| 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 "owl.h" |
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| 5 | |
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| 6 | int owl_text_truncate_lines(char *out, char *in, int aline, int lines) { |
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| 7 | /* start with line aline (where the first line is 1) and print |
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| 8 | * 'lines' lines |
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| 9 | */ |
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| 10 | char *ptr1, *ptr2; |
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| 11 | int i; |
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| 12 | |
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| 13 | strcpy(out, ""); |
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| 14 | |
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| 15 | if (aline==0) aline=1; /* really illegal use */ |
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| 16 | |
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| 17 | /* find the starting line */ |
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| 18 | ptr1=in; |
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| 19 | if (aline!=1) { |
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| 20 | for (i=0; i<aline-1; i++) { |
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| 21 | ptr1=strchr(ptr1, '\n'); |
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| 22 | if (!ptr1) return(-1); |
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| 23 | ptr1++; |
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| 24 | } |
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| 25 | } |
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| 26 | /* ptr1 now holds the starting point */ |
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| 27 | |
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| 28 | /* copy in the next 'lines' lines */ |
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| 29 | if (lines<1) return(-1); |
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| 30 | |
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| 31 | for (i=0; i<lines; i++) { |
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| 32 | ptr2=strchr(ptr1, '\n'); |
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| 33 | if (!ptr2) { |
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| 34 | strcat(out, ptr1); |
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| 35 | return(-1); |
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| 36 | } |
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| 37 | strncat(out, ptr1, ptr2-ptr1+1); |
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| 38 | ptr1=ptr2+1; |
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| 39 | } |
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| 40 | return(0); |
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| 41 | } |
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| 42 | |
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| 43 | void owl_text_truncate_cols(char *out, char *in, int acol, int bcol) { |
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| 44 | char *ptr1, *ptr2, *tmpbuff, *last; |
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| 45 | int len; |
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| 46 | |
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| 47 | /* the first column is column 0 */ |
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| 48 | |
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| 49 | /* the message is expected to end in a new line for now */ |
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| 50 | |
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| 51 | tmpbuff=owl_malloc(strlen(in)+20); |
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| 52 | |
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| 53 | strcpy(tmpbuff, ""); |
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| 54 | last=in+strlen(in)-1; |
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| 55 | ptr1=in; |
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| 56 | while (ptr1<last) { |
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| 57 | ptr2=strchr(ptr1, '\n'); |
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| 58 | if (!ptr2) { |
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| 59 | /* but this shouldn't happen if we end in a \n */ |
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| 60 | break; |
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| 61 | } |
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| 62 | |
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| 63 | if (ptr2==ptr1) { |
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| 64 | strcat(tmpbuff, "\n"); |
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| 65 | ptr1++; |
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| 66 | continue; |
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| 67 | } |
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| 68 | |
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| 69 | /* we need to check that we won't run over here */ |
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| 70 | if ( (ptr2-ptr1) < (bcol-acol) ) { |
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| 71 | len=ptr2-(ptr1+acol); |
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| 72 | } else { |
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| 73 | len=bcol-acol; |
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| 74 | } |
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| 75 | if ((ptr1+len)>=last) { |
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| 76 | len-=last-(ptr1+len); |
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| 77 | } |
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| 78 | |
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| 79 | strncat(tmpbuff, ptr1+acol, len); |
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| 80 | strcat(tmpbuff, "\n"); |
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| 81 | |
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| 82 | ptr1=ptr2+1; |
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| 83 | } |
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| 84 | strcpy(out, tmpbuff); |
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| 85 | owl_free(tmpbuff); |
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| 86 | } |
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| 87 | |
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| 88 | |
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| 89 | void owl_text_indent(char *out, char *in, int n) { |
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| 90 | char *ptr1, *ptr2, *last; |
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| 91 | int i; |
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| 92 | |
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| 93 | strcpy(out, ""); |
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| 94 | |
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| 95 | last=in+strlen(in)-1; |
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| 96 | ptr1=in; |
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| 97 | while (ptr1<=last) { |
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| 98 | for (i=0; i<n; i++) { |
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| 99 | strcat(out, " "); |
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| 100 | } |
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| 101 | ptr2=strchr(ptr1, '\n'); |
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| 102 | if (!ptr2) { |
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| 103 | strcat(out, ptr1); |
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| 104 | break; |
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| 105 | } else { |
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| 106 | strncat(out, ptr1, ptr2-ptr1+1); |
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| 107 | } |
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| 108 | ptr1=ptr2+1; |
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| 109 | } |
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| 110 | } |
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| 111 | |
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| 112 | |
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| 113 | int owl_text_num_lines(char *in) { |
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| 114 | int lines, i; |
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| 115 | |
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| 116 | lines=0; |
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| 117 | for (i=0; in[i]!='\0'; i++) { |
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| 118 | if (in[i]=='\n') lines++; |
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| 119 | } |
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| 120 | |
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| 121 | /* if the last char wasn't a \n there's one more line */ |
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| 122 | if (in[i-1]!='\n') lines++; |
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| 123 | |
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| 124 | return(lines); |
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| 125 | } |
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| 126 | |
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