epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
herb | b906daf | 2015-09-29 09:37:59 -0700 | [diff] [blame] | 8 | #include "SkAtomics.h" |
Mike Reed | 33f38b0 | 2018-02-14 13:58:06 -0500 | [diff] [blame] | 9 | #include "SkSafeMath.h" |
Hal Canary | fdcfb8b | 2018-06-13 09:42:32 -0400 | [diff] [blame] | 10 | #include "SkString.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 11 | #include "SkUtils.h" |
Mike Klein | 79aea6a | 2018-06-11 10:45:26 -0400 | [diff] [blame] | 12 | #include <cstdio> |
| 13 | #include <new> |
| 14 | #include <stdarg.h> |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 15 | |
| 16 | // number of bytes (on the stack) to receive the printf result |
bsalomon@google.com | 77cf460 | 2013-04-22 21:05:48 +0000 | [diff] [blame] | 17 | static const size_t kBufferSize = 1024; |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 18 | |
Brian Salomon | 4322752 | 2018-04-25 12:58:23 -0400 | [diff] [blame] | 19 | static const char* apply_format_string(const char* format, va_list args, char* stackBuffer, |
| 20 | size_t stackBufferSize, int* length, SkString* heapBuffer) { |
| 21 | va_list argsCopy; |
| 22 | va_copy(argsCopy, args); |
| 23 | *length = std::vsnprintf(stackBuffer, stackBufferSize, format, args); |
| 24 | if (*length < 0) { |
| 25 | SkDebugf("SkString: vsnprintf reported error."); |
| 26 | va_end(argsCopy); |
| 27 | *length = 0; |
| 28 | return stackBuffer; |
| 29 | } |
| 30 | if (*length < SkToInt(stackBufferSize)) { |
| 31 | va_end(argsCopy); |
| 32 | return stackBuffer; |
| 33 | } |
| 34 | heapBuffer->resize(*length); |
| 35 | SkDEBUGCODE(int check =) |
| 36 | std::vsnprintf(heapBuffer->writable_str(), *length + 1, format, argsCopy); |
| 37 | SkASSERT(check == *length); |
| 38 | va_end(argsCopy); |
| 39 | return heapBuffer->c_str(); |
| 40 | } |
| 41 | |
| 42 | #define ARGS_TO_BUFFER(format, buffer, size, written, result) \ |
| 43 | SkString overflow; \ |
| 44 | do { \ |
| 45 | va_list args; \ |
| 46 | va_start(args, format); \ |
| 47 | result = apply_format_string(format, args, buffer, size, &written, &overflow); \ |
| 48 | va_end(args); \ |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 49 | } while (0) |
| 50 | |
Brian Salomon | 4322752 | 2018-04-25 12:58:23 -0400 | [diff] [blame] | 51 | #define V_SKSTRING_PRINTF(output, format) \ |
| 52 | do { \ |
| 53 | char buffer[kBufferSize]; \ |
| 54 | va_list args; \ |
| 55 | va_start(args, format); \ |
| 56 | int length; \ |
| 57 | auto result = apply_format_string(format, args, buffer, kBufferSize, &length, &output); \ |
| 58 | SkASSERT(result == output.c_str() || result == buffer); \ |
| 59 | if (result == buffer) { \ |
| 60 | output.set(buffer, length); \ |
| 61 | } \ |
| 62 | } while (0) |
halcanary | d51bdae | 2016-04-25 09:25:35 -0700 | [diff] [blame] | 63 | |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 64 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 65 | |
epoger@google.com | e8ebeb1 | 2012-10-29 16:42:11 +0000 | [diff] [blame] | 66 | bool SkStrEndsWith(const char string[], const char suffixStr[]) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 67 | SkASSERT(string); |
epoger@google.com | e8ebeb1 | 2012-10-29 16:42:11 +0000 | [diff] [blame] | 68 | SkASSERT(suffixStr); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 69 | size_t strLen = strlen(string); |
epoger@google.com | e8ebeb1 | 2012-10-29 16:42:11 +0000 | [diff] [blame] | 70 | size_t suffixLen = strlen(suffixStr); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 71 | return strLen >= suffixLen && |
epoger@google.com | e8ebeb1 | 2012-10-29 16:42:11 +0000 | [diff] [blame] | 72 | !strncmp(string + strLen - suffixLen, suffixStr, suffixLen); |
| 73 | } |
| 74 | |
| 75 | bool SkStrEndsWith(const char string[], const char suffixChar) { |
| 76 | SkASSERT(string); |
| 77 | size_t strLen = strlen(string); |
| 78 | if (0 == strLen) { |
| 79 | return false; |
| 80 | } else { |
| 81 | return (suffixChar == string[strLen-1]); |
| 82 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 83 | } |
| 84 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 85 | int SkStrStartsWithOneOf(const char string[], const char prefixes[]) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 86 | int index = 0; |
| 87 | do { |
| 88 | const char* limit = strchr(prefixes, '\0'); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 89 | if (!strncmp(string, prefixes, limit - prefixes)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 90 | return index; |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 91 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 92 | prefixes = limit + 1; |
