diff options
Diffstat (limited to 'src/basic/string-util.c')
| -rw-r--r-- | src/basic/string-util.c | 121 |
1 files changed, 87 insertions, 34 deletions
diff --git a/src/basic/string-util.c b/src/basic/string-util.c index 3179fba3ba..7e2f596edc 100644 --- a/src/basic/string-util.c +++ b/src/basic/string-util.c @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ /*** This file is part of systemd. @@ -21,6 +22,7 @@ #include <stdarg.h> #include <stdint.h> #include <stdio.h> +#include <stdio_ext.h> #include <stdlib.h> #include <string.h> @@ -278,6 +280,9 @@ char *strjoin_real(const char *x, ...) { char *strstrip(char *s) { char *e; + if (!s) + return NULL; + /* Drops trailing whitespace. Modifies the string in * place. Returns pointer to first non-space character */ @@ -295,7 +300,13 @@ char *strstrip(char *s) { char *delete_chars(char *s, const char *bad) { char *f, *t; - /* Drops all whitespace, regardless where in the string */ + /* Drops all specified bad characters, regardless where in the string */ + + if (!s) + return NULL; + + if (!bad) + bad = WHITESPACE; for (f = s, t = s; *f; f++) { if (strchr(bad, *f)) @@ -309,6 +320,26 @@ char *delete_chars(char *s, const char *bad) { return s; } +char *delete_trailing_chars(char *s, const char *bad) { + char *p, *c = s; + + /* Drops all specified bad characters, at the end of the string */ + + if (!s) + return NULL; + + if (!bad) + bad = WHITESPACE; + + for (p = s; *p; p++) + if (!strchr(bad, *p)) + c = p + 1; + + *c = 0; + + return s; +} + char *truncate_nl(char *s) { assert(s); @@ -472,6 +503,10 @@ char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigne assert(s); assert(percent <= 100); + + if (new_length == (size_t) -1) + return strndup(s, old_length); + assert(new_length >= 3); /* if no multibyte characters use ascii_ellipsize_mem for speed */ @@ -539,6 +574,10 @@ char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigne } char *ellipsize(const char *s, size_t length, unsigned percent) { + + if (length == (size_t) -1) + return strdup(s); + return ellipsize_mem(s, strlen(s), length, percent); } @@ -565,26 +604,26 @@ char* strshorten(char *s, size_t l) { } char *strreplace(const char *text, const char *old_string, const char *new_string) { + size_t l, old_len, new_len, allocated = 0; + char *t, *ret = NULL; const char *f; - char *t, *r; - size_t l, old_len, new_len; - assert(text); assert(old_string); assert(new_string); + if (!text) + return NULL; + old_len = strlen(old_string); new_len = strlen(new_string); l = strlen(text); - r = new(char, l+1); - if (!r) + if (!GREEDY_REALLOC(ret, allocated, l+1)) return NULL; f = text; - t = r; + t = ret; while (*f) { - char *a; size_t d, nl; if (!startswith(f, old_string)) { @@ -592,25 +631,21 @@ char *strreplace(const char *text, const char *old_string, const char *new_strin continue; } - d = t - r; + d = t - ret; nl = l - old_len + new_len; - a = realloc(r, nl + 1); - if (!a) - goto oom; + + if (!GREEDY_REALLOC(ret, allocated, nl + 1)) + return mfree(ret); l = nl; - r = a; - t = r + d; + t = ret + d; t = stpcpy(t, new_string); f += old_len; } *t = 0; - return r; - -oom: - return mfree(r); + return ret; } char *strip_tab_ansi(char **ibuf, size_t *_isz) { @@ -635,10 +670,10 @@ char *strip_tab_ansi(char **ibuf, size_t *_isz) { if (!f) return NULL; - /* Note we use the _unlocked() stdio variants on f for performance - * reasons. It's safe to do so since we created f here and it - * doesn't leave our scope. - */ + /* Note we turn off internal locking on f for performance reasons. It's safe to do so since we created f here + * and it doesn't leave our scope. */ + + (void) __fsetlocking(f, FSETLOCKING_BYCALLER); for (i = *ibuf; i < *ibuf + isz + 1; i++) { @@ -650,21 +685,21 @@ char *strip_tab_ansi(char **ibuf, size_t *_isz) { else if (*i == '\x1B') state = STATE_ESCAPE; else if (*i == '\t') - fputs_unlocked(" ", f); + fputs(" ", f); else - fputc_unlocked(*i, f); + fputc(*i, f); break; case STATE_ESCAPE: if (i >= *ibuf + isz) { /* EOT */ - fputc_unlocked('\x1B', f); + fputc('\x1B', f); break; } else if (*i == '[') { state = STATE_BRACKET; begin = i + 1; } else { - fputc_unlocked('\x1B', f); - fputc_unlocked(*i, f); + fputc('\x1B', f); + fputc(*i, f); state = STATE_OTHER; } @@ -674,8 +709,8 @@ char *strip_tab_ansi(char **ibuf, size_t *_isz) { if (i >= *ibuf + isz || /* EOT */ (!(*i >= '0' && *i <= '9') && !IN_SET(*i, ';', 'm'))) { - fputc_unlocked('\x1B', f); - fputc_unlocked('[', f); + fputc('\x1B', f); + fputc('[', f); state = STATE_OTHER; i = begin-1; } else if (*i == 'm') @@ -700,16 +735,20 @@ char *strip_tab_ansi(char **ibuf, size_t *_isz) { return obuf; } -char *strextend(char **x, ...) { - va_list ap; - size_t f, l; +char *strextend_with_separator(char **x, const char *separator, ...) { + bool need_separator; + size_t f, l, l_separator; char *r, *p; + va_list ap; assert(x); l = f = strlen_ptr(*x); - va_start(ap, x); + need_separator = !isempty(*x); + l_separator = strlen_ptr(separator); + + va_start(ap, separator); for (;;) { const char *t; size_t n; @@ -719,22 +758,29 @@ char *strextend(char **x, ...) { break; n = strlen(t); + + if (need_separator) + n += l_separator; + if (n > ((size_t) -1) - l) { va_end(ap); return NULL; } l += n; + need_separator = true; } va_end(ap); + need_separator = !isempty(*x); + r = realloc(*x, l+1); if (!r) return NULL; p = r + f; - va_start(ap, x); + va_start(ap, separator); for (;;) { const char *t; @@ -742,10 +788,17 @@ char *strextend(char **x, ...) { if (!t) break; + if (need_separator && separator) + p = stpcpy(p, separator); + p = stpcpy(p, t); + + need_separator = true; } va_end(ap); + assert(p == r + l); + *p = 0; *x = r; |