/* $OpenBSD: str.c,v 1.22 2018/09/18 17:48:22 millert Exp $ */ /* $NetBSD: str.c,v 1.6 1995/03/21 09:03:24 cgd Exp $ */ /*- * Copyright (c) 1991, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #define MALLOC_INCR 128 /* * tc.str.c: Short string package * This has been a lesson of how to write buggy code! */ #include #include #include #include "csh.h" #include "extern.h" Char ** blk2short(char **src) { size_t n; Char **sdst, **dst; /* * Count */ for (n = 0; src[n] != NULL; n++) continue; sdst = dst = xreallocarray(NULL, n + 1, sizeof(Char *)); for (; *src != NULL; src++) *dst++ = SAVE(*src); *dst = NULL; return (sdst); } char ** short2blk(Char **src) { size_t n; char **sdst, **dst; /* * Count */ for (n = 0; src[n] != NULL; n++) continue; sdst = dst = xreallocarray(NULL, n + 1, sizeof(char *)); for (; *src != NULL; src++) *dst++ = xstrdup(short2str(*src)); *dst = NULL; return (sdst); } Char * str2short(char *src) { static Char *sdst; static size_t dstsize = 0; Char *dst, *edst; if (src == NULL) return (NULL); if (sdst == (NULL)) { dstsize = MALLOC_INCR; sdst = xreallocarray(NULL, dstsize, sizeof(Char)); } dst = sdst; edst = &dst[dstsize]; while (*src) { *dst++ = (Char) ((unsigned char) *src++); if (dst == edst) { dstsize += MALLOC_INCR; sdst = xreallocarray(sdst, dstsize, sizeof(Char)); edst = &sdst[dstsize]; dst = &edst[-MALLOC_INCR]; } } *dst = 0; return (sdst); } char * short2str(Char *src) { static char *sdst = NULL; static size_t dstsize = 0; char *dst, *edst; if (src == NULL) return (NULL); if (sdst == NULL) { dstsize = MALLOC_INCR; sdst = xreallocarray(NULL, dstsize, sizeof(char)); } dst = sdst; edst = &dst[dstsize]; while (*src) { *dst++ = (char) *src++; if (dst == edst) { dstsize += MALLOC_INCR; sdst = xreallocarray(sdst, dstsize, sizeof(char)); edst = &sdst[dstsize]; dst = &edst[-MALLOC_INCR]; } } *dst = 0; return (sdst); } size_t Strlcpy(Char *dst, const Char *src, size_t siz) { Char *d = dst; const Char *s = src; size_t n = siz; /* Copy as many bytes as will fit */ if (n != 0 && --n != 0) { do { if ((*d++ = *s++) == 0) break; } while (--n != 0); } /* Not enough room in dst, add NUL and traverse rest of src */ if (n == 0) { if (siz != 0) *d = '\0'; /* NUL-terminate dst */ while (*s++) ; } return(s - src - 1); /* count does not include NUL */ } size_t Strlcat(Char *dst, const Char *src, size_t siz) { Char *d = dst; const Char *s = src; size_t n = siz; size_t dlen; /* Find the end of dst and adjust bytes left but don't go past end */ while (n-- != 0 && *d != '\0') d++; dlen = d - dst; n = siz - dlen; if (n == 0) return(dlen + Strlen((Char *)s)); while (*s != '\0') { if (n != 1) { *d++ = *s; n--; } s++; } *d = '\0'; return(dlen + (s - src)); /* count does not include NUL */ } Char * Strchr(Char *str, int ch) { do if (*str == ch) return (str); while (*str++) ; return (NULL); } Char * Strrchr(Char *str, int ch) { Char *rstr; rstr = NULL; do if (*str == ch) rstr = str; while (*str++) ; return (rstr); } size_t Strlen(Char *str) { size_t n; for (n = 0; *str++; n++) continue; return (n); } int Strcmp(Char *str1, Char *str2) { for (; *str1 && *str1 == *str2; str1++, str2++) continue; /* * The following case analysis is necessary so that characters which look * negative collate low against normal characters but high against the * end-of-string NUL. */ if (*str1 == '\0' && *str2 == '\0') return (0); else if (*str1 == '\0') return (-1); else if (*str2 == '\0') return (1); else return (*str1 - *str2); } int Strncmp(Char *str1, Char *str2, size_t n) { if (n == 0) return (0); do { if (*str1 != *str2) { /* * The following case analysis is necessary so that characters * which look negative collate low against normal characters * but high against the end-of-string NUL. */ if (*str1 == '\0') return (-1); else if (*str2 == '\0') return (1); else return (*str1 - *str2); break; } if (*str1 == '\0') return(0); str1++, str2++; } while (--n != 0); return(0); } Char * Strsave(Char *s) { Char *n; Char *p; if (s == 0) s = STRNULL; for (p = s; *p++;) continue; n = p = xreallocarray(NULL, p - s, sizeof(Char)); while ((*p++ = *s++) != '\0') continue; return (n); } Char * Strspl(Char *cp, Char *dp) { Char *ep; Char *p, *q; if (!cp) cp = STRNULL; if (!dp) dp = STRNULL; for (p = cp; *p++;) continue; for (q = dp; *q++;) continue; ep = xreallocarray(NULL, ((p - cp) + (q - dp) - 1), sizeof(Char)); for (p = ep, q = cp; (*p++ = *q++) != '\0';) continue; for (p--, q = dp; (*p++ = *q++) != '\0';) continue; return (ep); } Char * Strend(Char *cp) { if (!cp) return (cp); while (*cp) cp++; return (cp); } Char * Strstr(Char *s, Char *t) { do { Char *ss = s; Char *tt = t; do if (*tt == '\0') return (s); while (*ss++ == *tt++); } while (*s++ != '\0'); return (NULL); } char * short2qstr(Char *src) { static char *sdst = NULL; static size_t dstsize = 0; char *dst, *edst; if (src == NULL) return (NULL); if (sdst == NULL) { dstsize = MALLOC_INCR; sdst = xreallocarray(NULL, dstsize, sizeof(char)); } dst = sdst; edst = &dst[dstsize]; while (*src) { if (*src & QUOTE) { *dst++ = '\\'; if (dst == edst) { dstsize += MALLOC_INCR; sdst = xreallocarray(sdst, dstsize, sizeof(char)); edst = &sdst[dstsize]; dst = &edst[-MALLOC_INCR]; } } *dst++ = (char) *src++; if (dst == edst) { dstsize += MALLOC_INCR; sdst = xreallocarray(sdst, dstsize, sizeof(char)); edst = &sdst[dstsize]; dst = &edst[-MALLOC_INCR]; } } *dst = 0; return (sdst); } /* * XXX: Should we worry about QUOTE'd chars? */ char * vis_str(Char *cp) { static char *sdst = NULL; static size_t dstsize = 0; size_t n; Char *dp; if (cp == NULL) return (NULL); for (dp = cp; *dp++;) continue; n = ((dp - cp) << 2) + 1; /* 4 times + NUL */ if (dstsize < n) { sdst = xreallocarray(sdst, n, sizeof(char)); dstsize = n; } (void) strnvis(sdst, short2str(cp), dstsize, VIS_NOSLASH); return (sdst); }