| 1 | #include <stdio.h> |
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| 2 | #include <string.h> |
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| 3 | #include <stdlib.h> |
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| 4 | #include <ctype.h> |
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| 5 | #include "owl.h" |
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| 6 | |
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| 7 | static const char fileIdent[] = "$Id$"; |
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| 8 | |
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| 9 | /* start with line aline (where the first line is 1) and print 'lines' |
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| 10 | * lines |
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| 11 | */ |
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| 12 | int owl_text_truncate_lines(char *out, char *in, int aline, int lines) |
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| 13 | { |
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| 14 | char *ptr1, *ptr2; |
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| 15 | int i; |
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| 16 | |
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| 17 | strcpy(out, ""); |
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| 18 | |
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| 19 | if (aline==0) aline=1; /* really illegal use */ |
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| 20 | |
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| 21 | /* find the starting line */ |
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| 22 | ptr1=in; |
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| 23 | if (aline!=1) { |
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| 24 | for (i=0; i<aline-1; i++) { |
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| 25 | ptr1=strchr(ptr1, '\n'); |
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| 26 | if (!ptr1) return(-1); |
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| 27 | ptr1++; |
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| 28 | } |
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| 29 | } |
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| 30 | /* ptr1 now holds the starting point */ |
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| 31 | |
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| 32 | /* copy in the next 'lines' lines */ |
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| 33 | if (lines<1) return(-1); |
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| 34 | |
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| 35 | for (i=0; i<lines; i++) { |
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| 36 | ptr2=strchr(ptr1, '\n'); |
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| 37 | if (!ptr2) { |
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| 38 | strcat(out, ptr1); |
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| 39 | return(-1); |
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| 40 | } |
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| 41 | strncat(out, ptr1, ptr2-ptr1+1); |
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| 42 | ptr1=ptr2+1; |
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| 43 | } |
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| 44 | return(0); |
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| 45 | } |
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| 46 | |
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| 47 | |
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| 48 | /* the first column is column 0. The message is expected to end in a |
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| 49 | * new line for now */ |
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| 50 | void owl_text_truncate_cols(char *out, char *in, int acol, int bcol) |
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| 51 | { |
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| 52 | char *ptr1, *ptr2, *tmpbuff, *last; |
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| 53 | int len; |
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| 54 | |
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| 55 | tmpbuff=owl_malloc(strlen(in)+20); |
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| 56 | |
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| 57 | strcpy(tmpbuff, ""); |
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| 58 | last=in+strlen(in)-1; |
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| 59 | ptr1=in; |
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| 60 | while (ptr1<last) { |
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| 61 | ptr2=strchr(ptr1, '\n'); |
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| 62 | if (!ptr2) { |
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| 63 | /* but this shouldn't happen if we end in a \n */ |
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| 64 | break; |
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| 65 | } |
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| 66 | |
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| 67 | if (ptr2==ptr1) { |
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| 68 | strcat(tmpbuff, "\n"); |
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| 69 | ptr1++; |
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| 70 | continue; |
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| 71 | } |
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| 72 | |
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| 73 | /* we need to check that we won't run over here */ |
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| 74 | if ( (ptr2-ptr1) < (bcol-acol) ) { |
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| 75 | len=ptr2-(ptr1+acol); |
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| 76 | } else { |
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| 77 | len=bcol-acol; |
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| 78 | } |
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| 79 | if ((ptr1+len)>=last) { |
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| 80 | len-=last-(ptr1+len); |
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| 81 | } |
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| 82 | |
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| 83 | strncat(tmpbuff, ptr1+acol, len); |
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| 84 | strcat(tmpbuff, "\n"); |
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| 85 | |
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| 86 | ptr1=ptr2+1; |
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| 87 | } |
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| 88 | strcpy(out, tmpbuff); |
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| 89 | owl_free(tmpbuff); |
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| 90 | } |
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| 91 | |
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| 92 | |
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| 93 | void owl_text_indent(char *out, char *in, int n) |
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| 94 | { |
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| 95 | char *ptr1, *ptr2, *last; |
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| 96 | int i; |
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| 97 | |
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| 98 | strcpy(out, ""); |
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| 99 | |
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| 100 | last=in+strlen(in)-1; |
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| 101 | ptr1=in; |
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| 102 | while (ptr1<=last) { |
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| 103 | for (i=0; i<n; i++) { |
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| 104 | strcat(out, " "); |
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| 105 | } |
