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-rw-r--r--gnu/usr.bin/perl/x2p/str.c468
1 files changed, 468 insertions, 0 deletions
diff --git a/gnu/usr.bin/perl/x2p/str.c b/gnu/usr.bin/perl/x2p/str.c
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index 00000000000..e9dd34400f0
--- /dev/null
+++ b/gnu/usr.bin/perl/x2p/str.c
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+/* $RCSfile: str.c,v $$Revision: 4.1 $$Date: 92/08/07 18:29:26 $
+ *
+ * Copyright (c) 1991, Larry Wall
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Artistic License, as specified in the README file.
+ *
+ * $Log: str.c,v $
+ */
+
+#include "EXTERN.h"
+#include "a2p.h"
+#include "util.h"
+
+void
+str_numset(str,num)
+register STR *str;
+double num;
+{
+ str->str_nval = num;
+ str->str_pok = 0; /* invalidate pointer */
+ str->str_nok = 1; /* validate number */
+}
+
+char *
+str_2ptr(str)
+register STR *str;
+{
+ register char *s;
+
+ if (!str)
+ return "";
+ GROWSTR(&(str->str_ptr), &(str->str_len), 24);
+ s = str->str_ptr;
+ if (str->str_nok) {
+ sprintf(s,"%.20g",str->str_nval);
+ while (*s) s++;
+ }
+ *s = '\0';
+ str->str_cur = s - str->str_ptr;
+ str->str_pok = 1;
+#ifdef DEBUGGING
+ if (debug & 32)
+ fprintf(stderr,"0x%lx ptr(%s)\n",str,str->str_ptr);
+#endif
+ return str->str_ptr;
+}
+
+double
+str_2num(str)
+register STR *str;
+{
+ if (!str)
+ return 0.0;
+ if (str->str_len && str->str_pok)
+ str->str_nval = atof(str->str_ptr);
+ else
+ str->str_nval = 0.0;
+ str->str_nok = 1;
+#ifdef DEBUGGING
+ if (debug & 32)
+ fprintf(stderr,"0x%lx num(%g)\n",str,str->str_nval);
+#endif
+ return str->str_nval;
+}
+
+void
+str_sset(dstr,sstr)
+STR *dstr;
+register STR *sstr;
+{
+ if (!sstr)
+ str_nset(dstr,No,0);
+ else if (sstr->str_nok)
+ str_numset(dstr,sstr->str_nval);
+ else if (sstr->str_pok)
+ str_nset(dstr,sstr->str_ptr,sstr->str_cur);
+ else
+ str_nset(dstr,"",0);
+}
+
+void
+str_nset(str,ptr,len)
+register STR *str;
+register char *ptr;
+register int len;
+{
+ GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
+ bcopy(ptr,str->str_ptr,len);
+ str->str_cur = len;
+ *(str->str_ptr+str->str_cur) = '\0';
+ str->str_nok = 0; /* invalidate number */
+ str->str_pok = 1; /* validate pointer */
+}
+
+void
+str_set(str,ptr)
+register STR *str;
+register char *ptr;
+{
+ register int len;
+
+ if (!ptr)
+ ptr = "";
+ len = strlen(ptr);
+ GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
+ bcopy(ptr,str->str_ptr,len+1);
+ str->str_cur = len;
+ str->str_nok = 0; /* invalidate number */
+ str->str_pok = 1; /* validate pointer */
+}
+
+void
+str_chop(str,ptr) /* like set but assuming ptr is in str */
+register STR *str;
+register char *ptr;
+{
+ if (!(str->str_pok))
+ str_2ptr(str);
+ str->str_cur -= (ptr - str->str_ptr);
+ bcopy(ptr,str->str_ptr, str->str_cur + 1);
+ str->str_nok = 0; /* invalidate number */
+ str->str_pok = 1; /* validate pointer */
+}
+
+void
+str_ncat(str,ptr,len)
+register STR *str;
+register char *ptr;
+register int len;
+{
+ if (!(str->str_pok))
+ str_2ptr(str);
+ GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
+ bcopy(ptr,str->str_ptr+str->str_cur,len);
+ str->str_cur += len;
+ *(str->str_ptr+str->str_cur) = '\0';
+ str->str_nok = 0; /* invalidate number */
+ str->str_pok = 1; /* validate pointer */
+}
+
+void
+str_scat(dstr,sstr)
+STR *dstr;
+register STR *sstr;
+{
