Revert "Cleanup: Remove unused CFX_PSRenderer and various encoders it used."

core/src/fxcodec/codec/fx_codec.cpp

 
 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/include/fxcodec/fx_codec.h"
 
 #include <cmath>
@@ skipping 124 matching lines @@
   }
 
   nonstd::unique_ptr<ImageDataCache> cache(
       new ImageDataCache(m_OutputWidth, m_OutputHeight, m_Pitch));
   if (!cache->AllocateCache())
     return;
 
   m_pDataCache = nonstd::move(cache);
 }
 
+FX_BOOL CCodec_BasicModule::RunLengthEncode(const uint8_t* src_buf,
+                                            FX_DWORD src_size,
+                                            uint8_t*& dest_buf,
+                                            FX_DWORD& dest_size) {
+  return FALSE;
+}
+
+#define EXPONENT_DETECT(ptr)                 \
+  for (;; ptr++) {                           \
+    if (!std::isdigit(*ptr)) {               \
+      if (endptr)                            \
+        *endptr = (char*)ptr;                \
+      break;                                 \
+    } else {                                 \
+      exp_ret *= 10;                         \
+      exp_ret += FXSYS_toDecimalDigit(*ptr); \
+      continue;                              \
+    }                                        \
+  }
+
+extern "C" double FXstrtod(const char* nptr, char** endptr) {
+  double ret = 0.0;
+  const char* ptr = nptr;
+  const char* exp_ptr = NULL;
+  int e_number = 0, e_signal = 0, e_point = 0, is_negative = 0;
+  int exp_ret = 0, exp_sig = 1, fra_ret = 0, fra_count = 0, fra_base = 1;
+  if (!nptr) {
+    return 0.0;
+  }
+  for (;; ptr++) {
+    if (!e_number && !e_point && (*ptr == '\t' || *ptr == ' '))
+      continue;
+
+    if (std::isdigit(*ptr)) {
+      if (!e_number)
+        e_number = 1;
+
+      if (!e_point) {
+        ret *= 10;
+        ret += FXSYS_toDecimalDigit(*ptr);
+      } else {
+        fra_count++;
+        fra_ret *= 10;
+        fra_ret += FXSYS_toDecimalDigit(*ptr);
+      }
+      continue;
+    }
+    if (!e_point && *ptr == '.') {
+      e_point = 1;
+      continue;
+    }
+    if (!e_number && !e_point && !e_signal) {
+      switch (*ptr) {
+        case '-':
+          is_negative = 1;
+        case '+':
+          e_signal = 1;
+          continue;
+      }
+    }
+    if (e_number && (*ptr == 'e' || *ptr == 'E')) {
+      exp_ptr = ptr++;
+      if (*ptr == '+' || *ptr == '-') {
+        exp_sig = (*ptr++ == '+') ? 1 : -1;
+        if (!std::isdigit(*ptr)) {
+          if (endptr) {
+            *endptr = (char*)exp_ptr;
+          }
+          break;
+        }
+        EXPONENT_DETECT(ptr);
+      } else if (std::isdigit(*ptr)) {
+        EXPONENT_DETECT(ptr);
+      } else {
+        if (endptr) {
+          *endptr = (char*)exp_ptr;
+        }
+        break;
+      }
+      break;
+    }
+    if (ptr != nptr && !e_number) {
+      if (endptr) {
+        *endptr = (char*)nptr;
+      }
+      break;
+    }
+    if (endptr) {
+      *endptr = (char*)ptr;
+    }
+    break;
+  }
+  while (fra_count--) {
+    fra_base *= 10;
+  }
+  ret += (double)fra_ret / (double)fra_base;
+  if (exp_sig == 1) {
+    while (exp_ret--) {
+      ret *= 10.0;
+    }
+  } else {
+    while (exp_ret--) {
+      ret /= 10.0;
+    }
+  }
+  return is_negative ? -ret : ret;
+}
+#undef EXPONENT_DETECT
+
+FX_BOOL CCodec_BasicModule::A85Encode(const uint8_t* src_buf,
+                                      FX_DWORD src_size,
+                                      uint8_t*& dest_buf,
+                                      FX_DWORD& dest_size) {
+  return FALSE;
+}
 class CCodec_RLScanlineDecoder : public CCodec_ScanlineDecoder {
  public:
   CCodec_RLScanlineDecoder();
   ~CCodec_RLScanlineDecoder() override;
 
   FX_BOOL Create(const uint8_t* src_buf,
                  FX_DWORD src_size,
                  int width,
                  int height,
                  int nComps,
@@ skipping 184 matching lines @@
     int nComps,
     int bpc) {
   CCodec_RLScanlineDecoder* pRLScanlineDecoder = new CCodec_RLScanlineDecoder;
   if (!pRLScanlineDecoder->Create(src_buf, src_size, width, height, nComps,
                                   bpc)) {
     delete pRLScanlineDecoder;
     return NULL;
   }
   return pRLScanlineDecoder;
 }