| 93 | index++; |
| 94 | } while (prefixes[0]); |
| 95 | return -1; |
| 96 | } |
| 97 | |
epoger@google.com | d88a3d8 | 2013-06-19 18:27:20 +0000 | [diff] [blame] | 98 | char* SkStrAppendU32(char string[], uint32_t dec) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 99 | SkDEBUGCODE(char* start = string;) |
| 100 | |
epoger@google.com | d88a3d8 | 2013-06-19 18:27:20 +0000 | [diff] [blame] | 101 | char buffer[SkStrAppendU32_MaxSize]; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 102 | char* p = buffer + sizeof(buffer); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 103 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 104 | do { |
| 105 | *--p = SkToU8('0' + dec % 10); |
| 106 | dec /= 10; |
| 107 | } while (dec != 0); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 108 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 109 | SkASSERT(p >= buffer); |
| 110 | char* stop = buffer + sizeof(buffer); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 111 | while (p < stop) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 112 | *string++ = *p++; |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 113 | } |
epoger@google.com | d88a3d8 | 2013-06-19 18:27:20 +0000 | [diff] [blame] | 114 | SkASSERT(string - start <= SkStrAppendU32_MaxSize); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 115 | return string; |
| 116 | } |
| 117 | |
epoger@google.com | d88a3d8 | 2013-06-19 18:27:20 +0000 | [diff] [blame] | 118 | char* SkStrAppendS32(char string[], int32_t dec) { |
mtklein | 225fb98 | 2014-11-05 11:35:21 -0800 | [diff] [blame] | 119 | uint32_t udec = dec; |
vandebo@chromium.org | d877fdb | 2010-10-12 23:08:13 +0000 | [diff] [blame] | 120 | if (dec < 0) { |
epoger@google.com | d88a3d8 | 2013-06-19 18:27:20 +0000 | [diff] [blame] | 121 | *string++ = '-'; |
mtklein | 225fb98 | 2014-11-05 11:35:21 -0800 | [diff] [blame] | 122 | udec = ~udec + 1; // udec = -udec, but silences some warnings that are trying to be helpful |
vandebo@chromium.org | d877fdb | 2010-10-12 23:08:13 +0000 | [diff] [blame] | 123 | } |
mtklein | 225fb98 | 2014-11-05 11:35:21 -0800 | [diff] [blame] | 124 | return SkStrAppendU32(string, udec); |
epoger@google.com | d88a3d8 | 2013-06-19 18:27:20 +0000 | [diff] [blame] | 125 | } |
| 126 | |
| 127 | char* SkStrAppendU64(char string[], uint64_t dec, int minDigits) { |
| 128 | SkDEBUGCODE(char* start = string;) |
| 129 | |
| 130 | char buffer[SkStrAppendU64_MaxSize]; |
| 131 | char* p = buffer + sizeof(buffer); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 132 | |
vandebo@chromium.org | d877fdb | 2010-10-12 23:08:13 +0000 | [diff] [blame] | 133 | do { |
caryclark@google.com | 803eceb | 2012-06-06 12:09:34 +0000 | [diff] [blame] | 134 | *--p = SkToU8('0' + (int32_t) (dec % 10)); |
vandebo@chromium.org | d877fdb | 2010-10-12 23:08:13 +0000 | [diff] [blame] | 135 | dec /= 10; |
| 136 | minDigits--; |
| 137 | } while (dec != 0); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 138 | |
vandebo@chromium.org | d877fdb | 2010-10-12 23:08:13 +0000 | [diff] [blame] | 139 | while (minDigits > 0) { |
| 140 | *--p = '0'; |
| 141 | minDigits--; |
| 142 | } |
vandebo@chromium.org | d877fdb | 2010-10-12 23:08:13 +0000 | [diff] [blame] | 143 | |
| 144 | SkASSERT(p >= buffer); |
| 145 | size_t cp_len = buffer + sizeof(buffer) - p; |
| 146 | memcpy(string, p, cp_len); |
| 147 | string += cp_len; |
| 148 | |
epoger@google.com | d88a3d8 | 2013-06-19 18:27:20 +0000 | [diff] [blame] | 149 | SkASSERT(string - start <= SkStrAppendU64_MaxSize); |
vandebo@chromium.org | d877fdb | 2010-10-12 23:08:13 +0000 | [diff] [blame] | 150 | return string; |
| 151 | } |
| 152 | |
epoger@google.com | d88a3d8 | 2013-06-19 18:27:20 +0000 | [diff] [blame] | 153 | char* SkStrAppendS64(char string[], int64_t dec, int minDigits) { |
mtklein | 225fb98 | 2014-11-05 11:35:21 -0800 | [diff] [blame] | 154 | uint64_t udec = dec; |
epoger@google.com | d88a3d8 | 2013-06-19 18:27:20 +0000 | [diff] [blame] | 155 | if (dec < 0) { |
| 156 | *string++ = '-'; |
mtklein | 225fb98 | 2014-11-05 11:35:21 -0800 | [diff] [blame] | 157 | udec = ~udec + 1; // udec = -udec, but silences some warnings that are trying to be helpful |
epoger@google.com | d88a3d8 | 2013-06-19 18:27:20 +0000 | [diff] [blame] | 158 | } |
mtklein | 225fb98 | 2014-11-05 11:35:21 -0800 | [diff] [blame] | 159 | return SkStrAppendU64(string, udec, minDigits); |
epoger@google.com | d88a3d8 | 2013-06-19 18:27:20 +0000 | [diff] [blame] | 160 | } |
