/* * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * misc parsing utilities */ #include <time.h> #include "avstring.h" #include "avutil.h" #include "common.h" #include "eval.h" #include "log.h" #include "random_seed.h" #include "time_internal.h" #include "parseutils.h" #include "time.h" #ifdef TEST #define av_get_random_seed av_get_random_seed_deterministic static uint32_t av_get_random_seed_deterministic(void); #define av_gettime() 1331972053200000 #endif int av_parse_ratio(AVRational *q, const char *str, int max, int log_offset, void *log_ctx) { char c; int ret; if (sscanf(str, "%d:%d%c", &q->num, &q->den, &c) != 2) { double d; ret = av_expr_parse_and_eval(&d, str, NULL, NULL, NULL, NULL, NULL, NULL, NULL, log_offset, log_ctx); if (ret < 0) return ret; *q = av_d2q(d, max); } else { av_reduce(&q->num, &q->den, q->num, q->den, max); } return 0; } typedef struct VideoSizeAbbr { const char *abbr; int width, height; } VideoSizeAbbr; typedef struct VideoRateAbbr { const char *abbr; AVRational rate; } VideoRateAbbr; static const VideoSizeAbbr video_size_abbrs[] = { { "ntsc", 720, 480 }, { "pal", 720, 576 }, { "qntsc", 352, 240 }, /* VCD compliant NTSC */ { "qpal", 352, 288 }, /* VCD compliant PAL */ { "sntsc", 640, 480 }, /* square pixel NTSC */ { "spal", 768, 576 }, /* square pixel PAL */ { "film", 352, 240 }, { "ntsc-film", 352, 240 }, { "sqcif", 128, 96 }, { "qcif", 176, 144 }, { "cif", 352, 288 }, { "4cif", 704, 576 }, { "16cif", 1408,1152 }, { "qqvga", 160, 120 }, { "qvga", 320, 240 }, { "vga", 640, 480 }, { "svga", 800, 600 }, { "xga", 1024, 768 }, { "uxga", 1600,1200 }, { "qxga", 2048,1536 }, { "sxga", 1280,1024 }, { "qsxga", 2560,2048 }, { "hsxga", 5120,4096 }, { "wvga", 852, 480 }, { "wxga", 1366, 768 }, { "wsxga", 1600,1024 }, { "wuxga", 1920,1200 }, { "woxga", 2560,1600 }, { "wqsxga", 3200,2048 }, { "wquxga", 3840,2400 }, { "whsxga", 6400,4096 }, { "whuxga", 7680,4800 }, { "cga", 320, 200 }, { "ega", 640, 350 }, { "hd480", 852, 480 }, { "hd720", 1280, 720 }, { "hd1080", 1920,1080 }, { "2k", 2048,1080 }, /* Digital Cinema System Specification */ { "2kdci", 2048,1080 }, { "2kflat", 1998,1080 }, { "2kscope", 2048, 858 }, { "4k", 4096,2160 }, /* Digital Cinema System Specification */ { "4kdci", 4096,2160 }, { "4kflat", 3996,2160 }, { "4kscope", 4096,1716 }, { "nhd", 640,360 }, { "hqvga", 240,160 }, { "wqvga", 400,240 }, { "fwqvga", 432,240 }, { "hvga", 480,320 }, { "qhd", 960,540 }, { "uhd2160", 3840,2160 }, { "uhd4320", 7680,4320 }, }; static const VideoRateAbbr video_rate_abbrs[]= { { "ntsc", { 30000, 1001 } }, { "pal", { 25, 1 } }, { "qntsc", { 30000, 1001 } }, /* VCD compliant NTSC */ { "qpal", { 25, 1 } }, /* VCD compliant PAL */ { "sntsc", { 30000, 1001 } }, /* square pixel NTSC */ { "spal", { 25, 1 } }, /* square pixel PAL */ { "film", { 24, 1 } }, { "ntsc-film", { 