Mercurial > libpst
annotate src/vbuf.c @ 386:f1f9920cc7b1
Add AM_GNU_GETTEXT macros
AM_ICONV relies on config.rpath and autopoint/gettextize will
only copy these in when the AM_GNU_GETTEXT macros are present.
This is needed for the next commit that deletes config.rpath since
it is cruft that should be copied in by autotools not embedded.
Run autopoint to copy in config.rpath and
leave it to automake to copy into the tarball.
author | Paul Wise <pabs3@bonedaddy.net> |
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date | Sat, 21 Dec 2019 21:25:44 +0800 |
parents | 4fd5197aacc2 |
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rev | line source |
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73
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1 |
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2 #include "define.h" |
43 | 3 |
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4 static int unicode_up = 0; |
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5 static iconv_t i16to8; |
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6 static const char *target_charset = NULL; |
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7 static int target_open_from = 0; |
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8 static int target_open_to = 0; |
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9 static iconv_t i8totarget = (iconv_t)-1; |
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10 static iconv_t target2i8 = (iconv_t)-1; |
43 | 11 |
12 | |
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13 #define ASSERT(x,...) { if( !(x) ) DIE(( __VA_ARGS__)); } |
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14 |
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15 |
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16 /** DESTRUCTIVELY grow or shrink buffer |
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17 */ |
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18 static void pst_vbresize(pst_vbuf *vb, size_t len); |
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19 static void pst_vbresize(pst_vbuf *vb, size_t len) |
43 | 20 { |
182
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21 vb->dlen = 0; |
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22 |
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23 if (vb->blen >= len) { |
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24 vb->b = vb->buf; |
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25 return; |
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26 } |
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27 |
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28 vb->buf = realloc(vb->buf, len); |
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29 vb->b = vb->buf; |
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30 vb->blen = len; |
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31 } |
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32 |
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33 |
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34 static size_t pst_vbavail(pst_vbuf * vb); |
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35 static size_t pst_vbavail(pst_vbuf * vb) |
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36 { |
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37 return vb->blen - vb->dlen - (size_t)(vb->b - vb->buf); |
43 | 38 } |
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39 |
43 | 40 |
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41 static void open_targets(const char* charset); |
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42 static void open_targets(const char* charset) |
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43 { |
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44 if (!target_charset || strcasecmp(target_charset, charset)) { |
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45 if (target_open_from) iconv_close(i8totarget); |
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46 if (target_open_to) iconv_close(target2i8); |
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47 if (target_charset) free((char *)target_charset); |
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48 target_charset = strdup(charset); |
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49 target_open_from = 1; |
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50 target_open_to = 1; |
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51 i8totarget = iconv_open(target_charset, "utf-8"); |
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52 if (i8totarget == (iconv_t)-1) { |
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53 target_open_from = 0; |
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54 DEBUG_WARN(("Couldn't open iconv descriptor for utf-8 to %s.\n", target_charset)); |
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55 } |
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56 target2i8 = iconv_open("utf-8", target_charset); |
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57 if (target2i8 == (iconv_t)-1) { |
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58 target_open_to = 0; |
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59 DEBUG_WARN(("Couldn't open iconv descriptor for %s to utf-8.\n", target_charset)); |
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60 } |
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61 } |
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62 } |
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63 |
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64 |
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65 static size_t sbcs_conversion(pst_vbuf *dest, const char *inbuf, int iblen, iconv_t conversion); |
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66 static size_t sbcs_conversion(pst_vbuf *dest, const char *inbuf, int iblen, iconv_t conversion) |
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67 { |
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68 size_t inbytesleft = iblen; |
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69 size_t icresult = (size_t)-1; |
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70 size_t outbytesleft = 0; |
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71 char *outbuf = NULL; |
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72 int myerrno; |
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73 |
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74 DEBUG_ENT("sbcs_conversion"); |
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75 pst_vbresize(dest, 2*iblen); |
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76 |
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77 do { |
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78 outbytesleft = dest->blen - dest->dlen; |
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79 outbuf = dest->b + dest->dlen; |
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80 icresult = iconv(conversion, (ICONV_CONST char**)&inbuf, &inbytesleft, &outbuf, &outbytesleft); |
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81 myerrno = errno; |
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82 dest->dlen = outbuf - dest->b; |
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83 if (inbytesleft) pst_vbgrow(dest, 2*inbytesleft); |
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84 } while ((size_t)-1 == icresult && E2BIG == myerrno); |
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85 |
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86 if (icresult == (size_t)-1) { |
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87 DEBUG_WARN(("iconv failure: %s\n", strerror(myerrno))); |
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88 pst_unicode_init(); |
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89 DEBUG_RET(); |
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90 return (size_t)-1; |
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91 } |
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92 DEBUG_RET(); |
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93 return 0; |
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94 } |
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95 |
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96 |
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97 static void pst_unicode_close(); |
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98 static void pst_unicode_close() |
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99 { |
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100 iconv_close(i16to8); |
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101 if (target_open_from) iconv_close(i8totarget); |
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102 if (target_open_to) iconv_close(target2i8); |
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103 if (target_charset) free((char *)target_charset); |
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104 target_charset = NULL; |
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105 target_open_from = 0; |
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106 target_open_to = 0; |
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107 unicode_up = 0; |
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108 } |
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109 |
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110 |
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111 static int utf16_is_terminated(const char *str, int length); |
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112 static int utf16_is_terminated(const char *str, int length) |
43 | 113 { |
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114 int len = -1; |
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115 int i; |
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116 for (i = 0; i < length; i += 2) { |
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117 if (str[i] == 0 && str[i + 1] == 0) { |
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118 len = i; |
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119 } |
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120 } |
43 | 121 |
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122 if (len == -1) { |
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123 DEBUG_WARN(("utf16 string is not zero terminated\n")); |
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124 } |
43 | 125 |