| 161 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 162 | char* SkStrAppendFloat(char string[], float value) { |
reed@google.com | 8072e4f | 2011-03-01 15:44:08 +0000 | [diff] [blame] | 163 | // since floats have at most 8 significant digits, we limit our %g to that. |
| 164 | static const char gFormat[] = "%.8g"; |
| 165 | // make it 1 larger for the terminating 0 |
| 166 | char buffer[SkStrAppendScalar_MaxSize + 1]; |
Hal Canary | 09f818d | 2018-02-22 15:12:46 -0500 | [diff] [blame] | 167 | int len = snprintf(buffer, sizeof(buffer), gFormat, value); |
reed@google.com | 8072e4f | 2011-03-01 15:44:08 +0000 | [diff] [blame] | 168 | memcpy(string, buffer, len); |
vandebo@chromium.org | 677cbed | 2011-03-03 18:20:12 +0000 | [diff] [blame] | 169 | SkASSERT(len <= SkStrAppendScalar_MaxSize); |
reed@google.com | 8072e4f | 2011-03-01 15:44:08 +0000 | [diff] [blame] | 170 | return string + len; |
vandebo@chromium.org | 677cbed | 2011-03-03 18:20:12 +0000 | [diff] [blame] | 171 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 172 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 173 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 174 | |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 175 | const SkString::Rec SkString::gEmptyRec(0, 0); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 176 | |
| 177 | #define SizeOfRec() (gEmptyRec.data() - (const char*)&gEmptyRec) |
| 178 | |
reed@google.com | 8cb1088 | 2013-06-04 20:36:52 +0000 | [diff] [blame] | 179 | static uint32_t trim_size_t_to_u32(size_t value) { |
| 180 | if (sizeof(size_t) > sizeof(uint32_t)) { |
Hal Canary | e1bc7de | 2018-06-13 15:01:39 -0400 | [diff] [blame] | 181 | if (value > UINT32_MAX) { |
| 182 | value = UINT32_MAX; |
reed@google.com | 8cb1088 | 2013-06-04 20:36:52 +0000 | [diff] [blame] | 183 | } |
| 184 | } |
| 185 | return (uint32_t)value; |
| 186 | } |
| 187 | |
| 188 | static size_t check_add32(size_t base, size_t extra) { |
Hal Canary | e1bc7de | 2018-06-13 15:01:39 -0400 | [diff] [blame] | 189 | SkASSERT(base <= UINT32_MAX); |
reed@google.com | 8cb1088 | 2013-06-04 20:36:52 +0000 | [diff] [blame] | 190 | if (sizeof(size_t) > sizeof(uint32_t)) { |
Hal Canary | e1bc7de | 2018-06-13 15:01:39 -0400 | [diff] [blame] | 191 | if (base + extra > UINT32_MAX) { |
| 192 | extra = UINT32_MAX - base; |
reed@google.com | 8cb1088 | 2013-06-04 20:36:52 +0000 | [diff] [blame] | 193 | } |
| 194 | } |
| 195 | return extra; |
| 196 | } |
| 197 | |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 198 | sk_sp<SkString::Rec> SkString::Rec::Make(const char text[], size_t len) { |
reed@google.com | 4bce115 | 2011-09-14 16:13:58 +0000 | [diff] [blame] | 199 | if (0 == len) { |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 200 | return sk_sp<SkString::Rec>(const_cast<Rec*>(&gEmptyRec)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 201 | } |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 202 | |
Mike Reed | 33f38b0 | 2018-02-14 13:58:06 -0500 | [diff] [blame] | 203 | SkSafeMath safe; |
| 204 | // We store a 32bit version of the length |
| 205 | uint32_t stringLen = safe.castTo<uint32_t>(len); |
| 206 | // Add SizeOfRec() for our overhead and 1 for null-termination |
| 207 | size_t allocationSize = safe.add(len, SizeOfRec() + sizeof(char)); |
| 208 | // Align up to a multiple of 4 |
| 209 | allocationSize = safe.alignUp(allocationSize, 4); |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 210 | |
Mike Reed | 33f38b0 | 2018-02-14 13:58:06 -0500 | [diff] [blame] | 211 | SkASSERT_RELEASE(safe.ok()); |
| 212 | |
| 213 | void* storage = ::operator new (allocationSize); |
| 214 | sk_sp<Rec> rec(new (storage) Rec(stringLen, 1)); |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 215 | if (text) { |
| 216 | memcpy(rec->data(), text, len); |
| 217 | } |
| 218 | rec->data()[len] = 0; |
Robert Phillips | 01f8e41 | 2017-10-05 11:28:20 +0000 | [diff] [blame] | 219 | return rec; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 220 | } |
| 221 | |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 222 | void SkString::Rec::ref() const { |
| 223 | if (this == &SkString::gEmptyRec) { |
| 224 | return; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 225 | } |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 226 | SkAssertResult(this->fRefCnt.fetch_add(+1, std::memory_order_relaxed)); |
| 227 | } |
| 228 | |
| 229 | void SkString::Rec::unref() const { |
| 230 | if (this == &SkString::gEmptyRec) { |
| 231 | return; |
| 232 | } |