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| 106 | ptr2=strchr(ptr1, '\n'); |
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| 107 | if (!ptr2) { |
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| 108 | strcat(out, ptr1); |
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| 109 | break; |
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| 110 | } else { |
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| 111 | strncat(out, ptr1, ptr2-ptr1+1); |
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| 112 | } |
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| 113 | ptr1=ptr2+1; |
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| 114 | } |
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| 115 | } |
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| 116 | |
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| 117 | int owl_text_num_lines(char *in) |
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| 118 | { |
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| 119 | int lines, i; |
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| 120 | |
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| 121 | lines=0; |
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| 122 | for (i=0; in[i]!='\0'; i++) { |
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| 123 | if (in[i]=='\n') lines++; |
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| 124 | } |
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| 125 | |
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| 126 | /* if the last char wasn't a \n there's one more line */ |
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| 127 | if (i>0 && in[i-1]!='\n') lines++; |
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| 128 | |
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| 129 | return(lines); |
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| 130 | } |
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| 131 | |
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| 132 | |
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| 133 | /* caller must free the return */ |
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| 134 | char *owl_text_htmlstrip(char *in) |
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| 135 | { |
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| 136 | char *ptr1, *end, *ptr2, *ptr3, *out, *out2; |
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| 137 | |
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| 138 | out=owl_malloc(strlen(in)+30); |
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| 139 | strcpy(out, ""); |
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| 140 | |
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| 141 | ptr1=in; |
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| 142 | end=in+strlen(in); |
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| 143 | |
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| 144 | while(ptr1<end) { |
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| 145 | /* look for an open bracket */ |
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| 146 | ptr2=strchr(ptr1, '<'); |
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| 147 | |
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| 148 | /* if none, copy in from here to end and exit */ |
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| 149 | if (ptr2==NULL) { |
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| 150 | strcat(out, ptr1); |
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| 151 | break; |
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| 152 | } |
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| 153 | |
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| 154 | /* otherwise copy in everything before the open bracket */ |
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| 155 | if (ptr2>ptr1) { |
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| 156 | strncat(out, ptr1, ptr2-ptr1); |
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| 157 | } |
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| 158 | |
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| 159 | /* find the close bracket */ |
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| 160 | ptr3=strchr(ptr2, '>'); |
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| 161 | |
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| 162 | /* if there is no close, copy as you are and exit */ |
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| 163 | if (!ptr3) { |
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| 164 | strcat(out, ptr2); |
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| 165 | break; |
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| 166 | } |
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| 167 | |
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| 168 | /* look for things we know */ |
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| 169 | if (!strncasecmp(ptr2, "<BODY ", 6) || |
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| 170 | !strncasecmp(ptr2, "<FONT", 5) || |
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| 171 | !strncasecmp(ptr2, "<HTML", 5) || |
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| 172 | !strncasecmp(ptr2, "</FONT", 6) || |
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| 173 | !strncasecmp(ptr2, "</HTML", 6) || |
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| 174 | !strncasecmp(ptr2, "</BODY", 6)) { |
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| 175 | |
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| 176 | /* advance to beyond the angle brakcet and go again */ |
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| 177 | ptr1=ptr3+1; |
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| 178 | continue; |
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| 179 | } |
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| 180 | if (!strncasecmp(ptr2, "<BR>", 4)) { |
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| 181 | strcat(out, "\n"); |
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| 182 | ptr1=ptr3+1; |
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| 183 | continue; |
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| 184 | } |
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| 185 | |
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| 186 | /* if it wasn't something we know, copy to the > and go again */ |
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| 187 | strncat(out, ptr2, ptr3-ptr2+1); |
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| 188 | ptr1=ptr3+1; |
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| 189 | } |
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| 190 | |
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| 191 | out2=owl_text_substitute(out, "<", "<"); |
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| 192 | owl_free(out); |
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| 193 | out=owl_text_substitute(out2, ">", ">"); |
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| 194 | owl_free(out2); |
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| 195 | out2=owl_text_substitute(out, "&", "&"); |
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| 196 | owl_free(out); |
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| 197 | out=owl_text_substitute(out2, """, "\""); |
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| 198 | owl_free(out2); |
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| 199 | out2=owl_text_substitute(out, " ", " "); |
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| 200 | owl_free(out); |
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| 201 | out=owl_text_substitute(out2, " ", " "); |
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| 202 | owl_free(out2); |
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| 203 | out2=owl_text_substitute(out, " ", " "); |
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| 204 | owl_free(out); |
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| 205 | out=owl_text_substitute(out2, "&endash;", "--"); |