24000, 1001 } }, }; int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str) { int i; int n = FF_ARRAY_ELEMS(video_size_abbrs); const char *p; int width = 0, height = 0; for (i = 0; i < n; i++) { if (!strcmp(video_size_abbrs[i].abbr, str)) { width = video_size_abbrs[i].width; height = video_size_abbrs[i].height; break; } } if (i == n) { width = strtol(str, (void*)&p, 10); if (*p) p++; height = strtol(p, (void*)&p, 10); /* trailing extraneous data detected, like in 123x345foobar */ if (*p) return AVERROR(EINVAL); } if (width <= 0 || height <= 0) return AVERROR(EINVAL); *width_ptr = width; *height_ptr = height; return 0; } int av_parse_video_rate(AVRational *rate, const char *arg) { int i, ret; int n = FF_ARRAY_ELEMS(video_rate_abbrs); /* First, we check our abbreviation table */ for (i = 0; i < n; ++i) if (!strcmp(video_rate_abbrs[i].abbr, arg)) { *rate = video_rate_abbrs[i].rate; return 0; } /* Then, we try to parse it as fraction */ if ((ret = av_parse_ratio_quiet(rate, arg, 1001000)) < 0) return ret; if (rate->num <= 0 || rate->den <= 0) return AVERROR(EINVAL); return 0; } typedef struct ColorEntry { const char *name; ///< a string representing the name of the color uint8_t rgb_color[3]; ///< RGB values for the color } ColorEntry; static const ColorEntry color_table[] = { { "AliceBlue", { 0xF0, 0xF8, 0xFF } }, { "AntiqueWhite", { 0xFA, 0xEB, 0xD7 } }, { "Aqua", { 0x00, 0xFF, 0xFF } }, { "Aquamarine", { 0x7F, 0xFF, 0xD4 } }, { "Azure", { 0xF0, 0xFF, 0xFF } }, { "Beige", { 0xF5, 0xF5, 0xDC } }, { "Bisque", { 0xFF, 0xE4, 0xC4 } }, { "Black", { 0x00, 0x00, 0x00 } }, { "BlanchedAlmond", { 0xFF, 0xEB, 0xCD } }, { "Blue", { 0x00, 0x00, 0xFF } }, { "BlueViolet", { 0x8A, 0x2B, 0xE2 } }, { "Brown", { 0xA5, 0x2A, 0x2A } }, { "BurlyWood", { 0xDE, 0xB8, 0x87 } }, { "CadetBlue", { 0x5F, 0x9E, 0xA0 } }, { "Chartreuse", { 0x7F, 0xFF, 0x00 } }, { "Chocolate", { 0xD2, 0x69, 0x1E } }, { "Coral", { 0xFF, 0x7F, 0x50 } }, { "CornflowerBlue", { 0x64, 0x95, 0xED } }, { "Cornsilk", { 0xFF, 0xF8, 0xDC } }, { "Crimson", { 0xDC, 0x14, 0x3C } }, { "Cyan", { 0x00, 0xFF, 0xFF } }, { "DarkBlue", { 0x00, 0x00, 0x8B } }, { "DarkCyan", { 0x00, 0x8B, 0x8B } }, { "DarkGoldenRod", { 0xB8, 0x86, 0x0B } }, { "DarkGray", { 0xA9, 0xA9, 0xA9 } }, { "DarkGreen", { 0x00, 0x64, 0x00 } }, { "DarkKhaki", { 0xBD, 0xB7, 0x6B } }, { "DarkMagenta", { 0x8B, 0x00, 0x8B } }, { "DarkOliveGreen", { 0x55, 0x6B, 0x2F } }, { "Darkorange", { 0xFF, 0x8C, 0x00 } }, { "DarkOrchid", { 0x99, 0x32, 0xCC } }, { "DarkRed", { 0x8B, 0x00, 0x00 } }, { "DarkSalmon", { 0xE9, 0x96, 0x7A } }, { "DarkSeaGreen", { 0x8F, 0xBC, 0x8F } }, { "DarkSlateBlue", { 0x48, 0x3D, 0x8B } }, { "DarkSlateGray", { 0x2F, 0x4F, 0x4F } }, { "DarkTurquoise", { 0x00, 0xCE, 0xD1 } }, { "DarkViolet", { 0x94, 0x00, 0xD3 } }, { "DeepPink", { 0xFF, 0x14, 0x93 } }, { "DeepSkyBlue", { 0x00, 0xBF, 0xFF } }, { "DimGray", { 0x69, 0x69, 0x69 } }, { "DodgerBlue", { 0x1E, 0x90, 0xFF } }, { "FireBrick", { 0xB2, 0x22, 0x22 } }, { "FloralWhite", { 0xFF, 0xFA, 0xF0 } }, { "ForestGreen", { 0x22, 0x8B, 0x22 } }, { "Fuchsia", { 0xFF, 0x00, 0xFF } }, { "Gainsboro", { 0xDC, 0xDC, 0xDC } }, { "GhostWhite", { 0xF8, 0xF8, 0xFF } }, { "Gold", { 0xFF, 0xD7, 0x00 } }, { "GoldenRod", { 0xDA, 0xA5, 0x20 } }, { "Gray", { 0x80, 0x80, 0x80 } }, { "Green", { 0x00, 0x80, 0x00 } }, { "GreenYellow", { 0xAD, 0xFF, 0x2F } }, { "HoneyDew", { 0xF0, 0xFF, 0xF0 } }, { "HotPink", { 0xFF, 0x69, 0xB4 } }, { "IndianRed", { 0xCD, 0x5C, 0x5C } }, { "Indigo", { 0x4B, 0x00, 0x82 } }, { "Ivory", { 0xFF, 0xFF, 0xF0 } }, { "Khaki", { 0xF0, 0xE6, 0x8C } }, { "Lavender", { 0xE6, 0xE6, 0xFA } }, { "LavenderBlush", { 0xFF, 0xF0, 0xF5 } }, { "LawnGreen", { 0x7C, 0xFC, 0x00 } }, { "LemonChiffon", { 0xFF, 0xFA, 0xCD } }, { "LightBlue", { 0xAD, 0xD8, 0xE6 } }, { "LightCoral", { 0xF0, 0x80, 0x80 } }, { "LightCyan", { 0xE0, 0xFF, 0xFF } }, { "LightGoldenRodYellow", { 0xFA, 0xFA, 0xD2 } }, { "LightGreen", { 0x90, 0xEE, 0x90 } }, { "LightGrey", { 0xD3, 0xD3, 0xD3 } }, { "LightPink", { 0xFF, 0xB6, 0xC1 } }, { "LightSalmon", { 0xFF, 0xA0, 0x7A } }, { "LightSeaGreen", { 0x20, 0xB2, 0xAA } }, { "LightSkyBlue", { 0x87, 0xCE, 0xFA } }, { "LightSlateGray", { 0x77, 0x88, 0x99 } }, { "LightSteelBlue", { 0xB0, 0xC4, 0xDE } }, { "LightYellow", { 0xFF, 0xFF, 0xE0 } }, { "Lime", { 0x00, 0xFF, 0x00 } }, { "LimeGreen", { 0x32, 0xCD, 0x32 } }, { "Linen", { 0xFA, 0xF0, 0xE6 } }, { "Magenta", { 0xFF, 0x00, 0xFF } }, { "Maroon", { 0x80, 0x00, 0x00 } }, { "MediumAquaMarine", { 0x66, 0xCD, 0xAA } }, { "MediumBlue", { 0x00, 0x00, 0xCD } }, { "MediumOrchid", { 0xBA, 0x55, 0xD3 } }, { "MediumPurple", { 0x93, 0x70, 0xD8 } }, { "MediumSeaGreen", { 0x3C, 0xB3, 0x71 } }, { "MediumSlateBlue", { 0x7B, 0x68, 0xEE } }, { "MediumSpringGreen", { 0x00, 0xFA, 0x9A } }, { "MediumTurquoise", { 0x48, 0xD1, 0xCC } }, { "MediumVioletRed", { 0xC7, 0x15, 0x85 } }, { "MidnightBlue", { 0x19, 0x19, 0x70 } }, { "MintCream", { 0xF5, 0xFF, 0xFA } }, { "MistyRose", { 0xFF, 0xE4, 0xE1 } }, { "Moccasin", { 0xFF, 0xE4, 0xB5 } }, { "NavajoWhite", { 0xFF, 0xDE, 0xAD } }, { "Navy", { 0x00, 0x00, 0x80 } }, { "OldLace", { 0xFD, 0xF5, 0xE6 } }, { "Olive", { 0x80, 0x80, 0x00 } }, { "OliveDrab", { 0x6B, 0x8E, 0x23 } }, { "Orange", { 0xFF, 0xA5, 0x00 } }, { "OrangeRed", { 0xFF, 0x45, 0x00 } }, { "Orchid", { 0xDA, 0x70, 0xD6 } }, { "PaleGoldenRod", { 0xEE, 0xE8, 0xAA } }, { "PaleGreen", { 0x98, 0xFB, 0x98 } }, { "PaleTurquoise", { 0xAF, 0xEE, 0xEE } }, { "PaleVioletRed", { 0xD8, 0x70, 0x93 } }, { "PapayaWhip", { 0xFF, 0xEF, 0xD5 } }, { "PeachPuff", { 0xFF, 0xDA, 0xB9 } }, { "Peru", { 0xCD, 0x85, 0x3F } }, { "Pink", { 0xFF, 0xC0, 0xCB } }, { "Plum", { 0xDD, 