1 | /**************************************** |
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2 | * Computer Algebra System SINGULAR * |
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3 | ****************************************/ |
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4 | /* $Id$ */ |
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5 | /* |
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6 | * ABSTRACT: i/o system |
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7 | */ |
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8 | |
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9 | /* I need myfread in standalone_parser */ |
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10 | #ifndef STANDALONE_PARSER |
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11 | #include <kernel/mod2.h> |
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12 | |
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13 | #include <stdlib.h> |
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14 | #include <stdio.h> |
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15 | #include <omalloc/mylimits.h> |
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16 | #include <stdarg.h> |
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17 | #include <sys/stat.h> |
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18 | #include <ctype.h> |
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19 | #include <unistd.h> |
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20 | |
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21 | #ifdef HAVE_PWD_H |
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22 | #include <pwd.h> |
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23 | #endif |
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24 | |
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25 | #include <kernel/febase.h> |
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26 | #include <omalloc/omalloc.h> |
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27 | #include <reporter/reporter.h> |
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28 | #include <resources/feFopen.h> |
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29 | #include <misc/options.h> |
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30 | |
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31 | #define fePutChar(c) fputc((unsigned char)(c),stdout) |
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32 | /*0 implementation */ |
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33 | |
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34 | |
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35 | char fe_promptstr[] =" "; |
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36 | |
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37 | // output/print buffer: |
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38 | #define INITIAL_PRINT_BUFFER 24*1024L |
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39 | // line buffer for reading: |
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40 | // minimal value for MAX_FILE_BUFFER: 4*4096 - see Tst/Long/gcd0_l.tst |
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41 | // this is an upper limit for the size of monomials/numbers read via the interpreter |
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42 | #define MAX_FILE_BUFFER 4*4096 |
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43 | static long feBufferLength=INITIAL_PRINT_BUFFER; |
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44 | static char * feBuffer=(char *)omAlloc(INITIAL_PRINT_BUFFER); |
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45 | |
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46 | /************************************************************************** |
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47 | * handling of 'voices' |
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48 | **************************************************************************/ |
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49 | |
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50 | extern int blocknest; /* scaner.l internal */ |
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51 | |
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52 | int yy_noeof=0; // the scanner "state" |
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53 | int yy_blocklineno; // to get the lineno of the block start from scanner |
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54 | Voice *currentVoice = NULL; |
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55 | // FILE *feFilePending; /*temp. storage for grammar.y */ |
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56 | |
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57 | //static const char * BT_name[]={"BT_none","BT_break","BT_proc","BT_example", |
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58 | // "BT_file","BT_execute","BT_if","BT_else"}; |
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59 | /*2 |
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60 | * the name of the current 'Voice': the procname (or filename) |
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61 | */ |
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62 | const char * sNoName_fe="_"; |
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63 | const char * VoiceName() |
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64 | { |
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65 | if ((currentVoice!=NULL) |
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66 | && (currentVoice->filename!=NULL)) |
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67 | return currentVoice->filename; |
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68 | return sNoName_fe; |
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69 | } |
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70 | |
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71 | /*2 |
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72 | * the calling chain of Voices |
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73 | */ |
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74 | void VoiceBackTrack() |
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75 | { |
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76 | Voice *p=currentVoice; |
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77 | while (p->prev!=NULL) |
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78 | { |
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79 | p=p->prev; |
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80 | char *s=p->filename; |
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81 | if (s==NULL) |
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82 | PrintS("-- called from ? --\n"); |
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83 | else |
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84 | Print("-- called from %s --\n",s); |
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85 | } |
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86 | } |
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87 | |
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88 | /*2 |
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89 | * init a new voice similiar to the current |
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90 | */ |
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91 | void Voice::Next() |
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92 | { |
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93 | Voice *p=new Voice; |
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94 | // OB: ??? |
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95 | // Hmm... when Singular is used as batch file |
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96 | // then this voice is never freed |
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97 | omMarkAsStaticAddr(p); |