| 233 | int32_t oldRefCnt = this->fRefCnt.fetch_add(-1, std::memory_order_acq_rel); |
| 234 | SkASSERT(oldRefCnt); |
| 235 | if (1 == oldRefCnt) { |
| 236 | delete this; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | bool SkString::Rec::unique() const { |
| 241 | return fRefCnt.load(std::memory_order_acquire) == 1; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | #ifdef SK_DEBUG |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 245 | void SkString::validate() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 246 | // make sure know one has written over our global |
reed@google.com | 4bce115 | 2011-09-14 16:13:58 +0000 | [diff] [blame] | 247 | SkASSERT(0 == gEmptyRec.fLength); |
Ben Wagner | af89366 | 2017-10-03 11:08:14 -0400 | [diff] [blame] | 248 | SkASSERT(0 == gEmptyRec.fRefCnt.load(std::memory_order_relaxed)); |
reed@google.com | 4bce115 | 2011-09-14 16:13:58 +0000 | [diff] [blame] | 249 | SkASSERT(0 == gEmptyRec.data()[0]); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 250 | |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 251 | if (fRec.get() != &gEmptyRec) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 252 | SkASSERT(fRec->fLength > 0); |
Ben Wagner | af89366 | 2017-10-03 11:08:14 -0400 | [diff] [blame] | 253 | SkASSERT(fRec->fRefCnt.load(std::memory_order_relaxed) > 0); |
reed@google.com | 4bce115 | 2011-09-14 16:13:58 +0000 | [diff] [blame] | 254 | SkASSERT(0 == fRec->data()[fRec->fLength]); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 255 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 256 | } |
| 257 | #endif |
| 258 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 259 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 260 | |
| 261 | SkString::SkString() : fRec(const_cast<Rec*>(&gEmptyRec)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 262 | } |
| 263 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 264 | SkString::SkString(size_t len) { |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 265 | fRec = Rec::Make(nullptr, len); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 266 | } |
| 267 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 268 | SkString::SkString(const char text[]) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 269 | size_t len = text ? strlen(text) : 0; |
| 270 | |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 271 | fRec = Rec::Make(text, len); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 272 | } |
| 273 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 274 | SkString::SkString(const char text[], size_t len) { |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 275 | fRec = Rec::Make(text, len); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 276 | } |
| 277 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 278 | SkString::SkString(const SkString& src) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 279 | src.validate(); |
| 280 | |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 281 | fRec = src.fRec; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 282 | } |
| 283 | |
bungeman | 9d55297 | 2016-02-07 18:42:54 -0800 | [diff] [blame] | 284 | SkString::SkString(SkString&& src) { |
| 285 | src.validate(); |
| 286 | |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 287 | fRec = std::move(src.fRec); |
| 288 | src.fRec.reset(const_cast<Rec*>(&gEmptyRec)); |
bungeman | 9d55297 | 2016-02-07 18:42:54 -0800 | [diff] [blame] | 289 | } |
| 290 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 291 | SkString::~SkString() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 292 | this->validate(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 293 | } |
| 294 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 295 | bool SkString::equals(const SkString& src) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 296 | return fRec == src.fRec || this->equals(src.c_str(), src.size()); |
| 297 | } |
| 298 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 299 | bool SkString::equals(const char text[]) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 300 | return this->equals(text, text ? strlen(text) : 0); |
| 301 | } |
| 302 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 303 | bool SkString::equals(const char text[], size_t len) const { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 304 | SkASSERT(len == 0 || text != nullptr); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 305 | |
| 306 | return fRec->fLength == len && !memcmp(fRec->data(), text, len); |
| 307 | } |