0xA0, 0xDD } }, { "PowderBlue", { 0xB0, 0xE0, 0xE6 } }, { "Purple", { 0x80, 0x00, 0x80 } }, { "Red", { 0xFF, 0x00, 0x00 } }, { "RosyBrown", { 0xBC, 0x8F, 0x8F } }, { "RoyalBlue", { 0x41, 0x69, 0xE1 } }, { "SaddleBrown", { 0x8B, 0x45, 0x13 } }, { "Salmon", { 0xFA, 0x80, 0x72 } }, { "SandyBrown", { 0xF4, 0xA4, 0x60 } }, { "SeaGreen", { 0x2E, 0x8B, 0x57 } }, { "SeaShell", { 0xFF, 0xF5, 0xEE } }, { "Sienna", { 0xA0, 0x52, 0x2D } }, { "Silver", { 0xC0, 0xC0, 0xC0 } }, { "SkyBlue", { 0x87, 0xCE, 0xEB } }, { "SlateBlue", { 0x6A, 0x5A, 0xCD } }, { "SlateGray", { 0x70, 0x80, 0x90 } }, { "Snow", { 0xFF, 0xFA, 0xFA } }, { "SpringGreen", { 0x00, 0xFF, 0x7F } }, { "SteelBlue", { 0x46, 0x82, 0xB4 } }, { "Tan", { 0xD2, 0xB4, 0x8C } }, { "Teal", { 0x00, 0x80, 0x80 } }, { "Thistle", { 0xD8, 0xBF, 0xD8 } }, { "Tomato", { 0xFF, 0x63, 0x47 } }, { "Turquoise", { 0x40, 0xE0, 0xD0 } }, { "Violet", { 0xEE, 0x82, 0xEE } }, { "Wheat", { 0xF5, 0xDE, 0xB3 } }, { "White", { 0xFF, 0xFF, 0xFF } }, { "WhiteSmoke", { 0xF5, 0xF5, 0xF5 } }, { "Yellow", { 0xFF, 0xFF, 0x00 } }, { "YellowGreen", { 0x9A, 0xCD, 0x32 } }, }; static int color_table_compare(const void *lhs, const void *rhs) { return av_strcasecmp(lhs, ((const ColorEntry *)rhs)->name); } #define ALPHA_SEP '@' int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen, void *log_ctx) { char *tail, color_string2[128]; const ColorEntry *entry; int len, hex_offset = 0; if (color_string[0] == '#') { hex_offset = 1; } else if (!strncmp(color_string, "0x", 2)) hex_offset = 2; if (slen < 0) slen = strlen(color_string); av_strlcpy(color_string2, color_string + hex_offset, FFMIN(slen-hex_offset+1, sizeof(color_string2))); if ((tail = strchr(color_string2, ALPHA_SEP))) *tail++ = 0; len = strlen(color_string2); rgba_color[3] = 255; if (!av_strcasecmp(color_string2, "random") || !av_strcasecmp(color_string2, "bikeshed")) { int rgba = av_get_random_seed(); rgba_color[0] = rgba >> 24; rgba_color[1] = rgba >> 16; rgba_color[2] = rgba >> 8; rgba_color[3] = rgba; } else if (hex_offset || strspn(color_string2, "0123456789ABCDEFabcdef") == len) { char *tail; unsigned int rgba = strtoul(color_string2, &tail, 16); if (*tail || (len != 6 && len != 8)) { av_log(log_ctx, AV_LOG_ERROR, "Invalid 0xRRGGBB[AA] color string: '%s'\n", color_string2); return AVERROR(EINVAL); } if (len == 8) { rgba_color[3] = rgba; rgba >>= 8; } rgba_color[0] = rgba >> 16; rgba_color[1] = rgba >> 8; rgba_color[2] = rgba; } else { entry = bsearch(color_string2, color_table, FF_ARRAY_ELEMS(color_table), sizeof(ColorEntry), color_table_compare); if (!entry) { av_log(log_ctx, AV_LOG_ERROR, "Cannot find color '%s'\n", color_string2); return AVERROR(EINVAL); } memcpy(rgba_color, entry->rgb_color, 3); } if (tail) { double alpha; const char *alpha_string = tail; if (!strncmp(alpha_string, "0x", 2)) { alpha = strtoul(alpha_string, &tail, 16); } else { double norm_alpha = strtod(alpha_string, &tail); if (norm_alpha < 0.0 || norm_alpha > 1.0) alpha = 256; else alpha = 255 * norm_alpha; } if (tail == alpha_string || *tail || alpha > 255 || alpha < 0) { av_log(log_ctx, AV_LOG_ERROR, "Invalid alpha value specifier '%s' in '%s'\n", alpha_string, color_string); return AVERROR(EINVAL); } rgba_color[3] = alpha; } return 0; } const char *av_get_known_color_name(int color_idx, const uint8_t **rgbp) { const ColorEntry *color; if ((unsigned)color_idx >= FF_ARRAY_ELEMS(color_table)) return NULL; color = &color_table[color_idx]; if (rgbp) *rgbp = color->rgb_color; return color->name; } /* get a positive number between n_min and n_max, for a maximum length of len_max. Return -1 if error. */ static int date_get_num(const char **pp, int n_min, int n_max, int len_max) { int i, val, c; const char *p; p = *pp; val = 0; for(i = 0; i < len_max; i++) { c = *p; if (!av_isdigit(c)) break; val = (val * 10) + c - '0'; p++; } /* no number read ? */ if (p == *pp) return -1; if (val < n_min || val > n_max) return -1; *pp = p; return val; } char *av_small_strptime(const char *p, const char *fmt, struct tm *dt) { int c, val; while((c = *fmt++)) { if (c != '%') { if (av_isspace(c)) for (; *p && av_isspace(*p); p++); else if (*p != c) return NULL; else p++; continue; } c = *fmt++; switch(c) { case 'H': case 'J': val = date_get_num(&p, 0, c == 'H' ? 23 : INT_MAX, 2); if (val == -1) return NULL; dt->tm_hour = val; break; case 'M': val = date_get_num(&p, 0, 59, 2); if (val == -1) return NULL; dt->tm_min = val; break; case 'S': val = date_get_num(&p, 0, 59, 2); if (val == -1) return NULL; dt->tm_sec = val; break; case 'Y': val = date_get_num(&p, 0, 9999, 4); if (val == -1) return NULL; dt->tm_year = val - 1900; break; case 'm': val = date_get_num(&p, 1, 12, 2); if (val == -1) return NULL; dt->tm_mon = val - 1; break; case 'd': val = date_get_num(&p, 1, 31, 2); if (val == -1) return NULL; dt->tm_mday = val; break; case 'T': p = av_small_strptime(p, "%H:%M:%S", dt); if (!p) return NULL; break; case '%': if (*p++ != '%') return NULL; break; default: return NULL; } } return (char*)p; } time_t av_timegm(struct tm *tm) { time_t t; int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday; if (m < 3) { m += 12; y--; } t = 86400LL * (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + y / 400 - 719469); t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec; return t; } int av_parse_time(int64_t *timeval, const char *timestr, int duration) { const char *p, *q; int64_t t, now64; time_t now; struct tm dt = { 0 }, tmbuf; int today = 0, negative = 0, microseconds = 0; int i; static const char * const date_fmt[] = { "%Y - %m - %d", "%Y%m%d", }; static const char * const time_fmt[] = { "%H:%M:%S", "%H%M%S", }; static const