+ if (!(sstr->str_pok))
+ str_2ptr(sstr);
+ if (sstr)
+ str_ncat(dstr,sstr->str_ptr,sstr->str_cur);
+}
+
+void
+str_cat(str,ptr)
+register STR *str;
+register char *ptr;
+{
+ register int len;
+
+ if (!ptr)
+ return;
+ if (!(str->str_pok))
+ str_2ptr(str);
+ len = strlen(ptr);
+ GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
+ bcopy(ptr,str->str_ptr+str->str_cur,len+1);
+ str->str_cur += len;
+ str->str_nok = 0; /* invalidate number */
+ str->str_pok = 1; /* validate pointer */
+}
+
+char *
+str_append_till(str,from,delim,keeplist)
+register STR *str;
+register char *from;
+register int delim;
+char *keeplist;
+{
+ register char *to;
+ register int len;
+
+ if (!from)
+ return Nullch;
+ len = strlen(from);
+ GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
+ str->str_nok = 0; /* invalidate number */
+ str->str_pok = 1; /* validate pointer */
+ to = str->str_ptr+str->str_cur;
+ for (; *from; from++,to++) {
+ if (*from == '\\' && from[1] && delim != '\\') {
+ if (!keeplist) {
+ if (from[1] == delim || from[1] == '\\')
+ from++;
+ else
+ *to++ = *from++;
+ }
+ else if (strchr(keeplist,from[1]))
+ *to++ = *from++;
+ else
+ from++;
+ }
+ else if (*from == delim)
+ break;
+ *to = *from;
+ }
+ *to = '\0';
+ str->str_cur = to - str->str_ptr;
+ return from;
+}
+
+STR *
+str_new(len)
+int len;
+{
+ register STR *str;
+
+ if (freestrroot) {
+ str = freestrroot;
+ freestrroot = str->str_link.str_next;
+ }
+ else {
+ str = (STR *) safemalloc(sizeof(STR));
+ bzero((char*)str,sizeof(STR));
+ }
+ if (len)
+ GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
+ return str;
+}
+
+void
+str_grow(str,len)
+register STR *str;
+int len;
+{
+ if (len && str)
+ GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
+}
+
+/* make str point to what nstr did */
+
+void
+str_replace(str,nstr)
+register STR *str;
+register STR *nstr;
+{
+ Safefree(str->str_ptr);
+ str->str_ptr = nstr->str_ptr;
+ str->str_len = nstr->str_len;
+ str->str_cur = nstr->str_cur;
+ str->str_pok = nstr->str_pok;
+ if (str->str_nok = nstr->str_nok)
+ str->str_nval = nstr->str_nval;
+ safefree((char*)nstr);
+}
+
+void
+str_free(str)
+register STR *str;
+{
+ if (!str)
+ return;
+ if (str->str_len)
+ str->str_ptr[0] = '\0';
+ str->str_cur = 0;
+ str->str_nok = 0;
+ str->str_pok = 0;
+ str->str_link.str_next = freestrroot;
+ freestrroot = str;
+}
+
+int
+str_len(str)
+register STR *str;
+{
+ if (!str)
+ return 0;
+ if (!(str->str_pok))
+ str_2ptr(str);
+ if (str->str_len)
+ return str->str_cur;
+ else
+ return 0;
+}
+
+char *
+str_gets(str,fp)
+register STR *str;
+register FILE *fp;
+{
+#if defined(USE_STDIO_PTR) && defined(STDIO_PTR_LVALUE) && defined(STDIO_CNT_LVALUE)
+ /* Here is some breathtakingly efficient cheating */
+
+ register char *bp; /* we're going to steal some values */
+ register int cnt; /* from the stdio struct and put EVERYTHING */
+ register STDCHAR *ptr; /* in the innermost loop into registers */
+ register char newline = '\n'; /* (assuming at least 6 registers) */
+ int i;
+ int bpx;
+
+ cnt = FILE_cnt(fp); /* get count into register */
+ str->str_nok = 0; /* invalidate number */
+ str->str_pok = 1; /* validate pointer */
+ if (str->str_len <= cnt) /* make sure we have the room */
+ GROWSTR(&(str->str_ptr), &(str->str_len), cnt+1);
+ bp = str->str_ptr; /* move these two too to registers */
+ ptr = FILE_ptr(fp);