| 308 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 309 | SkString& SkString::operator=(const SkString& src) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 310 | this->validate(); |
| 311 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 312 | if (fRec != src.fRec) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 313 | SkString tmp(src); |
| 314 | this->swap(tmp); |
| 315 | } |
| 316 | return *this; |
| 317 | } |
| 318 | |
bungeman | 9d55297 | 2016-02-07 18:42:54 -0800 | [diff] [blame] | 319 | SkString& SkString::operator=(SkString&& src) { |
| 320 | this->validate(); |
| 321 | |
| 322 | if (fRec != src.fRec) { |
| 323 | this->swap(src); |
| 324 | } |
| 325 | return *this; |
| 326 | } |
| 327 | |
bsalomon@google.com | fc29629 | 2011-05-06 13:53:47 +0000 | [diff] [blame] | 328 | SkString& SkString::operator=(const char text[]) { |
| 329 | this->validate(); |
| 330 | |
| 331 | SkString tmp(text); |
| 332 | this->swap(tmp); |
| 333 | |
| 334 | return *this; |
| 335 | } |
| 336 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 337 | void SkString::reset() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 338 | this->validate(); |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 339 | fRec.reset(const_cast<Rec*>(&gEmptyRec)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 340 | } |
| 341 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 342 | char* SkString::writable_str() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 343 | this->validate(); |
| 344 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 345 | if (fRec->fLength) { |
Ben Wagner | af89366 | 2017-10-03 11:08:14 -0400 | [diff] [blame] | 346 | if (!fRec->unique()) { |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 347 | fRec = Rec::Make(fRec->data(), fRec->fLength); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 348 | } |
| 349 | } |
| 350 | return fRec->data(); |
| 351 | } |
| 352 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 353 | void SkString::set(const char text[]) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 354 | this->set(text, text ? strlen(text) : 0); |
| 355 | } |
| 356 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 357 | void SkString::set(const char text[], size_t len) { |
reed@google.com | 8cb1088 | 2013-06-04 20:36:52 +0000 | [diff] [blame] | 358 | len = trim_size_t_to_u32(len); |
Ben Wagner | af89366 | 2017-10-03 11:08:14 -0400 | [diff] [blame] | 359 | bool unique = fRec->unique(); |
reed@google.com | 4bce115 | 2011-09-14 16:13:58 +0000 | [diff] [blame] | 360 | if (0 == len) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 361 | this->reset(); |
Ben Wagner | af89366 | 2017-10-03 11:08:14 -0400 | [diff] [blame] | 362 | } else if (unique && len <= fRec->fLength) { |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 363 | // should we resize if len <<<< fLength, to save RAM? (e.g. len < (fLength>>1))? |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 364 | // just use less of the buffer without allocating a smaller one |
| 365 | char* p = this->writable_str(); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 366 | if (text) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 367 | memcpy(p, text, len); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 368 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 369 | p[len] = 0; |
reed@google.com | 8cb1088 | 2013-06-04 20:36:52 +0000 | [diff] [blame] | 370 | fRec->fLength = SkToU32(len); |
Ben Wagner | af89366 | 2017-10-03 11:08:14 -0400 | [diff] [blame] | 371 | } else if (unique && (fRec->fLength >> 2) == (len >> 2)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 372 | // we have spare room in the current allocation, so don't alloc a larger one |
| 373 | char* p = this->writable_str(); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 374 | if (text) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 375 | memcpy(p, text, len); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 376 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 377 | p[len] = 0; |
reed@google.com | 8cb1088 | 2013-06-04 20:36:52 +0000 | [diff] [blame] | 378 | fRec->fLength = SkToU32(len); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 379 | } else { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 380 | SkString tmp(text, len); |
| 381 | this->swap(tmp); |
| 382 | } |
| 383 | } |
| 384 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 385 | void SkString::insert(size_t offset, const char text[]) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 386 | this->insert(offset, text, text ? strlen(text) : 0); |