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| 206 | owl_free(out2); |
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| 207 | out2=owl_text_substitute(out, "&emdash;", "---"); |
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| 208 | owl_free(out); |
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| 209 | |
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| 210 | return(out2); |
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| 211 | } |
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| 212 | |
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| 213 | /* caller must free the return */ |
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| 214 | char *owl_text_wordwrap(char *in, int col) |
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| 215 | { |
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| 216 | char *out; |
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| 217 | int cur, lastspace, len, lastnewline; |
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| 218 | |
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| 219 | out=owl_strdup(in); |
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| 220 | len=strlen(in); |
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| 221 | cur=0; |
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| 222 | lastspace=-1; |
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| 223 | lastnewline=-1; |
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| 224 | |
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| 225 | while (cur<(len-1)) { |
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| 226 | if (out[cur]==' ') { |
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| 227 | lastspace=cur; |
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| 228 | cur++; |
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| 229 | continue; |
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| 230 | } else if (out[cur]=='\n') { |
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| 231 | lastnewline=cur; |
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| 232 | cur++; |
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| 233 | continue; |
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| 234 | } |
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| 235 | |
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| 236 | /* do we need to wrap? */ |
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| 237 | if ( (cur-(lastnewline+1)) > col ) { |
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| 238 | if (lastspace==-1 || |
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| 239 | (lastnewline>0 && (lastspace<=lastnewline))) { |
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| 240 | /* we can't help, sorry */ |
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| 241 | cur++; |
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| 242 | continue; |
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| 243 | } |
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| 244 | |
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| 245 | /* turn the last space into a newline */ |
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| 246 | out[lastspace]='\n'; |
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| 247 | lastnewline=lastspace; |
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| 248 | lastspace=-1; |
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| 249 | cur++; |
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| 250 | continue; |
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| 251 | } |
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| 252 | |
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| 253 | cur++; |
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| 254 | continue; |
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| 255 | } |
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| 256 | return(out); |
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| 257 | } |
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| 258 | |
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| 259 | /* this modifies 'in' */ |
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| 260 | void owl_text_wordunwrap(char *in) |
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| 261 | { |
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| 262 | int i, j; |
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| 263 | |
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| 264 | j=strlen(in); |
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| 265 | for (i=0; i<j; i++) { |
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| 266 | if ( (in[i]=='\n') && |
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| 267 | ((i>0) && (i<(j-1))) && |
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| 268 | (in[i-1]!='\n') && |
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| 269 | (in[i+1]!='\n') ) |
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| 270 | in[i]=' '; |
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| 271 | } |
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| 272 | } |
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| 273 | |
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| 274 | /* exactly like strstr but case insensitive */ |
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| 275 | char *stristr(char *a, char *b) |
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| 276 | { |
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| 277 | char *x, *y, *ret; |
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| 278 | |
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| 279 | if ((x=owl_strdup(a))==NULL) return(NULL); |
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| 280 | if ((y=owl_strdup(b))==NULL) return(NULL); |
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| 281 | downstr(x); |
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| 282 | downstr(y); |
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| 283 | ret=strstr(x, y); |
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| 284 | if (ret==NULL) { |
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| 285 | owl_free(x); |
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| 286 | owl_free(y); |
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| 287 | return(NULL); |
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| 288 | } |
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| 289 | ret=ret-x+a; |
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| 290 | owl_free(x); |
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| 291 | owl_free(y); |
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| 292 | return(ret); |
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| 293 | } |
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| 294 | |
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| 295 | /* return 1 if a string is only whitespace, otherwise 0 */ |
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| 296 | int only_whitespace(char *s) |
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| 297 | { |
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| 298 | int i; |
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| 299 | for (i=0; s[i]; i++) { |
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| 300 | if (!isspace((int) s[i])) return(0); |
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| 301 | } |
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| 302 | return(1); |
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| 303 | } |
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| 304 | |
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| 305 | char *owl_getquoting(char *line) |
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| 306 | { |
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| 307 | if (line[0]=='\0') return("'"); |
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| 308 | if (strchr(line, '\'')) return("\""); |
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| 309 | if (strchr(line, '"')) return("'"); |
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| 310 | if (strchr(line, ' ')) return("'"); |
