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case 'i':
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case 'd':
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case 'c':
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// integer
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(*state.fi)->type = *state.c;
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(*state.fi)->data.integer_var = P_INT (pr, state.fmt_count);
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state.fmt_count++;
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(*state.fi)->next = new_fmt_item (res);
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state.fi = &(*state.fi)->next;
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break;
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case 'f':
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// float or double
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case 'g':
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// float or double, no trailing zeroes, trim "."
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// if nothing after
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(*state.fi)->type = *state.c;
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if (pr->float_promoted) {
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(*state.fi)->flags |= FMT_LONG;
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(*state.fi)->data.double_var
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= P_DOUBLE (pr, state.fmt_count);
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} else {
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(*state.fi)->data.float_var
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= P_FLOAT (pr, state.fmt_count);
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}
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state.fmt_count++;
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(*state.fi)->next = new_fmt_item (res);
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state.fi = &(*state.fi)->next;
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break;
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case 'p':
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// pointer
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(*state.fi)->flags |= FMT_ALTFORM;
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(*state.fi)->type = 'x';
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(*state.fi)->data.uinteger_var = P_UINT (pr, state.fmt_count);
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state.fmt_count++;
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(*state.fi)->next = new_fmt_item (res);
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state.fi = &(*state.fi)->next;
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break;
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case 's':
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// string
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(*state.fi)->type = *state.c;
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(*state.fi)->data.string_var = P_GSTRING (pr, state.fmt_count);
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state.fmt_count++;
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(*state.fi)->next = new_fmt_item (res);
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state.fi = &(*state.fi)->next;
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break;
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case 'v':
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case 'q':
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// vector
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{
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int i, count = 3;
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int flags = (*state.fi)->flags;
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int precision = (*state.fi)->precision;
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unsigned minWidth = (*state.fi)->minFieldWidth;
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(*state.fi)->flags = 0;
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(*state.fi)->precision = -1;
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(*state.fi)->minFieldWidth = 0;
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if (*state.c == 'q')
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count = 4;
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for (i = 0; i < count; i++) {
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if (i == 0) {
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(*state.fi)->type = 's';
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(*state.fi)->data.string_var = "'";
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} else {
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(*state.fi)->type = 's';
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(*state.fi)->data.string_var = " ";
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}
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(*state.fi)->next = new_fmt_item (res);
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state.fi = &(*state.fi)->next;
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(*state.fi)->flags = flags;
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(*state.fi)->precision = precision;
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(*state.fi)->minFieldWidth = minWidth;
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(*state.fi)->type = 'g';
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(*state.fi)->data.float_var =
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P_VECTOR (pr, state.fmt_count)[i];
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(*state.fi)->next = new_fmt_item (res);
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state.fi = &(*state.fi)->next;
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}
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}
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(*state.fi)->type = 's';
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(*state.fi)->data.string_var = "'";
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state.fmt_count++;
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(*state.fi)->next = new_fmt_item (res);
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state.fi = &(*state.fi)->next;
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break;
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case 'x':
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// integer, hex notation
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(*state.fi)->type = *state.c;
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(*state.fi)->data.uinteger_var = P_UINT (pr, state.fmt_count);
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state.fmt_count++;
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(*state.fi)->next = new_fmt_item (res);
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||||
state.fi = &(*state.fi)->next;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
} while (1);
|
||||
}
|
||||
state.l = ++state.c;
|
||||
}
|
||||
}
|
||||
if (state.c != state.l) {
|
||||
// have some unformatted text to print
|
||||
(*state.fi)->precision = state.c - state.l;
|
||||
(*state.fi)->type = 's';
|
||||
(*state.fi)->data.string_var = state.l;
|
||||
|
||||
(*state.fi)->next = new_fmt_item (res);
|
||||
while (*state.c && state.state) {
|
||||
state.state (&state);
|
||||
}
|
||||
|
||||
if (state.fmt_count != count) {
|
||||
if (state.state) {
|
||||
state.msg = "Unexpected end of format string";
|
||||
} else if (state.fmt_count != count) {
|
||||
if (state.fmt_count > count)
|
||||
msg = "Not enough arguments for format string.";
|
||||
state.msg = "Not enough arguments for format string.";
|
||||
else
|
||||
msg = "Too many arguments for format string.";
|
||||
dsprintf (res->print_str, "%s: %d %d", msg, state.fmt_count, count);
|
||||
msg = res->print_str->str;
|
||||
state.msg = "Too many arguments for format string.";
|
||||
}
|
||||
if (state.msg) {
|
||||
dsprintf (res->print_str, "%s: %d %d", state.msg, state.fmt_count,
|
||||
count);
|
||||
state.msg = res->print_str->str;
|
||||
goto error;
|
||||
}
|
||||
|
||||
|
|
@ -1050,7 +1145,7 @@ PR_Sprintf (progs_t *pr, dstring_t *result, const char *name,
|
|||
}
|
||||
return;
|
||||
error:
|
||||
PR_RunError (pr, "%s: %s", name, msg);
|
||||
PR_RunError (pr, "%s: %s", name, state.msg);
|
||||
}
|
||||
|
||||
void
|
||||
|
|
|
|||
Loading…
Reference in a new issue