/* $NetBSD: strutil.c,v 1.1.1.3 2015/01/17 16:34:18 christos Exp $ */ /* * Copyright (c) 1997-2014 Erez Zadok * Copyright (c) 1990 Jan-Simon Pendry * Copyright (c) 1990 Imperial College of Science, Technology & Medicine * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Jan-Simon Pendry at Imperial College, London. * * 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. * * * File: am-utils/libamu/strutil.c * */ /* * String Utilities. */ #ifdef HAVE_CONFIG_H # include #endif /* HAVE_CONFIG_H */ #include #include char * strnsave(const char *str, int len) { char *sp = (char *) xmalloc(len + 1); memmove(sp, str, len); sp[len] = '\0'; return sp; } /* * Concatenate three strings and store the result in the buffer pointed to * by p, making p large enough to hold the strings */ char * str3cat(char *p, char *s1, char *s2, char *s3) { int l1 = strlen(s1); int l2 = strlen(s2); int l3 = strlen(s3); p = (char *) xrealloc(p, l1 + l2 + l3 + 1); memmove(p, s1, l1); memmove(p + l1, s2, l2); memmove(p + l1 + l2, s3, l3 + 1); return p; } /* * Split s using ch as delimiter and qc as quote character */ char ** strsplit(char *s, int ch, int qc) { char **ivec; int ic = 0; int done = 0; ivec = (char **) xmalloc((ic + 1) * sizeof(char *)); while (!done) { char *v; /* * skip to split char */ while (*s && (ch == ' ' ? (isascii((unsigned char)*s) && isspace((unsigned char)*s)) : *s == ch)) *s++ = '\0'; /* * End of string? */ if (!*s) break; /* * remember start of string */ v = s; /* * skip to split char */ while (*s && !(ch == ' ' ? (isascii((unsigned char)*s) && isspace((unsigned char)*s)) : *s == ch)) { if (*s++ == qc) { /* * Skip past string. */ s++; while (*s && *s != qc) s++; if (*s == qc) s++; } } if (!*s) done = 1; *s++ = '\0'; /* * save string in new ivec slot */ ivec[ic++] = v; ivec = (char **) xrealloc((voidp) ivec, (ic + 1) * sizeof(char *)); if (amuDebug(D_STR)) plog(XLOG_DEBUG, "strsplit saved \"%s\"", v); } if (amuDebug(D_STR)) plog(XLOG_DEBUG, "strsplit saved a total of %d strings", ic); ivec[ic] = NULL; return ivec; } /* * Use generic strlcpy to copy a string more carefully, null-terminating it * as needed. However, if the copied string was truncated due to lack of * space, then warn us. * * For now, xstrlcpy returns VOID because it doesn't look like anywhere in * the Amd code do we actually use the return value of strncpy/strlcpy. */ void #ifdef DEBUG _xstrlcpy(const char *filename, int lineno, char *dst, const char *src, size_t len) #else /* not DEBUG */ xstrlcpy(char *dst, const char *src, size_t len) #endif /* not DEBUG */ { if (len == 0) return; if (strlcpy(dst, src, len) >= len) #ifdef DEBUG plog(XLOG_ERROR, "xstrlcpy(%s:%d): string \"%s\" truncated to \"%s\"", filename, lineno, src, dst); #else /* not DEBUG */ plog(XLOG_ERROR, "xstrlcpy: string \"%s\" truncated to \"%s\"", src, dst); #endif /* not DEBUG */ } /* * Use generic strlcat to concatenate a string more carefully, * null-terminating it as needed. However, if the copied string was * truncated due to lack of space, then warn us. * * For now, xstrlcat returns VOID because it doesn't look like anywhere in * the Amd code do we actually use the return value of strncat/strlcat. */ void #ifdef DEBUG _xstrlcat(const char *filename, int lineno, char *dst, const char *src, size_t len) #else /* not DEBUG */ xstrlcat(char *dst, const char *src, size_t len) #endif /* not DEBUG */ { if (len == 0) return; if (strlcat(dst, src, len) >= len) { /* strlcat does not null terminate if the size of src is equal to len. */ dst[strlen(dst) - 1] = '\0'; #ifdef DEBUG plog(XLOG_ERROR, "xstrlcat(%s:%d): string \"%s\" truncated to \"%s\"", filename, lineno, src, dst); #else /* not DEBUG */ plog(XLOG_ERROR, "xstrlcat: string \"%s\" truncated to \"%s\"", src, dst); #endif /* not DEBUG */ } } /* our version of snprintf */ int #if defined(DEBUG) && (defined(HAVE_C99_VARARGS_MACROS) || defined(HAVE_GCC_VARARGS_MACROS)) _xsnprintf(const char *filename, int lineno, char *str, size_t size, const char *format, ...) #else /* not DEBUG or no C99/GCC-style vararg cpp macros supported */ xsnprintf(char *str, size_t size, const char *format, ...) #endif /* not DEBUG or no C99/GCC-style vararg cpp macros supported */ { va_list ap; int ret = 0; va_start(ap, format); #if defined(DEBUG) && (defined(HAVE_C99_VARARGS_MACROS) || defined(HAVE_GCC_VARARGS_MACROS)) ret = _xvsnprintf(filename, lineno, str, size, format, ap); #else /* not DEBUG or no C99/GCC-style vararg cpp macros supported */ ret = xvsnprintf(str, size, format, ap); #endif /* not DEBUG or no C99/GCC-style vararg cpp macros supported */ va_end(ap); return ret; } /* our version of vsnprintf */ int #if defined(DEBUG) && (defined(HAVE_C99_VARARGS_MACROS) || defined(HAVE_GCC_VARARGS_MACROS)) _xvsnprintf(const char *filename, int lineno, char *str, size_t size, const char *format, va_list ap) #else /* not DEBUG or no C99/GCC-style vararg cpp macros supported */ xvsnprintf(char *str, size_t size, const char *format, va_list ap) #endif /* not DEBUG or no C99/GCC-style vararg cpp macros supported */ { int ret = 0; #ifdef HAVE_VSNPRINTF ret = vsnprintf(str, size, format, ap); #else /* not HAVE_VSNPRINTF */ ret = vsprintf(str, format, ap); /* less secure version */ #endif /* not HAVE_VSNPRINTF */ /* * If error or truncation, plog error. * * WARNING: we use the static 'maxtrunc' variable below to break out any * possible infinite recursion between plog() and xvsnprintf(). If it * ever happens, it'd indicate a bug in Amd. */ if (ret < 0 || (size_t) ret >= size) { /* error or truncation occured */ static int maxtrunc; /* hack to avoid inifinite loop */ if (++maxtrunc > 10) #if defined(DEBUG) && (defined(HAVE_C99_VARARGS_MACROS) || defined(HAVE_GCC_VARARGS_MACROS)) plog(XLOG_ERROR, "xvsnprintf(%s:%d): string %p truncated (ret=%d, format=\"%s\")", filename, lineno, str, ret, format); #else /* not DEBUG or no C99/GCC-style vararg cpp macros supported */ plog(XLOG_ERROR, "xvsnprintf: string %p truncated (ret=%d, format=\"%s\")", str, ret, format); #endif /* not DEBUG or no C99/GCC-style vararg cpp macros supported */ } return ret; } static size_t vstrlen(const char *src, va_list ap) { size_t len = strlen(src); while ((src = va_arg(ap, const char *)) != NULL) len += strlen(src); return len; } static void vstrcpy(char *dst, const char *src, va_list ap) { strcpy(dst, src); while ((src = va_arg(ap, const char *)) != NULL) strcat(dst, src); } char * strvcat(const char *src, ...) { size_t len; char *dst; va_list ap; va_start(ap, src); len = vstrlen(src, ap); va_end(ap); dst = xmalloc(len + 1); va_start(ap, src); vstrcpy(dst, src, ap); va_end(ap); return dst; }