99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
/* $Revision: 1.9 $
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*/
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/* The implementation of the Scheme primitive `substitute'
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*/
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#include "unroff.h"
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Object p_substitute(int ac, Object *av) {
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Object str = *av;
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static Buffer *fp;
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char *p, *ep, *s, *t, *endp;
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int len;
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long a;
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char buf[30];
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char *fmt;
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time_t now;
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extern char *macros, *format, *directory;
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Check_Type(str, T_String);
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if (!fp)
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fp = buffer_new(0);
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buffer_clear(fp);
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for (p = STRING(str)->data, ep = p + STRING(str)->size; p < ep; p++) {
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if (*p == '%') {
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for (s = ++p; p < ep && *p != '%'; p++)
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;
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if (p == ep)
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Primitive_Error("missing `%' delimiter");
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len = p-s;
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t = safe_malloc(len+1); /* Make copy to add \0. C sucks... */
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memcpy(t, s, len);
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t[len] = 0;
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fmt = 0;
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if (len == 0)
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s = "%";
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else if (strcmp(t, "macros") == 0)
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s = macros;
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else if (strcmp(t, "format") == 0)
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s = format;
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else if (strcmp(t, "directory") == 0)
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s = directory;
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else if (strcmp(t, "progname") == 0)
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s = get_progname();
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else if (strcmp(t, "filepos") == 0) { /* ` file:lno' */
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if (istream_is_open()) {
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buffer_putc(fp, ' ');
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buffer_puts(fp, curr_istream_target(),
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strlen(curr_istream_target()));
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sprintf(buf, ":%lu:", curr_istream_lno());
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s = buf;
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} else s = "";
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} else if (strcmp(t, "tmpname") == 0) {
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s = tmpnam(0);
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} else if (strcmp(t, "version") == 0) {
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sprintf(buf, "%s", get_version_string());
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s = buf;
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} else if (strcmp(t, "weekday") == 0) {
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fmt = "%a";
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} else if (strcmp(t, "weekday+") == 0) {
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fmt = "%A";
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} else if (strcmp(t, "weekdaynum")== 0) {
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fmt = "%w";
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} else if (strcmp(t, "monthname") == 0) {
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fmt = "%b";
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} else if (strcmp(t, "monthname+") == 0) {
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fmt = "%B";
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} else if (strcmp(t, "day") == 0) {
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fmt = "%d";
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} else if (strcmp(t, "month") == 0) {
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fmt = "%m";
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} else if (strcmp(t, "year") == 0) {
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fmt = "%Y";
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} else if (strcmp(t, "date") == 0) {
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fmt = "%x";
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} else if (strcmp(t, "time") == 0) {
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fmt = "%X";
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} else if ((a = strtol(t, &endp, 10)), endp == t+len) {
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if (a < 1 || a > ac-1)
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Primitive_Error("no argument for %-specifier");
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Check_Type(av[a], T_String);
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buffer_puts(fp, STRING(av[a])->data, STRING(av[a])->size);
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s = "";
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} else if ((s = getenv(t)) == 0)
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s = "";
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if (fmt) {
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now = time(0);
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if (strftime(buf, sizeof buf, fmt, localtime(&now)) == 0)
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s = "";
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else s = buf;
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}
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free(t);
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buffer_puts(fp, s, strlen(s));
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} else
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buffer_putc(fp, *p);
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}
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return Make_String(fp->data, fp->size);
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}
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