| 387 | } |
| 388 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 389 | void SkString::insert(size_t offset, const char text[], size_t len) { |
| 390 | if (len) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 391 | size_t length = fRec->fLength; |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 392 | if (offset > length) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 393 | offset = length; |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 394 | } |
skia.committer@gmail.com | 8f6ef40 | 2013-06-05 07:01:06 +0000 | [diff] [blame] | 395 | |
reed@google.com | 8cb1088 | 2013-06-04 20:36:52 +0000 | [diff] [blame] | 396 | // Check if length + len exceeds 32bits, we trim len |
| 397 | len = check_add32(length, len); |
| 398 | if (0 == len) { |
| 399 | return; |
| 400 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 401 | |
| 402 | /* If we're the only owner, and we have room in our allocation for the insert, |
| 403 | do it in place, rather than allocating a new buffer. |
| 404 | |
| 405 | To know we have room, compare the allocated sizes |
| 406 | beforeAlloc = SkAlign4(length + 1) |
| 407 | afterAlloc = SkAligh4(length + 1 + len) |
| 408 | but SkAlign4(x) is (x + 3) >> 2 << 2 |
| 409 | which is equivalent for testing to (length + 1 + 3) >> 2 == (length + 1 + 3 + len) >> 2 |
| 410 | and we can then eliminate the +1+3 since that doesn't affec the answer |
| 411 | */ |
Ben Wagner | af89366 | 2017-10-03 11:08:14 -0400 | [diff] [blame] | 412 | if (fRec->unique() && (length >> 2) == ((length + len) >> 2)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 413 | char* dst = this->writable_str(); |
| 414 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 415 | if (offset < length) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 416 | memmove(dst + offset + len, dst + offset, length - offset); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 417 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 418 | memcpy(dst + offset, text, len); |
| 419 | |
| 420 | dst[length + len] = 0; |
reed@google.com | 8cb1088 | 2013-06-04 20:36:52 +0000 | [diff] [blame] | 421 | fRec->fLength = SkToU32(length + len); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 422 | } else { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 423 | /* Seems we should use realloc here, since that is safe if it fails |
| 424 | (we have the original data), and might be faster than alloc/copy/free. |
| 425 | */ |
| 426 | SkString tmp(fRec->fLength + len); |
| 427 | char* dst = tmp.writable_str(); |
| 428 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 429 | if (offset > 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 430 | memcpy(dst, fRec->data(), offset); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 431 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 432 | memcpy(dst + offset, text, len); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 433 | if (offset < fRec->fLength) { |
| 434 | memcpy(dst + offset + len, fRec->data() + offset, |
| 435 | fRec->fLength - offset); |
| 436 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 437 | |
| 438 | this->swap(tmp); |
| 439 | } |
| 440 | } |
| 441 | } |
| 442 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 443 | void SkString::insertUnichar(size_t offset, SkUnichar uni) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 444 | char buffer[kMaxBytesInUTF8Sequence]; |
| 445 | size_t len = SkUTF8_FromUnichar(uni, buffer); |
| 446 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 447 | if (len) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 448 | this->insert(offset, buffer, len); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 449 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 450 | } |
| 451 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 452 | void SkString::insertS32(size_t offset, int32_t dec) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 453 | char buffer[SkStrAppendS32_MaxSize]; |
| 454 | char* stop = SkStrAppendS32(buffer, dec); |
| 455 | this->insert(offset, buffer, stop - buffer); |
| 456 | } |
| 457 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 458 | void SkString::insertS64(size_t offset, int64_t dec, int minDigits) { |
vandebo@chromium.org | d877fdb | 2010-10-12 23:08:13 +0000 | [diff] [blame] | 459 | char buffer[SkStrAppendS64_MaxSize]; |
| 460 | char* stop = SkStrAppendS64(buffer, dec, minDigits); |
| 461 | this->insert(offset, buffer, stop - buffer); |
| 462 | } |
| 463 | |