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98 | if (currentVoice != NULL) |
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99 | { |
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100 | currentVoice->curr_lineno=yylineno; |
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101 | currentVoice->next=p; |
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102 | } |
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103 | p->prev=currentVoice; |
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104 | currentVoice=p; |
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105 | //Print("Next:"); |
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106 | } |
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107 | |
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108 | feBufferTypes Voice::Typ() |
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109 | { |
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110 | switch(typ) |
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111 | { |
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112 | case BT_proc: |
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113 | case BT_example: |
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114 | case BT_file: |
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115 | return typ; |
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116 | default: |
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117 | if (prev==NULL) return (feBufferTypes)0; |
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118 | return prev->Typ(); |
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119 | } |
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120 | } |
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121 | |
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122 | /*2 |
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123 | * start the file 'fname' (STDIN is stdin) as a new voice (cf.VFile) |
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124 | * return FALSE on success, TRUE if an error occurs (file cannot be opened) |
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125 | */ |
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126 | BOOLEAN newFile(char *fname,FILE* f) |
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127 | { |
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128 | currentVoice->Next(); |
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129 | //Print(":File%d(%s):%s(%x)\n", |
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130 | // currentVoice->typ,BT_name[currentVoice->typ],fname,currentVoice); |
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131 | currentVoice->filename = omStrDup(fname); |
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132 | omMarkAsStaticAddr(currentVoice->filename); |
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133 | if (strcmp(fname,"STDIN") == 0) |
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134 | { |
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135 | currentVoice->files = stdin; |
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136 | currentVoice->sw = BI_stdin; |
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137 | currentVoice->start_lineno = 1; |
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138 | } |
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139 | else |
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140 | { |
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141 | currentVoice->sw = BI_file; /* needed by exitVoice below */ |
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142 | if (f!=NULL) |
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143 | currentVoice->files = f; |
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144 | else |
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145 | { |
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146 | currentVoice->files = feFopen(fname,"r",NULL,TRUE); |
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147 | if (currentVoice->files==NULL) |
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148 | { |
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149 | exitVoice(); |
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150 | return TRUE; |
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151 | } |
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152 | } |
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153 | currentVoice->start_lineno = 0; |
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154 | } |
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155 | yylineno=currentVoice->start_lineno; |
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156 | //Voice *p=currentVoice; |
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157 | //Print("-----------------\ncurr:"); |
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158 | //do |
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159 | //{ |
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160 | //Print("voice fn:%s\n",p->filename); |
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161 | //p=p->prev; |
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162 | //} |
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163 | //while (p!=NULL); |
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164 | //Print("----------------\n"); |
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165 | return FALSE; |
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166 | } |
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167 | |
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168 | void newBuffer(char* s, feBufferTypes t, procinfo* pi, int lineno) |
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169 | { |
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170 | currentVoice->Next(); |
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171 | //Print(":Buffer%d(%s):%s(%x)\n", |
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172 | // t,BT_name[t],pname,currentVoice); |
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173 | if (pi!=NULL) |
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174 | { |
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175 | long l=strlen(pi->procname); |
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176 | if (pi->libname!=NULL) l+=strlen(pi->libname); |
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177 | currentVoice->filename = (char *)omAlloc(l+3); |
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178 | *currentVoice->filename='\0'; |
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179 | if (pi->libname!=NULL) strcat(currentVoice->filename,pi->libname); |
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180 | strcat(currentVoice->filename,"::"); |
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181 | strcat(currentVoice->filename,pi->procname); |
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182 | currentVoice->pi = pi; |
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183 | } |
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184 | else |
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185 | { |
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186 | currentVoice->filename = omStrDup(currentVoice->prev->filename); |
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187 | currentVoice->pi = currentVoice->prev->pi; |
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188 | } |
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189 | currentVoice->buffer = s; |
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190 | currentVoice->sw = BI_buffer; |
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191 | currentVoice->typ = t; |
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192 | switch (t) |
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193 | { |
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194 | case BT_execute: |
