1 | /**************************************** |
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2 | * Computer Algebra System SINGULAR * |
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3 | ****************************************/ |
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4 | /* |
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5 | * ABSTRACT: input from ttys, simulating fgets |
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6 | */ |
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7 | |
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8 | #include "kernel/mod2.h" |
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9 | #include <errno.h> |
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10 | #include <stdio.h> |
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11 | |
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12 | // ---------------------------------------- |
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13 | // system settings: |
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14 | |
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15 | #undef USE_READLINE4 |
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16 | |
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17 | //---------------------------------------- |
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18 | #ifdef __CYGWIN__ |
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19 | #define READLINE_STATIC |
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20 | #endif |
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21 | #include "omalloc/omalloc.h" |
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22 | #include "misc/options.h" |
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23 | |
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24 | #include "kernel/oswrapper/feread.h" |
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25 | #include "reporter/reporter.h" |
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26 | |
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27 | #if defined(HAVE_DYN_RL) |
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28 | #include <unistd.h> |
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29 | #endif |
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30 | |
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31 | static char * fe_fgets_stdin_init(const char *pr,char *s, int size); |
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32 | char * (*fe_fgets_stdin)(const char *pr,char *s, int size) |
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33 | = fe_fgets_stdin_init; |
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34 | |
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35 | extern char *iiArithGetCmd(int); |
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36 | |
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37 | /* ===================================================================*/ |
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38 | /* = static/dymanic readline = */ |
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39 | /* ===================================================================*/ |
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40 | #if defined(HAVE_READLINE) || defined(HAVE_DYN_RL) || defined(HAVE_LIBREADLINE) |
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41 | |
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42 | #ifndef STDOUT_FILENO |
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43 | #define STDOUT_FILENO 1 |
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44 | #endif |
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45 | |
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46 | /* Generator function for command completion. STATE lets us know whether |
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47 | * to start from scratch; without any state (i.e. STATE == 0), then we |
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48 | * start at the top of the list. |
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49 | */ |
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50 | #include "Singular/ipid.h" |
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51 | extern "C" |
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52 | char *command_generator (char *text, int state) |
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53 | { |
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54 | STATIC_VAR int list_index, len; |
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55 | STATIC_VAR idhdl h; |
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56 | const char *name; |
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57 | |
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58 | /* If this is a new word to complete, initialize now. This includes |
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59 | saving the length of TEXT for efficiency, and initializing the index |
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60 | variable to 0. */ |
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61 | if (state==0) |
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62 | { |
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63 | list_index = 1; |
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64 | len = strlen (text); |
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65 | h=basePack->idroot; |
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66 | } |
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67 | |
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68 | /* Return the next name which partially matches from the command list. */ |
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69 | while ((name = iiArithGetCmd(list_index))!=NULL) |
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70 | { |
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71 | list_index++; |
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72 | |
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73 | if (strncmp (name, text, len) == 0) |
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74 | return (strdup(name)); |
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75 | } |
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76 | if (len>1) |
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77 | { |
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78 | while (h!=NULL) |
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79 | { |
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80 | name=h->id; |
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81 | h=h->next; |
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82 | if (strncmp (name, text, len) == 0) |
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83 | return (strdup(name)); |
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84 | } |
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85 | } |
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86 | /* If no names matched, then return NULL. */ |
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87 | return ((char *)NULL); |
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88 | } |
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89 | #endif |
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90 | |
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91 | /* ===================================================================*/ |
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92 | /* = static readline = */ |
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93 | /* ===================================================================*/ |
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94 | /* some procedure are shared with "dynamic readline" */ |
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95 | #if (defined(HAVE_READLINE) || defined(HAVE_LIBREADLINE) || defined(HAVE_DYN_RL)) |
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96 | #include <unistd.h> |
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97 | #include <stdio.h> |
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98 | #include <stdlib.h> |
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99 | #include <sys/types.h> |
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100 | #include <sys/file.h> |
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101 | #include <sys/stat.h> |
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102 | |
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103 | // #undef READLINE_READLINE_H_OK |
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104 | |
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105 | extern "C" { |
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106 | VAR BOOLEAN using_history_called=FALSE; |
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107 | typedef char * (*RL_PROC)(const char*,int); |
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108 | #ifdef READLINE_READLINE_H_OK |
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109 | #include <readline/readline.h> |
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110 | #ifdef HAVE_READLINE_HISTORY_H |
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111 | #include <readline/history.h> |
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112 | #endif |
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113 | #endif |
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114 | |
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115 | #ifdef RL_VERSION_MAJOR |
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116 | #if (RL_VERSION_MAJOR >= 4) |
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117 | #define USE_READLINE4 |