epoger@google.com | d88a3d8 | 2013-06-19 18:27:20 +0000 | [diff] [blame] | 464 | void SkString::insertU32(size_t offset, uint32_t dec) { |
| 465 | char buffer[SkStrAppendU32_MaxSize]; |
| 466 | char* stop = SkStrAppendU32(buffer, dec); |
| 467 | this->insert(offset, buffer, stop - buffer); |
| 468 | } |
| 469 | |
| 470 | void SkString::insertU64(size_t offset, uint64_t dec, int minDigits) { |
| 471 | char buffer[SkStrAppendU64_MaxSize]; |
| 472 | char* stop = SkStrAppendU64(buffer, dec, minDigits); |
| 473 | this->insert(offset, buffer, stop - buffer); |
| 474 | } |
| 475 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 476 | void SkString::insertHex(size_t offset, uint32_t hex, int minDigits) { |
bungeman | 62ce030 | 2015-08-28 09:09:32 -0700 | [diff] [blame] | 477 | minDigits = SkTPin(minDigits, 0, 8); |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 478 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 479 | char buffer[8]; |
| 480 | char* p = buffer + sizeof(buffer); |
| 481 | |
| 482 | do { |
Hal Canary | d6e6e66 | 2017-06-17 10:38:13 -0400 | [diff] [blame] | 483 | *--p = SkHexadecimalDigits::gUpper[hex & 0xF]; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 484 | hex >>= 4; |
| 485 | minDigits -= 1; |
| 486 | } while (hex != 0); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 487 | |
| 488 | while (--minDigits >= 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 489 | *--p = '0'; |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 490 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 491 | |
| 492 | SkASSERT(p >= buffer); |
| 493 | this->insert(offset, p, buffer + sizeof(buffer) - p); |
| 494 | } |
| 495 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 496 | void SkString::insertScalar(size_t offset, SkScalar value) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 497 | char buffer[SkStrAppendScalar_MaxSize]; |
| 498 | char* stop = SkStrAppendScalar(buffer, value); |
| 499 | this->insert(offset, buffer, stop - buffer); |
| 500 | } |
| 501 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 502 | void SkString::printf(const char format[], ...) { |
halcanary | d51bdae | 2016-04-25 09:25:35 -0700 | [diff] [blame] | 503 | V_SKSTRING_PRINTF((*this), format); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 504 | } |
| 505 | |
| 506 | void SkString::appendf(const char format[], ...) { |
Brian Salomon | 4322752 | 2018-04-25 12:58:23 -0400 | [diff] [blame] | 507 | char buffer[kBufferSize]; |
joshualitt | 976386b | 2014-10-23 18:23:32 -0700 | [diff] [blame] | 508 | int length; |
Brian Salomon | 4322752 | 2018-04-25 12:58:23 -0400 | [diff] [blame] | 509 | const char* result; |
| 510 | ARGS_TO_BUFFER(format, buffer, kBufferSize, length, result); |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 511 | |
Brian Salomon | 4322752 | 2018-04-25 12:58:23 -0400 | [diff] [blame] | 512 | this->append(result, length); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 513 | } |
| 514 | |
commit-bot@chromium.org | ce0e4ef | 2013-11-21 17:20:17 +0000 | [diff] [blame] | 515 | void SkString::appendVAList(const char format[], va_list args) { |
Brian Salomon | 4322752 | 2018-04-25 12:58:23 -0400 | [diff] [blame] | 516 | char buffer[kBufferSize]; |
Hal Canary | 09f818d | 2018-02-22 15:12:46 -0500 | [diff] [blame] | 517 | int length = vsnprintf(buffer, kBufferSize, format, args); |
joshualitt | 976386b | 2014-10-23 18:23:32 -0700 | [diff] [blame] | 518 | SkASSERT(length >= 0 && length < SkToInt(kBufferSize)); |
bsalomon@google.com | f910d3b | 2013-03-07 17:06:57 +0000 | [diff] [blame] | 519 | |
joshualitt | 976386b | 2014-10-23 18:23:32 -0700 | [diff] [blame] | 520 | this->append(buffer, length); |
bsalomon@google.com | f910d3b | 2013-03-07 17:06:57 +0000 | [diff] [blame] | 521 | } |
| 522 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 523 | void SkString::prependf(const char format[], ...) { |
Brian Salomon | 4322752 | 2018-04-25 12:58:23 -0400 | [diff] [blame] | 524 | char buffer[kBufferSize]; |
joshualitt | 976386b | 2014-10-23 18:23:32 -0700 | [diff] [blame] | 525 | int length; |
Brian Salomon | 4322752 | 2018-04-25 12:58:23 -0400 | [diff] [blame] | 526 | const char* result; |
| 527 | ARGS_TO_BUFFER(format, buffer, kBufferSize, length, result); |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 528 | |
Brian Salomon | 4322752 | 2018-04-25 12:58:23 -0400 | [diff] [blame] | 529 | this->prepend(result, length); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 530 | } |
| 531 | |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 532 | void SkString::prependVAList(const char format[], va_list args) { |