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195 | yylineno-=2; |
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196 | break; |
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197 | case BT_proc: |
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198 | case BT_example: |
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199 | currentVoice->oldb=myynewbuffer(); |
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200 | yylineno = lineno+1; |
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201 | break; |
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202 | case BT_if: |
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203 | case BT_else: |
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204 | case BT_break: |
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205 | yylineno = yy_blocklineno-1; |
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206 | break; |
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207 | //case BT_file: |
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208 | default: |
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209 | yylineno = 1; |
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210 | break; |
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211 | } |
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212 | //Print("start body (%s) at line %d\n",BT_name[t],yylineno); |
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213 | currentVoice->start_lineno = yylineno; |
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214 | //printf("start buffer typ %d\n",t); |
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215 | //Voice *p=currentVoice; |
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216 | //Print("-----------------\ncurr:"); |
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217 | //do |
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218 | //{ |
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219 | //Print("voice fn:%s\n",p->filename); |
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220 | //p=p->prev; |
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221 | //} |
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222 | //while (p!=NULL); |
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223 | //Print("----------------\n"); |
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224 | } |
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225 | |
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226 | /*2 |
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227 | * exit Buffer of type 'typ': |
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228 | * returns 1 if buffer type could not be found |
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229 | */ |
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230 | BOOLEAN exitBuffer(feBufferTypes typ) |
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231 | { |
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232 | //printf("exitBuffer: %d(%s),(%x)\n", |
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233 | // typ,BT_name[typ], currentVoice); |
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234 | //Voice *p=currentVoice; |
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235 | //Print("-----------------\ncurr:"); |
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236 | //do |
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237 | //{ |
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238 | //Print("voice fn:%s\n",p->filename); |
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239 | //p=p->prev; |
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240 | //} |
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241 | //while (p!=NULL); |
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242 | //Print("----------------\n"); |
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243 | if (typ == BT_break) // valid inside for, while. may skip if, else |
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244 | { |
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245 | /*4 first check for valid buffer type, skip if/else*/ |
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246 | Voice *p=currentVoice; |
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247 | loop |
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248 | { |
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249 | if ((p->typ != BT_if) |
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250 | &&(p->typ != BT_else)) |
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251 | { |
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252 | if (p->typ == BT_break /*typ*/) |
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253 | { |
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254 | while (p != currentVoice) |
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255 | { |
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256 | exitVoice(); |
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257 | } |
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258 | exitVoice(); |
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259 | return FALSE; |
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260 | } |
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261 | else return TRUE; |
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262 | } |
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263 | if (p->prev==NULL) break; |
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264 | p=p->prev; |
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265 | } |
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266 | /*4 break not inside a for/while: return an error*/ |
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267 | if (/*typ*/ BT_break != currentVoice->typ) return 1; |
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268 | return exitVoice(); |
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269 | } |
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270 | |
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271 | if ((typ == BT_proc) |
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272 | || (typ == BT_example)) |
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273 | { |
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274 | Voice *p=currentVoice; |
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275 | loop |
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276 | { |
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277 | if ((p->typ == BT_proc) |
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278 | || (p->typ == BT_example)) |
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279 | { |
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280 | while (p != currentVoice) |
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281 | { |
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282 | exitVoice(); |
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283 | } |
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284 | exitVoice(); |
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285 | return FALSE; |
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286 | } |
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287 | if (p->prev==NULL) break; |
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288 | p=p->prev; |
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289 | } |
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290 | } |
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291 | /*4 return not inside a proc: return an error*/ |
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292 | return TRUE; |
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293 | } |
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294 | |
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295 | /*2 |
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296 | * jump to the beginning of a buffer |
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297 | */ |