+ for (;;) {
+ while (--cnt >= 0) {
+ if ((*bp++ = *ptr++) == newline)
+ if (bp <= str->str_ptr || bp[-2] != '\\')
+ goto thats_all_folks;
+ else {
+ line++;
+ bp -= 2;
+ }
+ }
+
+ FILE_cnt(fp) = cnt; /* deregisterize cnt and ptr */
+ FILE_ptr(fp) = ptr;
+ i = _filbuf(fp); /* get more characters */
+ cnt = FILE_cnt(fp);
+ ptr = FILE_ptr(fp); /* reregisterize cnt and ptr */
+
+ bpx = bp - str->str_ptr; /* prepare for possible relocation */
+ GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + cnt + 1);
+ bp = str->str_ptr + bpx; /* reconstitute our pointer */
+
+ if (i == newline) { /* all done for now? */
+ *bp++ = i;
+ goto thats_all_folks;
+ }
+ else if (i == EOF) /* all done for ever? */
+ goto thats_all_folks;
+ *bp++ = i; /* now go back to screaming loop */
+ }
+
+thats_all_folks:
+ FILE_cnt(fp) = cnt; /* put these back or we're in trouble */
+ FILE_ptr(fp) = ptr;
+ *bp = '\0';
+ str->str_cur = bp - str->str_ptr; /* set length */
+
+#else /* USE_STDIO_PTR && STDIO_PTR_LVALUE && STDIO_CNT_LVALUE */
+ /* The big, slow, and stupid way */
+
+ static char buf[4192];
+
+ if (fgets(buf, sizeof buf, fp) != Nullch)
+ str_set(str, buf);
+ else
+ str_set(str, No);
+
+#endif /* USE_STDIO_PTR && STDIO_PTR_LVALUE && STDIO_CNT_LVALUE */
+
+ return str->str_cur ? str->str_ptr : Nullch;
+}
+
+void
+str_inc(str)
+register STR *str;
+{
+ register char *d;
+
+ if (!str)
+ return;
+ if (str->str_nok) {
+ str->str_nval += 1.0;
+ str->str_pok = 0;
+ return;
+ }
+ if (!str->str_pok) {
+ str->str_nval = 1.0;
+ str->str_nok = 1;
+ return;
+ }
+ for (d = str->str_ptr; *d && *d != '.'; d++) ;
+ d--;
+ if (!isdigit(*str->str_ptr) || !isdigit(*d) ) {
+ str_numset(str,atof(str->str_ptr) + 1.0); /* punt */
+ return;
+ }
+ while (d >= str->str_ptr) {
+ if (++*d <= '9')
+ return;
+ *(d--) = '0';
+ }
+ /* oh,oh, the number grew */
+ GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + 2);
+ str->str_cur++;
+ for (d = str->str_ptr + str->str_cur; d > str->str_ptr; d--)
+ *d = d[-1];
+ *d = '1';
+}
+
+void
+str_dec(str)
+register STR *str;
+{
+ register char *d;
+
+ if (!str)
+ return;
+ if (str->str_nok) {
+ str->str_nval -= 1.0;
+ str->str_pok = 0;
+ return;
+ }
+ if (!str->str_pok) {
+ str->str_nval = -1.0;
+ str->str_nok = 1;
+ return;
+ }
+ for (d = str->str_ptr; *d && *d != '.'; d++) ;
+ d--;
+ if (!isdigit(*str->str_ptr) || !isdigit(*d) || (*d == '0' && d == str->str_ptr)) {
+ str_numset(str,atof(str->str_ptr) - 1.0); /* punt */
+ return;
+ }
+ while (d >= str->str_ptr) {
+ if (--*d >= '0')
+ return;
+ *(d--) = '9';
+ }
+}
+
+/* make a string that will exist for the duration of the expression eval */
+
+STR *
+str_mortal(oldstr)
+STR *oldstr;
+{
+ register STR *str = str_new(0);
+ static long tmps_size = -1;
+
+ str_sset(str,oldstr);
+ if (++tmps_max > tmps_size) {
+ tmps_size = tmps_max;
+ if (!(tmps_size & 127)) {
+ if (tmps_size)
+ tmps_list = (STR**)saferealloc((char*)tmps_list,
+ (tmps_size + 128) * sizeof(STR*) );
+ else
+ tmps_list = (STR**)safemalloc(128 * sizeof(char*));
+ }
+ }
+ tmps_list[tmps_max] = str;
+ return str;
+}
+
+STR *
+str_make(s)
+char *s;
+{
+ register STR *str = str_new(0);
+
+ str_set(str,s);
+ return str;
+}
+
+STR *
+str_nmake(n)
+double n;
+{
+ register STR *str = str_new(0);
+
+ str_numset(str,n);
+ return str;
+}
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