Brian Salomon | 4322752 | 2018-04-25 12:58:23 -0400 | [diff] [blame] | 533 | char buffer[kBufferSize]; |
Hal Canary | 09f818d | 2018-02-22 15:12:46 -0500 | [diff] [blame] | 534 | int length = vsnprintf(buffer, kBufferSize, format, args); |
joshualitt | 976386b | 2014-10-23 18:23:32 -0700 | [diff] [blame] | 535 | SkASSERT(length >= 0 && length < SkToInt(kBufferSize)); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 536 | |
joshualitt | 976386b | 2014-10-23 18:23:32 -0700 | [diff] [blame] | 537 | this->prepend(buffer, length); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 538 | } |
| 539 | |
| 540 | |
reed@google.com | fa06e52 | 2011-02-28 21:29:58 +0000 | [diff] [blame] | 541 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 542 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 543 | void SkString::remove(size_t offset, size_t length) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 544 | size_t size = this->size(); |
| 545 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 546 | if (offset < size) { |
bungeman | dfb9bc4 | 2014-08-11 07:19:56 -0700 | [diff] [blame] | 547 | if (length > size - offset) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 548 | length = size - offset; |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 549 | } |
bungeman | dfb9bc4 | 2014-08-11 07:19:56 -0700 | [diff] [blame] | 550 | SkASSERT(length <= size); |
| 551 | SkASSERT(offset <= size - length); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 552 | if (length > 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 553 | SkString tmp(size - length); |
| 554 | char* dst = tmp.writable_str(); |
| 555 | const char* src = this->c_str(); |
| 556 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 557 | if (offset) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 558 | memcpy(dst, src, offset); |
| 559 | } |
bungeman | dfb9bc4 | 2014-08-11 07:19:56 -0700 | [diff] [blame] | 560 | size_t tail = size - (offset + length); |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 561 | if (tail) { |
bungeman | dfb9bc4 | 2014-08-11 07:19:56 -0700 | [diff] [blame] | 562 | memcpy(dst + offset, src + (offset + length), tail); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 563 | } |
| 564 | SkASSERT(dst[tmp.size()] == 0); |
| 565 | this->swap(tmp); |
| 566 | } |
| 567 | } |
| 568 | } |
| 569 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 570 | void SkString::swap(SkString& other) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 571 | this->validate(); |
| 572 | other.validate(); |
| 573 | |
Ben Wagner | eccda1c | 2017-10-05 10:13:51 -0400 | [diff] [blame] | 574 | SkTSwap(fRec, other.fRec); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 575 | } |
| 576 | |
mike@reedtribe.org | 4e1d3ac | 2011-04-10 01:04:37 +0000 | [diff] [blame] | 577 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 578 | |
tomhudson@google.com | 3a1f6a0 | 2011-06-30 14:39:52 +0000 | [diff] [blame] | 579 | SkString SkStringPrintf(const char* format, ...) { |
| 580 | SkString formattedOutput; |
halcanary | d51bdae | 2016-04-25 09:25:35 -0700 | [diff] [blame] | 581 | V_SKSTRING_PRINTF(formattedOutput, format); |
tomhudson@google.com | 3a1f6a0 | 2011-06-30 14:39:52 +0000 | [diff] [blame] | 582 | return formattedOutput; |
| 583 | } |
| 584 | |
kkinnunen | 3e980c3 | 2015-12-23 01:33:00 -0800 | [diff] [blame] | 585 | void SkStrSplit(const char* str, const char* delimiters, SkStrSplitMode splitMode, |
| 586 | SkTArray<SkString>* out) { |
| 587 | if (splitMode == kCoalesce_SkStrSplitMode) { |
rmistry | 0f515bd | 2015-12-22 10:22:26 -0800 | [diff] [blame] | 588 | // Skip any delimiters. |
| 589 | str += strspn(str, delimiters); |
kkinnunen | 9ebc3f0 | 2015-12-21 23:48:13 -0800 | [diff] [blame] | 590 | } |
kkinnunen | 3e980c3 | 2015-12-23 01:33:00 -0800 | [diff] [blame] | 591 | if (!*str) { |
| 592 | return; |
| 593 | } |
| 594 | |
| 595 | while (true) { |
| 596 | // Find a token. |
| 597 | const size_t len = strcspn(str, delimiters); |
| 598 | if (splitMode == kStrict_SkStrSplitMode || len > 0) { |
| 599 | out->push_back().set(str, len); |
| 600 | str += len; |
| 601 | } |
| 602 | |
| 603 | if (!*str) { |
| 604 | return; |
| 605 | } |
| 606 | if (splitMode == kCoalesce_SkStrSplitMode) { |
| 607 | // Skip any delimiters. |
| 608 | str += strspn(str, delimiters); |
| 609 | } else { |
| 610 | // Skip one delimiter. |
| 611 | str += 1; |
| 612 | } |
| 613 | } |
rmistry@google.com | d6bab02 | 2013-12-02 13:50:38 +0000 | [diff] [blame] | 614 | } |