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298 | BOOLEAN contBuffer(feBufferTypes typ) |
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299 | { |
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300 | //printf("contBuffer: %d(%s),(%x)\n", |
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301 | // typ,BT_name[typ], currentVoice); |
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302 | if (typ == BT_break) // valid inside for, while. may skip if, else |
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303 | { |
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304 | // first check for valid buffer type |
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305 | Voice *p=currentVoice; |
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306 | loop |
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307 | { |
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308 | if ((p->typ != BT_if) |
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309 | &&(p->typ != BT_else)) |
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310 | { |
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311 | if (p->typ == BT_break /*typ*/) |
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312 | { |
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313 | while (p != currentVoice) |
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314 | { |
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315 | exitVoice(); |
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316 | } |
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317 | yylineno = currentVoice->start_lineno; |
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318 | currentVoice->fptr=0; |
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319 | return FALSE; |
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320 | } |
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321 | else return TRUE; |
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322 | } |
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323 | if (p->prev==NULL) break; |
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324 | p=p->prev; |
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325 | } |
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326 | } |
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327 | return TRUE; |
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328 | } |
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329 | |
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330 | /*2 |
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331 | * leave a voice: kill local variables |
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332 | * setup everything from the previous level |
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333 | * return 1 if leaving the top level, 0 otherwise |
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334 | */ |
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335 | BOOLEAN exitVoice() |
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336 | { |
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337 | //printf("exitVoice: %d(%s),(%x)\n", |
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338 | // currentVoice->typ,BT_name[currentVoice->typ], currentVoice); |
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339 | //{ |
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340 | //Voice *p=currentVoice; |
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341 | //Print("-----------------\ncurr:"); |
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342 | //do |
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343 | //{ |
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344 | //Print("voice fn:%s\n",p->filename); |
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345 | //p=p->prev; |
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346 | //} |
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347 | //while (p!=NULL); |
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348 | //Print("----------------\n"); |
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349 | //} |
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350 | if (currentVoice!=NULL) |
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351 | { |
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352 | if (currentVoice->oldb!=NULL) |
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353 | { |
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354 | myyoldbuffer(currentVoice->oldb); |
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355 | currentVoice->oldb=NULL; |
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356 | } |
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357 | if ((currentVoice->prev==NULL)&&(currentVoice->sw==BI_file)) |
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358 | { |
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359 | currentVoice->prev=feInitStdin(currentVoice); |
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360 | } |
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361 | if (currentVoice->prev!=NULL) |
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362 | { |
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363 | //printf("exitVoice typ %d(%s)\n", |
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364 | // currentVoice->typ,BT_name[currentVoice->typ]); |
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365 | if (currentVoice->typ==BT_if) |
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366 | { |
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367 | currentVoice->prev->ifsw=2; |
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368 | } |
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369 | else |
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370 | { |
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371 | currentVoice->prev->ifsw=0; |
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372 | } |
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373 | if ((currentVoice->sw == BI_file) |
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374 | && (currentVoice->files!=NULL)) |
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375 | { |
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376 | fclose(currentVoice->files); |
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377 | } |
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378 | if (currentVoice->filename!=NULL) |
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379 | { |
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380 | omFree((ADDRESS)currentVoice->filename); |
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381 | currentVoice->filename=NULL; |
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382 | } |
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383 | if (currentVoice->buffer!=NULL) |
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384 | { |
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385 | omFree((ADDRESS)currentVoice->buffer); |
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386 | currentVoice->buffer=NULL; |
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387 | } |
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388 | yylineno=currentVoice->prev->curr_lineno; |
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389 | currentVoice->prev->next=NULL; |
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390 | } |
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391 | Voice *p=currentVoice->prev; |
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392 | delete currentVoice; |
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393 | currentVoice=p; |
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394 | } |
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395 | return currentVoice==NULL; |
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396 | } |
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397 | |