char * const tz_fmt[] = { "%H:%M", "%H%M", "%H", }; p = timestr; q = NULL; *timeval = INT64_MIN; if (!duration) { now64 = av_gettime(); now = now64 / 1000000; if (!av_strcasecmp(timestr, "now")) { *timeval = now64; return 0; } /* parse the year-month-day part */ for (i = 0; i < FF_ARRAY_ELEMS(date_fmt); i++) { q = av_small_strptime(p, date_fmt[i], &dt); if (q) break; } /* if the year-month-day part is missing, then take the * current year-month-day time */ if (!q) { today = 1; q = p; } p = q; if (*p == 'T' || *p == 't') p++; else while (av_isspace(*p)) p++; /* parse the hour-minute-second part */ for (i = 0; i < FF_ARRAY_ELEMS(time_fmt); i++) { q = av_small_strptime(p, time_fmt[i], &dt); if (q) break; } } else { /* parse timestr as a duration */ if (p[0] == '-') { negative = 1; ++p; } /* parse timestr as HH:MM:SS */ q = av_small_strptime(p, "%J:%M:%S", &dt); if (!q) { /* parse timestr as MM:SS */ q = av_small_strptime(p, "%M:%S", &dt); dt.tm_hour = 0; } if (!q) { char *o; /* parse timestr as S+ */ dt.tm_sec = strtol(p, &o, 10); if (o == p) /* the parsing didn't succeed */ return AVERROR(EINVAL); dt.tm_min = 0; dt.tm_hour = 0; q = o; } } /* Now we have all the fields that we can get */ if (!q) return AVERROR(EINVAL); /* parse the .m... part */ if (*q == '.') { int n; q++; for (n = 100000; n >= 1; n /= 10, q++) { if (!av_isdigit(*q)) break; microseconds += n * (*q - '0'); } while (av_isdigit(*q)) q++; } if (duration) { t = dt.tm_hour * 3600 + dt.tm_min * 60 + dt.tm_sec; } else { int is_utc = *q == 'Z' || *q == 'z'; int tzoffset = 0; q += is_utc; if (!today && !is_utc && (*q == '+' || *q == '-')) { struct tm tz = { 0 }; int sign = (*q == '+' ? -1 : 1); q++; p = q; for (i = 0; i < FF_ARRAY_ELEMS(tz_fmt); i++) { q = av_small_strptime(p, tz_fmt[i], &tz); if (q) break; } if (!q) return AVERROR(EINVAL); tzoffset = sign * (tz.tm_hour * 60 + tz.tm_min) * 60; is_utc = 1; } if (today) { /* fill in today's date */ struct tm dt2 = is_utc ? *gmtime_r(&now, &tmbuf) : *localtime_r(&now, &tmbuf); dt2.tm_hour = dt.tm_hour; dt2.tm_min = dt.tm_min; dt2.tm_sec = dt.tm_sec; dt = dt2; } t = is_utc ? av_timegm(&dt) : mktime(&dt); t += tzoffset; } /* Check that we are at the end of the string */ if (*q) return AVERROR(EINVAL); t *= 1000000; t += microseconds; *timeval = negative ? -t : t; return 0; } int av_find_info_tag(char *arg, int arg_size, const char *tag1, const char *info) { const char *p; char tag[128], *q; p = info; if (*p == '?') p++; for(;;) { q = tag; while (*p != '\0' && *p != '=' && *p != '&') { if ((q - tag) < sizeof(tag) - 1) *q++ = *p; p++; } *q = '\0'; q = arg; if (*p == '=') { p++; while (*p != '&' && *p != '\0') { if ((q - arg) < arg_size - 1) { if (*p == '+') *q++ = ' '; else *q++ = *p; } p++; } } *q = '\0'; if (!strcmp(tag, tag1)) return 1; if (*p != '&') break; p++; } return 0; }