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126 return (len == -1) ? 0 : 1; |
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127 } |
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128 |
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129 |
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130 pst_vbuf *pst_vballoc(size_t len) |
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131 { |
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132 pst_vbuf *result = pst_malloc(sizeof(pst_vbuf)); |
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133 if (result) { |
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134 result->dlen = 0; |
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135 result->blen = 0; |
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136 result->buf = NULL; |
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137 pst_vbresize(result, len); |
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138 } |
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139 else DIE(("malloc() failure")); |
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140 return result; |
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141 } |
43 | 142 |
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143 |
182
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144 /** out: vbavail(vb) >= len, data are preserved |
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145 */ |
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146 void pst_vbgrow(pst_vbuf *vb, size_t len) |
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147 { |
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148 if (0 == len) |
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149 return; |
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150 |
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151 if (0 == vb->blen) { |
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152 pst_vbresize(vb, len); |
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153 return; |
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154 } |
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155 |
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156 if (vb->dlen + len > vb->blen) { |
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157 if (vb->dlen + len < vb->blen * 1.5) |
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158 len = vb->blen * 1.5; |
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159 char *nb = pst_malloc(vb->blen + len); |
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160 if (!nb) DIE(("malloc() failure")); |
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161 vb->blen = vb->blen + len; |
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162 memcpy(nb, vb->b, vb->dlen); |
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163 |
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164 free(vb->buf); |
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165 vb->buf = nb; |
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166 vb->b = vb->buf; |
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167 } else { |
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168 if (vb->b != vb->buf) |
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169 memcpy(vb->buf, vb->b, vb->dlen); |
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170 } |
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171 |
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172 vb->b = vb->buf; |
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173 |
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174 ASSERT(pst_vbavail(vb) >= len, "vbgrow(): I have failed in my mission."); |
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175 } |
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176 |
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177 |
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178 /** set vbuf b size=len, resize if necessary, relen = how much to over-allocate |
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179 */ |
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180 void pst_vbset(pst_vbuf * vb, void *b, size_t len) |
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181 { |
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182 pst_vbresize(vb, len); |
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183 memcpy(vb->b, b, len); |
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184 vb->dlen = len; |
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185 } |
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186 |
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187 |
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188 /** append len bytes of b to vb, resize if necessary |
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189 */ |
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190 void pst_vbappend(pst_vbuf *vb, void *b, size_t len) |
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191 { |
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192 if (0 == vb->dlen) { |
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193 pst_vbset(vb, b, len); |
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194 return; |
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195 } |
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196 pst_vbgrow(vb, len); |
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197 memcpy(vb->b + vb->dlen, b, len); |
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198 vb->dlen += len; |
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199 } |
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200 |
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201 |
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202 void pst_unicode_init() |
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203 { |
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204 if (unicode_up) pst_unicode_close(); |
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205 i16to8 = iconv_open("utf-8", "utf-16le"); |
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206 if (i16to8 == (iconv_t)-1) { |
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207 DEBUG_WARN(("Couldn't open iconv descriptor for utf-16le to utf-8.\n")); |
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208 } |
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209 unicode_up = 1; |
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210 } |
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211 |
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212 |
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213 size_t pst_vb_utf16to8(pst_vbuf *dest, const char *inbuf, int iblen) |
43 | 214 { |
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215 size_t inbytesleft = iblen; |
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216 size_t icresult = (size_t)-1; |
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217 size_t outbytesleft = 0; |
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218 char *outbuf = NULL; |
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219 int myerrno; |
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220 |
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221 if (!unicode_up) return (size_t)-1; // failure to open iconv |
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222 pst_vbresize(dest, iblen); |
43 | 223 |
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224 //Bad Things can happen if a non-zero-terminated utf16 string comes through here |
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225 if (!utf16_is_terminated(inbuf, iblen)) |
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226 return (size_t)-1; |
43 | 227 |
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228 do { |
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229 outbytesleft = dest->blen - dest->dlen; |
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230 outbuf = dest->b + dest->dlen; |
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231 icresult = iconv(i16to8, (ICONV_CONST char**)&inbuf, &inbytesleft, &outbuf, &outbytesleft); |
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232 myerrno = errno; |
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233 dest->dlen = outbuf - dest->b; |
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234 if (inbytesleft) pst_vbgrow(dest, inbytesleft); |
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235 } while ((size_t)-1 == icresult && E2BIG == myerrno); |
43 | 236 |
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237 if (icresult == (size_t)-1) { |
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238 DEBUG_WARN(("iconv failure: %s\n", strerror(myerrno))); |
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239 pst_unicode_init(); |
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240 return (size_t)-1; |
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241 } |
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242 return (icresult) ? (size_t)-1 : 0; |
43 | 243 } |
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244 |
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245 |
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246 size_t pst_vb_utf8to8bit(pst_vbuf *dest, const char *inbuf, int iblen, const char* charset) |
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247 { |
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248 open_targets(charset); |
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249 if (!target_open_from) return (size_t)-1; // failure to open the target |
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250 return sbcs_conversion(dest, inbuf, iblen, i8totarget); |
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251 } |
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252 |
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253 |
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254 size_t pst_vb_8bit2utf8(pst_vbuf *dest, const char *inbuf, int iblen, const char* charset) |
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255 { |
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256 open_targets(charset); |
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257 if (!target_open_to) return (size_t)-1; // failure to open the target |
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258 return sbcs_conversion(dest, inbuf, iblen, target2i8); |
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259 } |
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260 |