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398 | /*2 |
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399 | * set prompt_char |
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400 | * only called with currentVoice->sw == BI_stdin |
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401 | */ |
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402 | static void feShowPrompt(void) |
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403 | { |
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404 | fe_promptstr[0]=prompt_char; |
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405 | } |
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406 | |
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407 | /*2 |
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408 | * print echo (si_echo or TRACE), set my_yylinebuf |
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409 | */ |
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410 | static int fePrintEcho(char *anf, char *b) |
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411 | { |
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412 | char *ss=strrchr(anf,'\n'); |
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413 | int len_s; |
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414 | if (ss==NULL) |
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415 | { |
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416 | len_s=strlen(anf); |
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417 | } |
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418 | else |
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419 | { |
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420 | len_s=ss-anf+1; |
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421 | } |
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422 | // my_yylinebuf: |
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423 | int mrc=si_min(len_s,79)-1; |
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424 | strcpy(my_yylinebuf,anf+(len_s-1)-mrc); |
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425 | if (my_yylinebuf[mrc] == '\n') my_yylinebuf[mrc] = '\0'; |
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426 | mrc--; |
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427 | // handle echo: |
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428 | if (((si_echo>myynest) |
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429 | && ((currentVoice->typ==BT_proc) |
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430 | || (currentVoice->typ==BT_example) |
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431 | || (currentVoice->typ==BT_file) |
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432 | || (currentVoice->typ==BT_none) |
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433 | ) |
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434 | && (strncmp(anf,";return();",10)!=0) |
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435 | ) |
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436 | || (traceit&TRACE_SHOW_LINE) |
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437 | || (traceit&TRACE_SHOW_LINE1)) |
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438 | { |
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439 | if (currentVoice->typ!=BT_example) |
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440 | { |
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441 | if (currentVoice->filename==NULL) |
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442 | Print("(none) %3d%c ",yylineno,prompt_char); |
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443 | else |
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444 | Print("%s %3d%c ",currentVoice->filename,yylineno,prompt_char); |
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445 | } |
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446 | { |
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447 | fwrite(anf,1,len_s,stdout); |
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448 | mflush(); |
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449 | } |
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450 | if (traceit&TRACE_SHOW_LINE) |
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451 | { |
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452 | while(fgetc(stdin)!='\n'); |
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453 | } |
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454 | } |
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455 | else if (traceit&TRACE_SHOW_LINENO) |
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456 | { |
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457 | Print("{%d}",yylineno); |
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458 | mflush(); |
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459 | } |
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460 | #ifdef HAVE_SDB |
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461 | if ((blocknest==0) |
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462 | && (currentVoice->pi!=NULL) |
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463 | && (currentVoice->pi->trace_flag!=0)) |
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464 | { |
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465 | sdb(currentVoice, anf, len_s); |
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466 | } |
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467 | #endif |
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468 | prompt_char = '.'; |
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469 | return len_s; |
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470 | } |
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471 | |
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472 | int feReadLine(char* b, int l) |
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473 | { |
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474 | char *s=NULL; |
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475 | int offset = 0; /* will not be used if s==NULL*/ |
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476 | // try to read from the buffer into b, max l chars |
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477 | if (currentVoice!=NULL) |
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478 | { |
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479 | if((currentVoice->buffer!=NULL) |
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480 | && (currentVoice->buffer[currentVoice->fptr]!='\0')) |
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481 | { |
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482 | NewBuff: |
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483 | register int i=0; |
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484 | long startfptr=currentVoice->fptr; |
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485 | long tmp_ptr=currentVoice->fptr; |
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486 | l--; |
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487 | loop |
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488 | { |
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489 | register char c= |
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490 | b[i]=currentVoice->buffer[tmp_ptr/*currentVoice->fptr*/]; |
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491 | i++; |
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492 | if (yy_noeof==noeof_block) |
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493 | { |
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494 | if (c<' ') yylineno++; |
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495 | else if (c=='}') break; |
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496 | } |
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497 | else |
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498 | { |