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118 | #endif |
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119 | #endif |
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120 | |
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121 | #ifndef USE_READLINE4 |
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122 | #define rl_filename_completion_function filename_completion_function |
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123 | #define rl_completion_matches completion_matches |
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124 | #endif |
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125 | #ifndef READLINE_READLINE_H_OK |
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126 | /* declare everything we need explicitely and do not rely on includes */ |
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127 | EXTERN_VAR char * rl_readline_name; |
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128 | EXTERN_VAR char *rl_line_buffer; |
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129 | char *rl_filename_completion_function(const char*, int); |
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130 | typedef char **CPPFunction (); |
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131 | |
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132 | extern char ** rl_completion_matches (const char*, RL_PROC); |
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133 | EXTERN_VAR CPPFunction * rl_attempted_completion_function; |
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134 | EXTERN_VAR FILE * rl_outstream; |
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135 | extern char * readline (const char *); |
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136 | extern void add_history (char *); |
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137 | extern int write_history (); |
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138 | extern void using_history(); |
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139 | extern int read_history(char *); |
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140 | extern int history_total_bytes(); |
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141 | #endif /* READLINE_READLINE_H_OK */ |
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142 | |
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143 | typedef char * (*PROC)(); |
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144 | |
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145 | typedef char **RL_CPPFunction (const char*, int,int); |
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146 | } |
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147 | |
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148 | |
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149 | char * fe_fgets_stdin_rl(const char *pr,char *s, int size); |
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150 | |
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151 | /* Tell the GNU Readline library how to complete. We want to try to complete |
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152 | on command names or on filenames if it is preceded by " */ |
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153 | |
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154 | /* Attempt to complete on the contents of TEXT. START and END show the |
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155 | * region of TEXT that contains the word to complete. We can use the |
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156 | * entire line in case we want to do some simple parsing. Return the |
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157 | * array of matches, or NULL if there aren't any. |
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158 | */ |
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159 | #if defined(HAVE_DYN_RL) |
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160 | extern "C" |
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161 | { |
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162 | int fe_init_dyn_rl(); |
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163 | char *(*fe_filename_completion_function)(); /* 3 */ |
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164 | char *(* fe_readline) (char *); /* 4 */ |
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165 | VAR void (*fe_add_history) (char *); /* 5 */ |
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166 | VAR char ** fe_rl_readline_name; /* 6 */ |
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167 | VAR char **fe_rl_line_buffer; /* 7 */ |
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168 | char **(*fe_completion_matches)(...); /* 8 */ |
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169 | VAR CPPFunction **fe_rl_attempted_completion_function; /* 9 */ |
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170 | VAR FILE ** fe_rl_outstream; /* 10 */ |
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171 | VAR int (*fe_write_history) (); /* 11 */ |
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172 | VAR int (*fe_history_total_bytes) (); /* 12 */ |
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173 | VAR void (*fe_using_history) (); /* 13 */ |
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174 | VAR int (*fe_read_history) (char *); /* 14 */ |
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175 | |
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176 | } |
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177 | #endif |
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178 | char ** singular_completion (char *text, int start, int end) |
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179 | { |
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180 | /* If this word is not in a string, then it may be a command |
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181 | to complete. Otherwise it may be the name of a file in the current |
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182 | directory. */ |
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183 | #ifdef HAVE_DYN_RL |
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184 | #define x_rl_line_buffer (*fe_rl_line_buffer) |
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185 | #define x_rl_completion_matches (*fe_completion_matches) |
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186 | #define x_rl_filename_completion_function (*fe_filename_completion_function) |
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187 | #else |
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188 | #define x_rl_line_buffer rl_line_buffer |
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189 | #define x_rl_completion_matches rl_completion_matches |
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190 | #define x_rl_filename_completion_function rl_filename_completion_function |
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191 | #endif |
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192 | if ((start>0) && (x_rl_line_buffer[start-1]=='"')) |
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193 | return x_rl_completion_matches (text, (RL_PROC)x_rl_filename_completion_function); |
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194 | char **m=x_rl_completion_matches (text, (RL_PROC)command_generator); |
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195 | #undef x_rl_line_buffer |
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196 | #undef x_rl_completion_matches |
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197 | if (m==NULL) |
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198 | { |
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199 | m=(char **)malloc(2*sizeof(char*)); |
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200 | m[0]=(char *)malloc(end-start+2); |
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201 | strncpy(m[0],text,end-start+1); |
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202 | m[1]=NULL; |
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203 | } |
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204 | return m; |
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205 | } |
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206 | |
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207 | #ifndef HAVE_DYN_RL |
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208 | char * fe_fgets_stdin_rl(const char *pr,char *s, int size) |
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209 | { |
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210 | if (!BVERBOSE(V_PROMPT)) |
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211 | { |
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212 | pr=""; |
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213 | } |
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214 | mflush(); |
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215 | |
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216 | char *line; |
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217 | line = readline (pr); |
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218 | |
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219 | if (line==NULL) |
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220 | return NULL; |
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221 | |
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222 | int l=strlen(line); |
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223 | for (int i=l-1;i>=0;i--) line[i]=line[i]&127; |
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224 | |