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| 311 | return(""); |
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| 312 | } |
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| 313 | |
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| 314 | /* Return a string with any occurances of 'from' replaced with 'to'. |
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| 315 | * Does not currently handle backslash quoting, but may in the future. |
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| 316 | * Caller must free returned string. |
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| 317 | */ |
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| 318 | char *owl_text_substitute(char *in, char *from, char *to) |
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| 319 | { |
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| 320 | |
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| 321 | char *out; |
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| 322 | int outlen, tolen, fromlen, inpos=0, outpos=0; |
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| 323 | |
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| 324 | if (!*from) return owl_strdup(in); |
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| 325 | |
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| 326 | outlen = strlen(in)+1; |
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| 327 | tolen = strlen(to); |
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| 328 | fromlen = strlen(from); |
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| 329 | out = malloc(outlen); |
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| 330 | |
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| 331 | while (in[inpos]) { |
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| 332 | if (!strncmp(in+inpos, from, fromlen)) { |
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| 333 | outlen += tolen; |
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| 334 | out = owl_realloc(out, outlen); |
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| 335 | strcpy(out+outpos, to); |
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| 336 | inpos += fromlen; |
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| 337 | outpos += tolen; |
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| 338 | } else { |
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| 339 | out[outpos] = in[inpos]; |
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| 340 | inpos++; outpos++; |
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| 341 | } |
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| 342 | } |
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| 343 | out[outpos] = '\0'; |
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| 344 | return(out); |
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| 345 | } |
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| 346 | |
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| 347 | /* replace all instances of character a in buff with the character |
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| 348 | * b. buff must be null terminated. |
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| 349 | */ |
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| 350 | void owl_text_tr(char *buff, char a, char b) |
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| 351 | { |
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| 352 | int i; |
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| 353 | |
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| 354 | owl_function_debugmsg("In: %s", buff); |
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| 355 | for (i=0; buff[i]!='\0'; i++) { |
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| 356 | if (buff[i]==a) buff[i]=b; |
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| 357 | } |
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| 358 | owl_function_debugmsg("Out: %s", buff); |
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| 359 | } |
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| 360 | |
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| 361 | /* Return a string which is like 'in' except that every instance of |
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| 362 | * any character in 'toquote' found in 'in' is preceeded by the string |
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| 363 | * 'quotestr'. For example, owl_text_quote(in, "+*.", "\") would |
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| 364 | * place a backslash before every '+', '*' or '.' in 'in'. It is |
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| 365 | * permissable for a character in 'quotestr' to be in 'toquote'. |
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| 366 | * On success returns the string, on error returns NULL. |
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| 367 | */ |
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| 368 | char *owl_text_quote(char *in, char *toquote, char *quotestr) |
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| 369 | { |
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| 370 | int i, x, r, place, escape; |
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| 371 | int in_len, toquote_len, quotestr_len; |
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| 372 | char *out; |
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| 373 | |
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| 374 | in_len=strlen(in); |
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| 375 | toquote_len=strlen(toquote); |
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| 376 | quotestr_len=strlen(quotestr); |
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| 377 | out=owl_malloc((in_len*quotestr_len)+30); |
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| 378 | place=0; |
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| 379 | escape = 0; |
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| 380 | for (i=0; i<in_len; i++) { |
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| 381 | if(strchr(toquote, in[i]) != NULL) |
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| 382 | escape++; |
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| 383 | } |
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| 384 | out = owl_malloc(in_len + quotestr_len*escape+1); |
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| 385 | for (i=0; i<in_len; i++) { |
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| 386 | |
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| 387 | /* check if it's a character that needs quoting */ |
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| 388 | for (x=0; x<toquote_len; x++) { |
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| 389 | if (in[i]==toquote[x]) { |
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| 390 | /* quote it */ |
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| 391 | for (r=0; r<quotestr_len; r++) { |
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| 392 | out[place+r]=quotestr[r]; |
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| 393 | } |
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| 394 | place+=quotestr_len; |
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| 395 | break; |
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| 396 | } |
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| 397 | } |
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| 398 | |
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| 399 | /* either way, we now copy over the character */ |
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| 400 | out[place]=in[i]; |
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| 401 | place++; |
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| 402 | } |
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| 403 | out[place]='\0'; |
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| 404 | return(out); |
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| 405 | } |
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