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Diffstat (limited to 'cddl/contrib/opensolaris/lib/libdtrace/common/dt_string.c')
| -rw-r--r-- | cddl/contrib/opensolaris/lib/libdtrace/common/dt_string.c | 309 |
1 files changed, 309 insertions, 0 deletions
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_string.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_string.c new file mode 100644 index 000000000000..782d66c2b8a6 --- /dev/null +++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_string.c @@ -0,0 +1,309 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ + +/* + * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. + */ + +#include <strings.h> +#include <stdlib.h> +#include <errno.h> +#include <ctype.h> + +#include <dt_string.h> + +/* + * Transform string s inline, converting each embedded C escape sequence string + * to the corresponding character. For example, the substring "\n" is replaced + * by an inline '\n' character. The length of the resulting string is returned. + */ +size_t +stresc2chr(char *s) +{ + char *p, *q, c; + int esc = 0; + int x; + + for (p = q = s; (c = *p) != '\0'; p++) { + if (esc) { + switch (c) { + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + c -= '0'; + p++; + + if (*p >= '0' && *p <= '7') { + c = c * 8 + *p++ - '0'; + + if (*p >= '0' && *p <= '7') + c = c * 8 + *p - '0'; + else + p--; + } else + p--; + + *q++ = c; + break; + + case 'a': + *q++ = '\a'; + break; + case 'b': + *q++ = '\b'; + break; + case 'f': + *q++ = '\f'; + break; + case 'n': + *q++ = '\n'; + break; + case 'r': + *q++ = '\r'; + break; + case 't': + *q++ = '\t'; + break; + case 'v': + *q++ = '\v'; + break; + + case 'x': + for (x = 0; (c = *++p) != '\0'; ) { + if (c >= '0' && c <= '9') + x = x * 16 + c - '0'; + else if (c >= 'a' && c <= 'f') + x = x * 16 + c - 'a' + 10; + else if (c >= 'A' && c <= 'F') + x = x * 16 + c - 'A' + 10; + else + break; + } + *q++ = (char)x; + p--; + break; + + case '"': + case '\\': + *q++ = c; + break; + default: + *q++ = '\\'; + *q++ = c; + } + + esc = 0; + + } else { + if ((esc = c == '\\') == 0) + *q++ = c; + } + } + + *q = '\0'; + return ((size_t)(q - s)); +} + +/* + * Create a copy of string s in which certain unprintable or special characters + * have been converted to the string representation of their C escape sequence. + * For example, the newline character is expanded to the string "\n". + */ +char * +strchr2esc(const char *s, size_t n) +{ + const char *p; + char *q, *s2, c; + size_t addl = 0; + + for (p = s; p < s + n; p++) { + switch (c = *p) { + case '\0': + case '\a': + case '\b': + case '\f': + case '\n': + case '\r': + case '\t': + case '\v': + case '"': + case '\\': + addl++; /* 1 add'l char needed to follow \ */ + break; + case ' ': + break; + default: + if (c < '!' || c > '~') + addl += 3; /* 3 add'l chars following \ */ + } + } + + if ((s2 = malloc(n + addl + 1)) == NULL) + return (NULL); + + for (p = s, q = s2; p < s + n; p++) { + switch (c = *p) { + case '\0': + *q++ = '\\'; + *q++ = '0'; + break; + case '\a': + *q++ = '\\'; + *q++ = 'a'; + break; + case '\b': + *q++ = '\\'; + *q++ = 'b'; + break; + case '\f': + *q++ = '\\'; + *q++ = 'f'; + break; + case '\n': + *q++ = '\\'; + *q++ = 'n'; + break; + case '\r': + *q++ = '\\'; + *q++ = 'r'; + break; + case '\t': + *q++ = '\\'; + *q++ = 't'; + break; + case '\v': + *q++ = '\\'; + *q++ = 'v'; + break; + case '"': + *q++ = '\\'; + *q++ = '"'; + break; + case '\\': + *q++ = '\\'; + *q++ = '\\'; + break; + case ' ': + *q++ = c; + break; + default: + if (c < '!' || c > '~') { + *q++ = '\\'; + *q++ = ((c >> 6) & 3) + '0'; + *q++ = ((c >> 3) & 7) + '0'; + *q++ = (c & 7) + '0'; + } else + *q++ = c; + } + + if (c == '\0') + break; /* don't continue past \0 even if p < s + n */ + } + + *q = '\0'; + return (s2); +} + +/* + * Return the basename (name after final /) of the given string. We use + * strbasename rather than basename to avoid conflicting with libgen.h's + * non-const function prototype. + */ +const char * +strbasename(const char *s) +{ + const char *p = strrchr(s, '/'); + + if (p == NULL) + return (s); + + return (++p); +} + +/* + * This function tests a string against the regular expression used for idents + * and integers in the D lexer, and should match the superset of RGX_IDENT and + * RGX_INT in dt_lex.l. If an invalid character is found, the function returns + * a pointer to it. Otherwise NULL is returned for a valid string. + */ +const char * +strbadidnum(const char *s) +{ + char *p; + int c; + + if (*s == '\0') + return (s); + + errno = 0; + (void) strtoull(s, &p, 0); + + if (errno == 0 && *p == '\0') + return (NULL); /* matches RGX_INT */ + + while ((c = *s++) != '\0') { + if (isalnum(c) == 0 && c != '_' && c != '`') + return (s - 1); + } + + return (NULL); /* matches RGX_IDENT */ +} + +/* + * Determine whether the string contains a glob matching pattern or is just a + * simple string. See gmatch(3GEN) and sh(1) for the glob syntax definition. + */ +int +strisglob(const char *s) +{ + char c; + + while ((c = *s++) != '\0') { + if (c == '[' || c == '?' || c == '*' || c == '\\') + return (1); + } + + return (0); +} + +/* + * Hyphenate a string in-place by converting any instances of "__" to "-", + * which we use for probe names to improve readability, and return the string. + */ +char * +strhyphenate(char *s) +{ + char *p, *q; + + for (p = s, q = p + strlen(p); p < q; p++) { + if (p[0] == '_' && p[1] == '_') { + p[0] = '-'; + bcopy(p + 2, p + 1, (size_t)(q - p) - 1); + } + } + + return (s); +} |