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225 | if (*line!='\0') |
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226 | { |
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227 | add_history (line); |
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228 | } |
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229 | if (l>=size-1) |
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230 | { |
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231 | strncpy(s,line,size); |
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232 | } |
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233 | else |
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234 | { |
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235 | strncpy(s,line,l); |
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236 | s[l]='\n'; |
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237 | s[l+1]='\0'; |
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238 | } |
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239 | free (line); |
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240 | |
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241 | return s; |
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242 | } |
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243 | #endif |
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244 | #endif |
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245 | |
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246 | /* ===================================================================*/ |
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247 | /* = emulated readline = */ |
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248 | /* ===================================================================*/ |
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249 | #if !defined(HAVE_READLINE) && defined(HAVE_FEREAD) |
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250 | extern "C" { |
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251 | char * fe_fgets_stdin_fe(const char *pr,char *s, int size); |
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252 | } |
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253 | char * fe_fgets_stdin_emu(const char *pr,char *s, int size) |
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254 | { |
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255 | if (!BVERBOSE(V_PROMPT)) |
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256 | { |
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257 | pr=""; |
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258 | } |
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259 | mflush(); |
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260 | return fe_fgets_stdin_fe(pr,s,size); |
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261 | } |
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262 | #endif |
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263 | |
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264 | /* ===================================================================*/ |
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265 | /* = dynamic readline = */ |
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266 | /* ===================================================================*/ |
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267 | /* some procedure are shared with "static readline" */ |
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268 | #if defined(HAVE_DYN_RL) |
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269 | char * fe_fgets_stdin_drl(const char *pr,char *s, int size) |
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270 | { |
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271 | if (!BVERBOSE(V_PROMPT)) |
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272 | { |
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273 | pr=""; |
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274 | } |
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275 | mflush(); |
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276 | |
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277 | char *line; |
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278 | line = (*fe_readline) ((char*)pr); |
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279 | |
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280 | if (line==NULL) |
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281 | return NULL; |
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282 | |
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283 | int l=strlen(line); |
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284 | for (int i=l-1;i>=0;i--) line[i]=line[i]&127; |
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285 | |
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286 | if (*line!='\0') |
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287 | { |
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288 | (*fe_add_history) (line); |
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289 | } |
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290 | if (l>=size-1) |
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291 | { |
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292 | strncpy(s,line,size); |
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293 | } |
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294 | else |
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295 | { |
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296 | strncpy(s,line,l); |
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297 | s[l]='\n'; |
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298 | s[l+1]='\0'; |
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299 | } |
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300 | free (line); |
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301 | |
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302 | return s; |
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303 | } |
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304 | #endif |
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305 | |
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306 | /* ===================================================================*/ |
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307 | /* = fgets = */ |
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308 | /* ===================================================================*/ |
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309 | char * fe_fgets(const char *pr,char *s, int size) |
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310 | { |
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311 | if (BVERBOSE(V_PROMPT)) |
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312 | { |
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313 | fputs(pr,stdout); |
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314 | } |
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315 | mflush(); |
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316 | errno=0; |
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317 | char *line=fgets(s,size,stdin); |
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318 | if (line!=NULL) |
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319 | { |
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320 | for (int i=strlen(line)-1;i>=0;i--) line[i]=line[i]&127; |
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321 | } |
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322 | else |
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323 | { |
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324 | /* NULL can mean various things... */ |
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325 | switch(errno) |
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326 | { |
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327 | case 0: return NULL; /*EOF */ |
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328 | case EBADF: return NULL; /* stdin got closed */ |
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329 | case EINTR: return strcpy(s,"\n"); /* CTRL-C or other signal */ |
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330 | default: /* other error */ |
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331 | { |
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332 | int errsv = errno; |
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333 | fprintf(stderr,"fgets() failed with errno %d\n%s\n",errsv,strerror(errsv)); |
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334 | return NULL; |
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335 | } |
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336 | } |
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337 | } |
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338 | return line; |
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339 | } |
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340 | |
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341 | /* ===================================================================*/ |
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342 | /* = init for static rl, dyn. rl, emu. rl = */ |
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343 | /* ===================================================================*/ |
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344 | static char * fe_fgets_stdin_init(const char *pr,char *s, int size) |
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345 | { |
