/* * Copyright (c) 2000, 2001, 2002 Fabrice Bellard * Copyright (c) 2007 Mans Rullgard * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <stdarg.h> #include <stdint.h> #include <stdio.h> #include <string.h> #include "config.h" #include "common.h" #include "mem.h" #include "avstring.h" int av_strstart(const char *str, const char *pfx, const char **ptr) { while (*pfx && *pfx == *str) { pfx++; str++; } if (!*pfx && ptr) *ptr = str; return !*pfx; } int av_stristart(const char *str, const char *pfx, const char **ptr) { while (*pfx && av_toupper((unsigned)*pfx) == av_toupper((unsigned)*str)) { pfx++; str++; } if (!*pfx && ptr) *ptr = str; return !*pfx; } char *av_stristr(const char *s1, const char *s2) { if (!*s2) return s1; do if (av_stristart(s1, s2, NULL)) return s1; while (*s1++); return NULL; } char *av_strnstr(const char *haystack, const char *needle, size_t hay_length) { size_t needle_len = strlen(needle); if (!needle_len) return haystack; while (hay_length >= needle_len) { hay_length--; if (!memcmp(haystack, needle, needle_len)) return haystack; haystack++; } return NULL; } size_t av_strlcpy(char *dst, const char *src, size_t size) { size_t len = 0; while (++len < size && *src) *dst++ = *src++; if (len <= size) *dst = 0; return len + strlen(src) - 1; } size_t av_strlcat(char *dst, const char *src, size_t size) { size_t len = strlen(dst); if (size <= len + 1) return len + strlen(src); return len + av_strlcpy(dst + len, src, size - len); } size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...) { int len = strlen(dst); va_list vl; va_start(vl, fmt); len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl); va_end(vl); return len; } char *av_d2str(double d) { char *str = av_malloc(16); if (str) snprintf(str, 16, "%f", d); return str; } #define WHITESPACES " \n\t" char *av_get_token(const char **buf, const char *term) { char *out = av_malloc(strlen(*buf) + 1); char *ret = out, *end = out; const char *p = *buf; if (!out) return NULL; p += strspn(p, WHITESPACES); while (*p && !strspn(p, term)) { char c = *p++; if (c == '\\' && *p) { *out++ = *p++; end = out; } else if (c == '\'') { while (*p && *p != '\'') *out++ = *p++; if (*p) { p++; end = out; } } else { *out++ = c; } } do *out-- = 0; while (out >= end && strspn(out, WHITESPACES)); *buf = p; return ret; } int av_strcasecmp(const char *a, const char *b) { uint8_t c1, c2; do { c1 = av_tolower(*a++); c2 = av_tolower(*b++); } while (c1 && c1 == c2); return c1 - c2; } int av_strncasecmp(const char *a, const char *b, size_t n) { const char *end = a + n; uint8_t c1, c2; do { c1 = av_tolower(*a++); c2 = av_tolower(*b++); } while (a < end && c1 && c1 == c2); return c1 - c2; } const char *av_basename(const char *path) { char *p = strrchr(path, '/'); #if HAVE_DOS_PATHS char *q = strrchr(path, '\\'); char *d = strchr(path, ':'); p = FFMAX3(p, q, d); #endif if (!p) return path; return p + 1; } const char *av_dirname(char *path) { char *p = strrchr(path, '/'); #if HAVE_DOS_PATHS char *q = strrchr(path, '\\'); char *d = strchr(path, ':'); d = d ? d + 1 : d; p = FFMAX3(p, q, d); #endif if (!p) return "."; *p = '\0'; return path; } int av_match_name(const char *name, const char *names) { const char *p; int len, namelen; if (!name || !names) return 0; namelen = strlen(name); while ((p = strchr(names, ','))) { len = FFMAX(p - names, namelen); if (!av_strncasecmp(name, names, len)) return 1; names = p + 1; } return !av_strcasecmp(name, names); }