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499 | if ((c<' ') || |
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500 | (c==';') || |
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501 | (c==')') |
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502 | ) |
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503 | break; |
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504 | } |
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505 | if (i>=l) break; |
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506 | tmp_ptr++;/*currentVoice->fptr++;*/ |
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507 | if(currentVoice->buffer[tmp_ptr/*currentVoice->fptr*/]=='\0') break; |
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508 | } |
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509 | currentVoice->fptr=tmp_ptr; |
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510 | b[i]='\0'; |
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511 | if (currentVoice->sw==BI_buffer) |
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512 | { |
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513 | if (startfptr==0) |
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514 | { |
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515 | char *anf=currentVoice->buffer; |
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516 | const char *ss=strchr(anf,'\n'); |
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517 | long len; |
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518 | if (ss==NULL) len=strlen(anf); |
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519 | else len=ss-anf; |
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520 | char *s=(char *)omAlloc(len+2); |
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521 | strncpy(s,anf,len+2); |
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522 | s[len+1]='\0'; |
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523 | fePrintEcho(s,b); |
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524 | omFree((ADDRESS)s); |
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525 | } |
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526 | else if (/*(startfptr>0) &&*/ |
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527 | (currentVoice->buffer[startfptr-1]=='\n')) |
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528 | { |
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529 | char *anf=currentVoice->buffer+startfptr; |
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530 | const char *ss=strchr(anf,'\n'); |
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531 | long len; |
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532 | if (ss==NULL) len=strlen(anf); |
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533 | else len=ss-anf; |
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534 | char *s=(char *)omAlloc(len+2); |
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535 | strncpy(s,anf,len+2); |
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536 | s[len+1]='\0'; |
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537 | yylineno++; |
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538 | fePrintEcho(s,b); |
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539 | omFree((ADDRESS)s); |
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540 | } |
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541 | } |
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542 | currentVoice->fptr++; |
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543 | return i; |
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544 | } |
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545 | // no buffer there or e-o-buffer or eoln: |
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546 | if (currentVoice->sw!=BI_buffer) |
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547 | { |
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548 | currentVoice->fptr=0; |
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549 | if (currentVoice->buffer==NULL) |
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550 | { |
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551 | currentVoice->buffer=(char *)omAlloc(MAX_FILE_BUFFER-sizeof(ADDRESS)); |
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552 | omMarkAsStaticAddr(currentVoice->buffer); |
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553 | } |
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554 | } |
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555 | offset=0; |
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556 | NewRead: |
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557 | yylineno++; |
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558 | if (currentVoice->sw==BI_stdin) |
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559 | { |
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560 | feShowPrompt(); |
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561 | s=fe_fgets_stdin(fe_promptstr, |
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562 | &(currentVoice->buffer[offset]), |
---|
563 | omSizeOfAddr(currentVoice->buffer)-1-offset); |
---|
564 | //int i=0; |
---|
565 | //if (s!=NULL) |
---|
566 | // while((s[i]!='\0') /*&& (i<MAX_FILE_BUFFER)*/) {s[i] &= (char)127;i++;} |
---|
567 | } |
---|
568 | else if (currentVoice->sw==BI_file) |
---|
569 | { |
---|
570 | s=fgets(currentVoice->buffer+offset,(MAX_FILE_BUFFER-1-sizeof(ADDRESS))-offset, |
---|
571 | currentVoice->files); |
---|
572 | } |
---|
573 | //else /* BI_buffer */ s==NULL => return 0 |
---|
574 | // done by the default return |
---|
575 | } |
---|
576 | if (s!=NULL) |
---|
577 | { |
---|
578 | // handle prot: |
---|
579 | if (feProt&PROT_I) |
---|
580 | { |
---|
581 | fputs(s,feProtFile); |
---|
582 | } |
---|
583 | int rc=fePrintEcho(s,b)+1; |
---|
584 | //s[strlen(s)+1]='\0'; add an second \0 at the end of the string |
---|
585 | s[rc]='\0'; |
---|
586 | // handel \\ : |
---|
587 | rc-=3; |
---|
588 | if ((s[rc]=='\\')&&(currentVoice->sw!=BI_buffer)) |
---|
589 | { |
---|
590 | s[rc]='\0'; |
---|
591 | offset+=rc; |
---|
592 | if (offset<(int)omSizeOfAddr(currentVoice->buffer)) goto NewRead; |
---|
593 | } |
---|
594 | goto NewBuff; |
---|
595 | } |
---|
596 | /* else if (s==NULL) */ |
---|
597 | { |
---|
598 | const char *err; |
---|
599 | switch(yy_noeof) |
---|
600 | { |
---|
601 | case noeof_brace: |
---|
602 | case noeof_block: |
---|
603 | err="{...}"; |
---|
604 | break; |
---|
605 | case noeof_asstring: |
---|
606 | err="till `.`"; |
---|
607 | break; |
---|
608 | case noeof_string: |
---|
609 | err="string"; |
---|
610 | break; |
---|
611 | case noeof_bracket: |
---|
612 | err="(...)"; |
---|
613 | break; |
---|
614 | case noeof_procname: |
---|
615 | err="proc"; |
---|
616 | break; |
---|
617 | case noeof_comment: |
---|
618 | err="/*...*/"; |
---|
619 | break; |
---|
620 | default: |
---|
621 | return 0; |
---|
622 | } |
---|
623 | Werror("premature end of file while reading %s",err); |
---|
624 | return 0; |
---|
625 | } |
---|
626 | } |
---|
627 | |
---|
628 | /*2 |
---|
629 | * init all data structures |
---|
630 | */ |
---|
631 | #ifndef STDIN_FILENO |
---|
632 | #define STDIN_FILENO 0 |
---|
633 | #endif |
---|
634 | Voice * feInitStdin(Voice *pp) |
---|
635 | { |
---|
636 | Voice *p = new Voice; |
---|
637 | p->files = stdin; |
---|
638 | p->sw = (isatty(STDIN_FILENO)) ? BI_stdin : BI_file; |
---|
639 | if ((pp!=NULL) && (pp->files==stdin)) |
---|
640 | { |
---|
641 | p->files=freopen("/dev/tty","r",stdin); |
---|
642 | //stdin=p->files; |
---|
643 | p->sw = BI_stdin; |
---|
644 | } |
---|
645 | p->filename = omStrDup("STDIN"); |
---|
646 | p->start_lineno = 1; |
---|
647 | omMarkAsStaticAddr(p); |
---|
648 | omMarkAsStaticAddr(p->filename); |
---|
649 | return p; |
---|
650 | } |
---|
651 | |
---|
652 | |
---|
653 | #else /* ! STANDALONE_PARSER */ |
---|
654 | #include <stdio.h> |
---|
655 | |
---|
656 | #endif |
---|
657 | |
---|