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346 | #if (defined(HAVE_READLINE) || defined(HAVE_LIBREADLINE)) && !defined(HAVE_DYN_RL) && !defined(HAVE_FEREAD) |
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347 | /* Allow conditional parsing of the ~/.inputrc file. */ |
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348 | rl_readline_name = (char*)"Singular"; |
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349 | /* Tell the completer that we want a crack first. */ |
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350 | #ifdef USE_READLINE4 |
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351 | rl_attempted_completion_function = (rl_completion_func_t *)singular_completion; |
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352 | #else |
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353 | rl_attempted_completion_function = (CPPFunction *)singular_completion; |
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354 | #endif |
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355 | |
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356 | /* set the output stream */ |
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357 | if(!isatty(STDOUT_FILENO)) |
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358 | { |
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359 | #ifdef atarist |
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360 | rl_outstream = fopen( "/dev/tty", "w" ); |
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361 | #else |
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362 | char *fn=ttyname(fileno(stdin));//if stdout is not a tty, maybe stdin is? |
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363 | if (fn!=NULL) rl_outstream = fopen( fn, "w" ); |
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364 | #endif |
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365 | } |
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366 | |
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367 | using_history_called=FALSE; |
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368 | if(isatty(fileno(stdin))) |
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369 | { |
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370 | /* try to read a history */ |
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371 | using_history_called=TRUE; |
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372 | using_history(); |
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373 | char *p = getenv("SINGULARHIST"); |
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374 | if (p==NULL) p=SINGULARHIST_FILE; |
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375 | if (strlen(p) != 0) |
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376 | { |
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377 | read_history (p); |
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378 | } |
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379 | fe_fgets_stdin=fe_fgets_stdin_rl; |
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380 | return(fe_fgets_stdin_rl(pr,s,size)); |
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381 | } |
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382 | else |
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383 | { |
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384 | fe_fgets_stdin=fe_fgets; |
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385 | return(fe_fgets(pr,s,size)); |
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386 | } |
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387 | #endif |
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388 | #ifdef HAVE_DYN_RL |
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389 | /* do dynamic loading */ |
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390 | int res=fe_init_dyn_rl(); |
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391 | using_history_called=FALSE; |
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392 | if (res!=0) |
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393 | { |
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394 | //if (res==1) |
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395 | // WarnS("dynamic loading of libreadline failed"); |
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396 | //else |
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397 | // Warn("dynamic loading failed: %d\n",res); |
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398 | if (res!=1) |
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399 | Warn("dynamic loading failed: %d\n",res); |
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400 | #ifdef HAVE_FEREAD |
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401 | fe_fgets_stdin=fe_fgets_stdin_emu; |
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402 | #else |
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403 | fe_fgets_stdin=fe_fgets; |
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404 | #endif |
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405 | return fe_fgets_stdin(pr,s,size); |
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406 | } |
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407 | else if (isatty(STDIN_FILENO))/*and could load libreadline: */ |
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408 | { |
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409 | /* Allow conditional parsing of the ~/.inputrc file. */ |
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410 | *fe_rl_readline_name = "Singular"; |
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411 | /* Tell the completer that we want a crack first. */ |
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412 | *fe_rl_attempted_completion_function = (CPPFunction *)singular_completion; |
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413 | /* try to read a history */ |
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414 | (*fe_using_history)(); |
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415 | using_history_called=TRUE; |
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416 | char *p = getenv("SINGULARHIST"); |
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417 | if (p != NULL) |
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418 | { |
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419 | (*fe_read_history) (p); |
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420 | } |
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421 | |
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422 | /* set the output stream */ |
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423 | if(!isatty(STDOUT_FILENO)) |
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424 | { |
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425 | #ifdef atarist |
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426 | *fe_rl_outstream = fopen( "/dev/tty", "w" ); |
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427 | #else |
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428 | char *fn=ttyname(fileno(stdin));//if stdout is not a tty, maybe stdin is? |
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429 | if (fn!=NULL) *fe_rl_outstream = fopen( fn, "w" ); |
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430 | #endif |
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431 | } |
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432 | fe_fgets_stdin=fe_fgets_stdin_drl; |
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433 | return fe_fgets_stdin_drl(pr,s,size); |
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434 | } |
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435 | else |
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436 | { |
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437 | fe_fgets_stdin=fe_fgets; |
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438 | return fe_fgets(pr,s,size); |
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439 | } |
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440 | #else |
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441 | #if !defined(HAVE_READLINE) && defined(HAVE_FEREAD) |
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442 | fe_fgets_stdin=fe_fgets_stdin_emu; |
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443 | return(fe_fgets_stdin_emu(pr,s,size)); |
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444 | #else |
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445 | fe_fgets_stdin=fe_fgets; |
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446 | return(fe_fgets(pr,s,size)); |
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447 | #endif |
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448 | #endif |
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449 | } |
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450 | |
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451 | /* ===================================================================*/ |
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452 | /* = batch mode = */ |
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453 | /* ===================================================================*/ |
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454 | /* dummy (for batch mode): */ |
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455 | char * fe_fgets_dummy(const char */*pr*/,char */*s*/, int /*size*/) |
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456 | { |
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457 | return NULL; |
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458 | } |
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459 | |
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